[New Rule] Adding Coverage for Self-Created Login Profile for Root Accounts in AWS

[terrancedejesus]

Pull Request

Issue link(s):

• https://github.com/elastic/ia-trade-team/issues/272

Summary - What I changed

Added detection coverage for self-created login profile's for Root member accounts in AWS. By default, management root accounts are given a login profile when the AWS org is setup, however, if centralized management is enabled in AWS, member root accounts are not given login profiles by default.

Additional Information:
To avoid potential false-positives and anomaly detection, below was added to the query.

• aws.cloudtrail.user_identity.type == Root --> Ensures that the user attempting to create the login profile is a Root account.
• aws.cloudtrail.user_identity.access_key_id IS NOT NULL --> Ensures that the action was done with an access key and programmatically, which is likely for compromised credentials
• NOT TO_LOWER(aws.cloudtrail.request_parameters) LIKE "*username*" --> Ensures that the username parameter was not passed in the create_login_profile() request, which then uses the authenticated session of the existing user.

There is an existing BBR rule for CreateLoginProfile action as this API event is not uncommon, except for the context of this new rule. I chose not to change the BBR rule for this detection logic as it is very specific and if done so, may lead to false-negatives. --> https://github.com/elastic/detection-rules/blob/main/rules_building_block/persistence_aws_iam_login_profile_added_to_user.toml

How To Test

Checklist

• Added a label for the type of pr: bug, enhancement, schema, maintenance, Rule: New, Rule: Deprecation, Rule: Tuning, Hunt: New, or Hunt: Tuning so guidelines can be generated
• Added the meta:rapid-merge label if planning to merge within 24 hours
• Secret and sensitive material has been managed correctly
• Automated testing was updated or added to match the most common scenarios
• Documentation and comments were added for features that require explanation

Contributor checklist

• Have you signed the contributor license agreement?
• Have you followed the contributor guidelines?

[protectionsmachine]

Rule: New - Guidelines

These guidelines serve as a reminder set of considerations when proposing a new rule.

Documentation and Context

• Detailed description of the rule.
• List any new fields required in ECS/data sources.
• Link related issues or PRs.
• Include references.

Rule Metadata Checks

• creation_date matches the date of creation PR initially merged.
• min_stack_version should support the widest stack versions.
• name and description should be descriptive and not include typos.
• query should be inclusive, not overly exclusive, considering performance for diverse environments. Non ecs fields should be added to non-ecs-schema.json if not available in an integration.
• min_stack_comments and min_stack_version should be included if the rule is only compatible starting from a specific stack version.
• index pattern should be neither too specific nor too vague, ensuring it accurately matches the relevant data stream (e.g., use logs-endpoint.process-* for process data).
• integration should align with the index. If the integration is newly introduced, ensure the manifest, schemas, and new_rule.yaml template are updated.
• setup should include the necessary steps to configure the integration.
• note should include any additional information (e.g. Triage and analysis investigation guides, timeline templates).
• tags should be relevant to the threat and align/added to the EXPECTED_RULE_TAGS in the definitions.py file.
• threat, techniques, and subtechniques should map to ATT&CK always if possible.

New BBR Rules

• building_block_type should be included if the rule is a building block and the rule should be located in the rules_building_block folder.
• bypass_bbr_timing should be included if adding custom lookback timing to the rule.

Testing and Validation

• Provide evidence of testing and detecting the expected threat.
• Check for existence of coverage to prevent duplication.

[Aegrah]

LGTM!