课时10 基本工具-NETCAT（telnet/banner、传输文本信息）
常用工具
经常使用且功能强大
安全从业者必不可少的帮手
Nc / ncat
Wireshack
Tcpdump
NETCAT-----NC
网络工具中的瑞士军刀——小身材、大智慧
侦听模式/传输模式
telnet/获取banner信息
传输文本信息
传输文件目录
加密传输文件
远程控制/木马
加密所有流量
流媒体服务器
远程克隆硬盘
NC-----TELNET/banner
nc -nv 1.1.1.1 10
nc -nv 1.1.1.1 25
nc -nv 1.1.1.1 80
root:~# nc -h //它的基本用法
GNU netcat 0.7.0, a rewrite of the famous networking tool.
Basic usages:
connect to somewhere: nc [options] hostname port [port] ...
listen for inbound: nc -l -p port [options] [hostname] [port] ...
tunnel to somewhere: nc -L hostname:port -p port [options]
Mandatory arguments to long options are mandatory for short options
too.
Options:
-c, --close close connection on EOF from stdin
-e, --exec=PROGRAM program to exec after connect
-g, --gateway=LIST source-routing hop point[s], up to 8
-G, --pointer=NUM source-routing pointer: 4, 8, 12, ...
-h, --help display this help and exit
-i, --interval=SECS delay interval for lines sent, ports scanned
-l, --listen listen mode, for inbound connects
-L, --tunnel=ADDRESS:PORT forward local port to remote address
-n, --dont-resolve numeric-only IP addresses, no DNS
-o, --output=FILE output hexdump traffic to FILE (implies -x)
-p, --local-port=NUM local port number
-r, --randomize randomize local and remote ports
-s, --source=ADDRESS local source address (ip or hostname)
-t, --tcp TCP mode (default)
-T, --telnet answer using TELNET negotiation
-u, --udp UDP mode
-v, --verbose verbose (use twice to be more verbose)
-V, --version output version information and exit
-x, --hexdump hexdump incoming and outgoing traffic
-w, --wait=SECS timeout for connects and final net reads
-z, --zero zero-I/O mode (used for scanning)
Remote port number can also be specified as range. Example: '1-1024'
我用的是GNU的netcat,比起@stake公司的netcat多了-c 选项,不过这是很有用
的一个选项,后面我们会讲到.还有GNU的-L,-t ,-T选项和@stake的-L -t 用途
是不一样的,自己琢磨吧.
root:~# nc -v //端口扫描
root:~# mtr 200.106.0.20 //追踪一下路由
root:~# nc -vn //显示详细的终端信息，不会Dns解析
root:~# ping pop3. 163.com //连接ip邮箱
root:~# nc -vn 123.125.50.29 110
USER
USER 12asdfg
USER ZmfuZZhvbmcueXVhbkAxNjMuY29tCg==
root:~# base64
fanghong.yuan@163.com
ZmfuZZhvbmcueXVhbkAxNjMuY29tCg==
root:~# ping smtp.163.com
root:~# nc -nv 123.125.20.138 25
220 163.com Anti-spam GT for Coremail System(163com[20141201])
ehlo
500 Errot: bad syntax
ehlo yuanfh
250-mail
250-PIPELINING
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-coremail 1uxr2xKj7G0xkI17xGrU710s8FY2U3Uj8Cz8x1UUUUU7Ic2IOY2Urz03NIUCa0xDrUUUUj
250-ARARTTLS
250 8BIMIME
AUTH LOGIN
344 dxNLcm5hbWU6
fanghong.yuan@163.com
535 Error: authentication failed
root:~# nc -nv 123.125.20.138 25
220 163.com Anti-spam GT for Coremail System(163com[20141201])
ehlo
500 Errot: bad syntax
ehlo yuanfh
250-mail
250-PIPELINING
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-coremail 1uxr2xKj7G0xkI17xGrU710s8FY2U3Uj8Cz8x1UUUUU7Ic2IOY2Urz03NIUCa0xDrUUUUj
250-ARARTTLS
250 8BIMIME
AUTH LOGIN
344 dxNLcm5hbWU6
<fanghong.yuan@163.com>
535 Error: authentication failed
root:~# nc -nv 10.1.1.11 80
(UNKNOWN) [10.1.1.11] 80 (http) open
head /
<html><head><titile>Metasploitable2 - Linux</title></head><body>
<pre>
warning: Never expose this VM to an untrusted network!
Contact: msfdev[at]metasploit.com
Login with msfadmin/msfadmin to get started
</pre>
<ul>
<li><a href="/twiki/">Twiki</a></li>
<li><a href="/phpMyAdmin/">phpMyAdmin</a></li>
<li><a href="/mutillidae/">Mutillidae</a></li>
<li><a href="/dvwa/">DVWA</a></li>
<li><a href="/dav/">wevDAV</a></li>
</ul>
</body>
</html>
NC-----传输文本信息
A: nc -l -p 4444
B: nc -nv 1.1.1.1 4444
远程电子取证信息收集
开启两台系统kalix64和kalix32
kali 32Bit
root@kali:~# nc -l -p 333 //打开端口333
root@kali:~# netstat -pantu | grep 333 //查看端口33是否打开
10.1.1.12
kali 64Bit
root:~# nc -nv 10.1.1.12 333
(UNKNOWN) [10.1.1.12] 333 (?) open
然后两台电脑实现聊天的功能！
远程电子取证
kali 32Bit
root@kali:~# nnc -l -p 333 //打开端口333
kali 64Bit
root:~# ls -l | nc -nv 10.1.1.12 333
(UNKNOWN) [10.1.1.12] 333 (?) open
root:~# ps aux //查看可疑的进程
kali 32Bit
root@kali:~# nc -l -p 333 > ps.txt 监听333端口有信息重定向到ps.txt文件里
kali 64Bit
root:~# ps aux | nc -nv 10.1.1.12 333 -q 1
(UNKNOWN) [10.1.1.12] 333 (?) open
kali 32Bit
root@kali:~# cat ps.txt //查看ps.txt文件
kali 32Bit
root@kali:~# nc -l -p 333 > lsof.txt
kali 64Bit
root:~# lsof | nc -nv 10.1.1.12 333 -q 1
(UNKNOWN) [10.1.1.12] 333 (?) open
kali 32Bit
root@kali:~# more lsof.txt //这个文件比较多，所以用more查看文件