coco-research/coco/browser-extension-reverse

Claude Code and agent skill by coco-research/coco

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Use for authorized reverse engineering of browser extensions (Chrome/Firefox) including manifest analysis, background workers, and extension-based credential or traffic logic recovery.

Install

npx vskill@latest install coco-research/coco/browser-extension-reverse

SKILL.md

Browser Extension Reverse Engineering

适用场景

  • Chrome/Edge MV2/MV3 扩展分析
  • Firefox 扩展
  • 恶意扩展 IOC、供应链扩展投毒调查
  • 扩展实现的签名/加密/代理逻辑还原

工作流

1. 包体
text
□ crx 解压 / 从 profile 取扩展目录
□ manifest.json：permissions、host_permissions、background、content_scripts
□ 评估过度权限（<all_urls>、webRequest、debugger）
2. 逻辑
text
□ service_worker / background 入口
□ content_script 注入点与世界（isolated）
□ chrome.storage / IndexedDB 密钥
□ 与 `js-reverse` 相同：Observe 网络与消息传递（runtime.sendMessage）
3. 动态
text
□ 开发者模式加载解压目录
□ chrome://extensions 检查错误
□ DevTools 附加 service worker
□ 必要时 Frida/浏览器 CDP（jshookmcp）

工具链

工具用途
解压/jqmanifest
Chrome DevToolsworker 调试
js-reverse 工具链深度 JS
YARA恶意扩展规则

参考

  • references/extension-analysis.md
  • ../js-reverse/ ../malware-analysis/

Security

  • Security scanPassed, 90 of 100Pattern checks on the skill's files.
  • Model reviewPassed

See the full security report

Quality evaluation

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Source

Popularity

Repository stars
427
Repository forks
12
7-day trend score
35

Stars and forks are for the whole GitHub repository, not this skill alone. Not refreshed yet.

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