Sigma rule: Potential Bucket Enumeration on AWS

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-966f2fadf6a1, updated 2024-07-10T00:00:00.000Z.

Rule

Title
Potential Bucket Enumeration on AWS
Status
test
Level
low
Author
Christopher Peacock @securepeacock, SCYTHE @scythe_io
Date
2023-01-06
Modified
2024-07-10
File
rules/cloud/aws/cloudtrail/aws_enum_buckets.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Looks for potential enumeration of AWS buckets via ListBuckets.

Log source

product
aws
service
cloudtrail

Detection

selection:
    eventSource: 's3.amazonaws.com'
    eventName: 'ListBuckets'
filter:
    userIdentity.type: 'AssumedRole'
condition: selection and not filter

False positives (as the rule lists them)

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

Tags

  • attack.discovery
  • attack.t1580
  • attack.t1619

MITRE ATT&CK ids this rule names

Related rules

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/aws/cloudtrail/aws_enum_buckets.yml

Sources and licences

  • SigmaHQ

    "Potential Bucket Enumeration on AWS" by Christopher Peacock @securepeacock, SCYTHE @scythe_io (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/aws/cloudtrail/aws_enum_buckets.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Potential Bucket Enumeration on AWS",
entity page, dataset version ref-966f2fadf6a1, updated 2024-07-10T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/f305fd62-beca-47da-ad95-7690a0620084 (accessed 2026-11-03).
Underlying source: SigmaHQ rule f305fd62-beca-47da-ad95-7690a0620084, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.