The article highlights the potential of the AuthenticationProcessingDetails field in Microsoft Entra ID’s AADSignInEventsBeta table for advanced security investigations. It provides insights into detecting suspicious sign-in activities, such as IP mismatches, legacy TLS use, and login_hint abuse, through practical KQL examples. #AADSignInEventsBeta #AuthenticationProcessingDetails
Keypoints
- The AuthenticationProcessingDetails field offers valuable data for security analysis in Microsoft Entra ID.
- Focus on sessions where clients are not capable of CAE to identify vulnerabilities.
- Comparing IP addresses in JWTs and resource logs can reveal suspicious activity across countries.
- Detection of legacy TLS usage indicates outdated clients or potential downgrade attacks.
- Monitoring login_hint flags can expose automated or malicious login attempts.