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Message-ID: <20210105231149.GA18558@openwall.com>
Date: Wed, 6 Jan 2021 00:11:49 +0100
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: Cracking rar password with rar-opencl
On Tue, Jan 05, 2021 at 11:15:12PM +0100, Anton Berggren wrote:
> Attaching screenshot from GPU-Z for some better GPU information/data
Screenshots are discouraged here, but yours does show that your GPU
utilization is changing from none to full and back. Two sessions
(running different attacks) or one session with "--fork=2" might help.
Once again, most importantly you need to focus the search on candidate
passwords that are actually likely given what you recall about the RAR
archive password. That said, if you haven't done so yet, I suggest that
you start with the RockYou list, which will complete (given the speeds
you posted) perhaps in 2 hours:
https://wiki.skullsecurity.org/Passwords
(Given that RAR password cracking is so sensitive to password lengths,
sorting/grouping the wordlist by length would likely improve speeds, but
I guess is tricky for you to do. This may be more of a reminder for us
to add this as a built-in feature for more JtR formats that need it.)
Alexander
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