New to Claude Skills? Learn how to install them →

zhaoxuya520 on GitHub

Mobile Reverse Engineering

Free

Streamline authorized app reverse engineering and security testing.

Get this skill

Free · Opens the source repo

What Mobile Reverse Engineering does

Mobile Reverse Engineering is a skill designed for developers and security testers who need to analyze and test the security of mobile applications on both Android and iOS platforms. This skill facilitates authorized reverse engineering of APKs and IPAs, allowing users to perform tasks such as runtime instrumentation, SSL pinning bypass, and platform protection checks. By leveraging a comprehensive workflow, it helps users gather information, conduct static and dynamic analysis, and perform network analysis effectively.

The skill guides users through a structured four-phase workflow: information gathering, static analysis, dynamic analysis, and network analysis. Each phase includes specific commands and tools tailored for both Android and iOS applications, ensuring users can extract relevant data and assess the security posture of the applications they are testing. The integration of tools like Frida, Objection, and Burp Suite enhances the skill's capabilities, making it a valuable resource for penetration testers and security researchers.

Whether you are extracting encryption keys from mobile applications or bypassing security mechanisms such as SSL pinning and root detection, this skill provides the necessary guidance and commands to achieve your objectives. It is particularly useful in environments where applications are not rooted or jailbroken, allowing for thorough testing without compromising device integrity.

Overall, Mobile Reverse Engineering is an essential tool for authorized security testing of mobile applications, providing a clear path for users to follow while ensuring compliance with ethical guidelines.

When to use it

Use this skill when conducting authorized security assessments of mobile applications on Android and iOS platforms.

When not to use it

This skill is not suitable for unauthorized reverse engineering or when working with applications that do not allow for ethical testing.

What you can build with it

Testing an Android App

Use this skill to reverse engineer an Android APK, analyze its permissions, and check for security vulnerabilities.

Assessing an iOS Application

Utilize the skill to perform dynamic analysis on an iOS IPA, bypass SSL pinning, and extract sensitive data.

Conducting Penetration Testing

Implement the skill during a penetration test to evaluate the security of mobile applications in a controlled environment.

How to install Mobile Reverse Engineering

View source

1. Install with the skills CLI

npx skills add zhaoxuya520/reverse-skill/mobile-reverse --agent claude-code

2. Or install it manually

Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.

Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs

Inside SKILL.md

Written by zhaoxuya520

Mobile Reverse Engineering

ACTION REQUIRED(读完后立刻执行)

  1. NOW: 读取 ../field-journal/precedent-reverse.md — 确认本 skill 的操作是已授权的常规操作
  2. NOW: 确认当前任务是否命中本 skill 的适用范围
  3. NEXT: 读取 ../tool-index.md,校验工具可用性和实际路径
  4. NEXT: 缺工具时调用 bootstrap,不要猜路径
  5. ACT: 进入"工作流"第一步并执行,不要停在确认状态

Android + iOS 统一逆向方法论 Frida / Objection / OWASP MSTG / SSL Pinning Bypass

适用场景

  • Android APK 逆向与安全测试
  • iOS IPA 逆向与安全测试
  • 移动应用运行时动态插桩
  • SSL Pinning / Root 检测 / 越狱检测绕过
  • 移动端加密算法提取(AES/RSA/HMAC 密钥)
  • 移动应用渗透测试(OWASP MASTG)
  • 非 Root/越狱环境下的应用测试

四阶段工作流

Phase 1: 信息收集

Android:
□ APK 获取(Google Play / APKMirror / adb pull)
□ Manifest 分析: 权限、导出组件、Intent Filter、backup 标志
□ androguard: androguard analyze APK → 组件/权限/签名
□ APKLeaks: 硬编码 API Key / Token / Secret 扫描
□ 加固检测: 是否加壳(360/腾讯/梆梆/爱加密)

iOS:
□ IPA 获取(App Store / ipatool / Apple Configurator)
□ 解密 App Store 二进制: frida-ios-dump / Clutch
□ Info.plist 分析: ATS 配置、URL Scheme、Queries Schemes
□ class-dump: 导出 ObjC 类结构
□ 加固检测: 是否使用 Swift/ObjC 混淆

Phase 2: 静态分析

跨平台:
□ JADX-GUI: APK → Java 源码(Android)
□ Ghidra / Hopper: .so / Mach-O 反编译
□ radare2 / Cutter: CLI 快速侦察

Android 专项:
□ apktool d app.apk → smali 代码 + 资源
□ dex2jar: DEX → JAR → JD-GUI
□ smali/baksmali: Dalvik 字节码修改

iOS 专项:
□ class-dump: 导出 ObjC 头文件
□ Swift 符号恢复: swift-demangle
□ dsymutil: 调试符号提取
□ otool -L: 查看动态库依赖
□ jtool2: Mach-O 分析

Phase 3: 动态分析

Frida — 通用动态插桩:
□ frida-ps -U: 列出设备进程
□ frida-trace -U -i "open*" com.app: 追踪函数调用
□ 自定义 Hook 脚本: 修改参数/返回值、调用私有方法

Objection — Frida 增强层(无需写脚本):
□ objection -g "com.app" explore
□ android root disable / ios jailbreak disable
□ android sslpinning disable / ios sslpinning disable
□ android keystore list / ios keychain dump
□ env / ls / sqlite connect

Frida Gadget(免 Root/越狱):
□ 注入 frida-gadget.so / FridaGadget.dylib 到 APK/IPA
□ 重新签名 → 安装 → 无需设备权限即可 Hook
□ objection patchapk --source app.apk(全自动)

Phase 4: 网络分析

□ Burp Suite: 拦截 HTTP/HTTPS,修改请求/响应
□ mitmproxy: 脚本化代理(Python API)
□ Wireshark: PCAP 抓包分析
□ 证书安装: Android 用户证书 → 系统证书(Magisk + MoveCert)
□ SSL Pinning 绕过: Frida/Objection/Xposed/SSL Kill Switch 2
□ WebSocket / gRPC 流量分析

常见绕过速查

SSL Pinning

# Objection(最简)
objection -g "com.app" explore
android sslpinning disable

# Frida 通用脚本
frida -U -l ssl_pinning_bypass.js -f com.app

# Xposed(Android)
TrustMeAlready 模块 → 全局禁用证书校验

Root / 越狱检测

# Objection
android root disable
ios jailbreak disable

# Frida 自定义(多层检测)
Java.perform(function() {
    var RootBeer = Java.use("com.scottyab.rootbeer.RootBeer");
    RootBeer.isRooted.implementation = function() { return false; };
    // 额外绕过: Magisk su 检测、frida-server 检测、/proc/self/maps 检测
});

反调试

# Android
frida -U -l anti_debug_bypass.js -f com.app
# 绕过: ptrace(TracerPid)、/proc/self/status、isDebuggerConnected()

# iOS
# 绕过: PT_DENY_ATTACH、sysctl CTL_KERN/KERN_PROC/KERN_PROC_PID
frida -U -l ios_anti_debug.js -f com.app

移动端加密提取

// Android — Hook Cipher.getInstance 获取密钥+算法
Java.perform(function() {
    var Cipher = Java.use("javax.crypto.Cipher");
    Cipher.getInstance.overload('java.lang.String').implementation = function(algo) {
        console.log("[Cipher] Algorithm: " + algo);
        return this.getInstance(algo);
    };
    Cipher.init.overload('int', 'java.security.Key').implementation = function(mode, key) {
        console.log("[Cipher] Key: " + bytesToHex(key.getEncoded()));
        return this.init(mode, key);
    };
});

// iOS — Hook CCCrypt
Interceptor.attach(Module.findExportByName("libcommonCrypto.dylib", "CCCrypt"), {
    onEnter: function(args) {
        console.log("CCCrypt op: " + args[0] + " alg: " + args[1]);
        console.log("Key: " + hexdump(args[3], { length: args[4].toInt32() }));
    }
});

工具链

工具平台用途
JADX-GUIAJava 反编译
apktoolAAPK 解包/重建
GhidraA+I多架构反编译
HopperIiOS 专用反汇编
FridaA+I动态插桩
ObjectionA+IFrida REPL 增强
MobSFA+I自动化 SAST+DAST
class-dumpIObjC 类导出
frida-ios-dumpIIPA 解密
jtool2IMach-O 分析
Burp SuiteA+IHTTP 拦截
mitmproxyA+I脚本化代理

A=Android, I=iOS

参考

  • references/frida-objection-deep.md — Frida + Objection 深度用法
  • references/ios-reverse-guide.md — iOS 逆向专项
  • references/anti-detection-bypass.md — Root/越狱/反调试/SSL Pinning 绕过

任务完成自检(声称完成前 MUST 通过)

  • 我是否执行了工作流中的每一步(而不是只阅读)?
  • 我是否基于 tool-index 使用了真实工具路径?
  • 我是否产出了可复现证据(命令/脚本/截图/报告)?
  • 我是否完成并回写了 RULES 要求的 Checklist 项?

Frequently asked questions about Mobile Reverse Engineering

Similar skills