cmd_carry_out_string_command_parameter.yml

name: CMD Carry Out String Command Parameter
id: 54a6ed00-3256-11ec-b031-acde48001122
version: 3
date: '2022-01-18'
author: Teoderick Contreras, Bhavin Patel, Splunk
status: production
type: Hunting
description: The following analytic identifies command-line arguments where `cmd.exe
  /c` is used to execute a program. `cmd /c` is used to run commands in MS-DOS and
  terminate after command or process completion. This technique is commonly seen in
  adversaries and malware to execute batch command using different shell like PowerShell
  or different process other than `cmd.exe`. This is a good hunting query for suspicious
  command-line made by a script or relative process execute it.
data_source:
- Sysmon Event ID 1
search: '| tstats `security_content_summariesonly` min(_time) as firstTime max(_time)
  as lastTime from datamodel=Endpoint.Processes where `process_cmd` AND Processes.process="*
  /c *" by Processes.dest Processes.user Processes.parent_process Processes.process_name
  Processes.original_file_name Processes.process Processes.process_id Processes.parent_process_id
  | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
  | `cmd_carry_out_string_command_parameter_filter`'
how_to_implement: To successfully implement this search you need to be ingesting information
  on process that include the name of the process responsible for the changes from
  your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
  confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
  endpoint product.
known_false_positives: False positives may be high based on legitimate scripted code
  in any environment. Filter as needed.
references:
- https://thedfirreport.com/2021/10/18/icedid-to-xinglocker-ransomware-in-24-hours/
- https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
tags:
  analytic_story:
  - Data Destruction
  - IcedID
  - Log4Shell CVE-2021-44228
  - WhisperGate
  - Hermetic Wiper
  - Living Off The Land
  - Azorult
  - DarkCrystal RAT
  - ProxyNotShell
  - Qakbot
  - Chaos Ransomware
  - AsyncRAT
  asset_type: Endpoint
  confidence: 50
  cve:
  - CVE-2021-44228
  impact: 60
  message: An instance of $parent_process_name$ spawning $process_name$ was identified
    on endpoint $dest$ by user $user$ attempting spawn a new process.
  mitre_attack_id:
  - T1059.003
  - T1059
  observable:
  - name: dest
    type: Endpoint
    role:
    - Victim
  - name: user
    type: User
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  required_fields:
  - _time
  - Processes.parent_process_name
  - Processes.parent_process
  - Processes.process_name
  - Processes.process_id
  - Processes.process
  - Processes.dest
  - Processes.user
  - Processes.process_id
  - Processes.parent_process_id
  risk_score: 30
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/icedid/cmd_carry_str_param/sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog