Possible Google Cloud Storage Buckets Enumeration (via gcp.audit)

This rule detects when storage bucket is enumerated in Google Cloud.

SigmalowCloudv1
sigma
title: Possible Google Cloud Storage Buckets Enumeration (via gcp.audit)
id: 6f041954-5e33-5694-a3d1-4719c8f0e516
status: stable
description: This rule detects when storage bucket is enumerated in Google Cloud.
references:
    - https://cloud.google.com/storage/docs/json_api/v1/buckets
author: Huntrule Team
date: 2026-05-31
tags:
    - attack.discovery
    - attack.t1619
logsource:
    product: gcp
    service: gcp.audit
detection:
    selection:
        gcp.audit.method_name:
            - storage.buckets.list
            - storage.buckets.listChannels
    condition: selection
falsepositives:
    - Unknown
level: low

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.