一份进程注入的代码

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// Injection.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include "Injection.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// 唯一的应用程序对象

CWinApp theApp;

using namespace std;

typedef struct _RemotePara{//参数结构
   char pMessageBox[12];
   DWORD dwMessageBox;
}RemotePara;
//远程线程
DWORD __stdcall ThreadProc (RemotePara *lpPara){
   typedef int (__stdcall *MMessageBoxA)(HWND,LPCTSTR,LPCTSTR,DWORD);//定义MessageBox函数
   MMessageBoxA myMessageBoxA;
   myMessageBoxA =(MMessageBoxA) lpPara->dwMessageBox ;//得到函数入口地址
   myMessageBoxA(NULL,lpPara->pMessageBox ,lpPara->pMessageBox,0);//call
   return 0;
}
void EnableDebugPriv();//提升应用级调试权限

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
    const DWORD THREADSIZE=1024*4;
   DWORD byte_write;
   EnableDebugPriv();//提升权限
   HANDLE hWnd = ::OpenProcess (PROCESS_ALL_ACCESS,FALSE,760);
   if(!hWnd)return 0;
   void *pRemoteThread =::VirtualAllocEx(hWnd,0,THREADSIZE,MEM_COMMIT| MEM_RESERVE,PAGE_EXECUTE_READWRITE);
   if(!pRemoteThread)return 0;
   if(!::WriteProcessMemory(hWnd,pRemoteThread,&ThreadProc,THREADSIZE,0))
   return 0;

   //再付值
   RemotePara myRemotePara;
   ::ZeroMemory(&myRemotePara,sizeof(RemotePara));
   HINSTANCE hUser32 = ::LoadLibrary ("user32.dll");
   myRemotePara.dwMessageBox =(DWORD) ::GetProcAddress (hUser32 , "MessageBoxA");
   strcat(myRemotePara.pMessageBox,"hello/0");
   //写进目标进程
   RemotePara *pRemotePara =(RemotePara *) ::VirtualAllocEx (hWnd ,0,sizeof(RemotePara),MEM_COMMIT,PAGE_READWRITE);//注意申请空间时的页面属性
   if(!pRemotePara)return 0;
   if(!::WriteProcessMemory (hWnd ,pRemotePara,&myRemotePara,sizeof myRemotePara,0))return 0;

   //启动线程
   HANDLE hThread = ::CreateRemoteThread (hWnd ,0,0,(DWORD (__stdcall *)(void *))pRemoteThread ,pRemotePara,0,&byte_write);
   if(!hThread){
      return 0;
   }
return 0;
}

void EnableDebugPriv( void )
{
HANDLE hToken;
LUID sedebugnameValue;
TOKEN_PRIVILEGES tkp;

if ( ! OpenProcessToken( GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken ) )
return;
if ( ! LookupPrivilegeValue( NULL, SE_DEBUG_NAME, &sedebugnameValue ) ){
CloseHandle( hToken );
return;
}
tkp.PrivilegeCount = 1;
tkp.Privileges[0].Luid = sedebugnameValue;
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
if ( ! AdjustTokenPrivileges( hToken, FALSE, &tkp, sizeof tkp, NULL, NULL ) )
CloseHandle( hToken );

}

转自:http://blog.csdn.net/kugou123/archive/2004/12/29/233499.aspx