IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« Windows Script Interpreter Executing Process via WMI Zoom Meeting with no Passcode »

› › ›

Windows Service Installed via an Unusual Client

edit

IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Windows Service Installed via an Unusual Client

edit

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: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
Windows
Threat Detection
Privilege Escalation

Version: 100 (version history)

Added (Elastic Stack release): 8.1.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

edit

Rule query

edit

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

Threat mapping

edit

Framework: MITRE ATT&CK^TM

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/

Rule version history

edit

Version 100 (8.5.0 release)

Formatting only

Version 3 (8.4.0 release)

Formatting only

« Windows Script Interpreter Executing Process via WMI Zoom Meeting with no Passcode »