Use on il2cpp Unity binary?

unitygamedev · May 6, 2020, 7:34pm

Can vmprotect protect game that uses il2cpp? il2cpp will generate “global-metdata.dat” that matches function names, types, strings to IDs in compiled binary:

github.com/Perfare/Il2CppDumper

Il2CppDumper/Il2Cpp/MetadataClass.cs

master

using System;

namespace Il2CppDumper
{
    public class Il2CppGlobalMetadataHeader
    {
        public uint sanity;
        public int version;
        public uint stringLiteralOffset; // string data for managed code
        public int stringLiteralSize;
        public uint stringLiteralDataOffset;
        public int stringLiteralDataSize;
        public uint stringOffset; // string data for metadata
        public int stringSize;
        public uint eventsOffset; // Il2CppEventDefinition
        public int eventsSize;
        public uint propertiesOffset; // Il2CppPropertyDefinition
        public int propertiesSize;
        public uint methodsOffset; // Il2CppMethodDefinition
        public int methodsSize;

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Metadata may have offset to specific function in il2cpp built binary, I am not sure.

Can vmprotect do “simple” packing mode here where after execution all the offsets and things will be the same so that il2cpp loader still works?

More info on il2cpp loading flow here 还原使用IL2CPP编译的unity游戏的symbol（一） | Nevermoe's Blog

This would be very good functionality for vmprotect, many games use il2cpp for speed.

Admin · May 9, 2020, 9:29am

Unfortunately we are not going to support third-parties software.