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Elastic Docs ›Elastic Security Solution [7.10] ›Detections and Alerts ›Prebuilt rule reference

Suspicious PrintSpooler SPL File Created

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Suspicious PrintSpooler SPL File Created

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Detects attempts to exploit privilege escalation vulnerabilities related to the Print Spooler service including CVE-2020-1048 and CVE-2020-1337. .

Rule type: query

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.*

Severity: high

Risk score: 74

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Privilege Escalation

Version: 1

Added (Elastic Stack release): 7.10.0

Rule authors: Elastic

Rule license: Elastic License

Investigation guide

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Refer to CVEs, CVE-2020-1048 and CVE-2020-1337 for further information on the vulnerability and exploit. Verify that the relevant system is patched.

Rule query

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event.category:file and not event.type:deletion and
file.extension:(spl or SPL) and
file.path:C\:\\Windows\\System32\\spool\\PRINTERS\\* and not
process.name:(spoolsv.exe or printfilterpipelinesvc.exe or
PrintIsolationHost.exe or splwow64.exe or msiexec.exe or poqexec.exe)

Threat mapping

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Framework: MITRE ATT&CKTM

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