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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?

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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.

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  • It worked perfectly! Thanks a ton!!!
    – LEGEND-001
    Commented Aug 20, 2023 at 21:33
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    @LEGEND-001 if this answered your question, you can click the green check mark to accept the answer Commented Aug 21, 2023 at 7:17

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