mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Eric McGinnis
59 lines
3.9 KiB
YAML
59 lines
3.9 KiB
YAML
name: Disabling CMD Application
|
|
id: ff86077c-9212-11eb-a1e6-acde48001122
|
|
version: 17
|
|
creation_date: '2021-03-31'
|
|
modification_date: '2026-05-13'
|
|
author: Teoderick Contreras, Splunk, Steven Dick
|
|
status: production
|
|
type: TTP
|
|
description: The following analytic detects modifications to the registry that disable the CMD prompt application. It leverages data from the Endpoint.Registry data model, specifically looking for changes to the "DisableCMD" registry value. This activity is significant because disabling CMD can hinder an analyst's ability to investigate and remediate threats, a tactic often used by malware such as RATs, Trojans, or Worms. If confirmed malicious, this could prevent security teams from using CMD for directory and file traversal, complicating incident response and allowing the attacker to maintain persistence.
|
|
data_source:
|
|
- Sysmon EventID 13
|
|
search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Registry WHERE (Registry.registry_path= "*\\SOFTWARE\\Policies\\Microsoft\\Windows\\System\\DisableCMD" Registry.registry_value_data = "0x00000001") by Registry.action Registry.dest Registry.process_guid Registry.process_id Registry.registry_hive Registry.registry_path Registry.registry_key_name Registry.registry_value_data Registry.registry_value_name Registry.registry_value_type Registry.status Registry.user Registry.vendor_product | `drop_dm_object_name(Registry)` | where isnotnull(registry_value_data) | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `disabling_cmd_application_filter`'
|
|
how_to_implement: To successfully implement this search, you need to be ingesting logs with the registry value name, registry path, and registry value data from your endpoints. If you are using Sysmon, you must have at least version 2.0 of the official Sysmon TA. https://splunkbase.splunk.com/app/5709
|
|
known_false_positives: admin may disable this application for non technical user.
|
|
references:
|
|
- https://any.run/report/ea4ea08407d4ee72e009103a3b77e5a09412b722fdef67315ea63f22011152af/a866d7b1-c236-4f26-a391-5ae32213dfc4#registry
|
|
drilldown_searches:
|
|
- name: View the detection results for - "$user$" and "$dest$"
|
|
search: '%original_detection_search% | search user = "$user$" dest = "$dest$"'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
- name: View risk events for the last 7 days for - "$user$" and "$dest$"
|
|
search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$user$", "$dest$") | stats count min(_time) as firstTime max(_time) as lastTime values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories) as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic) as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`'
|
|
earliest_offset: 7d
|
|
latest_offset: "0"
|
|
finding:
|
|
title: The Windows command prompt was disabled on $dest$ by $user$.
|
|
entity:
|
|
field: user
|
|
type: user
|
|
score: 50
|
|
intermediate_findings:
|
|
entities:
|
|
- field: dest
|
|
type: system
|
|
score: 50
|
|
message: The Windows command prompt was disabled on $dest$ by $user$.
|
|
analytic_story:
|
|
- Windows Defense Evasion Tactics
|
|
- Windows Registry Abuse
|
|
- NjRAT
|
|
asset_type: Endpoint
|
|
mitre_attack_id:
|
|
- T1112
|
|
- T1685
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
category: endpoint
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log
|
|
source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
|
|
sourcetype: XmlWinEventLog
|
|
test_type: unit
|