This detection rule identifies sign-in attempts from IP addresses classified as malicious. The risk event type specified is 'suspiciousIPAddress', which indicates that the sign-in request originates from an IP address that has been deemed harmful based on threat intelligence data available at the time of the sign-in. The rule is configured within Azure's risk detection service, focusing on protecting user accounts from unauthorized access. Given the nature of cyber threats, the identification of malicious IP addresses is crucial for mitigating risks associated with command and control (C2) activities and potential data breaches. Users logged in from such IP addresses should be subject to further investigation to verify the legitimacy of their sign-ins and to take appropriate countermeasures as necessary.