Developed as part of my internship with Codec Technologies, the Custom Ransomware Simulation is a project designed to demonstrate ransomware-like behavior in a safe sandbox.
It showcases how ransomware encrypts and decrypts files, with proper logging and key handling, without putting real system files at risk.

• 🔑 Key Generation – Secure random key creation saved in key.key
• 🔒 File Encryption – Encrypts sandbox files with AES-256
• 🔓 File Decryption – Decrypt files using the same key
• 🗂️ Sandbox Environment – Works only on test files (no risk to your system)
• 📜 Logging – Tracks every action in simulation.log
• 🧪 Unit Tests – Includes test cases for safe verification

• Python 3.8+
• Virtual environment recommended

# Clone and setup git clone https://github.com/CodeWithTanim/Custom-Ransomware-Simulation.git cd Custom-Ransomware-Simulation python -m venv venv venv\Scripts\activate # Windows source venv/bin/activate # Linux/macOS # Install requirements pip install -r requirements.txt # Run the app python src/main.py

Custom-Ransomware-Simulation/ │ ├── README.md ← Project documentation ├── requirements.txt ← Python dependencies │ ├── docs/ ← Documentation & Screenshots │ ├── project_overview.md │ ├── encryption_demo.md │ └── screenshots/ │ ├── encrypt_demo.png │ └── decrypt_demo.png │ ├── src/ ← Source Code │ ├── main.py ← Main program │ ├── encryptor.py ← Encryption logic │ ├── decryptor.py ← Decryption logic │ └── utils.py ← Key generation & logging │ ├── tests/ ← Unit Tests │ ├── test_encryptor.py │ ├── test_decryptor.py │ └── test_utils.py │ └── sandbox/ ← Safe testing folder ├── sample_text.txt └── sample_files/ └── sample1.txt 

• Understood ransomware workflow (key, encrypt, decrypt)
• Implemented AES-256 encryption in Python using pyAesCrypt
• Practiced secure coding with logging and sandboxing
• Gained hands-on with project structure & testing
• Learned professional GitHub documentation

MD SAMIUR RAHMAN TANIM Intern at Codec Technologies 🔗 GitHub | LinkedIn

• Thanks to Codec Technologies for the internship opportunity
• Python & pyAesCrypt community for excellent documentation

Pull requests are welcome! Found bugs or improvements? Fork the repo and submit a PR.