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Description

This search looks for arguments to sc.exe indicating the creation or modification of a Windows service.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Endpoint- Datasource: Splunk Add-on for Sysmon
  • Last Updated: 2020-07-21
  • Author: Rico Valdez, Splunk
  • ID: f0c693d8-2a89-4ce7-80b4-98fea4c3ea6d

Annotations

ATT&CK
ID Technique Tactic
T1543.003 Windows Service Persistence, Privilege Escalation
T1543 Create or Modify System Process Persistence, Privilege Escalation
Kill Chain Phase
  • Installation
NIST
  • PR.IP
  • PR.PT
  • PR.AC
  • PR.AT
  • DE.CM
CIS20
  • CIS 3
  • CIS 5
  • CIS 8
CVE
1
2
3
4
5
6
| tstats `security_content_summariesonly` values(Processes.process) as process min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where Processes.process_name = sc.exe (Processes.process="* create *" OR Processes.process="* config *") by Processes.process_name Processes.parent_process_name Processes.dest Processes.user 
| `drop_dm_object_name(Processes)` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `sc_exe_manipulating_windows_services_filter`

Macros

The SPL above uses the following Macros:

Note that sc_exe_manipulating_windows_services_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required field

  • _time
  • Processes.process_name
  • Processes.process
  • Processes.parent_process_name
  • Processes.dest
  • Processes.user

How To Implement

To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the Endpoint datamodel in the Processes node.

Known False Positives

Using sc.exe to manipulate Windows services is uncommon. However, there may be legitimate instances of this behavior. It is important to validate and investigate as appropriate.

Associated Analytic story

RBA

Risk Score Impact Confidence Message
56.0 70 80 A sc process $process_name$ with commandline $process$ to create of configure services in host $dest$

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: 4