New Query: High Volume SMB File Copy (Data Exfiltration / Ransomware) – Microsoft Defender for Identity#55
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dweissbacher merged 1 commit intoMay 21, 2026
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New Query Submission
Name: High Volume SMB File Copy (Data Exfiltration / Ransomware) – Microsoft Defender for Identity
Author: Kundan Kumar
Submission ID: f015cfd7-ee64-430a-9b9c-d8d71c2718df
Description
Detects a large volume of file transfers over SMB within a short timeframe, as identified by Microsoft Defender for Identity. This behavior may indicate bulk data exfiltration or ransomware activity, where files are rapidly copied, staged, or encrypted across systems and should be investigated immediately.
This PR was automatically created by the CQL Hub submission pipeline.