Azure AD Device Code Phishing and PRT Device Registration
This rule detects two related scenarios: 1. Device Code Phishing: Correlates successful device code authentications with subsequent device registrations for the same user within a short time frame. This can indicate an attacker using a phished device code to register a new device. 2. Primary Refresh Token (PRT) Device Registration: Identifies device registrations that occur after an authentication to the Device Registration Service using a Primary Refresh Token. This pattern is indicative of an attacker minting a PRT and then using it to register or join a device, potentially bypassing conditional access policies.
Microsoft Sentinel (KQL)
