.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）。
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Before installing skills in Cursor, ensure your development environment meets these requirements:
node --versiondotnet-reverseExecute the skills CLI command in your project's root directory to begin installation:
Package manager
npx skills install zhaoxuya520/reverse-skill/skills/dotnet-reverseFetches dotnet-reverse from zhaoxuya520/reverse-skill and configures it for Cursor.
The CLI shows a list of agents. Use arrow keys and space to select Cursor:
Confirm successful installation by checking the skill directory location:
Restart Cursor to activate dotnet-reverse. Access via /dotnet-reversein your agent's command palette.
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
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npx skills install zhaoxuya520/reverse-skill/skills/dotnet-reverseWorks with
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| name | dotnet-reverse |
| description | .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）。 |
| license | MIT |
| compatibility | Requires a filesystem-based code agent or CLI with shell access, Windows host preferred (dnSpyEx 是 Windows GUI)；Linux/macOS 可用 ILSpy/de4dot CLI + mono/dotnet runtime。 |
| allowed-tools | Bash Read Write Edit Glob Grep Task WebFetch WebSearch |
| metadata | user-invocable: "false" |
NOW: 用 DIE/file/CLR 头确认目标是 .NET 托管（否则 SWITCH 到 ida-reverse/ / reverse-engineering/）NOW: 若疑似混淆 → 先 de4dot 脱壳，产出 *-clean.exe，保留原始样本NEXT: dnSpyEx（或 dnSpy MCP / ilspycmd）静态：C# 浏览 + IL 视图看关键判断ACT: 需要明文/C2 时动态调试；需要改逻辑时 IL patch 优先于 C# 重编译当任务属于以下场景时优先使用本 skill：
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/。
#~ / #Strings 流 + mscoree _CorExeMain），再决定走 dnSpy 而非 IDAde4dot 脱一轮再做静态分析，否则字符串/控制流全是乱的dnspy_* 工具），优先走 MCP 面做 decompile / IL inspection，避免来回切 GUI| 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 |
| 混淆器识别 | Detect It Easy (DIE) / file | 先判断壳类型再决定 de4dot 参数 |
| 编程化操作 IL | dnlib | 写 C# 脚本批量改 metadata / 字符串解密器 |
| AI 直接操作 | dnSpy MCP | dnspy_decompile / dnspy_inspect_il 等工具面 |
前置：Windows 主机装 dnSpyEx + de4dot（choco 或 release）；Linux/macOS 用
ilspycmd+dotnet runtime。详见references/sharp-tools.md的安装矩阵。
确认目标是托管程序，别把 native PE 当 .NET 分析：
# Windows
file target.exe # "PE32 executable ... for MS Windows" 不够
# 关键：看有没有 CLR
powershell -c "[System.Reflection.AssemblyName]::GetAssemblyName('target.exe')"
# 或
dnSpyEx 直接拖进去 —— 能打开就是托管
# 通用
strings target.exe | grep -iE "mscoree|_CorExeMain|mscorlib|System\\."
.NET 识别标志：
Data Directory[14] (CLR Runtime Header) 非零mscoree.dll 导入 / _CorExeMain 入口#~、#Strings、#US、#GUID、#Blob metadata 流mscorlib / System.Private.CoreLib 字符串NativeAOT 例外： 编译成 native，没有 CLR 头，但有 System.Private.CoreLib 字符串和重构过的类型元数据 —— 这类走 reverse-engineering/（IDA/r2），本 skill 仅做识别提示。
# DIE 快速识别
diec target.exe # Detect It Easy CLI
# 或拖进 dnSpyEx，看是否大量乱码类名 / 控制流变形
常见混淆器 → 脱壳策略（详见 references/obfuscators.md）：
| 混淆器 | 特征 | de4dot 处理 |
|---|---|---|
| ConfuserEx (1.0.0 / 2.x) | <module> anti-tamper、控制流变形、字符串加密 | de4dot target.exe 通常自动识别 |
| SmartAssembly | circular/string encoding、资源压缩 | de4dot target.exe |
| Babel.NET | 方法体加密、控制流 | de4dot target.exe |
| Eazfuscator.NET | 字符串/资源加密 | de4dot，部分版本需手动 |
| .NET Reactor | anti-tamper + necrobit | de4dot，新版可能失败需手动 |
# de4dot 默认自动识别大多数壳
de4dot target.exe -o target-clean.exe
# 指定类型（自动识别失败时）
de4dot --type cfze target.exe # ConfuserEx
de4dot --type sa target.exe # SmartAssembly
# 多层混淆 / de4dot 报 unknown
de4dot --detect target.exe # 看它识别成什么
# 可能要先 patch anti-tamper 再 de4dot（见 references/obfuscators.md）
产出：target-clean.exe，后续分析用它。保留原始样本做对照。
dnSpyEx 加载脱壳后样本：
Main / Startup / 模块初始化器 (Module .cctor)flag、password、verify、check、encrypt、http、Config定位字符串 → 反向引用 → 找到使用它的方法 → IL 视图看判断逻辑
dnSpyEx 调试器：附加进程 / 启动调试，在关键方法下断点，观察运行时：
try/catch 隐藏真实路径）.NET 动态调试比 native 友好得多 —— 能直接看到对象值、字符串内容。优先动态而非死磕静态。
dnSpyEx → 右键方法 → Edit Method (C#) 或 Edit IL
- 改判断：ldc.i4.0 → ldc.i4.1（false→true）
- 改常量：直接编辑字符串/数字
- 删除校验：nop 掉整段
File → Save Module → 替换原文件
IL patch 可靠性 > C# patch：C# 重编译可能失败（缺引用、语法不对），IL 编辑几乎不会失真。详见 references/common-workflow.md。
用户说这些时进入本 skill：
reverse-engineering/ + seed-014_unity-il2cpp-reverse.md（IL2CPP 是 native，不走 dnSpy）reverse-engineering/（同上，native）reverse-engineering/ / ida-reverse/binary-diff/diagram-generator/上游入口: skills/SKILL.md（总控）、routing.md
下游出口:
reverse-engineering/ida-reverse/ / radare2/references/sharp-tools.md）同级关联模块:
reverse-engineering/languages-compiled.md（.NET 简介指向本模块）apk-reverse/（Xamarin/MAUI Android 逆向可切回本模块看 C# 层）Prerequisites
Time Estimate
15-45 minutes depending on use case complexity
Steps
Common Pitfalls
✓ Do
✗ Don't
💡 Pro Tips
✓ Use when
Use when skill capabilities match your task, clear ROI on time saved, and you can validate outputs. Best for repetitive tasks, learning, and quality improvement.
✗ Avoid when
Avoid when task requires deep expertise you can't validate, involves sensitive decisions, or when learning process is more valuable than speed of completion.
dotnet-reverse reduced setup friction for our internal harness; good balance of opinion and flexibility.
dotnet-reverse has been reliable in day-to-day use. Documentation quality is above average for community skills.
Registry listing for dotnet-reverse matched our evaluation — installs cleanly and behaves as described in the markdown.
dotnet-reverse fits our agent workflows well — practical, well scoped, and easy to wire into existing repos.
dotnet-reverse is among the better-maintained entries we tried; worth keeping pinned for repeat workflows.
Useful defaults in dotnet-reverse — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
Keeps context tight: dotnet-reverse is the kind of skill you can hand to a new teammate without a long onboarding doc.
I recommend dotnet-reverse for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
Useful defaults in dotnet-reverse — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
We added dotnet-reverse from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
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