Date: Fri, 11 Nov 2011 21:46:23 -0500 From: Philippe Ouellet <pplouellet@...il.com> To: "john-users@...ts.openwall.com" <john-users@...ts.openwall.com> Subject: Re: NTLM challenge/response cracking (again...) I've had issues with captured challenge response hashes. Here is some additional info that helped me with formatting. http://www.foofus.net/?page_id=63 On 2011-11-11, at 5:16 PM, rootkit rootkit <rootkit77@...il.com> wrote: > On Fri, Nov 11, 2011 at 6:29 PM, magnum <john.magnum@...hmail.com> wrote: > >>> Information on this topic are very difficult to find. At the beginning >>> I was thinking about generating rainbow tables for each different >>> CHALLENGE, but that would be really too much. >> >> It would miss the whole point of rainbow tables. In short, if you do not >> already have the tables, cracking with JtR will be quicker. > > True. At the time I didn't know john could crack it (or better, I > didn't know I needed the jumbo patch). > >>> However there's something I don't understand: does the NETLM cracking >>> work only if the challenge is 1122334455667788? Would it work for any >>> challenge? >> >> JtR works for any challenge. That particular challenge stems from some >> old public attacks where the challenge was forced to this value, thereby >> making the salt (challenge) "worthless". > > That was more or less my guess, thanks for confirming. > >> And, because of this, I'm >> pretty sure there are rainbow tables for that very challenge. > > Yes, I have seen some around. > >> Like Solar said, post some example hashes. It should work if you do it >> right - at least if you run JtR version 1.7.7-jumbo-5 or newer. Earlier >> versions had a variety of shortcomings and was also substantially slower >> for these hashes. > > Done in the other post. > Thanks for your answer magnum.
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