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Driver Based Plugin

 
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letmeknowit
How do I cheat?
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Joined: 07 Jul 2018
Posts: 3

PostPosted: Sat Jul 07, 2018 12:22 pm    Post subject: Driver Based Plugin Reply with quote

Good Day!

i've been trying to implement my own Read and Write to bypass some anticheats and i almost succeed except i get BSOD when Searching/Scanning for value/s. I code a basic plugin to hook ReadProcessMemory and it works in memory viewer etc except when scanning value.

here's the exact code hope someone could help me.

Code:


typedef HANDLE(WINAPI* oOpenProcess)(DWORD fdwAccess, BOOL fInherit, DWORD IDProcess);
oOpenProcess pOpenProcess = NULL;
HANDLE MyOpenProcess(
   DWORD fdwAccess,
   BOOL fInherit,
   DWORD IDProcess
)
{
   Driver.Attach(IDProcess);

   return (HANDLE)(-1);
}

typedef BOOL(WINAPI* oReadProcessMemory)(HANDLE  hProcess, LPCVOID lpBaseAddress, LPVOID  lpBuffer, SIZE_T  nSize, SIZE_T  *lpNumberOfBytesRead);
oReadProcessMemory pReadProcessMemory = NULL;
BOOL WINAPI MyReadProcessMemory(
   _In_  HANDLE  hProcess,
   _In_  LPCVOID lpBaseAddress,
   _Out_ LPVOID  lpBuffer,
   _In_  SIZE_T  nSize,
   _Out_ SIZE_T  *lpNumberOfBytesRead
)
{
   BOOL bStatus = FALSE;

   if (NT_SUCCESS(Driver.DriverRead((ptr_t)lpBaseAddress, nSize, lpBuffer)))
   {
      *lpNumberOfBytesRead = nSize;
      bStatus = TRUE;
   }

   return bStatus;
}


BOOL __stdcall CEPlugin_InitializePlugin(PExportedFunctions ef, int pluginid)
{
   if (!Driver.Init())
   {
      Exported.ShowMessage("Failed to load Driver!");
      return false;
   }

   Exported = *ef;
   

   pOpenProcess = (oOpenProcess)DetourFunction(*(PBYTE*)Exported.OpenProcess, (PBYTE)MyOpenProcess);

   pReadProcessMemory = (oReadProcessMemory)DetourFunction(*(PBYTE*)Exported.ReadProcessMemory, (PBYTE)MyReadProcessMemory);

   return TRUE;
}





here is how i use the driver

Code:

typedef struct _COPY_MEMORY
{
   ULONGLONG localbuf;         // Buffer address
   ULONGLONG targetPtr;        // Target address
   ULONGLONG size;             // Buffer size
   ULONG     pid;              // Target process id
   BOOLEAN   write;            // TRUE if write operation, FALSE if read
} COPY_MEMORY, *PCOPY_MEMORY;


VOID Attach(ptr_t PID)
{
   TargetPID = PID;
}

NTSTATUS DriverRead(ptr_t base, size_t size, PVOID buffer)
{
   if (TargetPID == 0)
      return STATUS_ACCESS_DENIED;

   // Not loaded
   if (_hDriver == INVALID_HANDLE_VALUE)
      return STATUS_DEVICE_DOES_NOT_EXIST;

   DWORD bytes = 0;
   COPY_MEMORY copyMem = { 0 };

   copyMem.pid = TargetPID;
   copyMem.targetPtr = base;
   copyMem.localbuf = (ULONGLONG)buffer;
   copyMem.size = size;
   copyMem.write = FALSE;

   if (!DeviceIoControl(_hDriver, IOCTL_RPMWPM_MEMORY, &copyMem, sizeof(copyMem), nullptr, 0, &bytes, NULL))
      return LastNtStatus();

   return STATUS_SUCCESS;
}






this is my first time to create a plugin and driver.
the driver's code is just for reading and writing.

thanks in advance.
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Dark Byte
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Joined: 09 May 2003
Posts: 20678
Location: The netherlands

PostPosted: Tue Jul 10, 2018 5:17 am    Post subject: Reply with quote

the bsod happens in the driver. check the driver source
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letmeknowit
How do I cheat?
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Joined: 07 Jul 2018
Posts: 3

PostPosted: Thu Jul 12, 2018 10:47 am    Post subject: Reply with quote

This is what i did in driver.
this my first try writing a driver and most of the codes are c&p

Code:

typedef struct _COPY_MEMORY
{
   ULONGLONG localbuf;
   ULONGLONG targetPtr;
   ULONGLONG size;
   ULONG     pid;
   BOOLEAN   write;
} COPY_MEMORY, *PCOPY_MEMORY;

NTSTATUS DriverCopyMemory(IN PCOPY_MEMORY pCopy)
{
   NTSTATUS status = STATUS_SUCCESS;
   PEPROCESS pProcess = NULL, pSourceProc = NULL, pTargetProc = NULL;
   PVOID pSource = NULL, pTarget = NULL;

   status = PsLookupProcessByProcessId((HANDLE)pCopy->pid, &pProcess);

   if (NT_SUCCESS(status))
   {
      SIZE_T bytes = 0;

      // Write
      if (pCopy->write != FALSE)
      {
         pSourceProc = PsGetCurrentProcess();
         pTargetProc = pProcess;
         pSource = (PVOID)pCopy->localbuf;
         pTarget = (PVOID)pCopy->targetPtr;
      }
      // Read
      else
      {
         pSourceProc = pProcess;
         pTargetProc = PsGetCurrentProcess();
         pSource = (PVOID)pCopy->targetPtr;
         pTarget = (PVOID)pCopy->localbuf;
      }

      status = MmCopyVirtualMemory(pSourceProc, pSource, pTargetProc, pTarget, pCopy->size, KernelMode, &bytes);
   }

   if (pProcess)
      ObDereferenceObject(pProcess);

   return status;
}


NTSTATUS IoControl(PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
   ........
   ........
   ........
   ........
   ........

   if (ioControlCode == IOCTL_BLG_COPY_MEMORY)
   {
      if (inputBufferLength >= sizeof(COPY_MEMORY) && ioBuffer)
         Irp->IoStatus.Status = DriverCopyMemory((PCOPY_MEMORY)ioBuffer);
      else
         Irp->IoStatus.Status = STATUS_INFO_LENGTH_MISMATCH;
   }
   else
      Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;

   ........
   ........
   ........
   ........
}




thanks DarkByte
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Dark Byte
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Joined: 09 May 2003
Posts: 20678
Location: The netherlands

PostPosted: Thu Jul 12, 2018 10:56 am    Post subject: Reply with quote

you need to make sure that the output buffer and source are readable

also, when the bsod happens copy c:\windows\memory.dmp to a writable location and open it as a crash dump in windbg
if the sourcecode is correct it will show the sourcecode line where it failed

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letmeknowit
How do I cheat?
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Joined: 07 Jul 2018
Posts: 3

PostPosted: Fri Jul 13, 2018 8:56 am    Post subject: Reply with quote

thanks darkbyte maybe it crash because i return (HANDLE)(-1) in OpenProcess and VirtualQueryEx returns unwanted result because handle is not from target PID.

i will take a look thanks again Smile
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