Azure AD/Entra Audit Logs: Device Registration Policy Changes

Alerts on Azure audit log events that set or modify the device registration policy.

FreeReviewedSigma · High · v5
Product
azure
Service
auditlogs
Author
Michael Epping, '@mepples21' (SigmaHQ), DRL 1.1
Published
2022-06-28
Updated
2026-07-31
title: "Azure AD/Entra Audit Logs: Device Registration Policy Changes"
id: 013e380c-3504-4172-9938-d864fbb1f722
status: test
description: This rule identifies audit log events where the device registration policy is set or modified. Attackers may change device registration settings to weaken security controls, enabling unauthorized device joins or registrations. It relies on Azure audit log entries that record the policy change activity category and display name.
references:
  - https://learn.microsoft.com/en-us/entra/architecture/security-operations-devices#device-registrations-and-joins-outside-policy
  - https://github.com/SigmaHQ/sigma/blob/master/rules/cloud/azure/audit_logs/azure_ad_device_registration_policy_changes.yml
author: Michael Epping, '@mepples21', Huntrule Team
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
license: DRL-1.1
related:
  - id: 9494bff8-959f-4440-bbce-fb87a208d517
    type: derived