splunk-security_content/detections/endpoint/script_execution_via_wmi.yml

name: Script Execution via WMI
id: aa73f80d-d728-4077-b226-81ea0c8be589
version: 4
date: '2020-03-16'
author: Rico Valdez, Michael Haag, Splunk
type: TTP
datamodel:
- Endpoint
description: This search looks for scripts launched via WMI.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where Processes.process_name=scrcons.exe
  by Processes.dest Processes.user Processes.parent_process Processes.process_name
  Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
  | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `script_execution_via_wmi_filter` '
how_to_implement: You must be ingesting endpoint data that tracks process activity,
  including parent-child relationships from your endpoints to populate the Endpoint
  data model in the Processes node. The command-line arguments are mapped to the "process"
  field in the Endpoint data model.
known_false_positives: Although unlikely, administrators may use wmi to launch scripts
  for legitimate purposes. Filter as needed.
references:
- https://redcanary.com/blog/child-processes/
tags:
  analytic_story:
  - Suspicious WMI Use
  asset_type: Endpoint
  automated_detection_testing: passed
  cis20:
  - CIS 3
  - CIS 5
  confidence: 60
  context:
  - source:endpoint
  - stage: Execution
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1047/execution_scrcons/windows-sysmon.log
  impact: 60
  kill_chain_phases:
  - Actions on Objectives
  message: A wmic.exe process $process_name$ taht execute script in host $dest$
  mitre_attack_id:
  - T1047
  nist:
  - PR.PT
  - PR.AT
  - PR.AC
  - PR.IP
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: user
    type: user
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.process_name
  - Processes.user
  - Processes.dest
  risk_score: 36
  security_domain: endpoint