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+--- Thread: Strange problem with wpa2 hash breaking (/thread-1147.html)
Strange problem with wpa2 hash breaking - DrGeek - 05-06-2012
Hi I am using oclhashcat to break my wpa2 hash but am facing a strange problem.i have captured the handshake of my router and was trying to break it but it is giving me strange results.i have made a random wordlist and placed the password in it but oclhashcatplus cracks it only when it is placed between the first line and the twentyseventh line.when it is placed below the twentyseventh line it fails to crack it and shows exhausted.why is it behaving like this?
My setup is
Win XP sp3
ATI Radeon 5670 w ati catalyst 12.1 w opencl 858.1
Password length is 14 chars
Oclhashcatplus 0.08
RE: Strange problem with wpa2 hash breaking - atom - 05-07-2012
oclHashcat-plus v0.08 requires catalyst 12.4
RE: Strange problem with wpa2 hash breaking - DrGeek - 05-07-2012
same result with 0.08 w win 7, catalyst 12.4
0.07 works fine though on xp w catalyst 12.1,win7 w catalyst 12.3,12.4 both
i have attached a screenshot of the output from different versions with same setup and the same wordlist
what's with the 27th line
RE: Strange problem with wpa2 hash breaking - atom - 05-07-2012
Send me the .hccap and the dictionary and the plain in PM so I can reproduce
RE: Strange problem with wpa2 hash breaking - atom - 05-07-2012
*UPDATE*
I found a problem in AMD NON-GCN architecture WPA/WPA2 kernel. Could you please try to with this hotfix kernels? Just overwrite the files. If it works for you I will announce it as hotfix.
http://hashcat.net/files/oclHashcat-plus-0.081.7z
RE: Strange problem with wpa2 hash breaking - DrGeek - 05-07-2012
(05-07-2012, 06:25 PM)atom Wrote: *UPDATE*
I found a problem in AMD NON-GCN architecture WPA/WPA2 kernel. Could you please try to with this hotfix kernels? Just overwrite the files. If it works for you I will announce it as hotfix.
http://hashcat.net/files/oclHashcat-plus-0.081.7z
This kernel works even on xp and catalyst 12.1.
[EDIT]
on windows 7 with catalyst 12.4 this new kernel gives a new problem but not exactly same. on windows 7 every second 14 char pwd is not checked ie.if you create a wordlist of only 14 char words and place the pwd at even line nos it won't be checked.
same problem on XP too
What is the line ending you use for wordlists for use with hashcat - linux or dos
I have used dos line endings
RE: Strange problem with wpa2 hash breaking - atom - 05-07-2012
Excellent findings. Your notes were very helpful finding the bug! Much thanks! If you want you can participate as official beta tester. Send me a PM and I will setupt the credentials.
I've uploaded a new version to the same url as before: http://hashcat.net/files/oclHashcat-plus-0.081.7z
Would you please try again?
RE: Strange problem with wpa2 hash breaking - DrGeek - 05-08-2012
it works.
confirmed on WinXP SP3 ,catalyst 12.1
Win7 , Catalyst 12.4
thanks for sorting it out quickly.keep up the good work
still i would like to try it with other pwd lengths.can you suggest where i can get different handshakes with plaintext pwd? is there any way to generate the handshake for a given pwd other than capturing it off the air?
can other users who are viewing this thread send their hccap files along with plaintext in PM to me?
RE: Strange problem with wpa2 hash breaking - atom - 05-08-2012
OK, thanks. Thread closed.