Sign-ins by Unknown Devices

calendar Oct 23, 2025 · attack.privilege-escalation attack.persistence attack.initial-access attack.defense-evasion attack.t1078.004  ·
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Monitor and alert for Sign-ins by unknown devices from non-Trusted locations.

Sigma rule (View on GitHub)

 1title: Sign-ins by Unknown Devices
 2id: 4d136857-6a1a-432a-82fc-5dd497ee5e7c
 3status: test
 4description: Monitor and alert for Sign-ins by unknown devices from non-Trusted locations.
 5references:
 6    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#non-compliant-device-sign-in
 7author: Michael Epping, '@mepples21'
 8date: 2022-06-28
 9modified: 2022-10-05
10tags:
11    - attack.privilege-escalation
12    - attack.persistence
13    - attack.initial-access
14    - attack.defense-evasion
15    - attack.t1078.004
16logsource:
17    product: azure
18    service: signinlogs
19detection:
20    selection:
21        AuthenticationRequirement: singleFactorAuthentication
22        ResultType: 0
23        NetworkLocationDetails: '[]'
24        DeviceDetail.deviceId: ''
25    condition: selection
26falsepositives:
27    - Unknown
28level: low

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