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Date: Wed, 16 Sep 2020 06:57:09 +0100
From: Jasper Jones <jazjones9292@...il.com>
To: john-users@...ts.openwall.com
Subject: Re: cracking encrypted zip file
> I'm going to run a test to see if it finds a known password.
Okay, so that works, which means I can now work on getting together the
right combination of words to have a stab at the real thing. I have a nasty
suspicion that I may be back looking for help with mask mode at some point,
but thanks so much for your help magnum, I appreciate it.
Jasper
On Wed, 16 Sep 2020 at 06:47, Jasper Jones <jazjones9292@...il.com> wrote:
> I just tried running it on a short list of the most likely words to see if
> anything jumps out. Ran for ~5 mins and just got "session completed" at the
> end, which I assume means nothing was found.
>
> I got the following message when I started it:
> "Warning: detected hash type "ZIP", but the string is also recognised as
> "ZIP-opencl"
> Use the "--form=ZIP-opencl" option to force loading these as that type
> instead"
>
> Any issue with that?
>
> Then:
> "Using default input encoding: UTF8
> Loaded 1 password hash (ZIP, WinZip, [PKDF2-SHA1 128/128 AVX 4x1)"
>
> Does that look right? The reference to PKDF2-SHA1 instead of AES concerns
> me, but I appreciate that could just be my ignorance showing.
>
> I'm going to run a test to see if it finds a known password.
>
> Thanks again
> Jasper
>
> On Wed, 16 Sep 2020 at 06:26, Jasper Jones <jazjones9292@...il.com> wrote:
>
>> Thanks very much magnum. I was pretty stressed while doing this last
>> night and missed out the '>'before the file name when using zip2john. I now
>> have a txt file with what looks like a hash.
>>
>> That said, I'm still getting an error as well: "ver 5.1
>> wallet.zip/wallet.dat is not encrypted, or stored with non-handled
>> compression type".
>>
>> > It sounds like you got a proper hash (you need to redirect that screen
>> output to a file) and the warning you got later is probably from some
>> > other (not encrypted) file in the archive. Perhaps you accidentally
>> added a non-encrypted version to the archive? Try extracting it...
>>
>> There's definitely only a single file - wallet.dat - in the archive, so
>> this is a little puzzling. I'm not sure how adding a password with AES-256
>> encryption works - I assume encrypts just the file after compression?
>>
>> > What does "zipinfo <file>" or similar tool say? Or just "zip -l
>> <file>".
>>
>> I don't have zipinfo (I'm on Windows), but I could download a bootable
>> Linux distribution if that would help. 7zip itself gives some info about
>> the compressed file:
>>
>> - attributes: An
>> - Encrypted: +
>> - Method: AES-256 Deflate
>>
>> (There's some other stuff about file size, dates, etc, but assume it's
>> the encryption info that's needed?)
>>
>> Many thanks
>> Jasper
>>
>>
>>
>> On Tue, 15 Sep 2020 at 23:10, magnum <john.magnum@...hmail.com> wrote:
>>
>>> On 2020-09-15 19:43, Jasper Jones wrote:
>>> > 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.
>>>
>>> Try adding all such components, one on each line, to a short wordlist
>>> eg. "components.txt". Add punctuation and numbers (either simply digits
>>> 0 through 9 on separate lines, or/and longer numbers like 2020 if you
>>> know them) as well, on separate lines. Then use PRINCE mode.
>>>
>>> > 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".
>>>
>>> What does "zipinfo <file>" or similar tool say? Or just "zip -l <file>".
>>>
>>> It sounds like you got a proper hash (you need to redirect that screen
>>> output to a file) and the warning you got later is probably from some
>>> other (not encrypted) file in the archive. Perhaps you accidentally
>>> added a non-encrypted version to the archive? Try extracting it...
>>>
>>> > I wondered whether I needed to use the 7z2john.pl (a perl script?),
>>> given I
>>> > used 7-zip to generate the encrypted file?
>>>
>>> No, if it's zip format, zip2john is needed.
>>>
>>> zip2john archive.zip > hashfile.txt
>>> john hashfile.txt --prince=components.txt
>>>
>>> magnum
>>>
>>>
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