Isai
db1f8d1fab
* [Rule Tuning] Potential AWS S3 Bucket Ransomware Note Uploaded - changed this from ESQL to EQL. While initially were only able to isolate uploaded file names using the `aws.cloudtrail.request_parameters` field, we now can use the target.entity.id field to isolate the uploaded file arn. I've adjusted the regex pattern to distinguish between the bucket name and the file uploaded, both of which are included in the target.entity.id field. - I chose eql instead of esql to 1. provide more meaningful alert context to the user and 2. allow for easier exclusions for the user. Right now these alerts aren't generating much meaningful context. - edits to description - new investigation guide using specific AWS IR Ransomware Playbooks as additional context - additional MITRE technique * added highlighted fields added highlighted fields * fixed MITRE reference * added cloudtrail index mapping * Update rules/integrations/aws/impact_s3_bucket_object_uploaded_with_ransom_extension.toml Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> * using aws.cloudtrail.resources.arn instead of target.entity.id using aws.cloudtrail.resources.arn instead of target.entity.id * Apply suggestions from code review --------- Co-authored-by: Jonhnathan <26856693+w0rk3r@users.noreply.github.com> Co-authored-by: shashank-elastic <91139415+shashank-elastic@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 |