Isai
1ed322f8d9
Rule is triggering as expected, very low instances of alerts in telemetry - adjusted execution window - slight edits to IG for accuracy - removed exclusion `and not aws.cloudtrail.user_identity.arn: *AWSServiceRoleForAmazonSSM/StateManagerService*` from the query. This is a service-linked role meant to be used by AWS internal services. Therefore, the existing exclusion `and not source.address: "ssm.amazonaws.com"` already excludes the use of this role by the SSM service. I show this in the screenshot below. This will remove the use of wildcards in the query and improve performance. - changed the new terms fields to use combination of `cloud.account.id` and `user.name` so that only roles (and not individual role sessions) are being evaluated. adding `cloud.account.id` accounts for duplicate user.names across multiple accounts.
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 |