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+--- Thread: Strange possible bug with IPB -m 2811 (/thread-1583.html)
Strange possible bug with IPB -m 2811 - blandyuk - 09-21-2012
First, in this mode, it seems to ignore the increment option. I have the below which clearly states to start from len 6 but it starts from len 1:
oclHashcat-plus64.exe -m 2811 -a 3 -n 320 --gpu-temp-disable --remove -o found2811.txt -i --increment-min=6 hashes2811.txt ?d?d?d?d?d?d?d?d?d?d
Also, when it did get to len 6, it was running @ 326.6M c/s so I would assume when it got to len 7, it would be a bit faster but it's totally stalled at 36719.2k c/s. Been running 15 / 40 mins and no change.
I'm cracking a few 1000 IPB hashes so use the below hashes in here to try and replicate:
http://forum.insidepro.com/viewtopic.php?t=16717
Cheers atom
RE: Strange possible bug with IPB -m 2811 - blandyuk - 09-21-2012
Another update on this, when I use rules, it's runs at 1736.6k c/s
RE: Strange possible bug with IPB -m 2811 - blandyuk - 09-21-2012
Ah I got it, removing -n 320 fixed the issue. Not sure what was going on there.
RE: Strange possible bug with IPB -m 2811 - M@LIK - 09-21-2012
Confirming the ignoring of --increment-min when using -i.
We have to create masks like before:
Code:
?1
?1?1
?1?1?1
?1?1?1?1RE: Strange possible bug with IPB -m 2811 - atom - 09-21-2012
I doubt its a bug. Its possible that its just to fast, so you dont see first ?1 x 4.
RE: Strange possible bug with IPB -m 2811 - blandyuk - 09-21-2012
No, when I set -i --increment-min=6 with mask ?d?d?d?d?d?d?d?d?d?d, it starts a ?d as u can see it in the statuses.
Also, why is len 6 ?d faster than len 7 ?d
???
RE: Strange possible bug with IPB -m 2811 - atom - 09-22-2012
Because of how BF works, splits are required. They are done automatically by oclHashcat-plus (original oclHashcat did not if you remember left-right thing) and if you choose a small charset these calculations can be wrong so thats why its possible that len 6 ?d is faster than len 7 ?d.
RE: Strange possible bug with IPB -m 2811 - blandyuk - 09-25-2012
Coming back to this one, been trying Combinator attacks using fingerprinting. Used the expander to generate all possibilities, about 1450000 and then tried to do a Combinator attack on the 7000 IPB hashes, speed was about 3000k c/s, normally just over 3100M c/s.
Tested this attack on normal MD5 hashes and it worked ok.
I think there is a definite speed issue with IPB mode. Tested with 10, 500, 2000 and 7000 hashes and salts, all the same.