name: XSL Script Execution With WMIC
id: 004e32e2-146d-11ec-a83f-acde48001122
version: 1
date: '2021-09-13'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This search is to detect a suspicious wmic.exe process or renamed wmic
  process to execute malicious xsl file. This technique was seen in FIN7 to execute
  its malicous jscript using the .xsl as the loader with the help of wmic.exe process.
  This TTP is really a good indicator for you to hunt further for FIN7 or other attacker
  that known to used this technique.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    OriginalFileName: wmic.exe
  selection2:
    Image|endswith: wmic.exe
  selection3:
    CommandLine: '*os get*'
  selection4:
    CommandLine: '*/format:*'
  selection5:
    CommandLine: '*.xsl*'
  condition: (selection1 or selection2) and selection3 and selection4 and selection5
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.
known_false_positives: unknown
references:
- https://www.mandiant.com/resources/fin7-pursuing-an-enigmatic-and-evasive-global-criminal-operation
- https://attack.mitre.org/groups/G0046/
- https://web.archive.org/web/20190814201250/https://subt0x11.blogspot.com/2018/04/wmicexe-whitelisting-bypass-hacking.html
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1220/T1220.md#atomic-test-3---wmic-bypass-using-local-xsl-file
tags:
  analytic_story:
  - FIN7
  - Suspicious WMI Use
  asset_type: Endpoint
  confidence: 70
  impact: 70
  message: An instance of $parent_process_name$ spawning $process_name$ was identified
    on endpoint $dest$ by user $user$ utilizing wmic to load a XSL script.
  mitre_attack_id:
  - T1220
  observable:
  - name: user
    type: User
    role:
    - Victim
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: parent_process_name
    type: Process
    role:
    - Parent Process
  - name: process_name
    type: Process
    role:
    - Child Process
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 49
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/fin7/fin7_macro_js_1/sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog