& also output examples
Native
Android
Binder transactionsGet system propertyReveal manually registered native symbolsEnumerate loaded classesClass descriptionTurn WiFi offSet proxyGet IMEIHook io InputStreamAndroid make ToastAwait for specific module to loadWebview URLSPrint all runtime strings & stacktracePrint shared preferences updatesString comparisonHook JNI by addressHook constructorHook Java reflectionTrace classHooking Unity3dGet Android IDChange locationBypass FLAG_SECUREShared Preferences updateHook all method overloadsRegister broadcast receiverIncrease step countlist classes implements interface with class loaders- File system access hook
$ frida --codeshare FrenchYeti/android-file-system-access-hook -f com.example.app --no-pause - How to remove/disable java hooks ? Assign
nullto theimplementationproperty.
iOS
Windows
Sublime snippets
{ "scope": "source.js", "completions": [ {"trigger": "fridainterceptor", "contents": "Interceptor.attach(\n ptr,\n {\n onEnter:function(args) {\n\n },\n onLeave: function(retval) {\n\n }\n }\n)"}, {"trigger": "fridaperform", "contents": "function main(){\n console.log('main()');\n}\n\nconsole.log('script loaded');\nJava.perform(main);"}, {"trigger": "fridause", "contents": "var kls = Java.use('kls');"}, {"trigger": "fridahex", "contents": "hexdump(\n ptr,\n {\n offset: 0,\n length: ptr_size\n }\n);" }, {"trigger": "fridabacktrace", "contents": "console.log('called from:\\n' +\n Thread.backtrace(this.context, Backtracer.ACCURATE)\n .map(DebugSymbol.fromAddress).join('\\n') + '\\n'\n);"}, {"trigger": "fridamods", "contents": "var mods = Process.enumerateModules().filter(function(mod){\n return mod.name.includes(\"<name>\");\n});"}, {"trigger": "fridaexport", "contents": "Module.findExportByName(null, \"<export_name>\");"}, {"trigger": "fridabase", "contents": "Module.findBaseAddress(name);"}, {"trigger": "fridaoverload", "contents": "kls.method_name.overload().implementation=function(){}"} ] } Vim snippets
To list abbreviations :ab
Expand by writing key and <Space>
- Add to
~/.vimrc
ab fridaintercept Interceptor.attach(ptr, {<CR><Tab>onEnter: function(args) {<CR><CR>},<CR>onLeave: function(retval) {<CR><CR>}<CR><BS>}) ab fridabacktrace console.warn(Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join('\n'));<ESC>F(3; ab fridadescribe console.log(Object.getOwnPropertyNames(Java.use('$').__proto__).join('\n\t'))<Esc>F$ JEB
Java method hook generator using keyboard shortcut
curl -o ~/$JEB$/scripts/FridaCodeGenerator.py https://raw.githubusercontent.com/iddoeldor/frida-snippets/master/scripts/FridaCodeGenerator.py- Place cursor at Java method's signature
- Press
Ctrl+Shift+Z - Code is copied to system clipboard (using
xclip)
var keylog_callback = new NativeCallback((ssl, line) => { send(Memory.readCString(line)); }, 'void', ['pointer', 'pointer']); if (ObjC.available) { var CALLBACK_OFFSET = 0x2A8 if (Memory.readDouble(Module.findExportByName('CoreFoundation', 'kCFCoreFoundationVersionNumber')) >= 1751.108) { CALLBACK_OFFSET = 0x2B8 } Interceptor.attach(Module.findExportByName('libboringssl.dylib', 'SSL_CTX_set_info_callback'), { onEnter(args) { ptr(args[0]).add(CALLBACK_OFFSET).writePointer(keylog_callback) } }) } else if (Java.available) { var set_keylog_callback = new NativeFunction(Module.findExportByName('libssl.so', 'SSL_CTX_set_keylog_callback'), 'void', ['pointer', 'pointer']); Interceptor.attach(Module.findExportByName('libssl.so', 'SSL_CTX_new'), { onLeave(retval) { set_keylog_callback(retval, keylog_callback) } }) }#include <iostream> #include <string> extern "C" { void* create_stdstr(char *data, int size) { std::string* s = new std::string(); (*s).assign(data, size); return s; } }$ ./android-ndk/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang++ a.cpp -o a -shared -static-libstdc++ && adb push a /data/local/tmp/a[device]-> function readStdString(str) { if ((str.readU8() & 1) === 1) { // size LSB (=1) indicates if it's a long string return str.add(2 * Process.pointerSize).readPointer().readUtf8String(); } return str.add(1).readUtf8String(); } [device]-> Module.load('/data/local/tmp/a'); [device]-> var fp_create_stdstr = Module.findExportByName('a', 'create_stdstr'); [device]-> var createStdString = new NativeFunction(fp_create_stdstr, 'pointer', ['pointer', 'int']); [device]-> var stdstr1 = createStdString(Memory.allocUtf8String("abcd"), 3); "0x07691234567" [device]-> readStdString(stdstr1); "abc"$ ./aarch64-linux-android21-clang /tmp/b.c -o /tmp/a -shared ../sysroot/usr/lib/aarch64-linux-android/21/liblog.so && adb push /tmp/a /data/local/tmp/a#include <stdio.h> #include <stdlib.h> #include <android/log.h> #define TAG "TEST1" #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, TAG, __VA_ARGS__) #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, TAG, __VA_ARGS__) void test(void) { FILE* fp = popen("ls -l /sdcard 2>&1", "r"); if (fp == NULL) LOGE("executing cmd failed"); char b[256]; while (fgets(b, sizeof(b), fp) != NULL) { LOGI("%s", b); } pclose(fp); }$ frida -Uf com.app --no-pause --enable-jit -e "Module.load('/data/local/tmp/a')" [ ] -> new NativeFunction(Module.findExportByName('a', 'test'), 'void', [])()Intercept funcPtr & log who read/write to x2 via removing permissions w/ mprotect.
Process.setExceptionHandler(function(exp) { console.warn(JSON.stringify(Object.assign(exp, { _lr: DebugSymbol.fromAddress(exp.context.lr), _pc: DebugSymbol.fromAddress(exp.context.pc) }), null, 2)); Memory.protect(exp.memory.address, Process.pointerSize, 'rw-'); // can also use `new NativeFunction(Module.findExportByName(null, 'mprotect'), 'int', ['pointer', 'uint', 'int'])(parseInt(this.context.x2), 2, 0)` return true; // goto PC }); Interceptor.attach(funcPtr, { onEnter: function (args) { console.log('onEnter', JSON.stringify({ x2: this.context.x2, mprotect_ret: Memory.protect(this.context.x2, 2, '---'), errno: this.errno }, null, 2)); }, onLeave: function (retval) { console.log('onLeave'); } });Output example
[iOS Device::com.app]-> onEnter { "x2": "0x1c145c6e0", "mprotect_ret": true, "errno": 2 } { "type": "access-violation", "address": "0x1853b0198", "memory": { "operation": "read", "address": "0x1c145c6e0" }, "context": { "lr": "0x100453358", "fp": "0x16fb2e860", "x28": "0x0", "x27": "0x0", "x26": "0x104312600", "x25": "0x0", "x24": "0x0", "x23": "0x0", "x22": "0x0", "x21": "0xb000000422bbda03", "x20": "0x1c4a22560", "x19": "0xb000000422bbda03", "x18": "0x0", "x17": "0x100d25290", "x16": "0x1853b0190", "x15": "0x0", "x14": "0x5", "x13": "0xe5a1c4119597", "x12": "0x10e80ca30", "x11": "0x180000003f", "x10": "0x10e80ca00", "x9": "0x1020ad7c3", "x8": "0x0", "x7": "0x0", "x6": "0x0", "x5": "0x0", "x4": "0xb000000422bbda03", "x3": "0x1c4a22560", "x2": "0x1c145c6e0", "x1": "0x1020ad7c3", "x0": "0x1c145c6e0", "sp": "0x16fb2e790", "pc": "0x1853b0198" }, "nativeContext": "0x16fc42b24" } onLeave Process .getModuleByName({ linux: 'libc.so', darwin: 'libSystem.B.dylib', windows: 'ws2_32.dll' }[Process.platform]) .enumerateExports().filter(ex => ex.type === 'function' && ['connect', 'recv', 'send', 'read', 'write'].some(prefix => ex.name.indexOf(prefix) === 0)) .forEach(ex => { Interceptor.attach(ex.address, { onEnter: function (args) { var fd = args[0].toInt32(); var socktype = Socket.type(fd); if (socktype !== 'tcp' && socktype !== 'tcp6') return; var address = Socket.peerAddress(fd); if (address === null) return; console.log(fd, ex.name, address.ip + ':' + address.port); } }) })Output example
Android example
# wrap the script above inside Java.perform $ frida -Uf com.example.app -l script.js --no-pause [Android Model-X::com.example.app]-> 117 write 5.0.2.1:5242 117 read 5.0.2.1:5242 135 write 5.0.2.1:4244 135 read 5.0.2.1:4244 135 read 5.0.2.1:4244An example for intercepting libc#open & logging backtrace if specific file was opened.
Interceptor.attach(Module.findExportByName("/system/lib/libc.so", "open"), { onEnter: function(args) { this.flag = false; var filename = Memory.readCString(ptr(args[0])); console.log('filename =', filename) if (filename.endsWith(".xml")) { this.flag = true; var backtrace = Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join("\n\t"); console.log("file name [ " + Memory.readCString(ptr(args[0])) + " ]\nBacktrace:" + backtrace); } }, onLeave: function(retval) { if (this.flag) // passed from onEnter console.warn("\nretval: " + retval); } });var fds = {}; // for f in /proc/`pidof $APP`/fd/*; do echo $f': 'readlink $f; done Interceptor.attach(Module.findExportByName(null, 'open'), { onEnter: function (args) { var fname = args[0].readCString(); if (fname.endsWith('.jar')) { this.flag = true; this.fname = fname; } }, onLeave: function (retval) { if (this.flag) { fds[retval] = this.fname; } } }); ['read', 'pread', 'readv'].forEach(fnc => { Interceptor.attach(Module.findExportByName(null, fnc), { onEnter: function (args) { var fd = args[0]; if (fd in fds) console.log(`${fnc}: ${fds[fd]} \t${Thread.backtrace(this.context, Backtracer.ACCURATE).map(DebugSymbol.fromAddress).join('\n\t')}`); } }); });Output example
Intecepting `com.android.chrome`
import frida from frida_tools.application import Reactor import threading import click class Shell(object): def __init__(self, argv, env): self._stop_requested = threading.Event() self._reactor = Reactor(run_until_return=lambda reactor: self._stop_requested.wait()) self._device = frida.get_usb_device() self._sessions = set() self._device.on("child-added", lambda child: self._reactor.schedule(lambda: self._on_child_added(child))) self._device.on("child-removed", lambda child: self._reactor.schedule(lambda: self._on_child_removed(child))) self._device.on("output", lambda pid, fd, data: self._reactor.schedule(lambda: self._on_output(pid, fd, data))) self.argv = argv self.env = env self.output = [] # stdout will pushed into array def exec(self): self._reactor.schedule(lambda: self._start()) self._reactor.run() def _start(self): click.secho("✔ spawn(argv={})".format(self.argv), fg='green', dim=True) pid = self._device.spawn(self.argv, env=self.env, stdio='pipe') self._instrument(pid) def _stop_if_idle(self): if len(self._sessions) == 0: self._stop_requested.set() def _instrument(self, pid): click.secho("✔ attach(pid={})".format(pid), fg='green', dim=True) session = self._device.attach(pid) session.on("detached", lambda reason: self._reactor.schedule(lambda: self._on_detached(pid, session, reason))) click.secho("✔ enable_child_gating()", fg='green', dim=True) session.enable_child_gating() # print("✔ resume(pid={})".format(pid)) self._device.resume(pid) self._sessions.add(session) def _on_child_added(self, child): click.secho("⚡ child_added: {}".format(child), fg='green', dim=True) self._instrument(child.pid) @staticmethod def _on_child_removed(child): click.secho("⚡ child_removed: {}".format(child), fg='green', dim=True) def _on_output(self, pid, fd, data): # print("⚡ output: pid={}, fd={}, data={}".format(pid, fd, repr(data))) # fd=0 (input) fd=1(stdout) fd=2(stderr) if fd != 2: self.output.append(data) def _on_detached(self, pid, session, reason): click.secho("⚡ detached: pid={}, reason='{}'".format(pid, reason), fg='green', dim=True) self._sessions.remove(session) self._reactor.schedule(self._stop_if_idle, delay=0.5) @staticmethod def _on_message(pid, message): click.secho("⚡ message: pid={}, payload={}".format(pid, message), fg='green', dim=True)Usage example
List directory contents:
def ls(folder): cmd = Shell(['/bin/sh', '-c', 'ls -la ' + folder], None) cmd.exec() for chunk in cmd.output: print(chunk.strip().decode())Pull binary from iOS
cmd = Shell(['/bin/sh', '-c', 'cat /System/Library/PrivateFrameworks/Example.framework/example'], None) cmd.exec() with open('/tmp/example', 'wb+') as f: f.writelines(cmd.output) # $ file /tmp/example # /tmp/example: Mach-O 64-bit 64-bit architecture=12 executableProcess.enumerateModulesSync() .filter(function(m){ return m['path'].toLowerCase().indexOf('app') !=-1 ; }) .forEach(function(m) { console.log(JSON.stringify(m, null, ' ')); // to list exports use Module.enumerateExportsSync(m.name) });List modules & exports
sudo frida Process --no-pause --eval 'var x={};Process.enumerateModulesSync().forEach(function(m){x[m.name] = Module.enumerateExportsSync(m.name)});x' -q | less +FOutput example
{ "name": "app_process64", "base": "0x6313a1c000", "size": 40960, "path": "/system/bin/app_process64" } { "name": "libappfuse.so", "base": "0x749ab96000", "size": 53248, "path": "/system/lib64/libappfuse.so" } { "name": "android.hardware.graphics.mapper@2.0.so", "base": "0x749b448000", "size": 90112, "path": "/system/lib64/android.hardware.graphics.mapper@2.0.so" } { "name": "android.hardware.graphics.mapper@2.1.so", "base": "0x749ac9e000", "size": 94208, "path": "/system/lib64/android.hardware.graphics.mapper@2.1.so" } { "name": "android.hardware.graphics.mapper@3.0.so", "base": "0x74981e0000", "size": 98304, "path": "/system/lib64/android.hardware.graphics.mapper@3.0.so" } { "name": "android.hardware.graphics.mapper@2.0-impl-2.1.so", "base": "0x73fb4cc000", "size": 40960, "path": "/vendor/lib64/hw/android.hardware.graphics.mapper@2.0-impl-2.1.so" } { "name": "android.hardware.graphics.mapper@2.0.so", "base": "0x73fb51f000", "size": 90112, "path": "/system/lib64/vndk-sp-29/android.hardware.graphics.mapper@2.0.so" } { "name": "android.hardware.graphics.mapper@2.1.so", "base": "0x73fb542000", "size": 94208, "path": "/system/lib64/vndk-sp-29/android.hardware.graphics.mapper@2.1.so" } { "name": "base.odex", "base": "0x73ab4cd000", "size": 16965632, "path": "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/oat/arm64/base.odex" } { "name": "libfrida-gadget.so", "base": "0x73a2c05000", "size": 22876160, "path": "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libfrida-gadget.so" } { "name": "libmain.so", "base": "0x73fb894000", "size": 73728, "path": "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libmain.so" } { "name": "libunity.so", "base": "0x739bf88000", "size": 24461312, "path": "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libunity.so" } { "name": "libil2cpp.so", "base": "0x7396fe6000", "size": 25272320, "path": "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libil2cpp.so" } { "name": "DynamiteLoader.odex", "base": "0x73b7ee4000", "size": 376832, "path": "/data/user_de/0/com.google.android.gms/app_chimera/m/00000278/oat/arm64/DynamiteLoader.odex" } { "name": "base.odex", "base": "0x72f2ee3000", "size": 166838272, "path": "/data/app/com.google.android.gms-j7RpxBsNAd3ttAYEdp2ahg==/oat/arm64/base.odex" } { "name": "base.odex", "base": "0x7396e6d000", "size": 28672, "path": "/data/app/com.google.android.trichromelibrary_432418133-X7Kc2Mqi-VXkY12N59kGug==/oat/arm64/base.odex" } { "name": "base.odex", "base": "0x724f15e000", "size": 13225984, "path": "/data/app/com.google.android.webview-w6i6OBFZ7T_wK4W4TpDAiQ==/oat/arm64/base.odex" } { "name": "libmonochrome.so", "base": "0x73b8592000", "size": 76673024, "path": "/data/app/com.google.android.webview-w6i6OBFZ7T_wK4W4TpDAiQ==/base.apk!/lib/arm64-v8a/libmonochrome.so" } { "name": "libnativeNoodleNews.so", "base": "0x723add3000", "size": 962560, "path": "/data/app/com.noodlecake.altosadventure-O2YLuwCOq7LbWSkRHkRLcg==/lib/arm64/libnativeNoodleNews.so" } { "name": "libconscrypt_gmscore_jni.so", "base": "0x7206629000", "size": 1130496, "path": "/data/app/com.google.android.gms-j7RpxBsNAd3ttAYEdp2ahg==/base.apk!/lib/arm64-v8a/libconscrypt_gmscore_jni.so" }Interceptor.attach(Module.findExportByName('libsqlite.so', 'sqlite3_prepare16_v2'), { onEnter: function(args) { console.log('DB: ' + Memory.readUtf16String(args[0]) + '\tSQL: ' + Memory.readUtf16String(args[1])); } });Output example
TODOInterceptor.attach(Module.findExportByName(null, '__system_property_get'), { onEnter: function (args) { this._name = args[0].readCString(); this._value = args[1]; }, onLeave: function (retval) { console.log(JSON.stringify({ result_length: retval, name: this._name, val: this._value.readCString() })); } });Output example
{"result_length":"0x0","name":"ro.kernel.android.tracing","val":""} {"result_length":"0x0","name":"ro.config.hw_log","val":""} {"result_length":"0x0","name":"ro.config.hw_module_log","val":""} {"result_length":"0x1","name":"ro.debuggable","val":"0"} {"result_length":"0x1","name":"persist.sys.huawei.debug.on","val":"0"} {"result_length":"0x1","name":"ro.logsystem.usertype","val":"6"} {"result_length":"0x6","name":"ro.board.platform","val":"hi6250"} {"result_length":"0x4","name":"persist.sys.enable_iaware","val":"true"} {"result_length":"0x1","name":"persist.sys.cpuset.enable","val":"1"} {"result_length":"0x4","name":"persist.sys.cpuset.subswitch","val":"1272"} {"result_length":"0x4","name":"persist.sys.boost.durationms","val":"1000"} {"result_length":"0x4","name":"persist.sys.boost.isbigcore","val":"true"} {"result_length":"0x7","name":"persist.sys.boost.freqmin.b","val":"1805000"} {"result_length":"0x4","name":"persist.sys.boost.ipapower","val":"3500"} {"result_length":"0x0","name":"persist.sys.boost.skipframe","val":""} {"result_length":"0x0","name":"persist.sys.boost.byeachfling","val":""} {"result_length":"0x1","name":"debug.force_rtl","val":"0"} {"result_length":"0x0","name":"ro.hardware.gralloc","val":""} {"result_length":"0x6","name":"ro.hardware","val":"hi6250"} {"result_length":"0x0","name":"ro.kernel.qemu","val":""} {"result_length":"0x0","name":"ro.config.hw_force_rotation","val":""} {"result_length":"0x0","name":"persist.fb_auto_alloc","val":""} {"result_length":"0x0","name":"ro.config.hw_lock_res_whitelist","val":""} {"result_length":"0x3","name":"ro.sf.lcd_density","val":"480"} {"result_length":"0x0","name":"persist.sys.dpi","val":""} {"result_length":"0x0","name":"persist.sys.rog.width","val":""} {"result_length":"0x4","name":"dalvik.vm.usejitprofiles","val":"true"} {"result_length":"0x1","name":"debug.atrace.tags.enableflags","val":"0"} {"result_length":"0x1","name":"ro.debuggable","val":"0"} {"result_length":"0x1","name":"debug.force_rtl","val":"0"} {"result_length":"0x0","name":"ro.config.hw_lock_res_whitelist","val":""} ....var LAST_MSG = ''; Java.perform(() => { Interceptor.attach(Module.findExportByName('libbinder.so', 'ioctl'), { onEnter: function(args) { var binder_write_read_ptr = args[2]; if (args[1] == 0xC0306201) { // BINDER_WRITE_READ var binder_write_read = { // 'fd': args[0].toInt32(), 'write_size': binder_write_read_ptr.readU64(), 'write_consumed': binder_write_read_ptr.add(Process.pointerSize).readU64(), 'write_buffer': binder_write_read_ptr.add(Process.pointerSize * 2).readPointer(), } if (binder_write_read.write_size > 0) { var ptr = binder_write_read.write_buffer.add(binder_write_read.write_consumed + 4); switch (binder_write_read.write_buffer.readU32() & 0xff) { case 0: // BC_TRANSACTION case 1: // BC_REPLY var binder_transaction_data = { 'target': { 'handle': ptr.readU32(), 'ptr': ptr.readPointer() }, 'cookie': ptr.add(8).readPointer(), 'code': ptr.add(16).readU32(), 'flags': ptr.add(20).readU32(), 'sender_pid': ptr.add(24).readS32(), 'sender_euid': ptr.add(28).readU32(), 'data_size': ptr.add(32).readU64(), 'offsets_size': ptr.add(40).readU64(), 'data': { 'ptr': { 'buffer': ptr.add(48).readPointer(), 'offsets': ptr.add(56).readPointer() }, 'buf': ptr.add(48).readByteArray(8) } } var _log = hexdump(binder_transaction_data.data.ptr.buffer, { length: binder_transaction_data.data_size, ansi: true }); if (LAST_MSG.toString() != _log.toString()) { console.log(JSON.stringify(binder_transaction_data, null, 2)); console.log(_log); } break; } } } } }); });Output example
{ "target": { "handle": 16, "ptr": "0x10" }, "cookie": "0x0", "code": 22, "flags": 16, "sender_pid": 0, "sender_euid": 0, "data_size": "68", "offsets_size": "0", "data": { "ptr": { "buffer": "0x78dce3dcf0", "offsets": "0x0" }, "buf": {} } } 0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF 78dce3dcf0 04 00 40 01 1d 00 00 00 61 00 6e 00 64 00 72 00 ..@.....a.n.d.r. 78dce3dd00 6f 00 69 00 64 00 2e 00 6e 00 65 00 74 00 2e 00 o.i.d...n.e.t... 78dce3dd10 77 00 69 00 66 00 69 00 2e 00 49 00 57 00 69 00 w.i.f.i...I.W.i. 78dce3dd20 66 00 69 00 4d 00 61 00 6e 00 61 00 67 00 65 00 f.i.M.a.n.a.g.e. 78dce3dd30 72 00 00 00 r...registerNativeMethods can be used as anti reversing technique to the native .so libraries, e.g. hiding the symbols as much as possible, obfuscating the exported symbols and eventually adding some protection over the JNI bridge. source
var RevealNativeMethods = function() { var pSize = Process.pointerSize; var env = Java.vm.getEnv(); var RegisterNatives = 215, FindClassIndex = 6; // search "215" @ https://docs.oracle.com/javase/8/docs/technotes/guides/jni/spec/functions.html var jclassAddress2NameMap = {}; function getNativeAddress(idx) { return env.handle.readPointer().add(idx * pSize).readPointer(); } // intercepting FindClass to populate Map<address, jclass> Interceptor.attach(getNativeAddress(FindClassIndex), { onEnter: function(args) { jclassAddress2NameMap[args[0]] = args[1].readCString(); } }); // RegisterNative(jClass*, .., JNINativeMethod *methods[nMethods], uint nMethods) // https://android.googlesource.com/platform/libnativehelper/+/master/include_jni/jni.h#977 Interceptor.attach(getNativeAddress(RegisterNatives), { onEnter: function(args) { for (var i = 0, nMethods = parseInt(args[3]); i < nMethods; i++) { /* https://android.googlesource.com/platform/libnativehelper/+/master/include_jni/jni.h#129 typedef struct { const char* name; const char* signature; void* fnPtr; } JNINativeMethod; */ var structSize = pSize * 3; // = sizeof(JNINativeMethod) var methodsPtr = ptr(args[2]); var signature = methodsPtr.add(i * structSize + pSize).readPointer(); var fnPtr = methodsPtr.add(i * structSize + (pSize * 2)).readPointer(); // void* fnPtr var jClass = jclassAddress2NameMap[args[0]].split('/'); var methodName = methodsPtr.add(i * structSize).readPointer().readCString(); console.log('\x1b[3' + '6;01' + 'm', JSON.stringify({ module: DebugSymbol.fromAddress(fnPtr)['moduleName'], // https://www.frida.re/docs/javascript-api/#debugsymbol package: jClass.slice(0, -1).join('.'), class: jClass[jClass.length - 1], method: methodName, // methodsPtr.readPointer().readCString(), // char* name signature: signature.readCString(), // char* signature TODO Java bytecode signature parser { Z: 'boolean', B: 'byte', C: 'char', S: 'short', I: 'int', J: 'long', F: 'float', D: 'double', L: 'fully-qualified-class;', '[': 'array' } https://github.com/skylot/jadx/blob/master/jadx-core/src/main/java/jadx/core/dex/nodes/parser/SignatureParser.java address: fnPtr }), '\x1b[39;49;00m'); } } }); } Java.perform(RevealNativeMethods);@OldVersion
var fIntercepted = false; function revealNativeMethods() { if (fIntercepted === true) { return; } var jclassAddress2NameMap = {}; var androidRunTimeSharedLibrary = "libart.so"; // may change between devices Module.enumerateSymbolsSync(androidRunTimeSharedLibrary).forEach(function(symbol){ switch (symbol.name) { case "_ZN3art3JNI21RegisterNativeMethodsEP7_JNIEnvP7_jclassPK15JNINativeMethodib": /* $ c++filt "_ZN3art3JNI21RegisterNativeMethodsEP7_JNIEnvP7_jclassPK15JNINativeMethodib" art::JNI::RegisterNativeMethods(_JNIEnv*, _jclass*, JNINativeMethod const*, int, bool) */ var RegisterNativeMethodsPtr = symbol.address; console.log("RegisterNativeMethods is at " + RegisterNativeMethodsPtr); Interceptor.attach(RegisterNativeMethodsPtr, { onEnter: function(args) { var methodsPtr = ptr(args[2]); var methodCount = parseInt(args[3]); for (var i = 0; i < methodCount; i++) { var pSize = Process.pointerSize; /* https://android.googlesource.com/platform/libnativehelper/+/master/include_jni/jni.h#129 typedef struct { const char* name; const char* signature; void* fnPtr; } JNINativeMethod; */ var structSize = pSize * 3; // JNINativeMethod contains 3 pointers var namePtr = Memory.readPointer(methodsPtr.add(i * structSize)); var sigPtr = Memory.readPointer(methodsPtr.add(i * structSize + pSize)); var fnPtrPtr = Memory.readPointer(methodsPtr.add(i * structSize + (pSize * 2))); // output schema: className#methodName(arguments)returnVal@address console.log( // package & class, replacing forward slash with dot for convenience jclassAddress2NameMap[args[0]].replace(/\//g, '.') + '#' + Memory.readCString(namePtr) + // method Memory.readCString(sigPtr) + // signature (arguments & return type) '@' + fnPtrPtr // C side address ); } }, onLeave: function (ignoredReturnValue) {} }); break; case "_ZN3art3JNI9FindClassEP7_JNIEnvPKc": // art::JNI::FindClass Interceptor.attach(symbol.address, { onEnter: function(args) { if (args[1] != null) { jclassAddress2NameMap[args[0]] = Memory.readCString(args[1]); } }, onLeave: function (ignoredReturnValue) {} }); break; } }); fIntercepted = true; } Java.perform(revealNativeMethods);Output example
$ frida -Uf com.google.android.apps.photos --no-pause -l script.js{"class":"org/chromium/net/GURLUtils","method":"nativeGetOrigin","signature":"(Ljava/lang/String;)Ljava/lang/String;","address":"0x..da910"} ..def on_message(m, _data): if m['type'] == 'send': print(m['payload']) elif m['type'] == 'error': print(m) def switch(argument_key, idx): """ c/c++ variable type to javascript reader switch implementation # TODO handle other arguments, [long, longlong..] :param argument_key: variable type :param idx: index in symbols array :return: javascript to read the type of variable """ argument_key = argument_key.replace(' ', '') return '%d: %s' % (idx, { 'int': 'args[%d].toInt32(),', 'unsignedint': 'args[%d].toInt32(),', 'std::string': 'Memory.readUtf8String(Memory.readPointer(args[%d])),', 'bool': 'Boolean(args[%d]),' }[argument_key] % idx) def list_symbols_from_object_files(module_id): import subprocess return subprocess.getoutput('nm --demangle --dynamic %s' % module_id) def parse_nm_output(nm_stdout, symbols): for line in nm_stdout.splitlines(): split = line.split() open_parenthesis_idx = line.find('(') raw_arguments = [] if open_parenthesis_idx == -1 else line[open_parenthesis_idx + 1:-1] if len(raw_arguments) > 0: # ignore methods without arguments raw_argument_list = raw_arguments.split(',') symbols.append({ 'address': split[0], 'type': split[1], # @see Symbol Type Table 'name': split[2][:split[2].find('(')], # method name 'args': raw_argument_list }) def get_js_script(method, module_id): js_script = """ var moduleName = "{{moduleName}}", nativeFuncAddr = {{methodAddress}}; Interceptor.attach(Module.findExportByName(null, "dlopen"), { onEnter: function(args) { this.lib = Memory.readUtf8String(args[0]); console.log("[*] dlopen called with: " + this.lib); }, onLeave: function(retval) { if (this.lib.endsWith(moduleName)) { Interceptor.attach(Module.findBaseAddress(moduleName).add(nativeFuncAddr), { onEnter: function(args) { console.log("[*] hook invoked", JSON.stringify({{arguments}}, null, '\t')); } }); } } }); """ replace_map = { '{{moduleName}}': module_id, '{{methodAddress}}': '0x' + method['address'], '{{arguments}}': '{' + ''.join([switch(method['args'][i], i + 1) for i in range(len(method['args']))]) + '}' } for k, v in replace_map.items(): js_script = js_script.replace(k, v) print('[+] JS Script:\n', js_script) return js_script def main(app_id, module_id, method): """ $ python3.x+ script.py --method SomeClass::someMethod --app com.company.app --module libfoo.so :param app_id: application identifier / bundle id :param module_id: shared object identifier / known suffix, will iterate loaded modules (@see dlopen) :param method: method/symbol name :return: hook native method and print arguments when invoked """ # TODO extract all app's modules via `adb shell -c 'ls -lR /data/app/' + app_if + '*' | grep "\.so"` nm_stdout = list_symbols_from_object_files(module_id) symbols = [] parse_nm_output(nm_stdout, symbols) selection_idx = None for idx, symbol in enumerate(symbols): if method is None: # if --method flag is not passed print("%4d) %s (%d)" % (idx, symbol['name'], len(symbol['args']))) elif method == symbol['name']: selection_idx = idx break if selection_idx is None: if method is None: selection_idx = input("Enter symbol number: ") else: print('[+] Method not found, remove method flag to get list of methods to select from, `nm` stdout:') print(nm_stdout) exit(2) method = symbols[int(selection_idx)] print('[+] Selected method: %s' % method['name']) print('[+] Method arguments: %s' % method['args']) from frida import get_usb_device device = get_usb_device() pid = device.spawn([app_id]) session = device.attach(pid) script = session.create_script(get_js_script(method, module_id)) script.on('message', on_message) script.load() device.resume(app_id) # keep hook alive from sys import stdin stdin.read() if __name__ == '__main__': from argparse import ArgumentParser parser = ArgumentParser() parser.add_argument('--app', help='app identifier "com.company.app"') parser.add_argument('--module', help='loaded module name "libfoo.2.so"') parser.add_argument('--method', help='method name "SomeClass::someMethod", if empty it will print select-list') args = parser.parse_args() main(args.app, args.module, args.method)Symbol Type Table
"A" The symbol's value is absolute, and will not be changed by further linking. "B" The symbol is in the uninitialized data section (known as BSS). "C" The symbol is common. Common symbols are uninitialized data. When linking, multiple common symbols may appear with the same name. If the symbol is defined anywhere, the common symbols are treated as undefined references. "D" The symbol is in the initialized data section. "G" The symbol is in an initialized data section for small objects. Some object file formats permit more efficient access to small data objects, such as a global int variable as opposed to a large global array. "I" The symbol is an indirect reference to another symbol. This is a GNU extension to the a.out object file format which is rarely used. "N" The symbol is a debugging symbol. "R" The symbol is in a read only data section. "S" The symbol is in an uninitialized data section for small objects. "T" The symbol is in the text (code) section. "U" The symbol is undefined. "V" The symbol is a weak object. When a weak defined symbol is linked with a normal defined symbol, the normal defined symbol is used with no error. When a weak undefined symbol is linked and the symbol is not defined, the value of the weak symbol becomes zero with no error. "W" The symbol is a weak symbol that has not been specifically tagged as a weak object symbol. When a weak defined symbol is linked with a normal defined symbol, the normal defined symbol is used with no error. When a weak undefined symbol is linked and the symbol is not defined, the value of the symbol is determined in a system-specific manner without error. On some systems, uppercase indicates that a default value has been specified. "-" The symbol is a stabs symbol in an a.out object file. In this case, the next values printed are the stabs other field, the stabs desc field, and the stab type. Stabs symbols are used to hold debugging information. "?" The symbol type is unknown, or object file format specific.
And save to a file named pkg.classes
$ frida -U com.pkg -qe 'Java.perform(function(){Java.enumerateLoadedClasses({"onMatch":function(c){console.log(c);}});});' -o pkg.classesOutput example
TODOGet class methods & members.
Object.getOwnPropertyNames(Java.use('com.company.CustomClass').__proto__).join('\n\t')If there is a name collision, method & member has the same name, an underscore will be added to member. source
let fieldJsName = env.stringFromJni(fieldName); while (jsMethods.hasOwnProperty(fieldJsName)) { fieldJsName = '_' + fieldJsName; }Output example
TODOIt will turn WiFi off on the creation of the first Acivity.
var WifiManager = Java.use("android.net.wifi.WifiManager"); Java.use("android.app.Activity").onCreate.overload("android.os.Bundle").implementation = function(bundle) { var wManager = Java.cast(this.getSystemService("wifi"), WifiManager); console.log('isWifiEnabled ?', wManager.isWifiEnabled()); wManager.setWifiEnabled(false); this.$init(bundle); }Output example
TODOIt will set a system-wide proxy using the supplied IP address and port.
var ActivityThread = Java.use('android.app.ActivityThread'); var ConnectivityManager = Java.use('android.net.ConnectivityManager'); var ProxyInfo = Java.use('android.net.ProxyInfo'); var proxyInfo = ProxyInfo.$new('192.168.1.10', 8080, ''); // change to null in order to disable the proxy. var context = ActivityThread.currentApplication().getApplicationContext(); var connectivityManager = Java.cast(context.getSystemService('connectivity'), ConnectivityManager); connectivityManager.setGlobalProxy(proxyInfo);Output example
TODOCan also hook & change IMEI.
function getIMEI(){ console.log('IMEI =', Java.use("android.telephony.TelephonyManager").$new().getDeviceId()); } Java.perform(getIMEI)Output example
TODOHook InputputStream & print buffer as ascii with char limit & exclude list.
function binaryToHexToAscii(array, readLimit) { var result = []; // read 100 bytes #performance readLimit = readLimit || 100; for (var i = 0; i < readLimit; ++i) { result.push(String.fromCharCode( // hex2ascii part parseInt( ('0' + (array[i] & 0xFF).toString(16)).slice(-2), // binary2hex part 16 ) )); } return result.join(''); } function hookInputStream() { Java.use('java.io.InputStream')['read'].overload('[B').implementation = function(b) { // execute original and save return value var retval = this.read(b); var resp = binaryToHexToAscii(b); // conditions to not print garbage packets var reExcludeList = new RegExp(['Mmm'/*, 'Ping' /*, ' Yo'*/].join('|')); if ( ! reExcludeList.test(resp) ) { console.log(resp); } var reIncludeList = new RegExp(['AAA', 'BBB', 'CCC'].join('|')); if ( reIncludeList.test(resp) ) { send( binaryToHexToAscii(b, 1200) ); } return retval; }; } Java.perform(hookInputStream);Output example
TODO// 0 = // https://developer.android.com/reference/android/widget/Toast#LENGTH_LONG Java.scheduleOnMainThread(() => { Java.use("android.widget.Toast") .makeText(Java.use("android.app.ActivityThread").currentApplication().getApplicationContext(), Java.use("java.lang.StringBuilder").$new("Text to Toast here"), 0).show(); });Output example
TODO[⬆ Back to top](#table-of-contents)
Await until specific DLL will load in Unity app, can implement hot swap.
var awaitForCondition = function(callback) { var int = setInterval(function() { if (Module.findExportByName(null, "mono_get_root_domain")) { clearInterval(int); callback(); return; } }, 0); } function hook() { Interceptor.attach(Module.findExportByName(null, "mono_assembly_load_from_full"), { onEnter: function(args) { this._dll = Memory.readUtf8String(ptr(args[1])); console.log('[*]', this._dll); }, onLeave: function(retval) { if (this._dll.endsWith("Assembly-CSharp.dll")) { console.log(JSON.stringify({ retval: retval, name: this._dll }, null, 2)); } } }); } Java.perform(awaitForCondition(hook));Output example
TODOLog whenever WebView switch URL.
Java.use("android.webkit.WebView").loadUrl.overload("java.lang.String").implementation = function (s) { send(s.toString()); this.loadUrl.overload("java.lang.String").call(this, s); };Output example
TODOHoooking toString of StringBuilder/Buffer & printing stacktrace.
Java.perform(function() { ['java.lang.StringBuilder', 'java.lang.StringBuffer'].forEach(function(clazz, i) { console.log('[?] ' + i + ' = ' + clazz); var func = 'toString'; Java.use(clazz)[func].implementation = function() { var ret = this[func](); if (ret.indexOf('') != -1) { // print stacktrace if return value contains specific string Java.perform(function() { var jAndroidLog = Java.use("android.util.Log"), jException = Java.use("java.lang.Exception"); console.log( jAndroidLog.getStackTraceString( jException.$new() ) ); }); } send('[' + i + '] ' + ret); return ret; } }); });Output example
TODOJava.perform(function() { var shared_pref_class = Java.use('android.app.SharedPreferencesImpl$EditorImpl'); shared_pref_class.putString.overload('java.lang.String', 'java.lang.String').implementation = function(k, v) { console.log('Shared preference updated: ', k, '=', v); return this.putString(k, v); } shared_pref_class.putInt.overload('java.lang.String', 'int').implementation = function(k, v) { console.log('Shared preference updated: ', k, '=', v); return this.putInt(k, v); } shared_pref_class.putFloat.overload('java.lang.String', 'float').implementation = function(k, v) { console.log('Shared preference updated: ', k, '=', v); return this.putFloat(k, v); } shared_pref_class.putBoolean.overload('java.lang.String', 'boolean').implementation = function(k, v) { console.log('Shared preference updated: ', k, '=', v); return this.putBoolean(k, v); } shared_pref_class.putLong.overload('java.lang.String', 'long').implementation = function(k, v) { console.log('Shared preference updated: ', k, '=', v); return this.putLong(k, v); } shared_pref_class.putStringSet.overload('java.lang.String', java.util.Set).implementation = function(k, v) { console.log('Shared preference updated: ', k, '=', v); return this.putStringSet(k, v); } });Output example
TODOJava.perform(function() { var str = Java.use('java.lang.String'), objectClass = 'java.lang.Object'; str.equals.overload(objectClass).implementation = function(obj) { var response = str.equals.overload(objectClass).call(this, obj); if (obj) { if (obj.toString().length > 5) { send(str.toString.call(this) + ' == ' + obj.toString() + ' ? ' + response); } } return response; } });Output example
TODOHook native method by module name and method address and print arguments.
var moduleName = "libfoo.so"; var nativeFuncAddr = 0x1234; // $ nm --demangle --dynamic libfoo.so | grep "Class::method(" Interceptor.attach(Module.findExportByName(null, "dlopen"), { onEnter: function(args) { this.lib = Memory.readUtf8String(args[0]); console.log("dlopen called with: " + this.lib); }, onLeave: function(retval) { if (this.lib.endsWith(moduleName)) { console.log("ret: " + retval); var baseAddr = Module.findBaseAddress(moduleName); Interceptor.attach(baseAddr.add(nativeFuncAddr), { onEnter: function(args) { console.log("[-] hook invoked"); console.log(JSON.stringify({ a1: args[1].toInt32(), a2: Memory.readUtf8String(Memory.readPointer(args[2])), a3: Boolean(args[3]) }, null, '\t')); } }); } } });Output example
TODOJava.use('java.lang.StringBuilder').$init.overload('java.lang.String').implementation = function(stringArgument) { console.log("c'tor"); return this.$init(stringArgument); };Output example
TODOjava.lang.reflect.Method#invoke(Object obj, Object... args, boolean bool)
Java.use('java.lang.reflect.Method').invoke.overload('java.lang.Object', '[Ljava.lang.Object;', 'boolean').implementation = function(a,b,c) { console.log('hooked!', a, b, c); return this.invoke(a,b,c); };Output example
TODOTracing class method, with pretty colors and options to print as JSON & stacktrace.
TODO add trace for c'tor.
var Color = { RESET: "\x1b[39;49;00m", Black: "0;01", Blue: "4;01", Cyan: "6;01", Gray: "7;11", Green: "2;01", Purple: "5;01", Red: "1;01", Yellow: "3;01", Light: { Black: "0;11", Blue: "4;11", Cyan: "6;11", Gray: "7;01", Green: "2;11", Purple: "5;11", Red: "1;11", Yellow: "3;11" } }; /** * * @param input. * If an object is passed it will print as json * @param kwargs options map { * -l level: string; log/warn/error * -i indent: boolean; print JSON prettify * -c color: @see ColorMap * } */ var LOG = function (input, kwargs) { kwargs = kwargs || {}; var logLevel = kwargs['l'] || 'log', colorPrefix = '\x1b[3', colorSuffix = 'm'; if (typeof input === 'object') input = JSON.stringify(input, null, kwargs['i'] ? 2 : null); if (kwargs['c']) input = colorPrefix + kwargs['c'] + colorSuffix + input + Color.RESET; console[logLevel](input); }; var printBacktrace = function () { Java.perform(function() { var android_util_Log = Java.use('android.util.Log'), java_lang_Exception = Java.use('java.lang.Exception'); // getting stacktrace by throwing an exception LOG(android_util_Log.getStackTraceString(java_lang_Exception.$new()), { c: Color.Gray }); }); }; function traceClass(targetClass) { var hook; try { hook = Java.use(targetClass); } catch (e) { console.error("trace class failed", e); return; } var methods = hook.class.getDeclaredMethods(); hook.$dispose(); var parsedMethods = []; methods.forEach(function (method) { var methodStr = method.toString(); var methodReplace = methodStr.replace(targetClass + ".", "TOKEN").match(/\sTOKEN(.*)\(/)[1]; parsedMethods.push(methodReplace); }); uniqBy(parsedMethods, JSON.stringify).forEach(function (targetMethod) { traceMethod(targetClass + '.' + targetMethod); }); } function traceMethod(targetClassMethod) { try { var delim = targetClassMethod.lastIndexOf('.'); if (delim === -1) return; var targetClass = targetClassMethod.slice(0, delim); var targetMethod = targetClassMethod.slice(delim + 1, targetClassMethod.length); var hook = Java.use(targetClass); var overloadCount = hook[targetMethod].overloads.length; LOG({ tracing: targetClassMethod, overloaded: overloadCount }, { c: Color.Green }); for (var i = 0; i < overloadCount; i++) { hook[targetMethod].overloads[i].implementation = function () { var log = { '#': targetClassMethod, args: [] }; for (var j = 0; j < arguments.length; j++) { var arg = arguments[j]; // quick&dirty fix for java.io.StringWriter char[].toString() impl because frida prints [object Object] if (j === 0 && arguments[j]) { if (arguments[j].toString() === '[object Object]') { var s = []; for (var k = 0, l = arguments[j].length; k < l; k++) { s.push(arguments[j][k]); } arg = s.join(''); } } log.args.push({ i: j, o: arg, s: arg ? arg.toString(): 'null'}); } var retval; try { retval = this[targetMethod].apply(this, arguments); // might crash (Frida bug?) log.returns = { val: retval, str: retval ? retval.toString() : null }; } catch (e) { console.error(e); } LOG(log, { c: Color.Blue }); return retval; } } } catch(error) { LOG({ tracing: targetClassMethod, "overloaded": 0}, { c: Color.Red }); } } // remove duplicates from array function uniqBy(array, key) { var seen = {}; return array.filter(function (item) { var k = key(item); return seen.hasOwnProperty(k) ? false : (seen[k] = true); }); } var Main = function() { Java.perform(function () { // avoid java.lang.ClassNotFoundException [ // "java.io.File", 'java.net.Socket' ].forEach(traceClass); Java.use('java.net.Socket').isConnected.overload().implementation = function () { LOG('Socket.isConnected.overload', { c: Color.Light.Cyan }); printBacktrace(); return true; } }); }; Java.perform(Main); Output example
TODOThe ANDROID_ID is unique in each application in Android.
function getContext() { return Java.use('android.app.ActivityThread').currentApplication().getApplicationContext().getContentResolver(); } function logAndroidId() { console.log('[-]', Java.use('android.provider.Settings$Secure').getString(getContext(), 'android_id')); }Output example
https://stackoverflow.com/a/54818023/2655092Java.perform(() => { var Location = Java.use('android.location.Location'); Location.getLatitude.implementation = function() { return LATITUDE; } Location.getLongitude.implementation = function() { return LONGITUDE; } })Output example
TODOBypass screenshot prevention stackoverflow question
Java.perform(function() { Java.use('android.view.SurfaceView').setSecure.overload('boolean').implementation = function(flag){ console.log('[1] flag:', flag); this.call(false); }; var LayoutParams = Java.use('android.view.WindowManager$LayoutParams'); Java.use('android.view.ViewWindow').setFlags.overload('int', 'int').implementation = function(flags, mask){ console.log('flag secure: ', LayoutParams.FLAG_SECURE.value); console.log('before:', flags); flags = (flags.value & ~LayoutParams.FLAG_SECURE.value); console.log('after:', flags); this.call(this, flags, mask); }; });Output example
https://stackoverflow.com/a/54818023/2655092function notifyNewSharedPreference() { Java.use('android.app.SharedPreferencesImpl$EditorImpl').putString.overload('java.lang.String', 'java.lang.String').implementation = function(k, v) { console.log('[SharedPreferencesImpl]', k, '=', v); return this.putString(k, v); } }Output example
TODOfunction hookOverloads(className, func) { var clazz = Java.use(className); var overloads = clazz[func].overloads; for (var i in overloads) { if (overloads[i].hasOwnProperty('argumentTypes') || overloads[i]['argumentTypes'] != undefined) { var parameters = []; var curArgumentTypes = overloads[i].argumentTypes, args = [], argLog = '['; for (var j in curArgumentTypes) { var cName = curArgumentTypes[j].className; parameters.push(cName); argLog += "'(" + cName + ") ' + v" + j + ","; args.push('v' + j); } argLog += ']'; var script = "var ret = this." + func + '(' + args.join(',') + ") || '';\n" + "console.log(JSON.stringify(" + argLog + "));\n" + "return ret;" args.push(script); clazz[func].overload.apply(this, parameters).implementation = Function.apply(null, args); } } } Java.perform(function() { hookOverloads('java.lang.StringBuilder', '$init'); })Output example
TODOJava.perform(() => { const MyBroadcastReceiver = Java.registerClass({ name: 'MyBroadcastReceiver', superClass: Java.use('android.content.BroadcastReceiver'), methods: { onReceive: [{ returnType: 'void', argumentTypes: ['android.content.Context', 'android.content.Intent'], implementation: function(context, intent) { // .. } }] }, }); let ctx = Java.use('android.app.ActivityThread').currentApplication().getApplicationContext(); ctx.registerReceiver(MyBroadcastReceiver.$new(), Java.use('android.content.IntentFilter').$new('com.example.JAVA_TO_AGENT')); });Output example
TODOfunction listClassesImplementsInterface(aInterface) { let classLoaders = Java.enumerateClassLoadersSync() Java.enumerateLoadedClassesSync().forEach(className => { for (let i = 0; i < classLoaders.length; i++) { let classLoader = classLoaders[i] Java.classFactory.loader = classLoader try { let jclass = Java.use(className).class let ifaces = jclass.getInterfaces().toString() jclass = null if (ifaces.indexOf(aInterface) != -1) { console.log(JSON.stringify({ name: className, loader: classLoader.toString(), interfaces: ifaces })) break // we found one ClassLoader, that's enough } } catch (e) { // continue to next ClassLoader } } }) }Java.perform(() => { var customSensorEventListener = null; var curSteps = 0; var totalNumberOfRequiredSteps = 10000; function incSteps() { Java.perform(() => { var sEvent = Java.use('android.hardware.SensorEvent').$new(1); sEvent.values.values = Java.array('float', [curSteps]); // https://developer.android.com/reference/android/hardware/SensorEvent#values sEvent.timestamp = Java.use('java.lang.Long').$new(Java.use('java.lang.System').nanoTime()); sEvent.accuracy = Java.use('java.lang.Integer').$new(3); // https://developer.android.com/reference/android/hardware/SensorManager#SENSOR_STATUS_ACCURACY_HIGH customSensorEventListener.onSensorChanged(sEvent); if (curSteps < totalNumberOfRequiredSteps) { setTimeout(() => { curSteps += 50; incSteps(); }, 1500) } }); } Java.choose('.CustomSensorEventListener', { // class that implements SensorEventListener onMatch: function (instance) { customSensorEventListener = instance; }, onComplete: function () { incSteps(); } }); });Output example
TODOvar m = 'libsystem_trace.dylib'; // bool os_log_type_enabled(os_log_t oslog, os_log_type_t type); var isEnabledFunc = Module.findExportByName(m, 'os_log_type_enabled'); // _os_log_impl(void *dso, os_log_t log, os_log_type_t type, const char *format, uint8_t *buf, unsigned int size); var logFunc = Module.findExportByName(m, '_os_log_impl'); // Enable all logs Interceptor.attach(isEnabledFunc, { onLeave: function (ret) { ret.replace(0x1); } }); Interceptor.attach(logFunc, { onEnter: function (a) { /* OS_ENUM(os_log_type, uint8_t, OS_LOG_TYPE_DEFAULT = 0x00, OS_LOG_TYPE_INFO = 0x01, OS_LOG_TYPE_DEBUG = 0x02, OS_LOG_TYPE_ERROR = 0x10, OS_LOG_TYPE_FAULT = 0x11); */ var type = a[2]; var format = a[3]; if (type !== 0x2) { console.log(JSON.stringify({ type: type, format: format.readCString(), //buf: a[4].readPointer().readCString() // TODO }, null, 2)); } } })Output example
TODOvar UIAlertController = ObjC.classes.UIAlertController; var UIAlertAction = ObjC.classes.UIAlertAction; var UIApplication = ObjC.classes.UIApplication; var handler = new ObjC.Block({ retType: 'void', argTypes: ['object'], implementation: function () {} }); ObjC.schedule(ObjC.mainQueue, function () { var alert = UIAlertController.alertControllerWithTitle_message_preferredStyle_('Frida', 'Hello from Frida', 1); var defaultAction = UIAlertAction.actionWithTitle_style_handler_('OK', 0, handler); alert.addAction_(defaultAction); // Instead of using `ObjC.choose()` and looking for UIViewController instances on the heap, we have direct access through UIApplication: UIApplication.sharedApplication().keyWindow().rootViewController().presentViewController_animated_completion_(alert, true, NULL); })Output example
TODOLog each file open
Interceptor.attach(ObjC.classes.NSFileManager['- fileExistsAtPath:'].implementation, { onEnter: function (args) { console.log('open' , ObjC.Object(args[2]).toString()); } });Output example
TODOfunction observeClass(name) { var k = ObjC.classes[name]; k.$ownMethods.forEach(function(m) { var impl = k[m].implementation; console.log('Observing ' + name + ' ' + m); Interceptor.attach(impl, { onEnter: function(a) { this.log = []; this.log.push('(' + a[0] + ',' + Memory.readUtf8String(a[1]) + ') ' + name + ' ' + m); if (m.indexOf(':') !== -1) { var params = m.split(':'); params[0] = params[0].split(' ')[1]; for (var i = 0; i < params.length - 1; i++) { try { this.log.push(params[i] + ': ' + new ObjC.Object(a[2 + i]).toString()); } catch (e) { this.log.push(params[i] + ': ' + a[2 + i].toString()); } } } this.log.push( Thread.backtrace(this.context, Backtracer.ACCURATE) .map(DebugSymbol.fromAddress) .join('\n') ); }, onLeave: function(r) { try { this.log.push('RET: ' + new ObjC.Object(r).toString()); } catch (e) { this.log.push('RET: ' + r.toString()); } console.log(this.log.join('\n') + '\n'); } }); }); }Output example
observeClass('Someclass$innerClass');
Observing Someclass$innerClass - func Observing Someclass$innerClass - empty (0x174670040,parameterName) Someclass$innerClass - func 0x10048dd6c libfoo!0x3bdd6c 0x1005a5dd0 libfoo!0x4d5dd0 0x1832151c0 libdispatch.dylib!_dispatch_client_callout 0x183215fb4 libdispatch.dylib!dispatch_once_f RET: 0xabcdef Get UUID for specific path when attached to an app by reading plist file under each app container.
var PLACEHOLDER = '{UUID}'; function extractUUIDfromPath(path) { var bundleIdentifier = String(ObjC.classes.NSBundle.mainBundle().objectForInfoDictionaryKey_('CFBundleIdentifier')); var path_prefix = path.substr(0, path.indexOf(PLACEHOLDER)); var plist_metadata = '/.com.apple.mobile_container_manager.metadata.plist'; var errorPtr = Memory.alloc(Process.pointerSize); Memory.writePointer(errorPtr, NULL); var folders = ObjC.classes.NSFileManager.defaultManager().contentsOfDirectoryAtPath_error_(path_prefix, errorPtr); var error = Memory.readPointer(errorPtr); if (errorPtr) console.error( new ObjC.Object( error ) ); for (var i = 0, l = folders.count(); i < l; i++) { var uuid = folders.objectAtIndex_(i); var metadata = path_prefix + uuid + plist_metadata; var dict = ObjC.classes.NSMutableDictionary.alloc().initWithContentsOfFile_(metadata); var enumerator = dict.keyEnumerator(); var key; while ((key = enumerator.nextObject()) !== null) { if (key == 'MCMMetadataIdentifier') { var appId = String(dict.objectForKey_(key)); if (appId.indexOf(bundleIdentifier) != -1) { return path.replace(PLACEHOLDER, uuid); } } } } } console.log( extractUUIDfromPath('/var/mobile/Containers/Data/Application/' + PLACEHOLDER + '/Documents') );Output example
TODOvar cookieJar = {}; var cookies = ObjC.classes.NSHTTPCookieStorage.sharedHTTPCookieStorage().cookies(); for (var i = 0, l = cookies.count(); i < l; i++) { var cookie = cookies['- objectAtIndex:'](i); cookieJar[cookie.Name()] = cookie.Value().toString(); // ["- expiresDate"]().toString() } console.log(JSON.stringify(cookieJar, null, 2));Output example
```js { "key1": "value 1", "key2": "value 2" } ```Print map of members (with values) for each class instance
ObjC.choose(ObjC.classes[clazz], { onMatch: function (obj) { console.log('onMatch: ', obj); Object.keys(obj.$ivars).forEach(function(v) { console.log('\t', v, '=', obj.$ivars[v]); }); }, onComplete: function () { console.log('onComplete', arguments.length); } });Output example
TODOObject.keys(ObjC.classes) will list all available Objective C classes, but actually this will return all classes loaded in current process, including system frameworks. If we want something like weak_classdump, to list classes from executable it self only, Objective C runtime already provides such function objc_copyClassNamesForImage
var objc_copyClassNamesForImage = new NativeFunction( Module.findExportByName(null, 'objc_copyClassNamesForImage'), 'pointer', ['pointer', 'pointer'] ); var free = new NativeFunction(Module.findExportByName(null, 'free'), 'void', ['pointer']); var classes = new Array(count); var p = Memory.alloc(Process.pointerSize); Memory.writeUInt(p, 0); var path = ObjC.classes.NSBundle.mainBundle().executablePath().UTF8String(); var pPath = Memory.allocUtf8String(path); var pClasses = objc_copyClassNamesForImage(pPath, p); var count = Memory.readUInt(p); for (var i = 0; i < count; i++) { var pClassName = Memory.readPointer(pClasses.add(i * Process.pointerSize)); classes[i] = Memory.readUtf8String(pClassName); } free(pClasses); var tree = {}; classes.forEach(function(name) { var clazz = ObjC.classes[name]; var chain = [name]; while (clazz = clazz.$superClass) { chain.unshift(clazz.$className); } var node = tree; chain.forEach(function(clazz) { node[clazz] = node[clazz] || {}; node = node[clazz]; }); }); send(tree);Output example
TODOHooking objc_msgSend
import frida, sys f = open('/tmp/log', 'w') def on_message(msg, _data): f.write(msg['payload']+'\n') frida_script = """ Interceptor.attach(Module.findExportByName('/usr/lib/libobjc.A.dylib', 'objc_msgSend'), { onEnter: function(args) { var m = Memory.readCString(args[1]); if (m != 'length' && !m.startsWith('_fastC')) send(m); } }); """ device = frida.get_usb_device() pid = device.spawn(["com.example"]) # or .get_frontmost_application() session = device.attach(pid) script = session.create_script(frida_script) script.on('message', on_message) script.load() device.resume(pid) sys.stdin.read()$ sort /tmp/log | uniq -c | sort -nOutput example
TODOTo reduce UI related functions I ues the following steps:
- Output log to a file using
-o /tmp/log1 - Copy MRU to excludesList using
$ sort /tmp/log1 | uniq -c | sort -rn | head -n20 | cut -d# -f2 | paste -sd "," -
var mName = 'MyModule', excludeList = ['Alot', 'Of', 'UI', 'Related', 'Functions']; Module.enumerateExportsSync(mName) .filter(function(e) { var fromTypeFunction = e.type == 'function';· var notInExcludes = excludeList.indexOf(e.name) == -1; return fromTypeFunction && notInExcludes; }) .forEach(function(e) { Interceptor.attach(Module.findExportByName(mName, e.name), { onEnter: function(args) { console.log(mName + "#'" + e.name + "'"); } }) })Output example
TODOProcess.enumerateRanges('rw-', { onMatch: function (range) { var fname = `/sdcard/${range.base}_dump`; var f = new File(fname, 'wb'); f.write(instance.base.readByteArray(instance.size)); f.flush(); f.close(); console.log(`base=${range.base} size=${range.size} prot=${range.protection} fname=${fname}`); }, onComplete: function () {} });Output example
TODOfunction memscan(str) { Process.enumerateModulesSync().filter(m => m.path.startsWith('/data')).forEach(m => { var pattern = str.split('').map(letter => letter.charCodeAt(0).toString(16)).join(' '); try { var res = Memory.scanSync(m.base, m.size, pattern); if (res.length > 0) console.log(JSON.stringify({m, res})); } catch (e) { console.warn(e); } }); }var memscn = function (str) { Process.enumerateModulesSync().forEach(function (m) { var pattern = str.split('').map(function (l) { return l.charCodeAt(0).toString(16) }).join(' '); try { var res = Memory.scanSync(m.base, m.size, pattern); if (res.length > 0) console.log(JSON.stringify({m, res}, null , 2)); } catch (e) { console.warn(e); } }); }Output example
pattern [ 52 41 4e 44 4f 4d ] { "name": "Test", "base": "0x1048fc000", "size": 147000, "path": "/var/containers/Bundle/Application/CD74EB00-9D90-4600-BF5D-F6E5E0CDF878/Test.app/Test" } [{"address":"0x10491f211","size":6}] var _module = Process.findModuleByName('myModule'); var base = ptr(_module.base); var startTraceOffset = 0xabcd1234, numInstructionsToTrace = 50; var startTrace = base.add(startTraceOffset), endTrace = startTrace.add(4 * (numInstructionsToTrace - 1)); Interceptor.attach(ObjC.classes.CustomClass['- func'].implementation, { onEnter: function (args) { var tid = Process.getCurrentThreadId(); this.tid = tid; console.warn(`onEnter [ ${tid} ]`); Stalker.follow(tid, { transform: function (iterator) { var instruction; while ((instruction = iterator.next()) !== null) { // condition to putCallout if (instruction.address <= endTrace && instruction.address >= startTrace) { // print instruction & registers values iterator.putCallout(function(context) { var offset = ptr(context.pc).sub(base); var inst = Instruction.parse(context.pc).toString(); var modified_inst = inst; inst.replace(/,/g, '').split(' ').forEach(op => { if (op.startsWith('x')) modified_inst = modified_inst.replace(op, context[op]); else if (op.startsWith('w')) modified_inst = modified_inst.replace(op, context[op.replace('w', 'x')]); }); modified_inst = '\x1b[35;01m' + modified_inst + '\x1b[0m'; console.log(`x8=${context.x8} x25=${context.x25} x0=${context.x0} x21=${context.x21}`) console.log(`${offset} ${inst} # ${modified_inst}`); }); } iterator.keep(); } } }) }, onLeave: function (retval) { console.log(`onLeave [ ${this.tid} ]`); // cleanup Stalker.unfollow(this.tid); Stalker.garbageCollect(); } }) Output example
mul x5, x2, x21 # mul 0x3, 0x4, 0x5$ npm i frida-compile demangler-js -gadd to your script
const demangle = require('demangler-js').demangle; ... Module.enumerateExportsSync('library.so') .filter(x => x.name.startsWith('_Z')) .forEach(x => { Interceptor.attach(x.address, { onEnter: function (args) { console.log('[-] ' + demangle(x.name)); } }); });compile
$ frida-compile script.js -o out.jsrun
$ frida -Uf com.app -l out.jsOutput example
TODOSet hooks before DT_INIT_ARRAY ( source )
let base; let do_dlopen = null; let call_ctor = null; const target_lib_name = 'targetlib.so'; Process.findModuleByName('linker64').enumerateSymbols().forEach(sym => { if (sym.name.indexOf('do_dlopen') >= 0) { do_dlopen = sym.address; } else if (sym.name.indexOf('call_constructor') >= 0) { call_ctor = sym.address; } }) Interceptor.attach(do_dlopen, function (args) { if (args[0].readUtf8String().indexOf(target_lib_name) >= 0) { Interceptor.attach(call_ctor, function () { const module = Process.findModuleByName(target_lib_name); base = module.base; console.log('loading', target_lib_name, '- base @', base); // DoStuff }) } })Credit: iGio90
Output example
TODOExample of quick&dirty iOS device properties extraction
var UIDevice = ObjC.classes.UIDevice.currentDevice(); UIDevice.$ownMethods .filter(function(method) { return method.indexOf(':') == -1 /* filter out methods with parameters */ && method.indexOf('+') == -1 /* filter out public methods */ }) .forEach(function(method) { console.log(method, ':', UIDevice[method]()) }) console.log('executablePath =', ObjC.classes.NSBundle.mainBundle().executablePath().toString());if (ObjC.available) { var processInfo = ObjC.classes.NSProcessInfo.processInfo(); var versionString = processInfo.operatingSystemVersionString().toString(); // E.g. "Version 13.5 (Build 17F75)" var ver = versionString.split(' '); var version = ver[1]; // E.g. 13.5 console.log("iOS version: " + version); }Output example
- adjTrackingEnabled : true - adjFbAttributionId : - adjVendorId : 4AAAAAAA-CECC-4BBB-BDDD-DEEEEEEEED18 - adjDeviceType : iPhone - adjDeviceName : iPhone8,2 - adjCreateUuid : dfaaaa2-ebbd-4ccc-addd-eaeeeeeeee7c - adjIdForAdvertisers : 7AAAAA3A-4BBB-4CCC-BDDD-0EEEEEEEE8A6 - sbf_bannerGraphicsQuality : 100 - sbf_controlCenterGraphicsQuality : 100 - sbf_homeScreenFolderGraphicsQuality : 100 - sbf_searchTransitionGraphicsQuality : 100 - sbf_dashBoardPresentationGraphicsQuality : 100 - sbf_homeScreenBlurGraphicsQuality : 100 - userInterfaceIdiom : 0 - _supportsDeepColor : false - name : iPhone - _keyboardGraphicsQuality : 100 - isGeneratingDeviceOrientationNotifications : true - orientation : 1 - _backlightLevel : 1 - isProximityMonitoringEnabled : false - systemVersion : 11.1.1 - _graphicsQuality : 100 - beginGeneratingDeviceOrientationNotifications : undefined - endGeneratingDeviceOrientationNotifications : undefined - buildVersion : 15C222 - systemName : iOS - _isSystemSoundEnabled : true - _feedbackSupportLevel : 1 - model : iPhone - _supportsForceTouch : true - localizedModel : iPhone - identifierForVendor : 4A7B44DB-AAAA-BBB-CCC-D8819581DDD - isBatteryMonitoringEnabled : false - batteryState : 0 - batteryLevel : -1 - proximityState : false - isMultitaskingSupported : true - playInputClick : undefined - _softwareDimmingAlpha : 0 - _playInputSelectSound : undefined - _playInputDeleteSound : undefined - _hasGraphicsQualityOverride : false - _hasTouchPad : false - _clearGraphicsQualityOverride : undefined - _predictionGraphicsQuality : 100 - _nativeScreenGamut : 0 - _tapticEngine : <_UITapticEngine: 0x1c06257c0> function screenshot() { ObjC.schedule(ObjC.mainQueue, function() { var getNativeFunction = function (ex, retVal, args) { return new NativeFunction(Module.findExportByName('UIKit', ex), retVal, args); }; var api = { UIWindow: ObjC.classes.UIWindow, UIGraphicsBeginImageContextWithOptions: getNativeFunction('UIGraphicsBeginImageContextWithOptions', 'void', [['double', 'double'], 'bool', 'double']), UIGraphicsBeginImageContextWithOptions: getNativeFunction('UIGraphicsBeginImageContextWithOptions', 'void', [['double', 'double'], 'bool', 'double']), UIGraphicsEndImageContext: getNativeFunction('UIGraphicsEndImageContext', 'void', []), UIGraphicsGetImageFromCurrentImageContext: getNativeFunction('UIGraphicsGetImageFromCurrentImageContext', 'pointer', []), UIImagePNGRepresentation: getNativeFunction('UIImagePNGRepresentation', 'pointer', ['pointer']) }; var view = api.UIWindow.keyWindow(); var bounds = view.bounds(); var size = bounds[1]; api.UIGraphicsBeginImageContextWithOptions(size, 0, 0); view.drawViewHierarchyInRect_afterScreenUpdates_(bounds, true); var image = api.UIGraphicsGetImageFromCurrentImageContext(); api.UIGraphicsEndImageContext(); var png = new ObjC.Object(api.UIImagePNGRepresentation(image)); send('screenshot', Memory.readByteArray(png.bytes(), png.length())); }); } rpc.exports = { takescreenshot: screenshot }... def save_screenshot(d): f = open('/tmp/screenshot.png', 'wb') f.write(d) f.close() def on_message(msg, data): save_screenshot(data) script.exports.takescreenshot() # open screenshot & invoke rpc via input # <Ctrl+C> will take screenshot, open it with eog & wait for export function name to invoke via input def on_message(msg, data): if 'payload' in msg: if msg['payload'] == 'screenshot': i = '/tmp/screenshot.png' f = open(i, 'wb') f.write(data) f.close() subprocess.call(['eog', i]) while True: try: time.sleep(1) except KeyboardInterrupt: script.exports.takescreenshot() try: getattr(script.exports, input())() except (KeyboardInterrupt, frida.core.RPCException) as e: print('[!]', e)Output example
TODOInterceptor.attach(ObjC.classes.NMSSHChannel['- execute:error:timeout:'].implementation, { onEnter: function(args) { this.cmd = ObjC.Object(args[2]).toString(); this.timeout = args[4]; }, onLeave: function(retv) { console.log(`CMD: ${ObjC.Object(args[2]).toString()} Timeout: ${args[4]} Ret: ${retv}`); } }); 
