Explanation:

According to Microsoft Security Operations and Azure Defender (now Microsoft Defender for Cloud) documentation, to validate that Azure Security Center (ASC) - or Defender for Cloud - is properly configured to detect threats such as sign-ins from suspicious IP addresses , you must enable Defender for the subscription first. This step activates the advanced threat protection features that analyze security signals from Azure resources, including virtual machines and network connections.
Once enabled, Microsoft provides a test alert validation process using a PowerShell script or an executable test file to simulate an alert. The official procedure states that to test the alert generation capability, administrators should copy a provided executable file to a virtual machine onboarded to Defender and rename the file using the naming convention beginning with ASC_AlertTest_ followed by random characters. This allows Defender for Cloud to recognize it as a test event.
After renaming, the executable is run with appropriate arguments to trigger a benign test alert that validates Defender's detection pipeline. This alert verifies that the system correctly monitors VM activity and reports potential threats.
Changing alert severity or renaming files differently does not validate the configuration. Therefore, the correct sequence-confirmed by Microsoft documentation-is:
* Enable Azure Defender for the subscription.
* Copy and rename the alert test file (ASC_AlertTest_...).
* Run the executable file with required arguments to trigger and validate detection.