reverse-engineering-ios-app-with-frida

Decrypt the App Store binary with frida-ios-dump on a jailbroken device, extract headers with class-dump, then use frida-trace and Interceptor.attach hooks to trace Objective-C methods and capture arguments and return values at runtime.

Hook the CCCrypt function from libcommonCrypto.dylib with Frida's Interceptor.attach and read the key, IV, and operation arguments during an encryption call. Also hook SecItemCopyMatching and NSUserDefaults objectForKey: to catch stored secrets.

Pure Swift classes without @objc annotation are not exposed through the Objective-C runtime, so ObjC.classes misses them. Use Module.enumerateExports() or frida-trace on mangled Swift symbol names to locate them instead.

Yes, by injecting Frida Gadget into a repackaged IPA and sideloading it onto the device. A jailbroken device with frida-server installed via Cydia or Sileo remains the simpler setup for most assessments.

The app likely implements anti-Frida checks that detect frida-server processes, agent strings in memory, or injected dyld libraries. Switch to Frida Gadget injection or stealth Frida builds to evade these detections.

Do not use it for unauthorized reverse engineering that violates terms of service or intellectual property law. It is intended for authorized penetration testing and security assessments only.