Unusual Child Process from a System Virtual Process

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Unusual Child Process from a System Virtual Process

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Identifies a suspicious child process of the Windows virtual system process, which could indicate code injection.

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: None

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Defense Evasion
  • Elastic Endgame

Version: 104

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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process where host.os.type == "windows" and event.type == "start" and
  process.parent.pid == 4 and
  not process.executable : ("Registry", "MemCompression", "?:\\Windows\\System32\\smss.exe")

Framework: MITRE ATT&CKTM