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Date: Mon, 6 Dec 2010 13:03:06 +0300
From: Solar Designer <solar@...nwall.com>
To: john-users@...ts.openwall.com
Subject: Re: pwgen
Rich, Brad, Minga, all -
On Thu, Dec 02, 2010 at 03:07:28PM -0500, Rich Rumble wrote:
> Just using JtR's incremental mode I've cracked 55 of the 1000 in the last 72hrs
> (2.33Ghz Intel DuoCore)
> guesses: 55 time: 3:00:04:15 (3) c/s: 7546M trying: Gkuz6v2o - Gkuz6vb$
> I set my conf to 8 min/max since I knew the length already, these were again
> the passes provided by Brad and converted to NTLM by me.
I assume you were using all.chr supplied with JtR?
I ran my pwgen.chr (generated from 1 million pwgen passwords) against
your output.zip, which in turn was based on Brad's 1000 pwgen passwords
(I trust you on this; I did not verify). I got over 500 passwords (that
is, over 50%) cracked in less than 2 days:
guesses: 5 time: 0:00:00:01 c/s: 20671M trying: uo1Eate6 - uo1Eat2u
guesses: 14 time: 0:00:00:06 c/s: 11706M trying: Aiwuo2ol - Aiwuo2if
guesses: 25 time: 0:00:00:20 c/s: 13386M trying: Eo8aNei7 - Eo8aNea6
guesses: 35 time: 0:00:00:43 c/s: 13220M trying: un1Ame9O - un1Amo6y
guesses: 45 time: 0:00:01:00 c/s: 13789M trying: Ii3ula7o - Ii3ula2U
guesses: 51 time: 0:00:01:15 c/s: 13995M trying: At0S8ci6 - At0S8c6b
guesses: 57 time: 0:00:01:47 c/s: 13444M trying: iut3T1c4 - iut3T1C4
guesses: 57 time: 0:00:02:04 c/s: 13345M trying: os9D9bu1 - os9D9b8E
guesses: 511 time: 1:23:51:03 c/s: 8839M trying: Ge4SeVsU - Ge4SeVck
guesses: 523 time: 2:05:43:11 c/s: 8700M trying: qpm9Ms6i - qpm9Ms6t
It's also curious how 5 passwords (0.5% of total) get cracked in 1 second.
45 (4.5% of total) get cracked in 1 minute.
This matches my own results pretty well. So there's nothing special
about my copy of pwgen and my system. The attack also works against
passwords pwgen'ed on Brad's system.
Meanwhile, my longer run against 1000 pwgen'ed passwords generated on my
system got all the way to 832 cracked (83.2%):
guesses: 391 time: 0:20:27:48 c/s: 10216M trying: TeydCgP9 - TeydCgOr
guesses: 471 time: 1:16:24:19 c/s: 9484M trying: uhtNSTh8 - uhtNSTao
guesses: 552 time: 3:00:48:08 c/s: 8601M trying: MD6SozoT - MD6SozeY
guesses: 594 time: 3:21:44:05 c/s: 8176M trying: ExiR1EFx - ExiR1IWw
guesses: 642 time: 5:05:17:10 c/s: 7628M trying: SX7HeTyO - SX7HeTxt
guesses: 680 time: 6:08:10:30 c/s: 7206M trying: xeSzpAnA - xeSzpAkx
guesses: 708 time: 7:13:50:30 c/s: 6814M trying: ea9R4X3Z - ea9R4X8p
guesses: 764 time: 9:18:59:57 c/s: 6195M trying: qcgAejq3 - qcgAejqG
guesses: 796 time: 11:05:45:41 c/s: 5841M trying: ef9LOeSN - ef9LOaxN
guesses: 826 time: 13:05:38:12 c/s: 5396M trying: CmTNhRk1 - CmTNhRkX
guesses: 832 time: 13:11:31:16 c/s: 5349M trying: ce7r5XIn - ce7r5XIP
Alexander
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