Date: Mon, 17 Dec 2012 12:54:00 -0600 From: Raleigh Rinehart <rrinehart@...-estech.com> To: john-users@...ts.openwall.com Subject: new user help with list vs. incremental modes Hi All, I am new to JtR and am trying to test things out. To that end, I've downloaded and installed JtR to my Mac box (happens to be the most powerful machine currently available). Here is the version I am running: John the Ripper password cracker, ver: 1.7.9-jumbo-7 [macosx-x86-64-gpu] My question is this: how do I best configure JtR to run for a known password pattern? For example, if I know ahead of time the password is going to be of the form 3-6 alpha-numerical characters followed by 3-8 digits? I've gone through the documents, mailing lists and other resources but am still confused on the best approach attack to this. Here is what I've done so far. I tried creating a "digits_list.txt" file by running: john --incremental=digits --stdout=8 > digits_list.txt Then I created a new List rule like this: [List.Rules:Foo] A0"[0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z]" A0"[0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z]" A0"[0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z]" A0"[0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z][0-9a-zA-Z]" When I run that with: ./john --format=raw-sha512-cuda --device=1 --session:foo --wordlist=digits_list.txt -rules:Foo crackme.txt JtR just seems to do nothing. I let it run for a couple of hours but it never seemed to do anything. Running the status command returns this: ./john --status=foo fopen: foo.rec: No such file or directory And I don't see any log files get created either (i.e. foo.log) I am guessing it is because the digits_list.txt is too big (~950meg) or the way I've tried setting up the mangling is too inefficient. So my next idea is to try and use 'incremental' mode. However I am at a loss as to how to configure that to run for a password pattern like the above. Any ideas, pointers or insights would be greatly appreciated! thanks, -raleigh
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