IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elastic Security Solution [8.4] ›Detections and alerts ›Prebuilt rule reference

GCP Storage Bucket Configuration Modification

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GCP Storage Bucket Configuration Modification

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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:

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

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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

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











Threat mapping
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Framework: MITRE ATT&CKTM














Rule version history
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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

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Version 2 (7.11.0 release)








    

  • 

    Updated query, changed from:
    

    

    

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

    

    • 




















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