Rules Contributing to Suspicious AWS Bucket Enumeration Alert

The following rules are used to identify suspicious activity related to AWS Bucket Enumeration. Any one or more of these will trigger AWS Bucket Enumeration Alert. Details for each rule can be viewed by clicking the More Details link in the description.

Title

Description

Potential Bucket Enumeration on AWS

Looks for potential enumeration of AWS buckets via ListBuckets.

Rule ID

aws_6

Query

{'selection': {'eventSource': 'ec2.amazonaws.com', 'eventName': 'ListBuckets'}, 'filter': {'type': 'AssumedRole'}, 'condition': 'selection and not filter'}

Log Source

Stellar Cyber AWS configured for:

  • AWS Cloudtrail

Rule Source

SigmaHQ,f305fd62-beca-47da-ad95-7690a0620084

Author: Christopher Peacock @securepeacock, SCYTHE @scythe_io

Tactics, Techniques, and Procedures

TA0007, T1580

References

N/A

Severity

25

Suppression Logic Based On

  • service_id
  • eventSource
  • eventName
  • stellar.rule_id

Additional Information

Maturity Creation Date Risk Level False Positives
experimental 2023/01/06 low

  • Administrators listing buckets, it may be necessary to filter out users who commonly conduct this activity.