ASM BlackMagic, Object->Interact(); Calling Errors.

[fusspawn]

Hi There, Im trying to use modified code from (i think Shynd's blog) to call Object->Interact(); via Asm.

my Method:

public void Interact()
        {
            
                
            uint ObjectVTable = MemoryUtils.ReadPointer(BaseAddress);
            uint InteractMethod = MemoryUtils.ReadPointer(ObjectVTable + (42 * 4)); // Object->Interact(); is the 42nd Method in the VTable
            uint CodeCave = MemoryUtils.Reader.AllocateMemory();
            Console.WriteLine("VTable: {0}, InteractMethod: {1}, CodeCave: {2}", ObjectVTable, InteractMethod, CodeCave);
            Lua.Lua.instance.Clear();
                  
            Lua.Lua.instance.AddLine("MOV EDX,DWORD PTR DS:["+WowObjects.ObjectManagerBase+"]");
            Lua.Lua.instance.AddLine("MOV EAX,DWORD PTR FS:[2C]");
            Lua.Lua.instance.AddLine("MOV EAX,DWORD PTR DS:[EAX]");
            Lua.Lua.instance.AddLine("ADD EAX,08");
            Lua.Lua.instance.AddLine("MOV DWORD PTR DS:[EAX],EDX");
            Lua.Lua.instance.AddLine("MOV ECX,DWORD PTR DS:["+BaseAddress+"]");
            Lua.Lua.instance.AddLine("CALL "+InteractMethod);
            Lua.Lua.instance.AddLine("RETN");
            
            try
            {
                  Lua.Lua.instance.Execute();
            }
            catch (Exception E)
            {
                Console.WriteLine("[WowObjects] Error in Object.Interact()");
            }
            finally
            {
                if (CodeCave != 0)
                    MemoryUtils.Reader.FreeMemory(CodeCave);
            }
} 

calling this method on valid object output what seem totally valid locations. yet this actually seems to do nothing. im at a loss. any ideas?

[Robske]

IIRC you have to move the address of the object into the ECX register, not it's VMT as you are doing ([BaseAddress] = VMT)

[Cypher]

IIRC you have to move the address of the object into the ECX register, not it's VMT as you are doing ([BaseAddress] = VMT)

Correct. 'this' is a pointer to the object, not to its VMT.

[fusspawn]

Thanks, Now going to test this.