Sentinel - Rapid Sharepoint downloads after Sign-in
This rule detects suspicious bulk file downloads from SharePoint by correlating successful sign-in events with subsequent file download activities. It specifically looks for sign-ins that are not from registered devices, followed by multiple file downloads (at least 3) within a short time window (up to 10 minutes) from the same IP address. The rule flags scenarios where a user downloads a significant number of unique files (at least 2) or has a high download count (5 or more), or a combination of moderate downloads (3 or more) within a very short duration (1 minute). This pattern can indicate data exfiltration attempts.
Microsoft Sentinel (KQL)
