dotnet-reverse SKILL.md skillA

dotnet-reverse from coco-research/coco is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add coco-research/coco/dotnet-reverse@git:20260914.480426e

Pins git:20260914.480426e in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: coco-research/coco
Path: systems/reverse-skill/skills/dotnet-reverse/SKILL.md
Versions recorded: 1
Latest version: git:20260914.480426e, committed Sep 14, 2026
Size: 8,171 bytes
Repository stars: 827
License: a license file GitHub does not identify

.NET / C# 二进制逆向。当目标是 .NET assembly（PE 头含 CLR、.exe/.dll 托管程序）、C# 编译产物（含 NativeAOT）、红队 Sharp* 工具（Rubeus / SharpHound / SharpHound 等）、.NET 混淆程序（ConfuserEx / SmartAssembly / Babel / Eazfuscator）、.NET loader / info-stealer / 套壳 malware 时使用。优先用 dnSpyEx + de4dot，需要 AI 直接操作时联动 dnSpy MCP。不用于纯 native 二进制（走 reverse-engineering / ida-reverse）。.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# .NET / C# 逆向作业规范

## 适用范围

当任务属于以下场景时优先使用本 skill：

- 识别并逆向 .NET / C# 编译产物（托管 PE / .exe / .dll）
- 分析红队 Sharp* 工具链（Rubeus、SharpHound、SharpShell 等）
- 脱混淆 ConfuserEx / SmartAssembly / Babel / Eazfuscator / .NET Reactor 等壳
- 逆向 .NET loader / info-stealer / RAT 的解密与 C2 逻辑
- 对 C# 程序做 patch（改判断、改常量、keygen）
- 分析 IL2CPP 之前的 Mono/Unity 托管层（注意：IL2CPP 编译后是 native，走 `reverse-engineering/` + seed-014）

如果目标是纯 native 二进制（C/C++/Go/Rust 编译、无 CLR），请改用 `reverse-engineering/`、`ida-reverse/` 或 `radare2/`。

## 核心原则

- **先识别再下手**：先确认是 .NET 托管程序（PE 头 CLR + `#~` / `#Strings` 流 + mscoree `_CorExeMain`），再决定走 dnSpy 而非 IDA
- **IL 优先于 C#**：dnSpyEx 的 C# 反编译器会丢失/扭曲信息（编译器生成的状态机、async/await、yield），关键判断与 patch 必须切到 **IL 编辑器**，C# 视图只用于快速浏览
- **de4dot 先行**：遇到混淆器先 `de4dot` 脱一轮再做静态分析，否则字符串/控制流全是乱的
- **MCP 联动**：环境里若注册了 dnSpy MCP（`dnspy_*` 工具），优先走 MCP 面做 decompile / IL inspection，避免来回切 GUI
- **证据化输出**：脱混淆产物、提取的配置/C2/key、patch diff 都要落盘

## 工具链映射

| 能力 | 首选 | 备注 |
|------|------|------|
| 反编译 + 调试 + patch | **dnSpyEx** | 王牌，唯一带 IL 编辑器的 GUI；老 dnSpy 已停更，用 Ex 分支 |
| 轻量 CLI / headless 反编译 | **ILSpy** (`ilspycmd`) | 适合批量、脚本化、Linux/macOS |
| 脱混淆 | **de4dot** | ConfuserEx 全家桶、SmartAssembly 等主流壳的默认解 |
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add coco-research/coco/dotnet-reverse@sha256:d816c8ccc5414f04

The line at the top of this page pins the label git:20260914.480426e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_5fg6yx4ipp25zarl.svg)](https://markdownregistry.com/a/art_5fg6yx4ipp25zarl)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Sep 14, 2026.

version	committed	commit	size	audit
git:20260914.480426e latest	2026-09-14	480426e	8,171 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (8171 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

coco-research/coco · 827 stars · license a license file GitHub does not identify · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_5fg6yx4ipp25zarl
GET https://markdownregistry.com/api/v1/resolve?ref=coco-research/coco/dotnet-reverse
GET https://markdownregistry.com/api/v1/blob/d816c8ccc5414f0400112aa0d38ebb0ec35738680d0a3128c6d6deaf777a093a

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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