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Description

The search looks for reg.exe modifying registry keys that define Windows services and their configurations.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Endpoint
  • Last Updated: 2020-11-26
  • Author: Rico Valdez, Splunk
  • ID: 8470d755-0c13-45b3-bd63-387a373c10cf

ATT&CK

ID Technique Tactic
T1574.011 Services Registry Permissions Weakness Persistence, Privilege Escalation, Defense Evasion
T1574 Hijack Execution Flow Persistence, Privilege Escalation, Defense Evasion

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime values(Processes.process_name) as process_name values(Processes.parent_process_name) as parent_process_name values(Processes.user) as user FROM datamodel=Endpoint.Processes where Processes.process_name=reg.exe Processes.process=*reg* Processes.process=*add* Processes.process=*Services* by Processes.process_id Processes.dest Processes.process 
| `drop_dm_object_name("Processes")` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `reg_exe_manipulating_windows_services_registry_keys_filter`

Associated Analytic Story

How To Implement

To successfully implement this search, you must be ingesting data that records registry activity from your hosts to populate the endpoint data model in the registry node. This is typically populated via endpoint detection-and-response product, such as Carbon Black or endpoint data sources, such as Sysmon. The data used for this search is typically generated via logs that report reads and writes to the registry.

Required field

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

Kill Chain Phase

  • Installation

Known False Positives

It is unusual for a service to be created or modified by directly manipulating the registry. However, there may be legitimate instances of this behavior. It is important to validate and investigate, as appropriate.

RBA

Risk Score Impact Confidence Message
45.0 75 60 A reg.exe process $process_name$ with commandline $process$ 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: 5