CA Policy Updated by Non Approved Actor

Monitor and alert on conditional access changes. Is Initiated by (actor) approved to make changes? Review Modified Properties and compare "old" vs "new" value.

Sigma rule (View on GitHub)

 1title: CA Policy Updated by Non Approved Actor
 2id: 50a3c7aa-ec29-44a4-92c1-fce229eef6fc
 3status: test
 4description: Monitor and alert on conditional access changes. Is Initiated by (actor) approved to make changes? Review Modified Properties and compare "old" vs "new" value.
 5references:
 6    - https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/security-operations-infrastructure#conditional-access
 7author: Corissa Koopmans, '@corissalea'
 8date: 2022/07/19
 9tags:
10    - attack.defense_evasion
11    - attack.persistence
12    - attack.t1548
13    - attack.t1556
14logsource:
15    product: azure
16    service: auditlogs
17detection:
18    keywords:
19        - Update conditional access policy
20    condition: keywords
21falsepositives:
22    - Misconfigured role permissions
23    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
24level: medium

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