Try in Splunk Security Cloud

Description

The following analytc uses Windows Event Id 7045, New Service Was Installed, to identify the creation of a Windows Service where the service binary path is located in public paths. This behavior could represent the installation of a malicious service. Red Teams and adversaries alike may create malicious Services for lateral movement or remote code execution

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2021-11-22
  • Author: Mauricio Velazco, Splunk
  • ID: 3abb2eda-4bb8-11ec-9ae4-3e22fbd008af

ATT&CK

ID Technique Tactic
T1543 Create or Modify System Process Persistence, Privilege Escalation
T1543.003 Windows Service Persistence, Privilege Escalation
`wineventlog_system` EventCode=7045  Service_File_Name = "*\.exe" NOT (Service_File_Name IN ("C:\\Windows\\*", "C:\\Program File*", "C:\\Programdata\\*", "%systemroot%\\*")) 
| stats count min(_time) as firstTime max(_time) as lastTime by ComputerName EventCode Service_File_Name Service_Name Service_Start_Type Service_Type 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `windows_service_created_within_public_path_filter`

Associated Analytic Story

How To Implement

To successfully implement this search, you need to be ingesting logs with the Service name, Service File Name Service Start type, and Service Type from your endpoints.

Required field

  • EventCode
  • Service_File_Name
  • Service_Type
  • _time
  • Service_Name
  • Service_Start_Type

Kill Chain Phase

  • Lateral Movement

Known False Positives

Legitimate applications may install services with uncommon services paths.

RBA

Risk Score Impact Confidence Message
54.0 90 60 A Windows Service $Service_File_Name$ with a public path was created on $ComputerName

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

source | version: 1