Changes to Device Registration Policy — Sigma Rule

Rule metadata and linked tags

Author: Michael Epping, '@mepples21'. Source status: test; severity: high. Source dates: 2022-06-28 / not supplied.

{
  "product": "azure",
  "service": "auditlogs"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: d5b5df0d0d11f5011457ac97a32cc2771f3dc3afaca08d797c4aa99e03a7e8fe

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: Changes to Device Registration Policy
id: 9494bff8-959f-4440-bbce-fb87a208d517
status: test
description: Monitor and alert for changes to the device registration policy.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#device-registrations-and-joins-outside-policy
author: Michael Epping, '@mepples21'
date: 2022-06-28
tags:
    - attack.privilege-escalation
    - attack.defense-impairment
    - attack.t1484
logsource:
    product: azure
    service: auditlogs
detection:
    selection:
        Category: 'Policy'
        ActivityDisplayName: 'Set device registration policies'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#device-registrations-and-joins-outside-policy