name: Revil Common Exec Parameter
id: 85facebe-c382-11eb-9c3e-acde48001122
version: 2
date: '2021-06-02'
author: Teoderick Contreras, Splunk
status: production
type: TTP
description: This analytic identifies suspicious commandline parameter that are commonly
  used by REVIL ransomware to encrypts the compromise machine.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    CommandLine:
    - '* -nolan *'
    - '* -nolocal *'
    - '* -fast *'
    - '* -full *'
  condition: selection1
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: third party tool may have same command line parameters as revil
  ransomware.
references:
- https://krebsonsecurity.com/2021/05/a-closer-look-at-the-darkside-ransomware-gang/
- https://www.mcafee.com/blogs/other-blogs/mcafee-labs/mcafee-atr-analyzes-sodinokibi-aka-revil-ransomware-as-a-service-what-the-code-tells-us/
tags:
  analytic_story:
  - Ransomware
  - Revil Ransomware
  asset_type: Endpoint
  confidence: 90
  impact: 60
  message: A process $process_name$ with commandline $process$ related to revil ransomware
    in host $dest$
  mitre_attack_id:
  - T1204
  observable:
  - name: dest
    type: Hostname
    role:
    - Victim
  - name: user
    type: User
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 54
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/revil/inf1/windows-sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog