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[C++/DLL]Crashing when injected

Cheat Engine Forum Index -> General programming

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shakib187
Expert Cheater

Reputation: 0

Joined: 24 May 2007
Posts: 215

Posted: Mon Apr 28, 2014 5:21 am Post subject: [C++/DLL]Crashing when injected

Code:

#include <windows.h>
#include <stdio.h>
#include <iostream>
#include <conio.h>
#include <string>
#include <fstream>
#include <float.h>
using namespace std;

void block()
{
mouse_event(MOUSEEVENTF_MIDDLEDOWN, 0, 0, 0, 0);
Sleep(1);
mouse_event(MOUSEEVENTF_MIDDLEUP, 0, 0, 0, 0);
}

DWORD WINAPI LoopFunction( LPVOID lpParam )
{
HANDLE phandle = GetCurrentProcess();
DWORD BaseAddr = (DWORD)GetModuleHandleA("entus.exe");
DWORD painted = 0x017234238;
DWORD pointer2 = BaseAddr+painted;
DWORD thesecond = (DWORD)(*(DWORD*)pointer2 + 0x17c);
DWORD thethird = (DWORD)(*(DWORD*)thesecond + 0x030);
DWORD thefourth = (DWORD)(*(DWORD*)thethird + 0x05D0);
DWORD theresult = (DWORD)(*(DWORD*)thefourth + 0x4E8);
DWORD pointed;
pointed = *(DWORD*)theresult;

while(1) {
if (GetAsyncKeyState(VK_HOME)&1)
if ((*(DWORD*)pointed) == 13)
{
(block());
}
}
Sleep(1);
return 0;
}

BOOL WINAPI DllMain (HINSTANCE hModule, DWORD dwAttached, LPVOID lpvReserved)
{
if (dwAttached == DLL_PROCESS_ATTACH) {
CreateThread(NULL,0,&LoopFunction,NULL,0,NULL);
}
return 1;
}

Anyone know what is wrong?

zm0d
Master Cheater

Reputation: 7

Joined: 06 Nov 2013
Posts: 423

Posted: Mon Apr 28, 2014 10:09 am Post subject:

Didn't got deep in your code but on my first opinion there's probably something wrong with your pointer calculation. Use SteveAndrews method to calculate multi-level pointers:

Code by SteveAndrew he gave me once:

Code:

void *GetPointerSafest(DWORD PointerBase, ...)
{
DWORD CurrentPointer = (PointerBase + (DWORD)GetModuleHandle(0));
DWORD LastOffset = 0, BytesRead;
va_list Params;
va_start(Params, PointerBase);
for(;;)
{
unsigned int CurrentOffset = va_arg(Params, unsigned int);
if(CurrentOffset != 0xffffffff)
{
CurrentPointer += LastOffset;
ReadProcessMemory((HANDLE)-1, (void*)CurrentPointer, (void*)&CurrentPointer, 4, &BytesRead);
if(BytesRead != 4 || CurrentPointer == 0) //failed reading or we ran into null pointer!
{
CurrentPointer = 0;
break;
}
LastOffset = CurrentOffset;
}
else
{
CurrentPointer += LastOffset;
break;
}
}
va_end(Params);

return (void*)CurrentPointer;
}

It's ease to use and works correct.

Edit:

Also I'd prefer to use GetModuleHandle(0) when using an injected DLL since this will always return your executables base address. =)

Regards,
zm0d

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