User Removed From Group With CA Policy Modification Access

calendar Oct 23, 2025 · attack.privilege-escalation attack.credential-access attack.defense-evasion attack.persistence attack.t1548 attack.t1556  ·
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Monitor and alert on group membership removal of groups that have CA policy modification access

Sigma rule (View on GitHub)

 1title: User Removed From Group With CA Policy Modification Access
 2id: 665e2d43-70dc-4ccc-9d27-026c9dd7ed9c
 3status: test
 4description: Monitor and alert on group membership removal of groups that have CA policy modification access
 5references:
 6    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-infrastructure#conditional-access
 7author: Mark Morowczynski '@markmorow', Thomas Detzner '@tdetzner'
 8date: 2022-08-04
 9tags:
10    - attack.privilege-escalation
11    - attack.credential-access
12    - attack.defense-evasion
13    - attack.persistence
14    - attack.t1548
15    - attack.t1556
16logsource:
17    product: azure
18    service: auditlogs
19detection:
20    selection:
21        properties.message: Remove member from group
22    condition: selection
23falsepositives:
24    - User removed from the group is approved
25level: medium

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