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The BACKTRACK alone does not crack the WEP, you must also be ready on the network you want to crack, to accelerate the process of cracking, and without forgetting that we must be patient because sometimes even if the signal is equal to 0 or more (+), the packet recovery and cracking may take longer 3min (1 hour and even more!). Auditor Security Collection and Whax merge to create BackTrack. Live CD and live USB capability. March 6th 2007. Kernel 2.6.20. Metasploit2 and Metsploit3 support. Redesigned menu structure. June 19th 2008. Kernel 2.6.21.5. Saint and Maltego added. January 9th 2010. Manual-backtrack-4-wep.pdf - Manual Backtrack 4 Wep Crack wep on backtrack 5, wep cracking backtrack 5 wifi hacking, backtrack 5, how to crack, wifi, wep, wpa wpa2, tutorial, hack wep key. Salut je suis novice sur le crack wep.jai le backtrack 4 release 1 que j'ai telecharger sur remote-exploit.org.le probleme est que quand j l boot j n'arrive pas a atteindre ton depart pour pouvoir continuer. Crack wep on backtrack 5, wep cracking backtrack 5 wifi hacking, backtrack 5, how to crack, wifi, wep, wpa wpa2, tutorial, hack wep key backtrack, hack wifi. To crack WEP, you'll need to launch Konsole, BackTrack's built-in command line. It's right there on the taskbar in the lower left corner, second button to the right. Now, the commands.

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Hacking a WiFi network with Backtrack is quite simple all you have to do is enter certain commands and you are done.In one of my previous post i told you how you can hack and Crack WiFi Password using hydra. Keep in mind that in order to Crack WiFi Password you will need lots of patience,so just be patience and you will be able to crack WiFi password of your neighbor :)
In this tutorial we will be using Backtrack 5 to crack WiFi password.

NOTE: This Tutorial Is For Education Purpose Only Don’t Misuse It,We Will Not Hold Any Responsibility If It Is Being Misused !

Requirements:

Here is what you would require to crack a WEP key:

1. Backtrack or any other Linux distro with aircrack-ng installed

2. A Wifi adapter capable of injecting packets , For this tutorial I will use Alfa AWUS036H which is a very popular card and it performs well with Backtrack

You can find compatible wifi card lists HERE

Step 1:

Login to your Backtrack linux and plug in the Wifi adapter,then open the new consol and start typing the following commands:

ifconfig wlan0 up

Here wlan0 is the name of wireless card ,it may be different for your case.To see all the connected cards to your system simply type' iwconfig ' or you can find it by typing ' airmon-ng '.

Step 2:

You have to put your wireless adapter into monitor mode,to do so type the following command:

airmon-ng start (your interface)

Example: airmon-ng start wlan0

Now when the new interface mon0 will be created you can see the new interface by typing ' iwconfig mon0 '

Step 3:

Now you will need to find the WEP network around you,you can do it by typing the following command:

airdump-ng mon0

After typing the coomand you will see all the available WIFI

In this,Bssid shows the mac address of the AP, CH shows the channel in which AP is broadcasted and Essid shows the name broadcasted by the AP, Cipher shows the encryption type.
Look for the WEP protected network in this tutorial we are taking 'pack' as my target.

Step 4:

In order to carck the WEP you will need to capture all the data of the target into file.To do this type the folllowing command and you need to speed up the process too.

airodump-ng mon0 --bssid -c (channel ) -w (file name to save )

In my case channel is 6 and has bssid as 00:26:75:06:CF;C6 and i am going to save the captured data as 'wep'.

Step 5:

In order to speed up the capturing rate open the new terminal and type:

aireplay-ng - 1 3 -a (bssid of the target ) (interface)

in my case:
aireplay-ng - 1 3 -a 00:26:75:06:CF;C6 mon0

now type the following command:

aireplay-ng-2-p 0841 -c ff:ff:ff:ff:ff:ff -b (bssid of target) (interface)

and press 'y' when asked to Use this Packet.

in my case :
aireplay-ng-2-p 0841 -c ff:ff:ff:ff:ff:ff -b 00:26:75:06:CF;C6 ) mon0

Step 6:

Open new terminal and type

aircrack-ng -n 64 -b (bssid) saved file

in my case :
aircrack-ng -n 64 -b00:26:75:06:CF;C6 wep

Once the cracking is successful you will be given Key,just remove the inbetween colons from the key and use it.

You already know that if you want to lock down your Wi-Fi network, you should opt for WPA encryption because WEP is easy to crack. But did you know how easy? Take a look.

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Today we're going to run down, step-by-step, how to crack a Wi-Fi network with WEP security turned on. But first, a word: Knowledge is power, but power doesn't mean you should be a jerk, or do anything illegal. Knowing how to pick a lock doesn't make you a thief. Consider this post educational, or a proof-of-concept intellectual exercise.

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What You'll Need

Unless you're a computer security and networking ninja, chances are you don't have all the tools on hand to get this job done. Here's what you'll need:

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A compatible wireless adapter—This is the biggest requirement. You'll need a wireless adapter that's capable of packet injection, and chances are the one in your computer is not. After consulting with my friendly neighborhood security expert, I purchased an Alfa AWUS050NH USB adapter, pictured here, and it set me back about $50 on Amazon. Update: Don't do what I did. Get the Alfa AWUS036H, not the US050NH, instead.The guy in this video below is using a $12 model he bought on Ebay (and is even selling his router of choice). There are plenty of resources on getting aircrack-compatible adapters out there.
A BackTrack Live CD. We already took you on a full screenshot tour of how to install and use BackTrack 3, the Linux Live CD that lets you do all sorts of security testing and tasks. Download yourself a copy of the CD and burn it, or load it up in VMware to get started.
A nearby WEP-enabled Wi-Fi network. The signal should be strong and ideally people are using it, connecting and disconnecting their devices from it. The more use it gets while you collect the data you need to run your crack, the better your chances of success.
Patience with the command line. This is an ten-step process that requires typing in long, arcane commands and waiting around for your Wi-Fi card to collect data in order to crack the password. Like the doctor said to the short person, be a little patient.

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Crack That WEP

To crack WEP, you'll need to launch Konsole, BackTrack's built-in command line. It's right there on the taskbar in the lower left corner, second button to the right. Now, the commands.

First run the following to get a list of your network interfaces:

The only one I've got there is labeled ra0. Yours may be different; take note of the label and write it down. From here on in, substitute it in everywhere a command includes (interface).

Now, run the following four commands. See the output that I got for them in the screenshot below.

If you don't get the same results from these commands as pictured here, most likely your network adapter won't work with this particular crack. If you do, you've successfully 'faked' a new MAC address on your network interface, 00:11:22:33:44:55.

Now it's time to pick your network. Run:

To see a list of wireless networks around you. When you see the one you want, hit Ctrl+C to stop the list. Highlight the row pertaining to the network of interest, and take note of two things: its BSSID and its channel (in the column labeled CH), as pictured below. Obviously the network you want to crack should have WEP encryption (in the ENC) column, not WPA or anything else.

Like I said, hit Ctrl+C to stop this listing. (I had to do this once or twice to find the network I was looking for.) Once you've got it, highlight the BSSID and copy it to your clipboard for reuse in the upcoming commands.

Now we're going to watch what's going on with that network you chose and capture that information to a file. Run:

Where (channel) is your network's channel, and (bssid) is the BSSID you just copied to clipboard. You can use the Shift+Insert key combination to paste it into the command. Enter anything descriptive for (file name). I chose 'yoyo,' which is the network's name I'm cracking.

You'll get output like what's in the window in the background pictured below. Leave that one be. Open a new Konsole window in the foreground, and enter this command:

Here the ESSID is the access point's SSID name, which in my case is yoyo. What you want to get after this command is the reassuring 'Association successful' message with that smiley face.

You're almost there. Now it's time for:

Here we're creating router traffic to capture more throughput faster to speed up our crack. After a few minutes, that front window will start going crazy with read/write packets. (Also, I was unable to surf the web with the yoyo network on a separate computer while this was going on.) Here's the part where you might have to grab yourself a cup of coffee or take a walk. Basically you want to wait until enough data has been collected to run your crack. Watch the number in the '#Data' column—you want it to go above 10,000. (Pictured below it's only at 854.)

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Depending on the power of your network (mine is inexplicably low at -32 in that screenshot, even though the yoyo AP was in the same room as my adapter), this process could take some time. Wait until that #Data goes over 10k, though—because the crack won't work if it doesn't. In fact, you may need more than 10k, though that seems to be a working threshold for many.

Once you've collected enough data, it's the moment of truth. Launch a third Konsole window and run the following to crack that data you've collected:

Here the filename should be whatever you entered above for (file name). You can browse to your Home directory to see it; it's the one with .cap as the extension.

If you didn't get enough data, aircrack will fail and tell you to try again with more. If it succeeds, it will look like this:

The WEP key appears next to 'KEY FOUND.' Drop the colons and enter it to log onto the network.

Problems Along the Way

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With this article I set out to prove that cracking WEP is a relatively 'easy' process for someone determined and willing to get the hardware and software going. I still think that's true, but unlike the guy in the video below, I had several difficulties along the way. In fact, you'll notice that the last screenshot up there doesn't look like the others—it's because it's not mine. Even though the AP which I was cracking was my own and in the same room as my Alfa, the power reading on the signal was always around -30, and so the data collection was very slow, and BackTrack would consistently crash before it was complete. After about half a dozen attempts (and trying BackTrack on both my Mac and PC, as a live CD and a virtual machine), I still haven't captured enough data for aircrack to decrypt the key.

So while this process is easy in theory, your mileage may vary depending on your hardware, proximity to the AP point, and the way the planets are aligned. Oh yeah, and if you're on deadline—Murphy's Law almost guarantees it won't work if you're on deadline.

Got any experience with the WEP cracking courtesy of BackTrack? What do you have to say about it? Give it up in the comments.