Suspicious Bulk File Modifications or Deletions on Windows
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About the rule
Rule Type
Anomaly
Rule Description
Flags large file modifications/deletions which may indicate mass tampering.
Severity
Critical
Rule Requirement
Criteria
Action1: actionname = "File modified" | isanomalous(User at an unusual Time) | isanomalous(User with abnormal Count) | isanomalous(Log source at an unusual Time) | isanomalous(Log source with abnormal Count) | isanomalous(Log source with unusual Username) | isanomalous(User with unusual File Type) | isanomalous(Log source with unusual File Type) select Action1.HOSTNAME,Action1.MESSAGE,Action1.USERNAME,Action1.DOMAIN,Action1.OBJECTNAME,Action1.PROCESSNAME,Action1.ACCESSLIST
Detection
Execution Mode
Intelligent
Log Sources
Windows
