Suspicious ADRS Token Request by Microsoft Auth Broker

Identifies Entra ID sign-in events where a user authenticates using a refresh token issued to the Microsoft Authentication Broker (MAB) client, targeting the Device Registration Service (DRS) with the "adrs_access" OAuth scope. This pattern is a strong indicator of an adversary using a stolen refresh token to initiate a malicious device registration flow, often with tools like ROADtx, as a step towards establishing persistence.