John the Ripper - Zip Password help - Latter half digit command advice

Question

I'm trying to use John to recover some old ZIP files with a password I remember half. One half being a word, the latter half being a mix of four to six digits. I remember the word, but not the digits after it, what line of code/command can I enter for John to start with the right password, then only to find the right number combination?

Answer 1

A mask attack would be the simplest way - you can use ?d to represent an unknown digit. So something like this for four digits:

john input.txt --mask="word?d?d?d?d"

And then adding on more ?d for additional digits if needed.