is a standalone Python utility script included with the John the Ripper (JtR) password security suite. Its primary purpose is to extract the encrypted master key (hash) from a Bitcoin or Litecoin wallet.dat file so it can be cracked using recovery tools like John the Ripper or Hashcat . Technical Function

To use the tool, you must have Python installed and the bitcoin2john.py script downloaded from the John the Ripper repository .