Elastic medium stable eql

Suspicious Print Spooler File Deletion

Detects deletion of print driver files by an unusual process. This may indicate a clean up attempt post successful privilege escalation via Print Spooler service related vulnerabilities.

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Detection Logic

file where host.os.type == "windows" and event.type == "deletion" and
  file.extension : "dll" and file.path : "?:\\Windows\\System32\\spool\\drivers\\x64\\3\\*.dll" and
  not process.name : ("spoolsv.exe", "dllhost.exe", "explorer.exe")

False Positives

⚠ Uninstall or manual deletion of a legitimate printing driver files. Verify the printer file metadata such as manufacturer and signature information.

Field Validations

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