Werfault ReflectDebugger Persistence

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Identifies the registration of a Werfault Debugger. Attackers may abuse this mechanism to execute malicious payloads every time the utility is executed with the "-pr" parameter.

Rule type: eql

Rule indices:

  • logs-endpoint.events.registry-*
  • endgame-*

Severity: low

Risk score: 21

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: Persistence
  • Data Source: Elastic Endgame
  • Data Source: Elastic Defend

Version: 2

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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registry where host.os.type == "windows" and event.type == "change" and
  registry.path : (
    "HKLM\\Software\\Microsoft\\Windows\\Windows Error Reporting\\Hangs\\ReflectDebugger",
    "\\REGISTRY\\MACHINE\\Software\\Microsoft\\Windows\\Windows Error Reporting\\Hangs\\ReflectDebugger"
  )

Framework: MITRE ATT&CKTM