Azure Key Vault Modified

Elastic Stack Serverless Security

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: 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/key-vault/general/basic-concepts
• https://docs.microsoft.com/en-us/azure/key-vault/general/secure-your-key-vault

Tags:

• Elastic
• Cloud
• Azure
• Continuous Monitoring
• SecOps
• Data Protection

Version: 7

Rule authors:

• Elastic

Rule license: Elastic License v2

event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.KEYVAULT/VAULTS/WRITE" 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: Unsecured Credentials
  • ID: T1552
  • Reference URL: https://attack.mitre.org/techniques/T1552/

• Sub-technique:

  • Name: Credentials In Files
  • ID: T1552.001
  • Reference URL: https://attack.mitre.org/techniques/T1552/001/