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Sig for installing kernel service driver#529

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kevross33 wants to merge 2 commits intoCAPESandbox:masterfrom
kevross33:patch-93
Open

Sig for installing kernel service driver#529
kevross33 wants to merge 2 commits intoCAPESandbox:masterfrom
kevross33:patch-93

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@kevross33
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@kevross33 kevross33 commented Feb 23, 2026

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Summary of Changes

Hello @kevross33, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new security signature designed to identify the installation of kernel driver services. This enhancement aims to improve the detection of sophisticated threats like Bring Your Own Vulnerable Driver (BYOVD) attacks and rootkits by monitoring specific Windows API calls for driver service creation.

Highlights

  • New Signature for Kernel Driver Service Installation: Introduced the InstallKernelDriverService signature to detect the creation of new kernel driver services, which is indicative of Bring Your Own Vulnerable Driver (BYOVD) attacks or rootkits.
  • Enhanced Threat Detection: The new signature monitors CreateServiceA and CreateServiceW API calls, specifically looking for services configured as SERVICE_KERNEL_DRIVER and associated with .sys binary paths.

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Changelog
  • modules/signatures/windows/driver_load.py
    • Added a new signature class InstallKernelDriverService to detect kernel driver service installations.
    • Removed an unnecessary blank line for minor code cleanup.
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Code Review

This pull request introduces a new signature, InstallKernelDriverService, to detect the installation of a new kernel driver service, which can be an indicator of malicious activity like BYOVD attacks or rootkits. The implementation is sound, but I've provided a few suggestions to improve code clarity, consistency, and correctness. My feedback includes refactoring the main logic for conciseness, renaming a variable for better readability, correcting a TTP reference, and addressing minor style issues like trailing whitespace.

if binary_path and binary_path.lower().endswith(".sys"):
self.ret = True
self.mark_call()

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medium

This line contains trailing whitespace and is unnecessary. Please remove it to improve code style.

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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