Azure AD Device Registration from New IP Address
This rule detects new device registrations in Azure Active Directory (AAD) that originate from an IP address not previously associated with the user's account within the last 29 days. It filters out registrations from corporate IP ranges and common mobile operating systems (iOS, Android) to reduce noise. The rule categorizes the risk level of the IP address based on historical sign-in counts, focusing on 'High Risk - New IP' events. It then enriches these events with additional sign-in details like device name, risk level during sign-in, country, and city.
Microsoft Sentinel (KQL)
