Google Cloud Storage Bucket permissions modified

gcp

Classification:

compliance

Tactic:

TA0005-defense-evasion

Technique:

T1562-impair-defenses

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Goal

Detect when permissions have changed on a GCS Bucket.

Strategy

Monitor GCS bucket admin activity audit logs to determine the following method is invoked:

  • storage.setIamPermissions

Triage and response

Review the bucket permissions and ensure they are not overly permissive.

Changelog

5 September 2022 - Updated rule query.