The password was for an encrypted USB drive containing 7002 bitcoins. 

The device belonged to Stefan Thomas, a Swiss crypto entrepreneur who had forgotten the password. 

The Unciphered team spent eight months figuring out how to crack IronKey passwords. 

They allegedly developed a technique that allows them to recover Bitcoin even with a forgotten password. 

The most common tools used to crack Bitcoin wallet passwords are Hashcat and John The Ripper. To maximize your chances of success, you should give the program a list of common passwords that you use, and any other passwords you might have used.