Files
sigma-rules/rules
Isai 25545b5802 [Rule Tunings] AWS New Terms History Window Reduction (#5479)
I reduced the history window for new terms rules that were either:
- `now-14 days`
- showing slow performance metrics

There are still several AWS rules with a `now-10d` window but they are not showing any performance issues so I'd like to leave them as is for now.

First Time Seen AWS Secret Value Accessed in Secrets Manager
- removed `BatchGetSecretValue` API call since this calls `GetSecretValue`
- removed the user_agent exclusions from this one, too easy to bypass.

AWS EC2 User Data Retrieval for EC2 Instance
- excluded more benign AWS services from telemetry

AWS IAM Assume Role Policy Update
- removed use of cloudformation exclusion, this should be captured as well
2025-12-18 11:47:59 -05:00
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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