public static bool RemapMemoryRegion(IntPtr processHandle, IntPtr baseAddress, int regionSize, Winnt.MemoryProtectionConstraints mapProtection)
{
IntPtr addr = Memoryapi.VirtualAlloc(IntPtr.Zero, regionSize, Winnt.MemoryAllocationType.MEM_COMMIT | Winnt.MemoryAllocationType.MEM_RESERVE, mapProtection);
if (addr == IntPtr.Zero)
{
return(false);
}
IntPtr copyBuf = Memoryapi.VirtualAlloc(IntPtr.Zero, regionSize, Winnt.MemoryAllocationType.MEM_COMMIT | Winnt.MemoryAllocationType.MEM_RESERVE, mapProtection);
if (!Memoryapi.ReadProcessMemory(processHandle, baseAddress, copyBuf, regionSize, out IntPtr bytes))
{
return(false);
}
IntPtr sectionHandle = default;
long sectionMaxSize = regionSize;
Ntifs.Ntstatus status = Ntifs.NtCreateSection(ref sectionHandle, Winnt.AccessMask.SECTION_ALL_ACCESS, IntPtr.Zero, ref sectionMaxSize, Winnt.MemoryProtectionConstraints.PAGE_EXECUTE_READWRITE, Winnt.SectionProtectionConstraints.SEC_COMMIT, IntPtr.Zero);
if (status != Ntifs.Ntstatus.STATUS_SUCCESS)
{
return(false);
}
status = Ntapi.NtUnmapViewOfSection(processHandle, baseAddress);
if (status != Ntifs.Ntstatus.STATUS_SUCCESS)
{
return(false);
}
IntPtr viewBase = baseAddress;
long sectionOffset = default;
uint viewSize = 0;
status = Ntapi.NtMapViewOfSection
(
sectionHandle,
processHandle,
ref viewBase,
UIntPtr.Zero,
regionSize,
ref sectionOffset,
ref viewSize,
2,
0,
Winnt.MemoryProtectionConstraints.PAGE_EXECUTE_READWRITE
);
if (status != Ntifs.Ntstatus.STATUS_SUCCESS)
{
return(false);
}
if (!Memoryapi.WriteProcessMemory(processHandle, viewBase, copyBuf, (int)viewSize, out bytes))
{
return(false);
}
if (!Memoryapi.VirtualFree(copyBuf, 0, Winnt.MemFree.MEM_RELEASE))
{
return(false);
}
return(true);
}
public static Task DetourWs2Send()
{
//ToDo: Add handling
W32Send.p3cx = Process.GetProcessesByName("3CXWin8Phone").FirstOrDefault();
W32Send.ws2ModIndex = GetModuleIndex(W32Send.p3cx.Modules, "WS2_32");
if (W32Send.ws2ModIndex == -1)
{
Debug.WriteLine("Module not found");
return(null);
}
IntPtr hWinsock = Libloaderapi.LoadLibraryA("WS2_32");
if (hWinsock == IntPtr.Zero)
{
return(null);
}
IntPtr sendFunc = Libloaderapi.GetProcAddress(hWinsock, "send");
if (sendFunc == IntPtr.Zero)
{
return(null);
}
W32Send.sendOffset = (int)sendFunc - (int)hWinsock;
Libloaderapi.FreeLibrary(hWinsock);
//The address of the detour
int detourAddr = (int)Memoryapi.VirtualAllocEx(W32Send.p3cx.Handle, IntPtr.Zero, (uint)W32Send.Detour.assembly.Length, Winnt.AllocationType.MEM_COMMIT, Winnt.MemoryProtection.PAGE_EXECUTE_READWRITE);
byte[] detourAddrArr = BitConverter.GetBytes(detourAddr);
//The address of the memory storage
int storageAddr = (int)Memoryapi.VirtualAllocEx(W32Send.p3cx.Handle, IntPtr.Zero, (uint)W32Send.PageSize, Winnt.AllocationType.MEM_COMMIT, Winnt.MemoryProtection.PAGE_EXECUTE_READWRITE);
byte[] storageAddrArr = BitConverter.GetBytes(storageAddr);
//Patching the detour-calling function with the detour address
for (int i = W32Send.CallDetour.StartOfMovInstruction; i < W32Send.CallDetour.EndOfMovInstruction; i++)
{
W32Send.CallDetour.assembly[i] = detourAddrArr[i - 1];
}
//Patching the detour function with the storage address
for (int i = W32Send.Detour.StartOfMovEaxInstruction; i <= W32Send.Detour.EndOfMovEaxInstruction; i++)
{
W32Send.Detour.assembly[i] = storageAddrArr[i - 1];
}
//Patching the detour function with the return address
byte[] returnAddr = BitConverter.GetBytes((int)W32Send.p3cx.Modules[W32Send.ws2ModIndex].BaseAddress + W32Send.sendOffset + 0xA);
for (int i = W32Send.Detour.StartOfMovEdxInstruction, x = 0; i < W32Send.Detour.EndOfMovEdxInstruction; i++, x++)
{
W32Send.Detour.assembly[i] = returnAddr[x];
}
//Detouring the send function to the detour calling function
IntPtr jmpToDetourAddr = W32Send.p3cx.Modules[W32Send.ws2ModIndex].BaseAddress + W32Send.sendOffset + W32Send.JmpToCallDetour.Offset;
if (!Memoryapi.WriteProcessMemory(W32Send.p3cx.Handle, jmpToDetourAddr, W32Send.JmpToCallDetour.assembly, W32Send.JmpToCallDetour.assembly.Length, out IntPtr _))
{
Debug.WriteLine(Marshal.GetLastWin32Error());
return(null);
}
;
//Writing the detour call
if (!Memoryapi.WriteProcessMemory(W32Send.p3cx.Handle, (jmpToDetourAddr - 19), W32Send.CallDetour.assembly, W32Send.CallDetour.assembly.Length, out IntPtr _))
{
Debug.WriteLine(Marshal.GetLastWin32Error());
return(null);
}
;
//Writing the detour
if (!Memoryapi.WriteProcessMemory(W32Send.p3cx.Handle, (IntPtr)detourAddr, W32Send.Detour.assembly, W32Send.Detour.assembly.Length, out IntPtr _))
{
Debug.WriteLine(Marshal.GetLastWin32Error());
return(null);
}
Task DetourTask = new Task(() =>
{
while (W32Send.detour)
{
byte[] data = new byte[W32Send.PageSize];
if (!Memoryapi.ReadProcessMemory(W32Send.p3cx.Handle, (IntPtr)storageAddr, data, W32Send.PageSize, out _))
{
Debug.WriteLine(Marshal.GetLastWin32Error());
}
//IF the byte is signalled
if (data[0] == 1)
{
//Memoryapi.ReadProcessMemory(p.Handle)
SocketData sd = new SocketData()
{
length = BitConverter.ToInt32(data.Skip(1).Take(4).ToArray(), 0),
bufferPtr = new byte[4],
};
sd.bufferCont = new byte[sd.length];
Array.Copy(data, 5, sd.bufferPtr, 0, sizeof(int));
int bufferPtrAddr = BitConverter.ToInt32(sd.bufferPtr, 0);
if (!Memoryapi.ReadProcessMemory(W32Send.p3cx.Handle, (IntPtr)bufferPtrAddr, sd.bufferCont, sd.length, out IntPtr _))
{
Debug.Write(Marshal.GetLastWin32Error());
}
#if DEBUG
Trace.Write($"Socket Length {sd.length}\n");
Trace.Write($"Socket Payload {Encoding.ASCII.GetString(sd.bufferCont, 0, sd.length)}\n"); //Debug uses ascii so messages will be omitted
Trace.Write("\n");
#endif
//ToDo: USE THE CORRECT CODE HERE, UPDATE IT.
Application.Current.Dispatcher.Invoke(() =>
{
packetTable.Rows.Add("ws32_32.send", BitConverter.ToString(sd.bufferCont), sd.length, "NYI");
});
Memoryapi.WriteProcessMemory(W32Send.p3cx.Handle, (IntPtr)storageAddr, new byte[] { 0x0 }, 0x1, out IntPtr _);
}
//Performance
Thread.Sleep(10);
}
//Remove the detour
IntPtr origInstrAddr = W32Send.p3cx.Modules[W32Send.ws2ModIndex].BaseAddress + W32Send.sendOffset + W32Send.JmpToCallDetour.Offset;
//Remove the detour jmp
if (!Memoryapi.WriteProcessMemory(W32Send.p3cx.Handle, origInstrAddr, W32Send.JmpToCallDetour.originalInstructions, W32Send.JmpToCallDetour.originalInstructions.Length, out IntPtr _))
{
;//ToDo: Do something here
}
//Remove the jne instruction incase the comparison is mid-check.
if (!Memoryapi.WriteProcessMemory(W32Send.p3cx.Handle, (IntPtr)(detourAddr + W32Send.Detour.JNEOffset), new byte[] { 0x90, 0x90 }, 0x2, out IntPtr _))
{
;//ToDo: Do something here
}
//ToDo: free memory of allocated pages.
int me = 5;
});
return(DetourTask);
}
static void Main(string[] args)
{
//Set this bool to true if the region data is not obscured.
bool sectioned = true;
Process targetProc = Process.GetProcessesByName("notepad").FirstOrDefault();
//Open a handle to the target process
IntPtr hProcess = Processthreadsapi.OpenProcess(ProcessAccessFlags.PROCESS_ALL_ACCESS, false, targetProc.Id);
if (hProcess == IntPtr.Zero)
{
NativeError("OpenProcess");
}
IntPtr baseAddress;
int regionSize;
if (sectioned)
{
//Set the base module address and the size.
baseAddress = targetProc.MainModule.BaseAddress;
regionSize = targetProc.MainModule.ModuleMemorySize;
}
else
{
//Query the process and get the baseInfo structure.
/*Very specific practice for very specifc apps. .NET has built in methods for standard apps.
* See: Process Class Base Address + ModuleMemorySize*/
if (Memoryapi.VirtualQueryEx
(
hProcess,
targetProc.MainModule.BaseAddress,
out MEMORY_BASIC_INFORMATION basicInfo,
Marshal.SizeOf(typeof(MEMORY_BASIC_INFORMATION))) == 0
)
{
NativeError("VirtualQueryEx");
}
baseAddress = basicInfo.baseAddress;
regionSize = (int)basicInfo.regionSize;
}
Ntpsapi.NtSuspendProcess(hProcess);
//Allocate a buffer to read the region to.
IntPtr buffer = Memoryapi.VirtualAlloc(IntPtr.Zero, regionSize, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
if (buffer == IntPtr.Zero)
{
NativeError("VirtualAlloc");
}
//Read the data into the buffer.
if (!Memoryapi.ReadProcessMemory(hProcess, baseAddress, buffer, regionSize, out _))
{
NativeError("ReadProcessMemory");
}
IntPtr hSection = IntPtr.Zero;
long sectionMaxSize = (long)regionSize;
//Create a section object to share between local and remote process.
if (Ntifs.NtCreateSection
(
ref hSection,
SECTION_ALL_ACCESS,
IntPtr.Zero,
ref sectionMaxSize,
PAGE_EXECUTE_READWRITE,
SEC_COMMIT,
IntPtr.Zero
)
!= Ntifs.Ntstatus.STATUS_SUCCESS)
{
NativeError("NtCreateSection");
}
//Unmap the memory at the base of the remote process.
if (Ntapi.NtUnmapViewOfSection(hProcess, baseAddress) != Ntifs.Ntstatus.STATUS_SUCCESS)
{
NativeError("NtUnmapViewOfSection");
}
IntPtr viewBase = baseAddress;
long sectionOffset = default;
uint viewSize = default;
//Map a region back to the original region location with new rights.
if (Ntapi.NtMapViewOfSection
(
hSection,
hProcess,
ref viewBase,
UIntPtr.Zero,
regionSize,
ref sectionOffset,
ref viewSize,
2 /*ViewUnmap*/,
0,
PAGE_EXECUTE_READWRITE /*Set to the desired new access rights*/
) != Ntifs.Ntstatus.STATUS_SUCCESS)
{
NativeError("NtMapViewOfSection");
}
//Write the memory back to the updated region.
if (!Memoryapi.WriteProcessMemory(hProcess, viewBase, buffer, (int)viewSize, out IntPtr _))
{
NativeError("WriteProcessMemory");
}
//Empty the buffer
Memoryapi.VirtualFree(buffer, 0, MemFree.MEM_RELEASE);
//Close the section handle
Handleapi.CloseHandle(hSection);
//Resume the process
Ntpsapi.NtResumeProcess(hProcess);
}