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Date: Mon, 22 Feb 2016 18:10:02 +0100
From: Marek Wrzosek <>
Subject: Re: Cracking zip files

Hi list,

I've two zip files, both with password 'password'. In one
( there is file hello with 'Hello, world!' in it ans with previous hello file. JtR is cracking this zip without
Second file - contains two test pages in pdf, and JtR only
response is:
No password hashes loaded (see FAQ)

Here are outputs of zip2john for both zip files:$zip2$*0*1*0*22577113145210b4*53db*e*528cd4370de59591f699fa532102*7a35bb447cf2cd3e3d62*$/zip2$$zip2$*0*1*0*4415572909d35406*1eb1*19be3*ZFILE**19c71*19cbc*ba511bb0d50f478e281f*$/zip2$

I suppose that first one is OK, because is small and JtR doesn't need to crack it, it only need output of zip2john. Both zip
files are in JtR's working directory.

Best Regards,

W dniu 22.02.2016 o 15:59, Alex pisze:
> Hi,
> After some experimenting, and help from Claudio on this list, I was
> able to figure out that there's something either wrong with the
> zip2john file or john itself:
> $ ./run/john --format:zip --test
> Will run 8 OpenMP threads
> Benchmarking: ZIP, WinZip [PBKDF2-SHA1 256/256 AVX2 8x]... (8xOMP) DONE
> Raw:    10816 c/s real, 2072 c/s virtual
> $ file
> Zip archive data
> $ ./run/zip2john > zipfile.john
> $ ./run/john zipfile.john
> Using default input encoding: UTF-8
> No password hashes loaded (see FAQ)
> $ cat zipfile.john
> I also tried creating a new zip file, and it was able to start
> cracking that one, so I know my installation is working properly.
> As I mentioned before, the previous install of John I had on the
> system was able to begin cracking this zip file without problem.
> Ideas greatly appreciated.
> Thanks,
> Alex

Marek Wrzosek

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