C++读取内存崩溃

Question

I'm trying to read memory in a different process, but every time I run the script, it crashes. [Windows 7 32-bit]

Here's my code:

#include <windows.h>
#include <iostream>
using namespace std;

unsigned int canJump;


int main()
{
    //DWORD oldProtect;
    //VirtualProtect((LPVOID)0x04565020, sizeof(unsigned int), PAGE_READONLY, &oldProtect);

    while(1)
    {
        canJump = *(unsigned int*)0x04565020;

        if(!paused)
        {
            if(GetAsyncKeyState(VK_SPACE) && canJump == 0)
                cout << "here" << endl;
        }

        if(GetAsyncKeyState(VK_F9))
            break;
    }
    return 0;
}

I looked into VirtualProtect (as you can see), but it did nothing. :(

Answer 1

Your problem is you're using code intended for an internal hack, in an external hack.

int main() indicates this is an external hack and you're targetting an external project

canJump = *(unsigned int*)0x04565020; is code you would normally see in an internal hack. This line is de-referencing an address to get it's value and store it in canJump. Your program is external to the target process, therefore you cannot de-reference memory from an external process. Your current code is de-referencing local memory.

To solve your problem, you must either convert this to an internal DLL which you inject or re-write everything as an external hack. If you make it an external hack, you must use ToolHelp32Snapshot(), OpenProcess(), ReadProcessMemory() and WriteProcessMemory() to achieve your goal.