wget https://raw.githubusercontent.com/openwall/john/bleeding-jumbo/run/bitcoin2john.py
It's a Python script that extracts the hash from a Bitcoin Core wallet (wallet.dat) so that it can be cracked with John the Ripper to recover the wallet's passphrase.
Older versions of Bitcoin Core (pre-0.4.0) used weak encryption (SHA-256). Modern versions use AES-256-CBC with a key derived via OpenSSL’s EVP_BytesToKey using SHA-512. This is strong encryption, but the weak link is always the user's memory.
You need Bitcoin2john because you cannot simply "reset" a Bitcoin wallet password. Without the password, the private keys remain encrypted forever. Bitcoin2john translates that encrypted blob into a format that allows you to launch a brute-force, dictionary, or rule-based attack to recover the human-memorable password. Bitcoin2john
Create a custom wordlist from:
Use tools like cewl to scrape your old social media for phrases. wget https://raw
bitcoin2john is a script/utility designed to extract the hash containing the encrypted private key from a Bitcoin wallet file (typically wallet.dat). This extracted hash is formatted specifically for use with the password cracking tool John the Ripper (often referred to as "John").
It is not a standalone cracker; it is a hash extraction utility. It's a Python script that extracts the hash
Bitcoin2john scans the entire file. If you have a legacy wallet with a decade of transactions, the script may take minutes to run. This is normal. Be patient.
Situation: You have old_wallet.dat, 5 years old, encrypted. You think password is password123 but not sure.
# 1. Extract hash
python3 bitcoin2john.py old_wallet.dat > hash.txt
Cracking a single modern Bitcoin wallet with a high iteration count can take weeks on a CPU. Using a GPU with Hashcat is strongly recommended. Expect speeds of 5,000–50,000 hashes/second on a good GPU, versus 500–1,000 on a CPU.