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Date: Sun, 11 Dec 2016 14:12:15 -0500
From: Robert Moskowitz <>
Subject: Re: Need a little help cracking one password

On 12/11/2016 03:47 AM, Patrick Proniewski wrote:
> Hi,
> On 11 déc. 2016, at 06:43, Robert Moskowitz wrote:
>> It just so happens that I used the same password on another server, and created a passwd file with the one entry.  I am running the John that comes with Fedora 22, the docs cay it is 1.10 2013/05/29.
> I'm not sure this 1.10 version of JtR exists. It probably should be 1.8.x.

I checked dnf.log and it reports john-1.8.0-4.f22

My f24 has john-1.6.0-6.f24

> 2013 sounds a bit old, you might want to install a more current version, and even to compile a Jumbo version.

Then I would have to look up how to do a build.  It has been a couple 
years since I did my last one.  :(

>> John has been crunching away for 20 days on a Lenovo x120e notebook without finding the password.  Well I know a few things about this password and I would like to instruct John o be selective on what it tries.  But I am a bit of a hack and need so hand-holding on how to alter /etc/john.conf (or make another) that will target the password.
>> I know the password is 10 characters long.
>> I know that the first position is either 'x' or 'X'.
>> The second is a digit, as is the third.
>> The forth is alpha, and I don't know the case.
>> The fifth is either 'q' or 'Q'
>> and soforth (either digit, some alpha, or a specific alpha of either case)
> With a recent Jumbo version, you can use --mask attack mode:
> ./john -1=[?u?l?d] --mask=[xX]?d?d?[a-zA-Z][qQ]?1?1?1?1?1 /path/to/passwdfile
> (I'm not sure for the non-Jumbo version, but it might work too).

--mask is not an valid option on either my F22 or my F24 system.

Same with -l

That is why I was looking at the config file and how to specify in it a 
specific password format.


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