Azure AD Only Single Factor Authentication Required

Detect when users are authenticating without MFA being required.

Sigma rule (View on GitHub)

 1title: Azure AD Only Single Factor Authentication Required
 2id: 28eea407-28d7-4e42-b0be-575d5ba60b2c
 3status: test
 4description: Detect when users are authenticating without MFA being required.
 5references:
 6    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts
 7author: MikeDuddington, '@dudders1'
 8date: 2022/07/27
 9tags:
10    - attack.initial_access
11    - attack.credential_access
12    - attack.t1078.004
13    - attack.t1556.006
14logsource:
15    product: azure
16    service: signinlogs
17detection:
18    selection:
19        Status: 'Success'
20        AuthenticationRequirement: 'singleFactorAuthentication'
21    condition: selection
22falsepositives:
23    - If this was approved by System Administrator.
24level: low

References

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