name: CHCP Command Execution
id: 21d236ec-eec1-11eb-b23e-acde48001122
version: 1
date: '2021-07-27'
author: Teoderick Contreras, Splunk
type: TTP
datamodel:
- Endpoint
description: This search is to detect execution of chcp.exe application. this utility
  is used to change the active code page of the console. This technique was seen in
  icedid malware to know the locale region/language/country of the compromise host.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where Processes.process_name=chcp.com
  Processes.parent_process_name = cmd.exe Processes.parent_process=*/c* by  Processes.process_name
  Processes.process Processes.parent_process_name Processes.parent_process Processes.process_id
  Processes.parent_process_id Processes.dest Processes.user | `drop_dm_object_name(Processes)`
  | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `chcp_command_execution_filter`'
how_to_implement: To successfully implement this search, you need to be ingesting
  logs with the process name, parent process, and command-line executions from your
  endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
  Sysmon TA. Tune and filter known instances where renamed chcp.com may be used.
known_false_positives: other tools or script may used this to change code page to
  UTF-* or others
references:
- https://ss64.com/nt/chcp.html
- https://twitter.com/tccontre18/status/1419941156633329665?s=20
tags:
  analytic_story:
  - IcedID
  - Azorult
  confidence: 30
  context:
  - Source:Endpoint
  - Stage:Recon
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/icedid/simulated_icedid/windows-sysmon.log
  impact: 30
  kill_chain_phases:
  - Reconnaissance
  message: parent process $parent_process_name$ spawning chcp process $process_name$
    with parent command line $parent_process$
  mitre_attack_id:
  - T1059
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: user
    type: User
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - process_name
  - process
  - parent_process_name
  - parent_process
  - process_id
  - parent_process_id
  - dest
  - user
  risk_score: 9
  security_domain: endpoint
  asset_type: Endpoint