Azure user granted scoped role assignment over administrative unit

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azure

Classification:

attack

Tactic:

TA0003-persistence

Technique:

T1098-account-manipulation

Set up the azure integration.

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Goal

Detect scoped Entra ID (Azure AD) role assignment over an Administrative Unit (AU). Use of this type of role assignment may indicate suspicious activity if an environment is not utilizing AUs.

Strategy

Monitor Azure Active Directory logs for @properties.category:AdministrativeUnit and (@evt.name:"Add scoped member to role" OR @evt.name:"Add member to role scoped over Restricted Management Administrative Unit") where the event includes a restricted administrative unit.

Triage and response

  1. Review if restricted administrative units are used by the organization.
  2. Review evidence of anomalous activity for the user being granted role assignment to the restricted administrative unit.
  3. Determine if there is a legitimate reason for the user being granted role assignment to the restricted administrative unit.