Azure Storage Account Key Regenerated

Elastic Stack Serverless Security

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: 5m

Searches indices from: now-25m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References:

• https://docs.microsoft.com/en-us/azure/storage/common/storage-account-keys-manage?tabs=azure-portal

Tags:

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

Version: 7

Rule authors:

• Elastic

Rule license: Elastic License v2

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

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Credential Access
  • ID: TA0006
  • Reference URL: https://attack.mitre.org/tactics/TA0006/

• Technique:

  • Name: Steal Application Access Token
  • ID: T1528
  • Reference URL: https://attack.mitre.org/techniques/T1528/