how to reverse engineer an Android Application and what tools you can use to achieve this - even without owning an Android Phone. - The EPIC.blog

• Android Tampering and Reverse Engineering
• How to reverse engineer Unity3D Games?
  • Reverse engineering a Unity-based Android game
  • Deep dive into UnityFS: structure and implementation - UnityFS was a new asset bundle format introduced in Unity 5.
    • UnityPack - A library to deserialize Unity3D Assets and AssetBundles files (*.unity3d).
    • Extract Images and Textures from Unity Games
    • UABE - Asset Bundle Extractor

Where is main() in Android?

Find a class which is a subclass of Activity and which is set as a LAUNCHER to start the execution of the application from its onCreate() method.

Activty are listed in the AndroidManifest.xml file.

Tools

• JADX (flatpak) - CLI

  GUI. It can run directly on APK / DEX combo without the extra step. It has also magical ability to deal with deobfuscation and from what I can tell the best full text search, declaration jumping and usage lookup.

• Apktool - apktool d -r -s [your game].apk

Unity

Latest version of C#code are transpilled to cpp.

• Il2CppDumper / linux
• dnSpy - a debugger and .NET assembly editor (windows)
• ILSpy - the open-source .NET assembly browser and decompiler.
  • ilspy-vscode

Android Crackmes

see also

• The Ultimate Game Hacking Resource
• r/REGames
• How To Reverse Engineer A Bluetooth Device / 2