Azure Login Bypassing Conditional Access Policies — Sigma Rule

Rule metadata and linked tags

Author: Josh Nickels, Marius Rothenbücher. Source status: experimental; severity: high. Source dates: 2025-01-08 / not supplied.

{
  "service": "audit",
  "product": "m365"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 10a3fb8a8240ea72d29290bf7f75853a3e2c84a53e52721a90dd8f1485f175ab

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Azure Login Bypassing Conditional Access Policies
id: 13f2d3f5-6497-44a7-bf5f-dc13ffafe5dc
status: experimental
description: |
    Detects a successful login to the Microsoft Intune Company Portal which could allow bypassing Conditional Access Policies and InTune device trust using a tool like TokenSmith.
author: Josh Nickels, Marius Rothenbücher
references:
    - https://labs.jumpsec.com/tokensmith-bypassing-intune-compliant-device-conditional-access/
    - https://github.com/JumpsecLabs/TokenSmith
date: 2025-01-08
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
logsource:
    service: audit
    product: m365
detection:
    selection:
        Operation: 'UserLoggedIn'
        ApplicationId: '9ba1a5c7-f17a-4de9-a1f1-6178c8d51223'
        ResultStatus: 'Success'
        RequestType: 'Cmsi:Cmsi'
    filter_main_bjectid:
        ObjectId: '0000000a-0000-0000-c000-000000000000' # Microsoft Intune seen when mobile devices are enrolled
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://labs.jumpsec.com/tokensmith-bypassing-intune-compliant-device-conditional-access/
• https://github.com/JumpsecLabs/TokenSmith