User Risk and MFA Registration Policy Updated

calendar Aug 21, 2024 · attack.persistence  ·
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Detects changes and updates to the user risk and MFA registration policy. Attackers can modified the policies to Bypass MFA, weaken security thresholds, facilitate further attacks, maintain persistence.

Sigma rule (View on GitHub)

 1title: User Risk and MFA Registration Policy Updated
 2id: d4c7758e-9417-4f2e-9109-6125d66dabef
 3status: experimental
 4description: |
 5    Detects changes and updates to the user risk and MFA registration policy.
 6    Attackers can modified the policies to Bypass MFA, weaken security thresholds, facilitate further attacks, maintain persistence.    
 7references:
 8    - https://learn.microsoft.com/en-us/entra/id-protection/howto-identity-protection-configure-mfa-policy
 9    - https://learn.microsoft.com/en-us/entra/identity/monitoring-health/reference-audit-activities
10author: Harjot Singh (@cyb3rjy0t)
11date: 2024-08-13
12tags:
13    - attack.persistence
14logsource:
15    product: azure
16    service: auditlogs
17detection:
18    selection:
19        LoggedByService: 'AAD Management UX'
20        Category: 'Policy'
21        OperationName: 'Update User Risk and MFA Registration Policy'
22    condition: selection
23falsepositives:
24    - Known updates by administrators.
25level: high

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