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Suspicious SignIns From A Non Registered Device

Detects risky authentication from a non AD registered device without MFA being required.

MITRE ATT&CK

privilege-escalationpersistenceinitial-accessdefense-evasion

Detection Query

selection_main:
  Status: Success
  AuthenticationRequirement: singleFactorAuthentication
  RiskState: atRisk
selection_empty1:
  DeviceDetail.trusttype: ""
selection_empty2:
  DeviceDetail.trusttype: null
condition: selection_main and 1 of selection_empty*

Author

Harjot Singh, '@cyb3rjy0t'

Created

2023-01-10

Data Sources

azuresigninlogs

Platforms

azure

References

https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#non-compliant-device-sign-in

Tags

attack.privilege-escalationattack.persistenceattack.initial-accessattack.defense-evasionattack.t1078

Raw Content

title: Suspicious SignIns From A Non Registered Device
id: 572b12d4-9062-11ed-a1eb-0242ac120002
status: test
description: Detects risky authentication from a non AD registered device without MFA being required.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#non-compliant-device-sign-in
author: Harjot Singh, '@cyb3rjy0t'
date: 2023-01-10
modified: 2025-07-02
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.defense-evasion
    - attack.t1078
logsource:
    product: azure
    service: signinlogs
detection:
    selection_main:
        Status: 'Success'
        AuthenticationRequirement: 'singleFactorAuthentication'
        RiskState: 'atRisk'
    selection_empty1:
        DeviceDetail.trusttype: ''
    selection_empty2:
        DeviceDetail.trusttype: null
    condition: selection_main and 1 of selection_empty*
falsepositives:
    - Unknown
level: high