Help! Decrypt files containing text strings (Unity)

T

Torqueman

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Hello. I'm posting this since I'm in a similar situation as the OP in this thread and he seemingly was able to find a solution.

I want to decrypt the files containing the text strings from Artery Gear: Fusion.
All the text from the game is stored in 1.860 files inside the com.bilibilien.arterygear\files\ag_game\Data folder:

files.PNG


And I have gone through all the steps the OP did prior to finding his post. I've decompiled libil2cpp, generated dummy DLL's and succesfully generated a dump.cs so now I'm at the same spot this user was, and since everything that was suggested to him seemingly didn't work but he said he solved it using another way, any pointers will be welcome.
 

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Exactly. I wish it was that easy to figure out.
The rest of the game's assets including models, sprites, fonts and sounds are stored in a different folder and can be ripped using the usual asset tools but these files aren't the same.
 
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1. Dump game .cs and generate ida/ghidra python scripts
2. Load libil2cpp.so and python scripts to ida/ghidra
3. Hook game using frida-il2cpp-bridge, for finding runtime keys etc.
4. Find decryption algorithm in decomiled code with ida/ghidra and write your decryptor

Ps. Chinese guide for ideas, it's not easy, but really.

使用Frida Il2Cpp Bridge 方便地进行Il2Cpp实例Hook - 吾爱破解 - 52pojie.cn

[md]# 前言近日在逆向某安卓手游的数据时，发现其AssetBundle、网络请求均使用AES加密。使用Frida Il2Cpp Bridge工具可在仅使用已知名称的情况下，方便地实现对某个可 ...
www.52pojie.cn
 
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