Azure Service Principal Removed

title: Azure Service Principal Removed
id: 448fd1ea-2116-4c62-9cde-a92d120e0f08
status: test
description: Identifies when a service principal was removed in Azure.
references:
    - https://learn.microsoft.com/en-us/entra/identity/monitoring-health/reference-audit-activities#application-proxy
author: Austin Songer @austinsonger
date: 2021-09-03
modified: 2022-10-09
tags:
    - attack.defense-evasion
logsource:
    product: azure
    service: activitylogs
detection:
    selection:
        properties.message: Remove service principal
    condition: selection
falsepositives:
    - Service principal being removed may be performed by a system administrator.
    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
    - Service principal removed from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
level: medium