IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« GCP Service Account Key Creation GCP Storage Bucket Deletion »

› › ›

GCP Storage Bucket Configuration Modification

edit

GCP Storage Bucket Configuration Modification

edit

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: 5 minutes

Searches indices from: now-6m (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 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

edit

Storage bucket configuration may be modified by system administrators. Verify that the configuration change was expected. Exceptions can be added to this rule to filter expected behavior.

Investigation guide

edit

Rule query

edit

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

Threat mapping

edit

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/

Rule version history

edit

Version 7 (8.4.0 release)

Updated query, changed from:

event.dataset:(googlecloud.audit or gcp.audit) and
event.action:"storage.buckets.update" and event.outcome:success

Version 5 (7.13.0 release)

Updated query, changed from:

event.dataset:(googlecloud.audit or gcp.audit) and
event.action:storage.buckets.update and event.outcome:success

Version 4 (7.12.0 release)

Formatting only

Version 3 (7.11.2 release)

Formatting only

Version 2 (7.11.0 release)

Updated query, changed from:

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

« GCP Service Account Key Creation GCP Storage Bucket Deletion »