Microsoft Build Engine Started by a System Process

edit

Microsoft Build Engine Started by a System Process

edit

An instance of MSBuild, the Microsoft Build Engine, was started by Explorer or the WMI (Windows Management Instrumentation) subsystem. This behavior is unusual and is sometimes used by malicious payloads.

Rule type: eql

Rule indices:

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

Severity: medium

Risk score: 47

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:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Defense Evasion
  • Data Source: Elastic Endgame
  • Data Source: Elastic Defend

Version: 106

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit
process where host.os.type == "windows" and event.type == "start" and
  process.name : "MSBuild.exe" and
  process.parent.name : ("explorer.exe", "wmiprvse.exe")

Framework: MITRE ATT&CKTM