Suspicious Google Cloud Storage Buckets Modified or Deleted (via gcp.audit)

This rule detects when storage bucket is modified or deleted in Google Cloud.

SigmamediumCloudv1
sigma
title: Suspicious Google Cloud Storage Buckets Modified or Deleted (via gcp.audit)
id: 86a2d175-df26-56c5-9ba6-9518a6b91d6c
status: stable
description: This rule detects when storage bucket is modified or deleted in Google Cloud.
references:
    - https://cloud.google.com/storage/docs/json_api/v1/buckets
author: Huntrule Team
date: 2026-07-06
tags:
    - attack.impact
    - attack.t1485
logsource:
    product: gcp
    service: gcp.audit
detection:
    selection:
        gcp.audit.method_name:
            - storage.buckets.delete
            - storage.buckets.insert
            - storage.buckets.update
            - storage.buckets.patch
    condition: selection
falsepositives:
    - Unknown
level: medium

Known false positives

  • Unknown

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.