Cracking WEP Encryption with Aircrack in Backtrack 4

This tutorial demonstrates the vulnerabilities posed by implementing WEP encryption on a wireless network. It uses Aircrack with an Alfa AWUS036H wireless adapter in Backtrack 4.

Category:

Education

Tags:

• wep
• cracking
• wep cracking
• backtrack
• backtrack 4
• aircrack
• aircrack-ng
• Alfa
• AWUS036H
• Alfa AWUS036H
• WEP Encryption
• Wireless
• Hacking
• Ethical Hacking
• Ethical
• Ethical hacker
• Pen Tester
• Pen Testing
• Pen Test
• Penetration Testing
• insecure
• airodump-ng
• airmon-ng
• aireplay-ng
• airodump
• airmon
• aireplay
• infosec
• ian
• reynolds

[rickrocker]

At 5:23 I enter the aireplay-ng command and both the airodump and aireplay consoles stop.

The airodump console says "read failed: network is down, Interface mon0: ioctl(SIOCGIFINDEX) failed: No such device, Can't reopen mon0

The aireplay console says "[time] Sending Authentication request (Open system)read failed: Network is down, wi_read(): Illegal seek

I'm using BT4 and the same usb device as you. Any advice?

[multitaskingmale]

@rickrocker It sounds as though the adapter is having difficulty receiving while injecting packets. You can try to use the wireless adapters original interface address (usually wlan0 or wifi0) instead of mon0, as this might work. The original interface will still be in monitor mode and allow packet capture, as you have run the airmon-ng program. If that doesn't work, try stopping and restarting the interface and re-running the airmon-ng program. It's an issue with it being placed in monitor mode

[joeypesci]

Good vid apart from screen capture quality is so low can't read what you're typing

[multitaskingmale]

@joeypesci Make sure you have your subtitiles turned on on YouTube, as all the commands I type in I have displayed as text on the screen, which is perfectly readable. Hope that helps

[acsdon]

in the 3rd console enter: aireplay-ng -1 0 --a (bssid) wlan0

then wait for the #data in the 2nd window u opened to reach atleast 20000 or 5000

then in a new console window type : aircrack-ng wep-01.cap

it will say password decrypted successfully next time u enter that wireless use he password u found.

[alexk77ae]

Do you have any written instructions? I just bought the awus036h, and use backtrack R5. Its ok if there are technical words. I graduated cisco network accademy. im interested in instruction on WPA WPA2 and WEP thank you. 

[alban358]

damn i dont no nothing just to log in in facebok

[SabinIsStupid]

Does the AWUS036H device work out of the box for BT 3, 4, 5?

[brodygates]

Alfa AWUS036H does work for windows 7 / xp ........ how much for this card ..... does it have anttena......... is the anttena detachable??

[acsdon]

I CRACKED 3 KEYS USIN A SIMPLE FORMULA:

put ur card in monitor mode.

the go to konsole and enter: airodump-ng wlan0 (this will show a list of networks)

copy the bssid of the internet u wanna crack.

open new console win. without closin 1st one.

the enter: airodump-ng -w wep -c (channel no after -c) --bssid (bssid after --bssid) wlan0

then you will recieva lot of #data

open new console window and close the first one showin list of networks.

in the new console enter: written in next post

[ebby4u]

thanks.. your a life saver..