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C2 Evasion Methodology

OrganizationPopular
wgpsec
c2-evasion-methodology

C2框架免杀方法论:分析 C2 源码、搜索检测规则(YARA/Sigma/Snort)、逐规则分析、修改源码绕过检测。当遇到 YARA/Sigma/Snort 规则触发告警、beacon/implant 被杀软检测到时使用。第一步:确认 implant/beacon 语言和架构;第二步:搜索对应检测规则并逐规则分析修改

Overview

Publisherwgpsec
RepositoryAboutSecurity
Skill namec2-evasion-methodology
Stars
1.8K
Forks
247
Bundled files
9
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 9 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by wgpsec on GitHub. Read the source before you install it.

Installation

Install the C2 Evasion Methodology AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
    https://github.com/wgpsec/AboutSecurity/tree/master/skills/evasion/c2-evasion-methodology
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/wgpsec/AboutSecurity.git /tmp/AboutSecurity
mkdir -p .claude/skills
cp -r /tmp/AboutSecurity/skills/evasion/c2-evasion-methodology .claude/skills/c2-evasion-methodology
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable C2 Evasion Methodology in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads C2 Evasion Methodology on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so C2 Evasion Methodology is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

C2 框架免杀方法论

深入参考

以下参考资料按需加载,到达对应 Phase 时读取:

Phase参考文档用途
2references/detection-search.mdYARA/Sigma/网络规则搜索命令
3references/rule-analysis.md逐规则分析与免杀策略制定
3.5references/hex-analysis.mdHex 模式深度分析
3.6references/binary-analysis.md二进制资产(shellcode/资源/配置)分析
3.7references/string-search.md敏感字符串主动搜索
4references/source-modify.md源码修改模式与编译器标志

6 步决策流程

Phase 1: 识别 C2 组件
├─ 找到 implant/beacon/agent 目录
└─ 识别语言(C/Go/Rust/Python)

Phase 2: 检测规则搜索 → ⛔必读 references/detection-search.md
├─ YARA 规则(VirusTotal/GitHub/Elastic/ESET)
├─ Sigma 规则(日志行为检测)
└─ 网络规则(Snort/Suricata/Zeek)

Phase 3: 逐规则分析 → ⛔必读 references/rule-analysis.md
├─ 解析每个 $s1/$a1/hex pattern
├─ 定位源码中产生该 pattern 的位置
├─ 制定免杀策略(优先级: 编译器标志 > 构建配置 > 源码修改 > 重构)
│
├─ Phase 3.5: Hex 分析 → references/hex-analysis.md
├─ Phase 3.6: 二进制资产 → references/binary-analysis.md
└─ Phase 3.7: 字符串搜索 → references/string-search.md

Phase 4: 靶向修改 → ⛔必读 references/source-modify.md
├─ ⛔ 编译器标志优先!(-O2, -fomit-frame-pointer, -fno-ident)
├─ 字符串混淆(XOR 加密)
├─ 函数重命名
└─ Makefile/构建链修改

Phase 5: 验证
└─ grep 确认所有检测 pattern 已消除

Phase 6: 文档
└─ 生成 modifications_summary.md

优先级框架

优先级组件动作
1 (最高)Implant/Beacon/Agent 二进制必须修改
2 (高)网络特征暴露必须修改
3 (跳过)内部字符串(不影响检测)可跳过

免杀策略决策矩阵

Pattern 类型编译器标志源码修改两者都需要
函数序言(prologue)✅ 通常足够✅ 备选少见
字符串字节❌ 无效✅ 必须—
API 调用序列⚠️ 可能有效✅ 必须有时
配置结构体❌ 无效✅ 必须—

字符串混淆

  • 混淆后必须验证:编译通过、功能正常、不影响运行
  • 自动化处理:脚本批量替换,非手动逐个修改

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the C2 Evasion Methodology AI skill do?

C2框架免杀方法论:分析 C2 源码、搜索检测规则(YARA/Sigma/Snort)、逐规则分析、修改源码绕过检测。当遇到 YARA/Sigma/Snort 规则触发告警、beacon/implant 被杀软检测到时使用。第一步:确认 implant/beacon 语言和架构;第二步:搜索对应检测规则并逐规则分析修改

Why use C2 Evasion Methodology on TypingMind?

Because you install it once and use it with any model. C2 Evasion Methodology is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install C2 Evasion Methodology in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/wgpsec/AboutSecurity/tree/master/skills/evasion/c2-evasion-methodology. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use C2 Evasion Methodology?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with C2 Evasion Methodology?

As many as you like. As long as a model supports skills, you can use C2 Evasion Methodology with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the C2 Evasion Methodology AI skill free?

It is published on GitHub by wgpsec. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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