splunk-security_content/docs/_posts/2021-03-31-disable_registry_tool.md

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Disable Registry Tool	Disable or Modify Tools, Impair Defenses	Endpoint	2021-03-31	true		Disable or Modify Tools Defense Evasion Impair Defenses Defense Evasion Splunk Enterprise Splunk Enterprise Security Splunk Cloud Endpoint

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Description

This search identifies modification of registry to disable the regedit or registry tools of the windows operating system. Since registry tool is a swiss knife in analyzing registry, malware such as RAT or trojan Spy disable this application to prevent the removal of their registry entry such as persistence, file less components and defense evasion.

• Type: TTP
• Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
• Datamodel: Endpoint
• Last Updated: 2021-03-31
• Author: Teoderick Contreras, Splunk
• ID: cd2cf33c-9201-11eb-a10a-acde48001122

ATT&CK

ID	Technique	Tactic
T1562.001	Disable or Modify Tools	Defense Evasion

| T1562 | Impair Defenses | Defense Evasion |

Search

| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Registry where Registry.registry_path= "*\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Policies\\System\\DisableRegistryTools" Registry.registry_value_data = "0x00000001" by Registry.registry_path Registry.registry_key_name Registry.registry_value_data Registry.dest 
| `drop_dm_object_name(Registry)` 
| `security_content_ctime(firstTime)` 
|`security_content_ctime(lastTime)` 
| `disable_registry_tool_filter`

Associated Analytic Story

• Windows Defense Evasion Tactics

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 Registry node. Also make sure that this registry was included in your config files ex. sysmon config to be monitored.

Required field

• _time
• Registry.registry_key_name
• Registry.registry_path
• Registry.user
• Registry.dest
• Registry.registry_value_name

Kill Chain Phase

• Exploitation

Known False Positives

admin may disable this application for non technical user.

RBA

Risk Score	Impact	Confidence	Message
40.0	40	100	Disabled Registry Tools on dest

Reference

• https://any.run/report/ea4ea08407d4ee72e009103a3b77e5a09412b722fdef67315ea63f22011152af/a866d7b1-c236-4f26-a391-5ae32213dfc4#registry

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

• https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-security.log
• https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-system.log
• https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log

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