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« Suspicious Print Spooler SPL File Created Suspicious Proc Pseudo File System Enumeration »

Suspicious PrintSpooler Service Executable File Creationedit

Detects attempts to exploit privilege escalation vulnerabilities related to the Print Spooler service. For more information refer to the following CVE’s - CVE-2020-1048, CVE-2020-1337 and CVE-2020-1300 and verify that the impacted system is patched.

Rule type: eql

Rule indices:

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

Severity: high

Risk score: 73

Runs every: 5m

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

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Privilege Escalation
  • Data Source: Elastic Endgame
  • Use Case: Vulnerability
  • Data Source: Elastic Defend

Version: 105

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule queryedit

file where host.os.type == "windows" and event.type == "creation" and
  process.name : "spoolsv.exe" and file.extension : "dll" and
  file.path : ("?:\\Windows\\System32\\*", "?:\\Windows\\SysWOW64\\*") and
  not file.path :
          ("?:\\WINDOWS\\SysWOW64\\PrintConfig.dll",
           "?:\\WINDOWS\\system32\\x5lrs.dll",
           "?:\\WINDOWS\\sysWOW64\\x5lrs.dll",
           "?:\\WINDOWS\\system32\\PrintConfig.dll")

Framework: MITRE ATT&CKTM

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