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Elastic Docs ›Elastic Security Solution [8.9] ›Detections and alerts ›Prebuilt rule reference

Suspicious Print Spooler Point and Print DLL

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Suspicious Print Spooler Point and Print DLL

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Detects attempts to exploit a privilege escalation vulnerability (CVE-2020-1030) related to the print spooler service. Exploitation involves chaining multiple primitives to load an arbitrary DLL into the print spooler process running as SYSTEM.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*
  • 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: 104

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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sequence by host.id with maxspan=30s
[registry where host.os.type == "windows" and
 registry.path : (
    "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers\\*\\SpoolDirectory",
    "\\REGISTRY\\MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers\\*\\SpoolDirectory"
    ) and
 registry.data.strings : "C:\\Windows\\System32\\spool\\drivers\\x64\\4"]
[registry where host.os.type == "windows" and
 registry.path : (
    "HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers\\*\\CopyFiles\\Payload\\Module",
    "\\REGISTRY\\MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers\\*\\CopyFiles\\Payload\\Module"
    ) and
 registry.data.strings : "C:\\Windows\\System32\\spool\\drivers\\x64\\4\\*"]

Framework: MITRE ATT&CKTM

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