Sigma rule: Sign-ins by Unknown Devices

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-d6580102b380, updated 2022-10-05T00:00:00.000Z.

Rule

Title
Sign-ins by Unknown Devices
Status
test
Level
low
Author
Michael Epping, '@mepples21'
Date
2022-06-28
Modified
2022-10-05
File
rules/cloud/azure/signin_logs/azure_ad_sign_ins_from_unknown_devices.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Monitor and alert for Sign-ins by unknown devices from non-Trusted locations.

Log source

product
azure
service
signinlogs

Detection

selection:
    AuthenticationRequirement: singleFactorAuthentication
    ResultType: 0
    NetworkLocationDetails: '[]'
    DeviceDetail.deviceId: ''
condition: selection

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.privilege-escalation
  • attack.persistence
  • attack.initial-access
  • attack.stealth
  • attack.t1078.004

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/signin_logs/azure_ad_sign_ins_from_unknown_devices.yml

Sources and licences

  • SigmaHQ

    "Sign-ins by Unknown Devices" by Michael Epping, '@mepples21' (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/cloud/azure/signin_logs/azure_ad_sign_ins_from_unknown_devices.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Sign-ins by Unknown Devices",
entity page, dataset version ref-d6580102b380, updated 2022-10-05T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4d136857-6a1a-432a-82fc-5dd497ee5e7c (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4d136857-6a1a-432a-82fc-5dd497ee5e7c, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.