Crunch can create a word list based on criteria you specify. The output from crunch can be sent to the screen, file, or to another program.
sudo apt install crunch
brew install crunch
crunch <min-len> <max-len> [<charset string>] [options]
||Lower case alpha characters||abcdefghijklmnopqrstuvwxyz|
||Upper case alpha characters||ABCDEFGHIJKLMNOPQRSTUVWXYZ|
||Special characters including space||
min-len The minimum length string you want crunch to start at. This option is required even for parameters that won't use the value. max-len The maximum length string you want crunch to end at. This option is required even for parameters that won't use the value. charset string You may specify character sets for crunch to use on the command line or if you leave it blank crunch will use the default character sets. The order MUST BE lower case characters, upper case characters, numbers, and then symbols. If you don't follow this order you will not get the results you want. You MUST specify either values for the character type or a plus sign. NOTE: If you want to include the space character in your character set you must escape it using the \ character or enclose your character set in quotes i.e. "abc ". See the examples 3, 11, 12, and 13 for examples. -b number[type] Specifies the size of the output file, only works if -o START is used, i.e.: 60MB The output files will be in the format of starting letter-ending letter for example: ./crunch 4 5 -b 20mib -o START will generate 4 files: aaaa-gvfed.txt, gvfee-ombqy.txt, ombqz-wcydt.txt, wcydu-zzzzz.txt valid values for type are kb, mb, gb, kib, mib, and gib. The first three types are based on 1000 while the last three types are based on 1024. NOTE There is no space between the number and type. For example 500mb is correct 500 mb is NOT correct. -c number Specifies the number of lines to write to output file, only works if -o START is used, i.e.: 60 The output files will be in the format of starting letter-ending letter for example: ./crunch 1 1 -f /pentest/password/crunch/charset.lst mixalpha-numeric-all-space -o START -c 60 will result in 2 files: a-7.txt and 8-\ .txt The reason for the slash in the second filename is the ending character is space and ls has to escape it to print it. Yes you will need to put in the \ when specifying the filename because the last character is a space. -d numbersymbol Limits the number of duplicate characters. -d [email protected] limits the lower case alphabet to output like aab and aac. aaa would not be generated as that is 3 consecutive letters of a. The format is number then symbol where number is the maximum number of consecutive characters and symbol is the symbol of the the character set you want to limit i.e. @,%^ See examples 17-19. -e string Specifies when crunch should stop early -f /path/to/charset.lst charset-name Specifies a character set from the charset.lst -i Inverts the output so instead of aaa,aab,aac,aad, etc you get aaa,baa,caa,daa,aba,bba, etc -l When you use the -t option this option tells crunch which symbols should be treated as literals. This will allow you to use the placeholders as letters in the pattern. The -l option should be the same length as the -t option. See example 15. -m Merged with -p. Please use -p instead. -o wordlist.txt Specifies the file to write the output to, eg: wordlist.txt -p charset OR -p word1 word2 ... Tells crunch to generate words that don't have repeating characters. By default crunch will generate a wordlist size of #of_chars_in_charset ^ max_length. This option will instead generate #of_chars_in_charset!. The ! stands for factorial. For example say the charset is abc and max length is 4.. Crunch will by default generate 3^4 = 81 words. This option will instead generate 3! = 3x2x1 = 6 words (abc, acb, bac, bca, cab, cba). THIS MUST BE THE LAST OPTION! This option CANNOT be used with -s and it ignores min and max length however you must still specify two numbers. -q filename.txt Tells crunch to read filename.txt and permute what is read. This is like the -p option except it gets the input from filename.txt. -r Tells crunch to resume generate words from where it left off. -r only works if you use -o. You must use the same command as the original command used to generate the words. The only exception to this is the -s option. If your original command used the -s option you MUST remove it before you resume the session. Just add -r to the end of the original command. -s startblock Specifies a starting string, eg: 03god22fs -t @,%^ Specifies a pattern, eg: @@[email protected]@@@ where the only the @'s, ,'s, %'s, and ^'s will change. @ will insert lower case characters , will insert upper case characters % will insert numbers ^ will insert symbols -u The -u option disables the printpercentage thread. This should be the last option. -z gzip, bzip2, lzma, and 7z Compresses the output from the -o option. Valid parameters are gzip, bzip2, lzma, and 7z. gzip is the fastest but the compression is minimal. bzip2 is a little slower than gzip but has better compression. 7z is slowest but has the best compression.
$ crunch 10 10 -t Welkom%%%% Crunch will now generate the following amount of data: 110000 bytes 0 MB 0 GB 0 TB 0 PB Crunch will now generate the following number of lines: 10000 Welkom0000 Welkom0001 Welkom0002 Welkom0003 Welkom0004 Welkom0005 Welkom0006 Welkom0007 Welkom0008 Welkom0009 Welkom0010 [...]
$ crunch 4 6 0123456789ABCDEF -o wordlist.txt Crunch will now generate the following amount of data: 124059648 bytes 118 MB 0 GB 0 TB 0 PB Crunch will now generate the following number of lines: 17891328 crunch: 100% completed generating output
This will result in for example: