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.*
- logs-windows.*
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
Version: 108
Rule authors:
- Elastic
Rule license: Elastic License v2
Setupedit
Setup
The Audit Security System Extension logging policy must be configured for (Success) Steps to implement the logging policy 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") and
not winlog.event_data.ServiceFileName : (
"C:\\Windows\\VeeamVssSupport\\VeeamGuestHelper.exe" or
"%SystemRoot%\\system32\\Drivers\\Crowdstrike\\17706-CsInstallerService.exe"
)
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Create or Modify System Process
- ID: T1543
- Reference URL: https://attack.mitre.org/techniques/T1543/
-
Sub-technique:
- Name: Windows Service
- ID: T1543.003
- Reference URL: https://attack.mitre.org/techniques/T1543/003/