Azure Key Vault Modifiededit

Identifies modifications to a Key Vault in Azure. The Key Vault is a service that safeguards encryption keys and secrets like certificates, connection strings, and passwords. Because this data is sensitive and business critical, access to key vaults should be secured to allow only authorized applications and users.

Rule type: query

Rule indices:

  • filebeat-*
  • logs-azure*

Severity: medium

Risk score: 47

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
  • Data Protection

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 positivesedit

Key vault modifications may be done by a system or network administrator. Verify whether the username, hostname, and/or resource name should be making changes in your environment. Key vault modifications from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.

Investigation guideedit


Rule queryedit

event.dataset:azure.activitylogs and
azure.activitylogs.operation_name:"MICROSOFT.KEYVAULT/VAULTS/WRITE"
and event.outcome:(Success or success)

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 100 (8.5.0 release)
  • Formatting only
Version 7 (8.4.0 release)
  • Formatting only
Version 5 (7.13.0 release)
  • Formatting only
Version 4 (7.12.0 release)
  • Updated query, changed from:

    event.dataset:azure.activitylogs and
    azure.activitylogs.operation_name:MICROSOFT.KEYVAULT/VAULTS/WRITE and
    event.outcome:(Success or success)
Version 3 (7.11.2 release)
  • Formatting only
Version 2 (7.11.0 release)
  • Updated query, changed from:

    event.dataset:azure.activitylogs and
    azure.activitylogs.operation_name:MICROSOFT.KEYVAULT/VAULTS/WRITE and
    event.outcome:Success