Windows Service Installed via an Unusual Clientedit

Identifies the creation of a Windows service by an unusual client process. Services may be created with administrator privileges but are executed under SYSTEM privileges, so an adversary may also use a service to escalate privileges from administrator to SYSTEM.

Rule type: query

Rule indices:

  • winlogbeat-*
  • logs-system.*

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



  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Privilege Escalation

Version: 1

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guideedit

## Config

The 'Audit Security System Extension' logging policy must be configured for (Success)
Steps to implement the logging policy with with Advanced Audit Configuration:

Computer Configuration >
Policies >
Windows Settings >
Security Settings >
Advanced Audit Policies Configuration >
Audit Policies >
System >
Audit Security System Extension (Success)

Rule queryedit

event.action:"service-installed"  and (winlog.event_data.ClientProcessId:"0" or winlog.event_data.ParentProcessId:"0")