John The Ripper

John The Ripper

John The Ripper

DICTIONARY ATTACK

• john --format=#type --wordlist=dict.txt hash.txt

BRUTEFORCE ATTACK

• john --format=#type hash. txt

MASK ATTACK

• john --format=#type --mask=?l?l?l?l?l?l hash.txt -min-len=6

INCREMENTAL ATTACK

• john --incremental hash.txt

DICTIONARY + RULES ATTACK

• john --format=#type --wordlist=dict.t

Other Notes:

BENCHMARK TEST

• john --test

SESSION NAME

• john hash.txt --session=example_name

SESSION RESTORE

• john --restore=example_name

SHOW CRACKED RESULTS -john hash.txt --pot=<john potfile> --show

WORDLIST GENERATION

• john --wordlist=dict.txt --stdout --external:[filter name] > out.txt

CRACKING SSH KEYS:

• /usr/share/john/ssh2john.py id_rsa > hash.john
• john --wordlist=/usr/share/wordlists/rockyou.txt hash.john

CRACKING KRB5TGS KEYS

• john --format=krb5tgs --wordlist=<passwords_file krb-key.txt

Cracking ASREP Keys

• john --format=krb5asrep --wordlist=<passwords_file asrep-key.txt

Cracking an unshadowed file: unshadow passwd shadow > unshadowed john -incremental -users:<user list> <file to crack> i.e.: john -incremental -users:victim unshadowed

Show cracked passwords: john --show unshadowed