The hash of a mas­ter pass­word of a Keep­ass kdbx file can be extract­ed with keepass2john Database.kdbx > keepass.hash Then, crack it: /opt/hashcat/hashcat keepass.hash /opt/password_lists/rockyou.txt -m 13400 -r /opt/hashcat/rules/rockyou-30000.rule (!) If there is an error regard­ing salt, check if you have the user­name like “user:” at the begin­ning of the file. Remove it.