Isai
386c8f7e7a
* [New Rule] AWS GuardDuty Member Account Manipulation Detects attempts to manipulate GuardDuty member account relationships within AWS Organizations. This includes actions like `DisassociateFromAdministratorAccount`, `DeleteMembers`, `StopMonitoringMembers`, and `DeleteInvitations` that break centralized security visibility. These actions are often precursors to or alternatives for fully deleting GuardDuty detectors, allowing adversaries to operate undetected in member accounts. The idea for this rule was inspired by defense evasion techniques highlighted in Permiso's research on Scattered Spider, and expanded to include other relevant API calls that could be abused for the same purpose. Existing Related Coverage: We already detect `DeleteDetector` via defense_evasion_guardduty_detector_deletion.toml. This new rule complements that coverage by catching the manipulation of GuardDuty member relationships, actions that break org-level visibility without requiring full detector deletion. * toml file name change * Apply suggestions from code review Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com> --------- Co-authored-by: Mika Ayenson, PhD <Mikaayenson@users.noreply.github.com>
rules/
Rules within this folder are organized by solution or platform. The structure is flattened out, because nested file hierarchies are hard to navigate and find what you're looking for. Each directory contains several .toml files, and the primary ATT&CK tactic is included in the file name when it's relevant (i.e. windows/execution_via_compiled_html_file.toml)
| folder | description |
|---|---|
. |
Root directory where rules are stored |
apm/ |
Rules that use Application Performance Monitoring (APM) data sources |
cross-platform/ |
Rules that apply to multiple platforms, such as Windows and Linux |
integrations/ |
Rules organized by Fleet integration |
linux/ |
Rules for Linux or other Unix based operating systems |
macos/ |
Rules for macOS |
ml/ |
Rules that use machine learning jobs (ML) |
network/ |
Rules that use network data sources |
promotions/ |
Rules that promote external alerts into detection engine alerts |
windows/ |
Rules for the Microsoft Windows Operating System |
Integration specific rules are stored in the integrations/ directory:
| folder | integration |
|---|---|
aws/ |
Amazon Web Services (AWS) |
azure/ |
Microsoft Azure |
cyberarkpas/ |
Cyber Ark Privileged Access Security |
endpoint/ |
Elastic Endpoint Security |
gcp/ |
Google Cloud Platform (GCP) |
google_workspace/ |
Google Workspace (formerly GSuite) |
o365/ |
Microsoft Office |
okta/ |
Oka |