在Windows2000/XP下向进程插入自己的线程的演示

在Windows2000/XP下向进程插入自己的线程的演示 

编写 ImageWalk.Dll (作用是当被加载，它就通过VirtualQuery获取加载它的进程所加载的Dll信息)使用VC6生成一个 Win32 Dynamic-Link Library 工程编写DllMain函数内容如下：

BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
{
MEMORY_BASIC_INFORMATION mbi;
PBYTE ptr = NULL;
DWORD dwBytesReturn = sizeof(MEMORY_BASIC_INFORMATION);

char szBuffer[256*100] = "";
char szModuFile[240] = "";
char szThis[256] = "";
char szProcess[256] = "";
char szTmpBuffer[256] = "";

GetModuleFileName((HINSTANCE)hModule, szThis, 256);
GetModuleFileName(GetModuleHandle(NULL), szProcess,256);

while( dwBytesReturn == sizeof(MEMORY_BASIC_INFORMATION) )
{
dwBytesReturn = VirtualQuery( ptr,&mbi,sizeof(MEMORY_BASIC_INFORMATION) );

if( mbi.Type == MEM_FREE )
{
mbi.AllocationBase = mbi.BaseAddress;
}

GetModuleFileName( (HINSTANCE)mbi.AllocationBase, szModuFile,240 );

sprintf(szTmpBuffer,"/t[ Module: 0x%x - %s ] /r/n",mbi.AllocationBase,szModuFile);

if(mbi.AllocationBase == mbi.BaseAddress &&
mbi.AllocationBase != NULL &&
strcmp(szThis,szModuFile) !=0 &&
strcmp(szProcess,szModuFile) != 0 )strcat(szBuffer , szTmpBuffer);

ptr += mbi.RegionSize;

}
}
break;
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}

　　编译生成ImageWalk.dll

　　这个函数用来列举系统的进程(为了简化，生成一个字符串)
void EnumProcess(char * szBuffer)//由你提供的字符串缓冲区，此处为了简化，假定这一缓冲区足够大
{
char szCurrentProcessInfo[512] = "" ;
char szExeName[256] = "" ;
char szAllProcessInfo[512*256] = "" ;
HANDLE hCurrentProcess = NULL ;
HMODULE hCurrentModule = NULL ;

HANDLE hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPALL , 0 );
PROCESSENTRY32 ppe;

ppe.dwSize = sizeof(ppe);

Process32First(hSnapshot,&ppe);

hCurrentProcess = OpenProcess( PROCESS_QUERY_INFORMATION|PROCESS_VM_READ|PROCESS_VM_READ|PROCESS_VM_OPERATION , FALSE, ppe.th32ProcessID);


GetModuleFileName( hCurrentModule , szExeName , 256 );

sprintf(szCurrentProcessInfo,"[ExeFileName:%s; Process ID:0x%x(%d); Thread Count:%d; Usage:%d]/r/n",
ppe.szExeFile, ppe.th32ProcessID ,ppe.th32ProcessID , ppe.cntThreads, ppe.cntUsage);

strcat(szAllProcessInfo,szCurrentProcessInfo);

while( Process32Next(hSnapshot , &ppe) )
{
hCurrentProcess = OpenProcess( PROCESS_QUERY_INFORMATION|PROCESS_VM_READ|PROCESS_VM_READ|PROCESS_VM_OPERATION, FALSE, ppe.th32ProcessID);

GetModuleFileName( (HINSTANCE)hCurrentProcess , szExeName , 256 );

sprintf(szCurrentProcessInfo,"[ExeFileName:%s; Process ID:0x%x(%d); Thread Count:%d; Usage:%d]/r/n",
ppe.szExeFile , ppe.th32ProcessID ,ppe.th32ProcessID, ppe.cntThreads, ppe.cntUsage );

strcat(szAllProcessInfo,szCurrentProcessInfo);
}

CloseHandle(hSnapshot);
hSnapshot = NULL;
strcpy(szBuffer,szAllProcessInfo);
}

//这个函数将ImageWalk.dll插入指定的线程，为了简化，假定ImageWalk.dll就在d:/
void InjectDll(DWORD m_ProcessID, char * szBuffer)//通过上面的EnumProcess可以获得Process ID
{//szBuffer，储存了被插入线程加载Dll的信息(不会出现ImageWalk.dll)为了简化，假定其足够大
char szTmp[256] = "";
size_t bytesread = 0;

HANDLE hProcess = OpenProcess(PROCESS_CREATE_THREAD|PROCESS_VM_OPERATION|PROCESS_VM_WRITE,FALSE,m_ProcessID);//打开进程，获取进程Handle
PSTR pszLibName = (PSTR)VirtualAllocEx(hProcess,NULL,64,MEM_COMMIT,PAGE_READWRITE);
//我们要在远程进程中运行一个新的线程，所传入的参数的内容必须放入远程进程的地址空间，
//使用VirtualAllocEx分配远程进程的内存
WriteProcessMemory(hProcess,pszLibName,(PVOID)"D:/ImageWalk.dll",17,NULL);
//将参数写入刚才分配好的空间

PTHREAD_START_ROUTINE pfnLoadLib = (PTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle("kernel32.dll"),"LoadLibraryA");
//获取LoadLibraryA在内村中的地址

if(pfnLoadLib && hProcess)
{
HANDLE hThread = CreateRemoteThread(hProcess,NULL,0,pfnLoadLib,pszLibName,0,NULL);
//创建一个线程，让远程进程执行 LoadLibraryA("D:/ImageWalk.dll")
//注意pfnLoadLib不能换成LoadLibraryA
WaitForSingleObject(hThread,INFINITE);
//等待线程结束

HANDLE hDll;

GetExitCodeThread(hThread, (DWORD*)&hDll);//获取LoadLibraryA("d:/imagewalk.dll")所返回的hModule

CloseHandle(hThread);

pfnLoadLib = (PTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle("kernel32.dll"),"FreeLibrary");

FILE * fp;
while( (fp = fopen("d:/image.txt","rt") ) == NULL)
{
Sleep(50);
}//等待ImageWalk.dll将信息写入交换文件


while( !feof(fp) )
{
bytesread=fread(szTmp,1,255,fp);
szTmp[bytesread] = '';
strcat(szBuffer,szTmp);

}

fclose(fp);

if(pfnLoadLib)
{//将ImageWalk卸载

hThread = CreateRemoteThread(hProcess,NULL,0,pfnLoadLib,hDll,0,NULL);
WaitForSingleObject(hThread,INFINITE);
CloseHandle(hThread);
}

}

VirtualFreeEx(hProcess,pszLibName,0,MEM_RELEASE);//释放刚才分配的远程进程的内存
CloseHandle(hProcess);
}