c# - 在 C# 中使用 CreateRemoteThread 传递多个参数

Question

我的目标是在 C# (CreateRemoteThread) 中使用 P/Invoke 调用远程进程中的函数。问题是该函数需要多个参数。有没有办法将多个参数传递给函数？

Answer 1

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);

[DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress,
uint dwSize, AllocationType flAllocationType, MemoryProtection flProtect);

[DllImport("kernel32.dll", SetLastError = true)]
static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, IntPtr lpBuffer, uint nSize, out UIntPtr lpNumberOfBytesWritten);

[Flags]
public enum AllocationType
{
    Commit = 0x1000,
    Reserve = 0x2000,
    Decommit = 0x4000,
    Release = 0x8000,
    Reset = 0x80000,
    Physical = 0x400000,
    TopDown = 0x100000,
    WriteWatch = 0x200000,
    LargePages = 0x20000000
}

[Flags]
public enum MemoryProtection
{
    Execute = 0x10,
    ExecuteRead = 0x20,
    ExecuteReadWrite = 0x40,
    ExecuteWriteCopy = 0x80,
    NoAccess = 0x01,
    ReadOnly = 0x02,
    ReadWrite = 0x04,
    WriteCopy = 0x08,
    GuardModifierflag = 0x100,
    NoCacheModifierflag = 0x200,
    WriteCombineModifierflag = 0x400
}

[StructLayout(LayoutKind.Sequential, Pack=1]
public struct RemoteThreadParams
{
    [MarshalAs(UnmanagedType.U1)]
    public byte Param1;

    [MarshalAs(UnmanagedType.I4)]
    public int Param2;

    ...
}

[DllImport("kernel32")]
public static extern IntPtr CreateRemoteThread(        
  IntPtr hProcess,
  IntPtr lpThreadAttributes,
  uint dwStackSize,
  IntPtr lpStartAddress,
  IntPtr lpParameter,
  uint dwCreationFlags,
  out uint lpThreadId
);

RemoteThreadParams params = new RemoteThreadParams();
parms.Param1 = 10;
parms.Param2 = 200;

// Allocate some native heap memory in your process big enough to store the
// parameter data
IntPtr iptrtoparams = Marshal.AllocHGlobal(Marshal.SizeOf(RemoteThreadParams));

// Copies the data in your structure into the native heap memory just allocated
Marshal.StructureToPtr(params, iptrtoparams, false);

// Use to get a handle to the process you intend to create a thread in.
OpenProcess(...,...,...);

// Use to alloc "committed" memory that is addressable by other process
IntPtr iptrremoteallocatedmemory = VirtualAllocEx()...

// Copy from your process memory to the memory the remoteprocess will be accessing
WriteProcessMemory(...,iptrremoteallocatedmemory,iptrtoparams,...,...);

Marshal.FreeHGlobal(iptrtoparams); // safe to free, as you have done the copy

CreateRemoteThread(...,...,...,...,iptrremoteallocatedmemory,...,...);

// Free the memory that was allocated for the other process...but be
// careful of its lifetime.
//
// Only free when the thread will no longer be accessing the allocated native
// memory i.e. when it's finished.

VirtualFreeEx(...,...,...,...);

在你的 C/C++ 代码中有:

#pragma pack(push,1)
struct tagRemoteThreadParams
{
    BYTE Param1;
    int Param2;
} RemoteThreadParams, *PRemoteThreadParams;
#pragma pack(pop)

将线程函数接收到的LPVOID转换为PRemoteThreadParams(即*RemoteThreadParams)。

如果您有一些想要作为参数之一的“字符串”，那么您将不得不做更多的工作来整理它们。如需更多帮助，请参阅:

• http://www.developerfusion.com/article/84519/mastering-structs-in-c/

其他一些引用:

• Dll injection. Execute CreateRemoteThread with parameter
• http://social.msdn.microsoft.com/Forums/vstudio/en-US/e044a6ff-c463-4b9b-8c82-f791c35dbaa1/virtualallocexwriteprocessmemory-and-writing-c-char-arrays?forum=csharpgeneral