Azure Keyvault Secrets Modified or Deleted

Description

Identifies when secrets are modified or deleted in Azure.

Query · sigma

selection:
  operationName:
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/WRITE
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/DELETE
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/BACKUP/ACTION
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/PURGE/ACTION
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/UPDATE/ACTION
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/RECOVER/ACTION
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/RESTORE/ACTION
  - MICROSOFT.KEYVAULT/VAULTS/SECRETS/SETSECRET/ACTION
condition: selection

Known false positives

  • Secrets being modified or deleted may be performed by a system administrator.
  • Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
  • Secrets modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Raw source Azure Keyvault Secrets Modified or Deleted · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: Azure Keyvault Secrets Modified or Deleted
id: b831353c-1971-477b-abb6-2828edc3bca1
status: test
description: Identifies when secrets are modified or deleted in Azure.
references:
    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
author: Austin Songer @austinsonger
date: 2021-08-16
modified: 2022-08-23
tags:
    - attack.impact
    - attack.credential-access
    - attack.t1552
    - attack.t1552.001
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        operationName:
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/WRITE
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/DELETE
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/BACKUP/ACTION
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/PURGE/ACTION
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/UPDATE/ACTION
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/RECOVER/ACTION
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/RESTORE/ACTION
            - MICROSOFT.KEYVAULT/VAULTS/SECRETS/SETSECRET/ACTION
    condition: selection
falsepositives:
    - Secrets being modified or deleted may be performed by a system administrator.
    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
    - Secrets modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
level: medium

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