Thursday, July 9, 2009

WEP Cracking

This is an extremely easy way on cracking WEP encrypted networks. We will be using SpoonWep in BackTrack 3. Is you dont have BackTrack 3 already check out the previous post, HERE!

What you will need:
-BackTrack 3: Download
-A compatible wireless adapter: Here
-This wireless adapter I recommend: Alfa AWUS036H


SpoonWep in BackTrack 3 (booted on a PC or Mac or in VMware)
With the same BackTrack 3 live CD or VMware image that we used on the previous post, you can bypass almost all the commands you see there and use SpoonWep instead. When you're booted into BackTrack 3, from the KDE menu, choose BackTrack>Radio Network Analysis>80211>Cracking>SpoonWep. You'll get the window you see in the screenshot here. All you need to run SpoonWep against a Wi-Fi network is its channel and BSSID. (I used the previously-mentioned airodump-ng command to get the BSSID of my router; you can also use Kismet in the BackTrack>Radio Network Analysis>80211>Analyser folder of BackTrack's KDE menu to get that info.)

Enter the BSSID in the "Victim Mac" field of SpoonWep. Choose your Wi-Fi adapter from the drop-down, set the channel, and launch your attack. Increase or decrease your injection rate using the slider.

As for the BackTrack 4 pre-release, supports more wireless cards and can crack passwords faster using aircrack-ptw. BT4 consistently froze on me, but I believe it was the version of the Alfa USB adapter I was using that caused the problem, so your mileage will likely vary.

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