Linux4Dummies: Mini guide for wifi cracking WEP and WPA

Hello and welcome to my tutorial about wireless networking. Today I'll be teaching you how easy it is to obtain access to a wireless protected network. There are lots of questions coming from the beginners on how to crack WEP/WPA/WPA2 keys and accessing their neighbor's connection. The purpose of this tutorial is to answer them. Judging from the "tutorials" on youtube which are either obsolete, or simply misguiding the listeners, this tutorial will be different. I will be covering all of the aspects and ways of hacking a network and gaining access to the router. This tutorial will be divided in 2 parts, such as WEP and WPA/WPA2 hacking. Please read below on what you need to succeed.

Backtrack 5 - I would suggest GNOME, 32Bit, ISO & Direct
Compatible Wireless Card
WPA Word List - Search via torrents to find one

Making a bootable USB
WEP encrypted networks
WPA/WPA2 encrypted networks
Commands Used

This is the most vital step that you need to succeed in before learning how to use backtrack and actually hack WEP/WPA networks. Please follow the easy steps below:

Download & Run UNetbootin
Tick Diskimage instead of Distribution
Select USB Drive as the type, and select your USB drive name - Example: F:\
Click OK and wait a couple of minutes - Note: It may freeze at some point, don't worry about that

What you need for this crack are a few simple things, a copy of backtrack 5 booting off a DVD or a flash drive and a compatible wireless card that supports packet injection. Now if you can't get to this screen, and you are stuck at the terminal you get when booting into backtrack, you need to type startx and wait a couple of minutes for the desktop to show. Okay so let's begin, so first we need to open a terminal. To do that, just click the little icon that's on the right side from System. Please see the image below:

Now type airmon-ng and that command displays our interfaces. In my case I have wlan0, and now we are going to put it into monitor mode. To do that, type airmon-ng start wlan0. As you can see on the picture below it says (monitor mode enabled on mon0), and we are going to be using mon0 instead of wlan0 as our interface.

Type airodump-ng mon0 and that will start scanning for wi-fi networks. As you can see, there is a network called SKIDHACKER. Take a note of the BSSID the DATA, the CHANNEL and the type of ENCRYPTION. Please refer to the image below, if you have any trouble getting to that point.

Now we are going to set it to lock on a specific network named SKIDHACKER. To do that, type airodump-ng -c (channel) -w WEPcrack --bssid (bssid of the network) mon0. Replace (channel) with the channel of the network you are trying to crack, and replace (bssid of the network) with the bssid of the network you want to crack.

Okay so as you can probably see the data is going really slow, and we need to boost that up. We are going to need a lot more data, so let's preform one of the aireplay commands that will boost that data. Firstly, open up a new terminal and type aireplay-ng -1 0 -a (bsisd) mon0 where (bssid) is the bssid of the network. Now if your wi-fi card is supported, you should see Association successful :-), if you don't see that then your card is not supported.

Now we are going to type in aireplay-ng -2 -p 0841 -c FF:FF:FF:FF:FF:FF -b (bssid) mon0. And now when the question Use this packet ? pops up, just push the letter y. And now as you can see in the image below, the data went high drastically.

Okay so now lets open a new terminal and we are going to attempt to crack it with the amount of data we have. I recommend getting over 20000 data before trying to crack it. So let's type aircrack-ng WEPcrack*.cap. Replace WEPcrack with the filename you chose before when capturing the data, and don't forget to add that asterisk after the file and the extension which is .cap.

And now it will attempt to crack the password. Just wait a couple of minutes for it to complete, and once it did it will say KEY FOUND! [ XX:XX:XX:XX:XX ] where the X's will be random numbers and/or letters. That's not it, now to connect you will need to remove the semicolumns. For an example, if we were to have 12:34:52:66:59, the password would be 1232526659. Just log in to your Windows OS, and connect using that password.

So lets begin. What you will need for this crack is a dictionary file that we are going to use to crack the WPA/WPA2 password. Remember, the bigger the dictionary file is the greater the chance you have in cracking the password. So now you are probably wondering, where do I get a dictionary file? Well, I don't know if this is allowed or not but I recently downloaded a 1.9GB dictionary file.

To get the file please PM me, I can't risk getting this tutorial taken down. Okay, so firstly open up a terminal and once we have the terminal open we are going to type in airmon-ng which will display our wireless interfaces. In my case I have wlan0, and now we are going to put it into monitor mode. To do that, type airmon-ng start wlan0. As you can see on the picture below it says (monitor mode enabled on mon0), and we are going to be using mon0 instead of wlan0 as our interface.

airodump-ng mon0

SKIDHАCKER

channel

BSSID