Now, we can pipe the output of John the Ripper (which will generate lots and lots of passwords from a list) into aircrack (which tests each password against the WPA key). We can specify that the list of passwords will come from stdin by using:
(where -a 2 means attack mode 2, or wpa, -e ASDF narrows down the keys being cracked to one in particular, and -w my_wordlist.list is the wordlist.)
$ john -w=10_million_password_list_top_1000.txt -session=attack1 -stdoutĪn example Aircrack command to crack a wireless network would be:Īircrack-ng -a 2 -e ASDF asdf-01.cap -w my_wordlist.list Here is an example John the Ripper command, which will send generated words to stdout, rather than using them to try and crack passwords: This allows us to potentially turn a wordlist of 10,000 words into a wordlist of 8 million words (meaning, we should choose wisely: we'll either be waiting a few minutes, or a few years.) By operating John in different modes, we can get different resulting wordlists. We'll be giving John the Ripper a wordlist, and based on the options we give it at the command line, it will generate a new, longer word list with many variations based on the original wordlist. The way we'll be using John the Ripper is as a password wordlist generator - not as a password cracker. To use Aircrack with John, you'll need to make sure you have both installed. There are certainly better ways to do it, but this can be a quick check for weak passwords. This allows you to just let John crank away. You can use John in conjunction with Aircrack, by telling John to just print out all of the words it has generated to stdout, and then using stdout as the aircrack wordlist/dictionary. It's good at generating a whole bunch of random passwords that are based on words, or modifications of words, or numbers. John the Ripper is a tool for guessing weak passwords on user accounts. One of the last steps, once you've captured the proper packets, is to brute-force guess the WPA passphrase.
We have met Aircrack before - it's a tool used for sniffing out the right WEP and WPA packets to crack the network's encryption. 5.5 Sending Aircrack Output to File (VERY IMPORTANT).5.3.1.3 Single Crack Mode with a Wordlist.3.5 Using Multiple Wordlists with John the Ripper.
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