C++ DLL远程注入与卸载函数源码
第一个函数是成功的，第二个函数运行发现会将目标程序挂死，也许是目标程序有保护机制
支持Unicode编码。
//-----------------------------------------------------------------------------------------------------------
// 函数: InjectDll
// 功能: 向目标进程中注入一个指定 Dll 模块文件.
// 参数: const TCHAR* ptszDllFile - Dll 文件名及路径
// DWORD dwProcessId - 目标进程 ID
// 返回: bool - 注入成功返回 true, 注入失败则返回 false.
// 说明: 采用远程线程注入技术实现
//-----------------------------------------------------------------------------------------------------------
bool InjectDll(const TCHAR* ptszDllFile, DWORD dwProcessId)
{
// 参数无效
if (NULL == ptszDllFile || 0 == ::_tcslen(ptszDllFile))
{
return false;
}
// 指定 Dll 文件不存在
if (-1 == _taccess(ptszDllFile, 0))
{
return false;
}
HANDLE hProcess = NULL;
HANDLE hThread = NULL;
DWORD dwSize = 0;
TCHAR* ptszRemoteBuf = NULL;
LPTHREAD_START_ROUTINE lpThreadFun = NULL;
// 获取目标进程句柄
hProcess = ::OpenProcess(PROCESS_CREATE_THREAD | PROCESS_VM_OPERATION | PROCESS_VM_WRITE, FALSE, dwProcessId);
if (NULL == hProcess)
{
return false;
}
// 在目标进程中分配内存空间
dwSize = (DWORD)::_tcslen(ptszDllFile) + 1;
ptszRemoteBuf = (TCHAR*)::VirtualAllocEx(hProcess, NULL, dwSize * sizeof(TCHAR), MEM_COMMIT, PAGE_READWRITE);
if (NULL == ptszRemoteBuf)
{
::CloseHandle(hProcess);
return false;
}
// 在目标进程的内存空间中写入所需参数(模块名)
if (FALSE == ::WriteProcessMemory(hProcess, ptszRemoteBuf, (LPVOID)ptszDllFile, dwSize * sizeof(TCHAR), NULL))
{
::VirtualFreeEx(hProcess, ptszRemoteBuf, dwSize, MEM_DECOMMIT);
::CloseHandle(hProcess);
return false;
}
// 从 Kernel32.dll 中获取 LoadLibrary 函数地址
#ifdef _UNICODE
lpThreadFun = (PTHREAD_START_ROUTINE)::GetProcAddress(::GetModuleHandle(_T("Kernel32")), "LoadLibraryW");
#else
lpThreadFun = (PTHREAD_START_ROUTINE)::GetProcAddress(::GetModuleHandle(_T("Kernel32")), "LoadLibraryA");
#endif
if (NULL == lpThreadFun)
{
::VirtualFreeEx(hProcess, ptszRemoteBuf, dwSize, MEM_DECOMMIT);
::CloseHandle(hProcess);
return false;
}
// 创建远程线程调用 LoadLibrary
hThread = ::CreateRemoteThread(hProcess, NULL, 0, lpThreadFun, ptszRemoteBuf, 0, NULL);
if (NULL == hThread)
{
::VirtualFreeEx(hProcess, ptszRemoteBuf, dwSize, MEM_DECOMMIT);
::CloseHandle(hProcess);
return false;
}
// 等待远程线程结束
::WaitForSingleObject(hThread, INFINITE);
// 清理
::VirtualFreeEx(hProcess, ptszRemoteBuf, dwSize, MEM_DECOMMIT);
::CloseHandle(hThread);
::CloseHandle(hProcess);
return true;
}
//-----------------------------------------------------------------------------------------------------------
// 函数: UnInjectDll
// 功能: 从目标进程中卸载一个指定 Dll 模块文件.
// 参数: const TCHAR* ptszDllFile - Dll 文件名及路径
// DWORD dwProcessId - 目标进程 ID
// 返回: bool - 卸载成功返回 true, 卸载失败则返回 false.
// 说明: 采用远程线程注入技术实现
//-----------------------------------------------------------------------------------------------------------
bool UnInjectDll(const TCHAR* ptszDllFile, DWORD dwProcessId)
{
// 参数无效
if (NULL == ptszDllFile || 0 == ::_tcslen(ptszDllFile))
{
return false;
}
HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
HANDLE hProcess = NULL;
HANDLE hThread = NULL;
// 获取模块快照
hModuleSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, dwProcessId);
if (INVALID_HANDLE_VALUE == hModuleSnap)
{
return false;
}
MODULEENTRY32 me32;
memset(&me32, 0, sizeof(MODULEENTRY32));
me32.dwSize = sizeof(MODULEENTRY32);
// 开始遍历
if(FALSE == ::Module32First(hModuleSnap, &me32))
{
::CloseHandle(hModuleSnap);
return false;
}
// 遍历查找指定模块
bool isFound = false;
do
{
isFound = (0 == ::_tcsicmp(me32.szModule, ptszDllFile) || 0 == ::_tcsicmp(me32.szExePath, ptszDllFile));
if (isFound) // 找到指定模块
{
break;
}
} while (TRUE == ::Module32Next(hModuleSnap, &me32));
::CloseHandle(hModuleSnap);
if (false == isFound)
{
return false;
}
// 获取目标进程句柄
hProcess = ::OpenProcess(PROCESS_CREATE_THREAD | PROCESS_VM_OPERATION, FALSE, dwProcessId);
if (NULL == hProcess)
{
return false;
}
// 从 Kernel32.dll 中获取 FreeLibrary 函数地址
LPTHREAD_START_ROUTINE lpThreadFun = (PTHREAD_START_ROUTINE)::GetProcAddress(::GetModuleHandle(_T("Kernel32")), "FreeLibrary");
if (NULL == lpThreadFun)
{
::CloseHandle(hProcess);
return false;
}
// 创建远程线程调用 FreeLibrary
hThread = ::CreateRemoteThread(hProcess, NULL, 0, lpThreadFun, me32.modBaseAddr /* 模块地址 */, 0, NULL);
if (NULL == hThread)
{
::CloseHandle(hProcess);
return false;
}
// 等待远程线程结束
::WaitForSingleObject(hThread, INFINITE);
// 清理
::CloseHandle(hThread);
::CloseHandle(hProcess);
return true;
}
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