analyzing-windows-driver-malware

analyzing-windows-driver-malware is a skill for Claude Code, Codex from meltedinhex/analyst-ai-pack. It costs 79 tokens per session (724 once invoked), scanned A, original, Apache-2.0.

A static-analysis workflow for examining Windows kernel drivers, which are low-level programs that can control or interact closely with the operating system.

In plain words
What is it for?
Use it to identify the driver entry point, request handlers, device-control interfaces, arbitrary memory access, callbacks, signing status, and possible bring-your-own-vulnerable-driver risks.
Why use it?
It helps reveal whether a .sys file may enable deep system access, privilege escalation, or stealth without loading potentially dangerous kernel code.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to identify the driver entry point, request handlers, device-control interfaces, arbitrary memory access, callbacks, signing status, and possible bring-your-own-vulnerable-driver risks.

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Install with agentmods
npx agentmods add skills/meltedinhex/analyst-ai-pack/analyzing-windows-driver-malware
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add meltedinhex/analyst-ai-pack --skill analyzing-windows-driver-malware
Clone the repo
git clone --depth 1 https://github.com/meltedinhex/analyst-ai-pack

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for analyzing-windows-driver-malware

README.md
[![agentmods](https://agentmods.dev/badge/skills/meltedinhex/analyst-ai-pack/analyzing-windows-driver-malware.svg)](https://agentmods.dev/skills/meltedinhex/analyst-ai-pack/analyzing-windows-driver-malware)
Your own site
<a href="https://agentmods.dev/skills/meltedinhex/analyst-ai-pack/analyzing-windows-driver-malware"><img src="https://agentmods.dev/badge/skills/meltedinhex/analyst-ai-pack/analyzing-windows-driver-malware.svg" alt="Measured on agentmods" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 724 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00079 $0.00724
Opus 5 $0.00039 $0.00362
Sonnet 5 $0.00016 $0.00145
Haiku 4.5 $0.00008 $0.00072

Measured 8d ago against content hash f4bfea0346cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

analyzing-windows-driver-malware scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/analyst.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/analyzing-windows-driver-malware/SKILL.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Analyzing Windows Driver Malware

When to Use

  • You have a .sys kernel driver (malicious rootkit driver or a vulnerable driver used for BYOVD) and need to identify its entry, IRP/IOCTL handlers, and dangerous kernel operations.
  • You are assessing privilege-escalation or kernel-stealth risk.

Do not use this by loading the driver — analyze it statically. Loading kernel code is dangerous and is the threat itself.

Prerequisites

  • The driver .sys (read inertly).

Safety & Handling

  • Read bytes statically; never install/load the driver. Note its signing status for BYOVD context.

Workflow

Step 1: Confirm it is a kernel driver

python scripts/analyst.py inspect driver.sys

Verifies the PE native subsystem (1), kernel imports (ntoskrnl.exe, hal.dll), and reports imported kernel APIs.

Step 2: Identify dispatch and dangerous primitives

Flag IRP/IOCTL handling (IoCreateDevice, IoCreateSymbolicLink, IRP_MJ_DEVICE_CONTROL), arbitrary read/write primitives (MmMapIoSpace, ZwMapViewOfSection, MmCopyMemory), and callback registration (PsSetCreateProcessNotifyRoutine, ObRegisterCallbacks).

Step 3: Assess BYOVD/stealth potential

Map exposed IOCTLs to capabilities (physical memory access, process kill, token theft) that BYOVD abuse relies on.

Step 4: Document

Record the driver's handlers, dangerous primitives, signing status, and risk.

Validation

  • Native subsystem and kernel imports confirm a driver.
  • Dispatch/IOCTL and dangerous-primitive imports are reported with evidence.
  • Capabilities are tied to concrete imported APIs.

Pitfalls

  • Legitimate vendor drivers that are nonetheless exploitable (BYOVD) — context matters.
  • Drivers resolving APIs dynamically, hiding imports.
  • Confusing user-mode helper components with the kernel driver itself.

References

Read the full file on GitHub · 91 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago First seen · 91 lines · 79 tokens per session scan A f4bfea0346cc

Subscribe to this mod's changes

analyzing-windows-driver-malware is a skill published in the GitHub repository meltedinhex/analyst-ai-pack (22 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 79 tokens to every session and 724 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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