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Elastic Docs ›Elastic Security Solution [8.5] ›Detections and alerts ›Prebuilt rule reference

Azure Storage Account Key Regenerated

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Azure Storage Account Key Regenerated

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Identifies a rotation to storage account access keys in Azure. Regenerating access keys can affect any applications or Azure services that are dependent on the storage account key. Adversaries may regenerate a key as a means of acquiring credentials to access systems and resources.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-azure*

Severity: low

Risk score: 21

Runs every: 5 minutes

Searches indices from: now-25m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Cloud
  • Azure
  • Continuous Monitoring
  • SecOps
  • Identity and Access

Version: 100 (version history)

Added (Elastic Stack release): 7.10.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positives

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It’s recommended that you rotate your access keys periodically to help keep your storage account secure. Normal key rotation can be exempted from the rule. An abnormal time frame and/or a key rotation from unfamiliar users, hosts, or locations should be investigated.

Investigation guide

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Rule query
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event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:"MICROSOFT.STORAGE/STORAGEACCOUNTS/REGENERATEKEY/ACTION" and
event.outcome:(Success or success)











Threat mapping
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Framework: MITRE ATT&CKTM














Rule version history
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Version 100 (8.5.0 release)








    

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Formatting only

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Version 7 (8.4.0 release)








    

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Formatting only

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Version 5 (7.13.0 release)








    

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Formatting only

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Version 4 (7.12.0 release)








    

  • 

    Updated query, changed from:
    

    

    

    event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:MICROSOFT.STORAGE/STORAGEACCOUNTS/REGENERATEKEY/ACTION and
event.outcome:(Success or success)
    

    

    • 









Version 3 (7.11.2 release)








    

  • 
Formatting only

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Version 2 (7.11.0 release)








    

  • 

    Updated query, changed from:
    

    

    

    event.dataset:azure.activitylogs and azure.activitylogs.operation_name
:MICROSOFT.STORAGE/STORAGEACCOUNTS/REGENERATEKEY/ACTION and
event.outcome:Success
    

    

    • 




















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