Hack an Unity3D game

This article shares the tools and steps needed to hack an Unity3D game.

Tools:

• https://github.com/Perfare/Il2CppDumper
• https://github.com/dnSpyEx/dnSpy
• https://github.com/frida/frida
• IDA Pro
• Hex editor
• https://armconverter.com/

Steps:

• Extract libil2cpp.so and global-metadata.dat from the game apk file
• Use Il2CppDumper to get dumped dump.cs and dlls
• Use dnSpy to view the dumped code (Class structures and address), find the target method to hack
• Use frida to verify if the target method can be hacked
• Open libil2cpp.so with IDA Pro and goto the target method address, create function, find the instructions to be patched
• Use armconverter to convert instructions to hex code
• Use hex editor to apply the patch to libil2cpp.so
• Replace libil2cpp.so in the game apk file with patched one, sign the apk and install