Detectionhighexperimental

Windows Vulnerable Driver Blocklist Disabled

Detects when the Windows Vulnerable Driver Blocklist is set to disabled. This setting is crucial for preventing the loading of known vulnerable drivers, and its modification may indicate an attempt to bypass security controls. It is often targeted by threat actors to facilitate the installation of malicious or vulnerable drivers, particularly in scenarios involving Endpoint Detection and Response (EDR) bypass techniques. This rule applies to systems that support the Vulnerable Driver Blocklist feature, including Windows 10 version 1903 and later, and Windows Server 2022 and later. Note that this change will require a reboot to take effect, and this rule only detects the registry modification action.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Swachchhanda Shrawan Poudel (Nextron Systems)Created Mon Jan 26d526c60a-e236-4011-b165-831ffa52ab70windows

Log Source

WindowsRegistry Set

ProductWindows← raw: windows

CategoryRegistry Set← raw: registry_set

Detection Logic

detection:
    selection:
        TargetObject|endswith: '\Control\CI\Config\VulnerableDriverBlocklistEnable'
        Details: 'DWORD (0x00000000)'
    condition: selection

False Positives

Unlikely and should be investigated immediately.

References

Testing & Validation

Regression Tests

by Swachchhanda Shrawan Poudel (Nextron Systems)

Positive Detection Test1 matchevtx

Microsoft-Windows-Sysmon

EVTX JSON

MITRE ATT&CK

Tactics

TA0005 · Defense Evasion

Sub-techniques

T1562.001 · Disable or Modify Tools

Related Rules

SimilarDetectionhigh

Vulnerable Driver Blocklist Registry Tampering Via CommandLine

Detects tampering of the Vulnerable Driver Blocklist registry via command line tools such as PowerShell or REG.EXE. The Vulnerable Driver Blocklist is a security feature that helps prevent the loading of known vulnerable drivers. Disabling this feature may indicate an attempt to bypass security controls, often targeted by threat actors to facilitate the installation of malicious or vulnerable drivers, particularly in scenarios involving Endpoint Detection and Response

Detects similar activity. Both rules may fire on overlapping events.

Rule Metadata

Rule ID

d526c60a-e236-4011-b165-831ffa52ab70

Status

experimental

Level

high

Type

Detection

Created

Mon Jan 26

Author

Swachchhanda Shrawan Poudel (Nextron Systems)

Path

rules/windows/registry/registry_set/registry_set_vulnerable_driver_blocklist_disable.yml

Raw Tags

attack.defense-evasionattack.t1562.001

View on GitHub