Azure administrative unit modified

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azure

Classification:

attack

Tactic:

TA0003-persistence

Technique:

T1098-account-manipulation

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Goal

Detects the modification of Entra ID (Azure AD) Administrative Units (AUs). The modification of AUs may indicate suspicious activity if an environment is not utilizing AUs.

Strategy

Monitor Azure Active Directory logs for @properties.category:AdministrativeUnit and (@evt.name:"Update administrative unit" OR @evt.name:"Restore administrative unit" OR @evt.name:"Delete administrative unit" OR @evt.name:"Hard delete administrative unit") where the event is not a restricted administrative unit.

Triage and response

  1. Review if administrative units are used by the organization.
  2. Review evidence of anomalous activity for the user modifying an administrative unit.
  3. Determine if there is a legitimate reason for the user modifying an administrative unit.