To understand how to decrypt it, you first need to know what it does. Unity games traditionally used , which keeps the game's code in easily readable .dll files. To improve performance and security, Unity introduced IL2CPP (Intermediate Language to C++).
: Modify game behavior by hooking into specific functions. Common Decryption Methods
Because the game engine must read the unencrypted metadata into the device's RAM to run the game, the decryption key or the decrypted file itself always exists in memory at some point.
Decrypt GlobalMetaDataDat
Without this file, the native binary ( .dll or .so ) is just a collection of unorganized code, making reverse engineering extremely difficult. Why Encrypt or Obfuscate global-metadata.dat? decrypt globalmetadatadat
Use a debugger like (Windows) or Frida (Android/iOS).
Setup Frida on your PC and your rooted Android device/emulator.
Instead of figuring out a complex encryption algorithm, the easiest workaround is to let the game decrypt the file for you. Once the game boots up, the decrypted metadata resides safely in the device's RAM. You just have to pull it out. Step 1: Use Frida to Dump Memory
Decrypting GlobalMetaData.dat involves several steps: To understand how to decrypt it, you first
Find the cross-references (XREFS) to locate the loading function.
frida -U -f com.studio.gamename -l il2cpp_metadata_extractor.js --no-pause Use code with caution.
: Determine how the file was encrypted. This could involve checking for encryption algorithms (like AES, RSA, etc.), looking for specific encryption tools or software used, or understanding any protocols or standards followed.
Decrypting global-metadata.dat is the "Golden Key" to Unity modding. Once decrypted, you can use to generate a dummy.dll , which can then be opened in dnSpy to read the game's original C# logic. : Modify game behavior by hooking into specific functions
Searching for vulnerabilities, cheating mechanisms, or backdoors.
When developers compile a Unity project using the IL2CPP (Intermediate Language to C++) toolchain, all the original C# class structures, method names, and string literals are stripped from the main executable and stored in this specialized data file. Because tools like Perfare's Il2CppDumper rely entirely on this file to restore readable code structures, game developers frequently encrypt it to protect their intellectual property. 1. Understanding global-metadata.dat and Encryption
When a Unity game is built using IL2CPP, C# code isn't just compiled into a .dll file. Instead, Unity converts the intermediate language (IL) into C++ code, which is then compiled by a native compiler (like Clang or MSVC) into a native binary—specifically, GameAssembly.dll on Windows, libil2cpp.so on Android, or a Mach-O file on iOS.