Sigma rule: Google Cloud Storage Buckets Enumeration

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-55d78fd41d94, updated 2022-10-09T00:00:00.000Z.

Rule

Title
Google Cloud Storage Buckets Enumeration
Status
test
Level
low
Author
Austin Songer @austinsonger
Date
2021-08-14
Modified
2022-10-09
File
rules/cloud/gcp/audit/gcp_bucket_enumeration.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects when storage bucket is enumerated in Google Cloud.

Log source

product
gcp
service
gcp.audit

Detection

selection:
    gcp.audit.method_name:
        - storage.buckets.list
        - storage.buckets.listChannels
condition: selection

False positives (as the rule lists them)

  • Storage Buckets being enumerated may be performed by a system administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
  • Storage Buckets enumerated from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Tags

  • attack.discovery

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/gcp/audit/gcp_bucket_enumeration.yml

Sources and licences

  • SigmaHQ

    "Google Cloud Storage Buckets Enumeration" by Austin Songer @austinsonger (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/gcp/audit/gcp_bucket_enumeration.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: Google Cloud Storage Buckets Enumeration",
entity page, dataset version ref-55d78fd41d94, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/e2feb918-4e77-4608-9697-990a1aaf74c3 (accessed 2026-11-03).
Underlying source: SigmaHQ rule e2feb918-4e77-4608-9697-990a1aaf74c3, 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.