Sign-in Failure Due to Conditional Access Requirements Not Met

Define a baseline threshold for failed sign-ins due to Conditional Access failures

Sigma rule (View on GitHub)

 1title: Sign-in Failure Due to Conditional Access Requirements Not Met
 2id: b4a6d707-9430-4f5f-af68-0337f52d5c42
 3status: test
 4description: Define a baseline threshold for failed sign-ins due to Conditional Access failures
 5references:
 6    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-privileged-accounts
 7author: Yochana Henderson, '@Yochana-H'
 8date: 2022/06/01
 9tags:
10    - attack.initial_access
11    - attack.credential_access
12    - attack.t1110
13    - attack.t1078.004
14logsource:
15    product: azure
16    service: signinlogs
17detection:
18    selection:
19        ResultType: 53003
20        Resultdescription: Blocked by Conditional Access
21    condition: selection
22falsepositives:
23    - Service Account misconfigured
24    - Misconfigured Systems
25    - Vulnerability Scanners
26level: high

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