GCP Storage Bucket Configuration Modification

Identifies when the configuration is modified for a storage bucket in Google Cloud Platform (GCP). An adversary may modify the configuration of a storage bucket in order to weaken the security controls of their target’s environment.

Rule type: query

Rule indices:

filebeat-*
logs-gcp*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: None (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://cloud.google.com/storage/docs/key-terms#buckets

Tags:

Elastic
Cloud
GCP
Continuous Monitoring
SecOps
Identity and Access
Defense Evasion

Version: 7

Rule authors:

Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

event.dataset:gcp.audit and event.action:"storage.buckets.update" and event.outcome:success

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Modify Cloud Compute Infrastructure
- ID: T1578
- Reference URL: https://attack.mitre.org/techniques/T1578/

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