- A computer with a wifi card that supports packet injection (see more below)
- A blank DVD and a DVD drive (USB instructions are coming soon)
Wifi cards with packet injection support: For a PC, google your wifi card to see if it has packet injection, because there are too many cards to list here.
As far as I know, any intel Mac will work.
1) Download the BitTorrent version (faster, still legal since it is open source) of BackTrack here, or if you don't have a torrent client download it here. Do not worry, you will not have to install BackTrack 5r3, because, like many Linux operating systems, it is live so you can run it directly from the DVD.

2a) On a Mac, open the ISO file, then launch Disk Utility, click on the ISO, and burn the DVD. You must do this through disk utility and not the Finder, because Disk Utility makes the DVD bootable and Finder makes it into a data DVD.
2b) On a Windows 7 PC, double click on the ISO file (or if it opens an extraction program, right click and open with disk image burner). If you have a computer that has an earlier version of Windows or does not run Windows, feel free to comment and I will contact you with instructions.

3) Turn on your computer and press they key that allows you to change the boot device; On Macs, the key is alt/option, most PCs are F12, but if that doesn't work google it or comment. Then, use the arrow keys to select the DVD (on Macs it is labeled, "Windows," even though it is Linux) and push enter to confirm.

4) When you see this screen, just push enter and BackTrack will continue loading.

5) Use the arrow keys to select the "BackTrack Text - Default Boot Text Mode" (if it is not already selected) and press enter to start booting into BackTrack Live. This may take some time depending on your optical drive speed, however if it takes more than 7-10 minutes restart your computer and try again. My early 2008 iMac booted off it in around 2 minutes

6) Eventually, you will get to this screen (or something like it, it may be in a box with the BackTrack background behind it. It all depends on your graphics card). Here you want to type (without the quotes) "startx" in order to get the more user-friendly (GUI) interface

7) On the top bar (like the menu bar in OS X), click on the terminal icon (the only icon up there on the left next to the menus). Then type (without quotes) "airmon-ng" to find out your interface name. My interface (and most of yours) is called wlan0

8) Type (without quotes) "airmon-ng start yourinterfacename (the interface from the last step, like I said mine was wlan0).

9) Open fern-wifi-cracker.

10) Follow the steps in the video below. If, after you select your interface, the text "Monitor mode enabled..." does not show up below the interface box, quit the app and open it again. Then retry the steps in this video.
11) Finally, the WEP password should be cracked! If it didn't work, try another method under the "Gathering Packets"

Note: BackTrack Linux is an operating system specifically designed for hacking networks and network-based services (like Facebook, email, etc). More BackTrack tutorials are coming!

04/23/2013 5:35pm

This was so helpful! Now I will never be without wifi. You are a true superhero!


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