Detection rules › Splunk
Defender Registry Values Modified (PowerShell)
Adversaries may interact with the Windows Registry to disable security tools to avoid possible detection of their malware/tools and activities. They may interact directly with the registry via command line interpreters or they may abuse system utilities to achieve the same goals, such as SystemSettingsAdminFlows.exe. This use case detects commands for registry modifications targeting Windows Defender capabilities.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | |
| Defense Impairment |
References
Telemetry coverage
Rule body
id: '31402.56383'
title: Defender Registry Values Modified
description: Adversaries may interact with the Windows Registry to disable security
tools to avoid possible detection of their malware/tools and activities. They may
interact directly with the registry via command line interpreters or they may abuse
system utilities to achieve the same goals, such as SystemSettingsAdminFlows.exe.
This use case detects commands for registry modifications targeting Windows Defender
capabilities.
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4103) OR
"<EventID>4103<") OR (TERM(EventCode=4104) OR "<EventID>4104<") "Defender" (("DisableEnhancedNotifications"
OR "RTP") "1") OR (("SubmitSamplesConsent" OR "SpynetReporting") "0") OR (("Set-ItemProperty"
OR "sp " OR "ADD ") ("SOFTWARE\\Microsoft\\Windows Defender\\Reporting" OR "SOFTWARE\\Microsoft\\Windows
Defender\\Spynet" OR "SOFTWARE\\Microsoft\\Windows Defender\\Real-Time Protection")))
| table _time, host, user, process | bin span=1s | stats values(*) as * by _time,
host '
techniques:
- defense-evasion:modify registry
- defense-evasion:impair defenses:disable or modify tools
technique_id:
- T1112
- T1562.001
data_category:
- PowerShell logs
references:
- https://attack.mitre.org/techniques/T1562/001/
- https://attack.mitre.org/techniques/T1112/
- https://www.huntress.com/blog/lolbin-to-inc-ransomware