Azure Keyvault Key Modified or Deleted

Identifies when a Keyvault Key is modified or deleted in Azure.

Sigma rule (View on GitHub)

 1title: Azure Keyvault Key Modified or Deleted
 2id: 80eeab92-0979-4152-942d-96749e11df40
 3status: test
 4description: Identifies when a Keyvault Key is modified or deleted in Azure.
 5references:
 6    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
 7author: Austin Songer @austinsonger
 8date: 2021/08/16
 9modified: 2022/08/23
10tags:
11    - attack.impact
12    - attack.credential_access
13    - attack.t1552
14    - attack.t1552.001
15logsource:
16    product: azure
17    service: activitylogs
18detection:
19    selection:
20        operationName:
21            - MICROSOFT.KEYVAULT/VAULTS/KEYS/UPDATE/ACTION
22            - MICROSOFT.KEYVAULT/VAULTS/KEYS/CREATE
23            - MICROSOFT.KEYVAULT/VAULTS/KEYS/CREATE/ACTION
24            - MICROSOFT.KEYVAULT/VAULTS/KEYS/IMPORT/ACTION
25            - MICROSOFT.KEYVAULT/VAULTS/KEYS/RECOVER/ACTION
26            - MICROSOFT.KEYVAULT/VAULTS/KEYS/RESTORE/ACTION
27            - MICROSOFT.KEYVAULT/VAULTS/KEYS/DELETE
28            - MICROSOFT.KEYVAULT/VAULTS/KEYS/BACKUP/ACTION
29            - MICROSOFT.KEYVAULT/VAULTS/KEYS/PURGE/ACTION
30    condition: selection
31falsepositives:
32    - Key being modified or deleted may be performed by a system administrator.
33    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
34    - Key modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
35level: medium

References

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