John The Ripper

Open Source password security auditing and password recovery tool available for many operating systems.


Read ‘INSTALL’ file in ‘doc’ folder for correct installation procedure after cloning the repo.

git clone




John the Ripper 1.9.0-jumbo-1+bleeding-65d8222ef 2020-09-22 17:11:48 +0200 OMP [linux-gnu 64-bit x86_64 AVX2 AC]
Copyright (c) 1996-2019 by Solar Designer and others

--single[=SECTION[,..]]    "single crack" mode, using default or named rules
--single=:rule[,..]        same, using "immediate" rule(s)
--wordlist[=FILE] --stdin  wordlist mode, read words from FILE or stdin
                  --pipe   like --stdin, but bulk reads, and allows rules
--loopback[=FILE]          like --wordlist, but extract words from a .pot file
--dupe-suppression         suppress all dupes in wordlist (and force preload)
--prince[=FILE]            PRINCE mode, read words from FILE
--encoding=NAME            input encoding (eg. UTF-8, ISO-8859-1). See also
                           doc/ENCODINGS and --list=hidden-options.
--rules[=SECTION[,..]]     enable word mangling rules (for wordlist or PRINCE
                           modes), using default or named rules
--rules=:rule[;..]]        same, using "immediate" rule(s)
--rules-stack=SECTION[,..] stacked rules, applied after regular rules or to
                           modes that otherwise don't support rules
--rules-stack=:rule[;..]   same, using "immediate" rule(s)
--incremental[=MODE]       "incremental" mode [using section MODE]
--mask[=MASK]              mask mode using MASK (or default from john.conf)
--markov[=OPTIONS]         "Markov" mode (see doc/MARKOV)
--external=MODE            external mode or word filter
--subsets[=CHARSET]        "subsets" mode (see doc/SUBSETS)
--stdout[=LENGTH]          just output candidate passwords [cut at LENGTH]
--restore[=NAME]           restore an interrupted session [called NAME]
--session=NAME             give a new session the NAME
--status[=NAME]            print status of a session [called NAME]
--make-charset=FILE        make a charset file. It will be overwritten
--show[=left]              show cracked passwords [if =left, then uncracked]
--test[=TIME]              run tests and benchmarks for TIME seconds each
                           (if TIME is explicitly 0, test w/o benchmark)
--users=[-]LOGIN|UID[,..]  [do not] load this (these) user(s) only
--groups=[-]GID[,..]       load users [not] of this (these) group(s) only
--shells=[-]SHELL[,..]     load users with[out] this (these) shell(s) only
--salts=[-]COUNT[:MAX]     load salts with[out] COUNT [to MAX] hashes
--costs=[-]C[:M][,...]     load salts with[out] cost value Cn [to Mn]. For
                           tunable cost parameters, see doc/OPTIONS
--save-memory=LEVEL        enable memory saving, at LEVEL 1..3
--node=MIN[-MAX]/TOTAL     this node's number range out of TOTAL count
--fork=N                   fork N processes
--pot=NAME                 pot file to use
--list=WHAT                list capabilities, see --list=help or doc/OPTIONS
--devices=N[,..]           set OpenCL device(s) (see --list=opencl-devices)
--format=NAME              force hash of type NAME. The supported formats can
                           be seen with --list=formats and --list=subformats


Run benchmark

$ ./john --test  
Will run 8 OpenMP threads
Benchmarking: descrypt, traditional crypt(3) [DES 256/256 AVX2]... (8xOMP) DONE
Many salts: 39010K c/s real, 4953K c/s virtual
Only one salt:  28773K c/s real, 3642K c/s virtual

Benchmarking: bsdicrypt, BSDI crypt(3) ("_J9..", 725 iterations) [DES 256/256 AVX2]... (8xOMP) DONE
Speed for cost 1 (iteration count) of 725
Many salts: 1289K c/s real, 163295 c/s virtual
Only one salt:  1171K c/s real, 148191 c/s virtual

Benchmarking: md5crypt, crypt(3) $1$ (and variants) [MD5 256/256 AVX2 8x3]... (8xOMP) DONE
Many salts: 317568 c/s real, 40173 c/s virtual
Only one salt:  308352 c/s real, 39007 c/s virtual

Benchmarking: md5crypt-long, crypt(3) $1$ (and variants) [MD5 32/64]... (8xOMP) DONE
Raw:    38624 c/s real, 4898 c/s virtual

Benchmarking: bcrypt ("$2a$05", 32 iterations) [Blowfish 32/64 X3]... (8xOMP) DONE
Speed for cost 1 (iteration count) of 32
Raw:    5910 c/s real, 746 c/s virtual

Benchmarking: scrypt (16384, 8, 1) [Salsa20/8 128/128 AVX]... (8xOMP) DONE
Speed for cost 1 (N) of 16384, cost 2 (r) of 8, cost 3 (p) of 1
Raw:    261 c/s real, 33.4 c/s virtual

Benchmarking: LM [DES 256/256 AVX2]... (8xOMP) DONE
Raw:    87687K c/s real, 11141K c/s virtual

Crack NTLM

$ ./john --format=nt ~/ntlm.txt --wordlist ~/self.txt
Using default input encoding: UTF-8
Loaded 2344522 password hashes with no different salts (NT [MD4 256/256 AVX2 8x3])
Warning: no OpenMP support for this hash type, consider --fork=8
Press 'q' or Ctrl-C to abort, almost any other key for status
123456           (?)
12345            (?)
password         (?)
527g 0:00:00:00 DONE (2020-12-01 20:42) 13175g/s 88650p/s 88650c/s 8312MC/s !@#$%..sss
Warning: passwords printed above might not be all those cracked
Use the "--show --format=NT" options to display all of the cracked passwords reliably
Session completed.

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