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Need Help: How To Edit Double Values With C++ With Pointers

 
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VORP
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PostPosted: Wed Aug 31, 2022 6:07 am    Post subject: Need Help: How To Edit Double Values With C++ With Pointers Reply with quote

Hi, I have found pointers for values I want to change and all those are double values. For some specific reasons changing these values with Cheatengine script is not an option, so I want to change them with C++ in Visual Studio. I have found a lot of guides how to change int values like this, but I have not found a single guide for changing double values. Could you please write C++ script which changes a double value by using pointers with offsets?

So far this is a code I came up with in visual studio, but it doesn't work for double values:

Code:

#include <iostream>
#include <Windows.h>
#include <TlHelp32.h>


DWORD GetPID(const char* ProcessName) {
   PROCESSENTRY32 processInfo;
   processInfo.dwSize = sizeof(processInfo);


   HANDLE processesSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);
   if (processesSnapshot == INVALID_HANDLE_VALUE)
      return 0;

   Process32First(processesSnapshot, &processInfo);
   if (!strcmp(processInfo.szExeFile, ProcessName))
   {
      CloseHandle(processesSnapshot);
   }

   while (Process32Next(processesSnapshot, &processInfo))
   {
      if (!strcmp(processInfo.szExeFile, ProcessName))
      {
         CloseHandle(processesSnapshot);
         return processInfo.th32ProcessID;
      }
   }
   CloseHandle(processesSnapshot);
   return processInfo.th32ProcessID;
}

DWORD GetModule(const char* moduleName, unsigned long ProcessID)
{
   DWORD modEntry = { 0 };

   HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE | TH32CS_SNAPMODULE32, ProcessID);

   if (hSnapshot != INVALID_HANDLE_VALUE)
   {
      DWORD curr = { 0 };

      curr.dwSize = sizeof(MODULEENTRY32);
      if (Module32First(hSnapshot, &curr))
      {
         do
         {
            if (!strcmp(curr.szModule, moduleName))
            {
               modEntry = curr;
               break;
            }
         } while (Module32Next(hSnapshot, &curr));
      }
      CloseHandle(hSnapshot);
   }
   return modEntry;
}

int main()
{


   DWORD pid = getPID("InstanceServerG.exe");
   DWORD base = getModule("InstanceServerG.exe", pid);
   unsigned long long pid = GetPID("InstanceServerG.exe");
   MODULEENTRY32 module = GetModule("InstanceServerG.exe", pid);
   HANDLE phandle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);

   unsigned double result;
   //These are modified values (new):
   double ChanneledBuildupAOE = 112.5; //channeled buildup AOE value
    double ChanneledBuildupRange = 2000; //channeled BuildupRange value
   int SiphonCountProduction = 2; //Siphon Production Counter


   //ChanneledBuildupAOE changer:
   ReadProcessMemory(phandle, (void*)((unsigned long long)module.modBaseAddr + 0x01041DD0), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0xA4), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x4DC), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x24), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x4), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x18), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x4), &result, sizeof(result), 0);
   WriteProcessMemory(phandle, (void*)((unsigned long long)result + 0xF0), &ChanneledBuildupAOE, sizeof(ChanneledBuildupAOE), 0);



   //ChanneledBuildupRange changer:
   ReadProcessMemory(phandle, (void*)((unsigned long long)module.modBaseAddr + 0x01041DD0), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0xA4), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0xB1C), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x24), &result, sizeof(result), 0);
   ReadProcessMemory(phandle, (void*)((unsigned long long)result + 0x4), &result, sizeof(result), 0);
   WriteProcessMemory(phandle, (void*)((unsigned long long)result + 0xC80), &ChanneledBuildupRange, sizeof(ChanneledBuildupRange), 0);
   std::cout << "Grey Goo has been Modded successfully";

   system("pause");
}
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Dark Byte
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PostPosted: Wed Aug 31, 2022 6:19 am    Post subject: Reply with quote

result must be the pointersize type the target uses, not double
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VORP
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PostPosted: Wed Aug 31, 2022 6:29 am    Post subject: Reply with quote

Dark Byte wrote:
result must be the pointersize type the target uses, not double


How do I declare that?

pointersize result; ?
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Dark Byte
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PostPosted: Wed Aug 31, 2022 8:38 am    Post subject: Reply with quote

is the target process 32 bit? Then use DWORD result
Is the target process 64 bit? Then use QWORD result

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VORP
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PostPosted: Wed Aug 31, 2022 10:39 am    Post subject: Reply with quote

Dark Byte wrote:
is the target process 32 bit? Then use DWORD result
Is the target process 64 bit? Then use QWORD result


Target process is 32bit.
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atom0s
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PostPosted: Wed Aug 31, 2022 2:02 pm    Post subject: Reply with quote

If your target is 32bit then your pointer type is most likely not 'unsigned long long' (which is 8 bytes).

Also, since you aren't doing any error checking, it is a high chance you are going to fail to even get a handle by using 'PROCESS_ALL_ACCESS' if you are not running as administrator. You should avoid just blindly requesting full access like that and instead specifically mark which things you want when opening a handle.

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VORP
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PostPosted: Thu Sep 01, 2022 7:58 am    Post subject: Reply with quote

Yes, it has worked! Thanks a lot!
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VORP
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PostPosted: Fri Sep 09, 2022 5:54 am    Post subject: Reply with quote

I have a new question: can I somehow print out changed value into console window? I tried to print out result, but it just always says 0.
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