uninstall_app_using_msiexec.yml

name: Uninstall App Using MsiExec
id: 1fca2b28-f922-11eb-b2dd-acde48001122
version: 1
date: '2021-08-09'
author: Teoderick Contreras, Splunk
type: TTP
datamodel:
- Endpoint
description: This search is to detect a suspicious un-installation of application
  using msiexec. This technique was seen in conti leak tool and script where it tries
  to uninstall AV product using this commandline. This commandline to uninstall product
  is not a common practice in enterprise network.
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where Processes.process_name=msiexec.exe
  Processes.process= "* /qn *" Processes.process= "*/X*" Processes.process= "*REBOOT=*"
  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)` | `uninstall_app_using_msiexec_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.
known_false_positives: unknown.
references:
- https://threadreaderapp.com/thread/1423361119926816776.html
tags:
  analytic_story:
  - Ransomware
  automated_detection_testing: passed
  confidence: 60
  context:
  - Source:Endpoint
  - Stage:Execution
  dataset:
  - https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/conti/conti_leak/windows-sysmon.log
  impact: 50
  kill_chain_phases:
  - Exploitation
  message: process $process_name$ with a cmdline $process$ in host $dest$
  mitre_attack_id:
  - T1218.007
  - T1218
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: process_name
    type: process name
    role:
    - Attacker
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.dest
  - Processes.user
  - Processes.parent_process
  - Processes.parent_process_name
  - Processes.process_name
  - Processes.process
  - Processes.process_id
  - Processes.parent_process_id
  risk_score: 30
  security_domain: endpoint