Detection rules › Sigma
Sign-ins by Unknown Devices
Monitor and alert for Sign-ins by unknown devices from non-Trusted locations.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | |
| Persistence | |
| Privilege Escalation | |
| Stealth |
Telemetry coverage
Rules detecting the same action
These rules filter on the same operation.
- [Entra ID] Suspicious Continuous OAuth Token Usage (Kusto)
- Anomalous sign-in location by user account and authenticating application (Kusto)
- Anomalous Single Factor Signin (Kusto)
- Authentications of Privileged Accounts Outside of Expected Controls (Kusto)
- Azure Portal sign in from another Azure Tenant (Kusto)
- Azure Service Principal Sign-In Followed by Arc Cluster Credential Access (Elastic)
- Azure SignIn via Legacy Authentication Protocol (Panther)
- Cisco - firewall block but success logon to Microsoft Entra ID (Kusto)
Rule body
title: Sign-ins by Unknown Devices
id: 4d136857-6a1a-432a-82fc-5dd497ee5e7c
status: test
description: Monitor and alert for Sign-ins by unknown devices from non-Trusted locations.
references:
- https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#non-compliant-device-sign-in
author: Michael Epping, '@mepples21'
date: 2022-06-28
modified: 2022-10-05
tags:
- attack.privilege-escalation
- attack.persistence
- attack.initial-access
- attack.stealth
- attack.t1078.004
logsource:
product: azure
service: signinlogs
detection:
selection:
AuthenticationRequirement: singleFactorAuthentication
ResultType: 0
NetworkLocationDetails: '[]'
DeviceDetail.deviceId: ''
condition: selection
falsepositives:
- Unknown
level: low
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
AuthenticationRequirement: singleFactorAuthentication
ResultType: 0
NetworkLocationDetails: '[]'
DeviceDetail.deviceId: ''
Indicators
These rows show field, operator, and value matches.