Successful Device Registration to Azure Entra Device Registration Service
This rule detects successful device registrations to the 'Device Registration Service' in Azure Entra. It specifically looks for sign-in events where the ResourceDisplayName is 'Device Registration Service', the ErrorCode is '0' (indicating success), and the ConditionalAccessStatus is not '1' (which typically means that conditional access did not block the authentication flow for device registration). The rule is pivotal for hunting devices registered for persistence, post-successful phishing campaign execution, where >= 1 accounts were compromised.
Microsoft Sentinel (KQL)
