macOS / Mach-O Reverse Engineering

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- Analyzing macOS binaries or suspected malware samples. - Inspecting entitlements, signatures, and ObjC/Swift structures.

Category: General & Miscellaneous
Repo: antigravity-awesome-skills
Path: skills/macos-reverse/SKILL.md
Updated: 8/28/2026, 8:47:44 AM

AI Summary

- Analyzing macOS binaries or suspected malware samples. - Inspecting entitlements, signatures, and ObjC/Swift structures. It is useful for general automation, multi-purpose workflows, cross-disciplinary tasks, and utility skills. Source: antigravity-awesome-skills (skills/macos-reverse/SKILL.md).

macOS / Mach-O Reverse Engineering

When to Use

  • Analyzing macOS binaries or suspected malware samples.
  • Inspecting entitlements, signatures, and ObjC/Swift structures.

适用场景

  • Mach-O 可执行文件 / dylib / framework
  • .app bundle、LaunchAgent/Daemon
  • Objective-C / Swift 符号与 runtime
  • 公证/签名、Hardened Runtime、TCC 相关行为分析
  • macOS 恶意软件静态/动态分析(联合 malware-analysis)

工作流

1. 包体与签名

file target
codesign -dv --verbose=4 target
spctl -a -vv target 2>&1
otool -L target

2. 静态

□ class-dump / swift-demangle / Hopper / Ghidra / IDA
□ 字符串与 XPC 服务名、TCC 敏感 API
□ LC_LOAD_dylib 依赖与 rpath

3. 动态

□ lldb / Frida
□ fs_usage / log stream 观察
□ 网络:联合 protocol-reverse 或代理

工具链

工具用途
otool / nm / codesign系统自带
Hopper / Ghidra / IDA反编译
class-dump / dsdumpObjC
Frida / lldb动态
jtool2Mach-O

参考

  • references/macho-triage.md
  • ../mobile-reverse/(iOS) ../ghidra-reverse/ ../malware-analysis/

路由上下文

上游: MASTER R31
下游: iOS → mobile-reverse;通用样本 → malware-analysis

任务完成自检

  • 是否记录签名/Hardened Runtime 状态?
  • 是否有地址级/符号级结论?
  • Checklist?

Limitations

  • Apple Silicon and hardened runtime add unpacking complexity.
  • Some analysis requires disabling SIP in a dedicated lab VM.

Adapted from zhaoxuya520/reverse-skill (MIT).

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