Generating Wordlists With Crunch to BruteForce or Crack Passwords| Kali Linux 2016.2
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In many of our password cracking disciplines, we often need to use a wordlist that will essentially attempt thousands of potential passwords per second. This is often referred to as a dictionary attack, even though we need not rely solely on dictionary words. These wordlists may have any combination of characters and words in an attempt to crack a complex password offline.
Sometimes we may have indications of the target's choice password or password components which may come from our knowledge of the target, e.g. girlfriend, neighbor, friend, etc. It could be their name, children's names, a pet's name, birthday, or job. We may also know the organization's password policy (e.g. minimum 8 characters, uppercase and lowercase, etc.).
In these cases, we may be able to generate a custom wordlist that reflects our knowledge of the target or the organization's password policy.
Kali Linux has built into it a tool called "crunch" that enables us to create a custom password-cracking wordlist that we can use with such tools like Hashcat, Cain and Abel, John the Ripper, Aircrack-ng, and others. This custom wordlist might be able to save us hours or days in password cracking if we can craft it properly.
Crunch is a utility that is used to create wordlists using letters, numbers, and symbols for every possible combination or according to specific rules. I will be covering this command-line tool in great depth, dissecting each option and demonstrating its purpose.
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Download The Latest version of Crunch here:
http://atominik.com/cse
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The Parameters:
-b : the maximum size of the wordlist (requires -o START)
-c : numbers of lines to write to the wordlist (requires -o START)
-d : limit the number of duplicate characters
-e : stop generating words at a certain string
-f : specify a list of character sets from the charset.lst file
-i : invert the order of characters in the wordlist
-l : allows the literal interpretation of @,%^ when using -t
-o : the output wordlist file
-p : print permutations without repeating characters (cannot be used with -s)
-q : Like the -p option except it reads the strings from a specified file
-r : resume a previous session (cannot be used with -s)
-s : specify a particular string to begin the wordlist with
-t : set a specific pattern of @,%^
-z : compress the output wordlist file, accompanied by -o
The Meta Characters:
@ represents lowercase letters
, represents uppercase letters
% represents numbers
^ represents special characters
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2017-04-06 16:23:27
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