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OTF Brutus Password Pattern: Need Help 
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Joined: Thu, 2016/01/28 12:57 pm
Posts: 3
Unread post OTF Brutus Password Pattern: Need Help
Dear all,

i need help in recovering a pw with otf brutus (truecrypt).
The pw looks like:

AK49418?AK49418AK49418?
This means the string AK49418 is known,
but the string ? ist not known, and has a v a r i a b l e lenght from 1 to 3 digits,
but all ? strings are equal

So a "possible" pw would be
AK49418@pAK49418@pAK49418@p
or
AK49418@pHAK49418@pHAK49418@pH
or
AK49418dAK49418dAK49418d

How has the pw pattern to be defined in OTF Brutus GUI?

Best regards

Harald


Thu, 2016/01/28 1:06 pm
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Joined: Sun, 2005/04/03 7:02 pm
Posts: 302
Location: Los Angeles, CA USA
Unread post Re: OTF Brutus Password Pattern: Need Help
If the ? strings can be any characters then your password is too complex for OTFBrutusGUI to generate a password list on it's own that can be solved.

The pattern for the 95 printable ASCII characters is [ -~] (space dash tilde). If you want 1, 2 or 3 of those characters, the pattern is [ -~]{1-3}, which contains 866,495 possibilities and would take my computer, running 16 threads, about 50 minutes to solve. If your ? strings only contain letters, numbers and a few special characters, it might look like [a-zA-Z0-9@#$]{1-3} which only has 278,915 possibilities.

You want three sets of [ -~]{1-3}, which would be 650,576,217,356,237,408 possibilities. This would take my computer over 30 million years to solve.

You say that all three ? strings are the same. Unfortunately, I never built a way to handle that directly into OTFBrutusGUI. What you might be able to do, is use OTFBrutusGUI to save a word list using the pattern

Code:
AK49418[ -~]{1-3}
    or
[a-zA-Z0-9@#$]{1-3}
    or
something else


This will give you a text document with lots of possible passwords. You then might be able to edit the text file and convert each line from a single instance of the password item to three instances.

For example, the first three lines generated directly by OTFBrutusGUI from AK49418[ -~]{1-3} are

AK49418
AK49418!
AK49418"

You would need to edit each of those lines and change them to

AK49418 AK49418 AK49418
AK49418!AK49418!AK49418!
AK49418"AK49418"AK49418"

and save the password list, then load it back into OTFBrutusGUI.


Thu, 2016/01/28 1:40 pm
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Joined: Thu, 2016/01/28 12:57 pm
Posts: 3
Unread post Re: OTF Brutus Password Pattern: Need Help
Dear tateu,

tnx for your fast reply.

Do you see a possibility to directly implement this solution in the GUI?

It is as you wrote:
The ? strings only contain letters, numbers and a few special characters, so it is "easier" for a brute force attack...

I think the other mentioned solution is not doable (for me).

best regards
Harald


Thu, 2016/01/28 1:55 pm
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Joined: Sun, 2005/04/03 7:02 pm
Posts: 302
Location: Los Angeles, CA USA
Unread post Re: OTF Brutus Password Pattern: Need Help
No, I have no plans to implement this. I think it's been almost 3 years since I did any work on OTFBrutusGUI.

To modify the file you could use a typical linux command line program called sed. You can find a command line version for Windows from here: http://gnuwin32.sourceforge.net/packages/sed.htm. From the download section, you need either

Complete package, except sources setup

or

zip file
and dependencies

Code:
1) Enter your pattern AK49418[a-zA-Z0-9@#$]{1-3} in OTFBrutusGUI. Save a word list to a file, list.txt.
2) Open a command prompt and run
    sed "s/\(.*\)/\1\1\1/g" list.txt >newList.txt
3) Load newList.txt as a word list dictinary into OTFBrutusGUI.


Thu, 2016/01/28 2:30 pm
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Joined: Thu, 2016/01/28 12:57 pm
Posts: 3
Unread post Re: OTF Brutus Password Pattern: Need Help
Dear Tateu,

thanks a lot for your fast and very helpful response!
I will check it out soon.

Best regards
Harald


Fri, 2016/01/29 8:25 am
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Joined: Fri, 2016/10/28 2:37 am
Posts: 1
Unread post Re: OTF Brutus Password Pattern: Need Help
badkeitten wrote:
Dear Tateu,

thanks a lot for your fast and very helpful response about the bathmate pump!
I will check it out soon.

Best regards
Harald


Thanks Harald.


Sat, 2016/10/29 1:21 am
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