hashcat to hack a keepass2 kdbx

hashcat -a 3 --stdout -1 "abcRH&3h" ?1what_you_know?l?s?a > candidates.txt

hashcat -m 13400 -a 0 -o cracked_password.txt hash.txt candidates.txt --status --status-timer=2 --potfile-disable

1. candidates.txt file is produced containing strings that match the given structure ?1what_you_know?l?s?a.

2. candidates.txt file is used for a dictionary attach on the hash.txt file computed from the kdbx keepass2 file in websites like https://keepass2john.com/

3. Any cracked password will be saved in the cracked_password.txt file