Once you have the decrypted global-metadata.dat file (usually named differently than the encrypted one), you can use it alongside the native binary to reconstruct the code structure. Using Il2CppDumper The most common tool for this is .
: Run the tool using Python targeting the game bundle identifier: python dump-metadata.py com.targetgame.package Use code with caution.
Native binaries discard high-level information like class names, method signatures, variables, and string literals. However, the Unity engine still needs this data to handle engine operations, dynamic reflections, and setup requirements.
If anti-cheat mechanisms prevent you from attaching dynamic debuggers like Frida, you must find the underlying decryption keys statically by analyzing the loading module. CameroonD/Il2CppMetadataExtractor: Simple and ... - GitHub decrypt globalmetadatadat
Disclaimer: This information is for educational purposes and authorized security research only. If you'd like, I can: Explain how to in a specific game. Show you how to use Ghidra to analyze the decrypted output. Provide a Frida script snippet for a specific game. Let me know how you'd like to proceed with the analysis . Finding loaders for obfuscated global-metadata.dat files
The techniques for decrypting global-metadata.dat are constantly evolving alongside new game engines and protections. For example, a game called "Azur Promilia" uses a technology called HybridCLR alongside the CodePhilosophy Obfuz, which required a novel approach for analysis. In this case, the decryption was not just about the main global-metadata.dat but also about dealing with HotPatch DLLs, requiring a deep dive into new structures and a customized decryption process. This shows that decryption is an ongoing arms race.
Reconstructing the project structure to extract 3D models, textures, or scenes. 3. Tools for Analyzing global-metadata.dat Once you have the decrypted global-metadata
Sometimes necessary to "dump" the file from memory while the game is running.
Use a Frida script designed to scan the memory space of the game process for the global-metadata.dat magic bytes. The standard magic bytes header for a valid Unity metadata file is 0xAF 0x1B 0xB1 0xFA .
In a standard Unity game, the logic is stored in a Assembly-CSharp.dll file. This is easy to decompile. However, to increase performance and security, many developers use . When a game is compiled with IL2CPP: The C# code is converted into C++ code. CameroonD/Il2CppMetadataExtractor: Simple and
By understanding the nature of GlobalMetadataDat and applying the techniques outlined in this article, you can unravel the mystery of this cryptic file and gain insights into its contents.
Il2CppDumper will generate a dump.cs file (containing all methods and structures) and a DummyDll folder, which can be opened in dnSpy for code analysis. 6. Challenges and Evolving Protections
Standard Header Magic: AF 1B B1 FA (Valid Unity Metadata) Encrypted Header Magic: XX XX XX XX (Custom Obfuscation/Encryption) 2. Common Metadata Protection Techniques