Date: Tue, 15 Sep 2020 18:43:58 +0100 From: Jasper Jones <jazjones9292@...il.com> To: john-users@...ts.openwall.com Subject: cracking encrypted zip file Hi I'm beyond embarrassed to have to do this, but I'm at my wits' end trying to open a zip archive from about three years ago. It contains a cryptocurrency wallet file. I used (I believe) the standard 256-AES settings on 7-zip to compress and encrypt a wallet file, using .zip rather than .7z format. Being aware of how easy it is to forget passwords, I believe I used a combination of multiple components that I've used as the core of longer passwords, mostly for non-critical things. The encrypted file was stored on several thumb-drives which I stored at various secure locations. My (idiotic) thinking was that even if I didn't remember the exact password, I'd be able to guess it easily enough. Of course, I've tried and that isn't working :-/ I'm reasonably certain the password contains two or three main components, selected from a couple of words and a long number, linked with some combination of punctuation. I've downloaded John the Ripper (64 bit Windows), but as a non-techie I'm really struggling with it. The first issue is that I believe I need to use zip2john.exe to get the hash from the zip file. It spits out a very long string of data, starting with $zip2$, but ends with a message saying that "wallet.zip/wallet.dat is not encrypted, or stored with a non-handled compression type". I wondered whether I needed to use the 7z2john.pl (a perl script?), given I used 7-zip to generate the encrypted file? I've never used perl, so not sure how I'd go about this (and haven't yet started looking in case that isn't needed). Does anyone have any thoughts about how best to approach extracting the hash? Hopefully once I have that I'll be able to work out how to use JtR to break the password. Many, many thanks in advance for any help you can offer. Kind regards Jasper
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