internal Enumerations.MemoryProtectionType Invoke(SafeProcessHandle processHandle, IntPtr baseAddress, int protectionSize, Enumerations.MemoryProtectionType newProtectionType)
{
// Store the base address of the memory region to protect in a buffer
var baseAddressBuffer = MemoryTools.StoreStructureInBuffer(baseAddress);
// Store the protection size in a buffer
var protectionSizeBuffer = MemoryTools.StoreStructureInBuffer(protectionSize);
// Initialise a buffer to store the returned old protection of the memory region
var oldProtectionBuffer = MemoryTools.AllocateMemoryForBuffer(sizeof(ulong));
// Perform the syscall
var syscallResult = _ntProtectVirtualMemoryDelegate(processHandle, baseAddressBuffer, protectionSizeBuffer, newProtectionType, oldProtectionBuffer);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to protect memory in the target process", syscallResult);
}
// Marshal the returned old protection of the memory region from the buffer
var oldProtection = (Enumerations.MemoryProtectionType)Marshal.PtrToStructure <ulong>(oldProtectionBuffer);
MemoryTools.FreeMemoryForBuffer(baseAddressBuffer);
MemoryTools.FreeMemoryForBuffer(protectionSizeBuffer);
MemoryTools.FreeMemoryForBuffer(oldProtectionBuffer);
return(oldProtection);
}
internal TDelegate CreateDelegateForSyscall <TDelegate>() where TDelegate : class
{
// Get the address of the function
var functionAddress = _ntDllAddress + (int)_ntDllFunctions.Find(function => function.Name == typeof(TDelegate).Name.Replace("Definition", "")).Offset;
// Copy the first 8 bytes of the function
var functionBytes = new byte[8];
Marshal.Copy(functionAddress, functionBytes, 0, 8);
// Retrieve the syscall index from the bytes
var syscallIndexBytes = Environment.Is64BitProcess ? functionBytes.Skip(4).Take(4) : functionBytes.Skip(1).Take(4);
var syscallIndex = BitConverter.ToUInt32(syscallIndexBytes.ToArray(), 0);
// Create the shellcode used to perform the syscall
var shellcode = Environment.Is64BitProcess ? SyscallX64.GetShellcode(syscallIndex) : SyscallX86.GetShellcode(syscallIndex);
// Store the shellcode in a buffer
var shellcodeBuffer = MemoryTools.AllocateMemoryForBuffer(shellcode.Length);
_shellcodeAddresses.Add(shellcodeBuffer);
Marshal.Copy(shellcode, 0, shellcodeBuffer, shellcode.Length);
// Create a delegate to perform the syscall
return(Marshal.GetDelegateForFunctionPointer <TDelegate>(shellcodeBuffer));
}
internal SafeThreadHandle Invoke(SafeProcessHandle processHandle, IntPtr startAddress, IntPtr parameter)
{
// Initialise a buffer to store the returned thread handle
var threadHandleBuffer = MemoryTools.AllocateMemoryForBuffer(IntPtr.Size);
// Perform the syscall
const Enumerations.ThreadAccessMask desiredAccess = Enumerations.ThreadAccessMask.SpecificRightsAll | Enumerations.ThreadAccessMask.StandardRightsAll;
var syscallResult = _ntCreateThreadExDelegate(threadHandleBuffer, desiredAccess, IntPtr.Zero, processHandle, startAddress, parameter, Enumerations.ThreadCreationType.HideFromDebugger, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to create a thread in the target process", syscallResult);
}
// Marshal the returned thread handle from the buffer
var threadHandle = new SafeThreadHandle(Marshal.PtrToStructure <IntPtr>(threadHandleBuffer), true);
MemoryTools.FreeMemoryForBuffer(threadHandleBuffer);
return(threadHandle);
}
internal IntPtr Invoke(SafeProcessHandle processHandle, int allocationSize, Enumerations.MemoryProtectionType protectionType)
{
// Initialise a buffer to store the returned address of the allocated memory region
var memoryRegionAddressBuffer = MemoryTools.AllocateMemoryForBuffer(IntPtr.Size);
// Store the size of the allocation in a buffer
var allocationSizeBuffer = MemoryTools.StoreStructureInBuffer(allocationSize);
// Perform the syscall
const Enumerations.MemoryAllocationType allocationType = Enumerations.MemoryAllocationType.Commit | Enumerations.MemoryAllocationType.Reserve;
var syscallResult = _ntAllocateVirtualMemoryDelegate(processHandle, memoryRegionAddressBuffer, 0, allocationSizeBuffer, allocationType, protectionType);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to allocate memory in the target process", syscallResult);
}
// Marshal the returned address of the memory region from the buffer
var memoryRegionAddress = Marshal.PtrToStructure <IntPtr>(memoryRegionAddressBuffer);
MemoryTools.FreeMemoryForBuffer(memoryRegionAddressBuffer);
MemoryTools.FreeMemoryForBuffer(allocationSizeBuffer);
return(memoryRegionAddress);
}
internal IntPtr Invoke(SafeProcessHandle processHandle, IntPtr baseAddress, int bytesToRead)
{
// Initialise a buffer to store the returned bytes read
var bytesReadBuffer = MemoryTools.AllocateMemoryForBuffer(bytesToRead);
// Perform the syscall
var syscallResult = _ntReadVirtualMemoryDelegate(processHandle, baseAddress, bytesReadBuffer, (ulong)bytesToRead, IntPtr.Zero);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to read memory from the target process", syscallResult);
}
return(bytesReadBuffer);
}
internal IntPtr Invoke(SafeProcessHandle processHandle, IntPtr baseAddress)
{
// Initialise a buffer to store the returned memory basic information structure in
var memoryBasicInformationBuffer = MemoryTools.AllocateMemoryForBuffer(Marshal.SizeOf <Structures.MemoryBasicInformation>());
// Perform the syscall
var syscallResult = _ntQueryVirtualMemoryDelegate(processHandle, baseAddress, Enumerations.MemoryInformationClass.BasicInformation, memoryBasicInformationBuffer, (ulong)Marshal.SizeOf <Structures.MemoryBasicInformation>(), IntPtr.Zero);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to query memory in the target process", syscallResult);
}
return(memoryBasicInformationBuffer);
}
internal IntPtr Invoke(SafeProcessHandle processHandle, Enumerations.ProcessInformationClass processInformationClass)
{
// Initialise a buffer to store the returned process information structure
var bufferSize = processInformationClass == Enumerations.ProcessInformationClass.BasicInformation ? Marshal.SizeOf <Structures.ProcessBasicInformation>() : sizeof(ulong);
var processInformationBuffer = MemoryTools.AllocateMemoryForBuffer(bufferSize);
// Perform the syscall
var syscallResult = _ntQueryInformationProcessDelegate(processHandle, processInformationClass, processInformationBuffer, (ulong)bufferSize, IntPtr.Zero);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to query the information of the target process", syscallResult);
}
return(processInformationBuffer);
}
internal SafeProcessHandle Invoke(int processId)
{
// Initialise a buffer to store the returned process handle
var processHandleBuffer = MemoryTools.AllocateMemoryForBuffer(IntPtr.Size);
// Store an empty object attributes structure in a buffer
var objectAttributesBuffer = MemoryTools.StoreStructureInBuffer(new Structures.ObjectAttributes());
// Store a client id structure in a buffer
var clientId = new Structures.ClientId {
UniqueProcess = new IntPtr(processId), UniqueThread = IntPtr.Zero
};
var clientIdBuffer = MemoryTools.StoreStructureInBuffer(clientId);
// Perform the syscall
var syscallResult = _ntOpenProcessDelegate(processHandleBuffer, Enumerations.ProcessAccessMask.AllAccess, objectAttributesBuffer, clientIdBuffer);
if (syscallResult != Enumerations.NtStatus.Success)
{
ExceptionHandler.ThrowWin32Exception("Failed to open a handle to the target process", syscallResult);
}
// Marshal the returned process handle from the buffer
var processHandle = new SafeProcessHandle(Marshal.PtrToStructure <IntPtr>(processHandleBuffer), true);
MemoryTools.FreeMemoryForBuffer(processHandleBuffer);
MemoryTools.FreeMemoryForBuffer(objectAttributesBuffer);
MemoryTools.FreeMemoryForBuffer(clientIdBuffer);
return(processHandle);
}