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  #1  
Old 02-15-2013, 03:36 AM
Niruzi Niruzi is offline
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Default Truecrypt bruteforce attack,forgotten password

Hi together,

ive got a truecrypt file (create myself) and forget my password. .... yes i do not remember it !!... that is the problem when you change password and do not remember it again... The problem is my password is about 6 or 7 words and numbers. Every "singel" word or number i know (i think so) . But not the order of words.
My question is now which bruteforce tool i can use to find my lost password ?

The tools i use are :

Truecrypt 7.1a (it is a hidden file)
TCbrute 2.3.4691.22681 for bruteforce
Combinator_v1.0 for creat wordlist

First i test it with a simpel password on a truecrypt file. (create new tc file for testing with a simpel pw) but it wont work. so i think the TC7.1a and my bruteforce tool are not compatible.
Have someone a good idea which bruteforce tool works fine with TC7.1a

Thanks from Niruzi
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  #2  
Old 02-22-2013, 11:50 AM
Aimless Aimless is offline
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Default As Above

Try this:

http://www.elcomsoft.com/efdd.html

Have Phun
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  #3  
Old 02-22-2013, 12:57 PM
Git Git is offline
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Default

Actually, it should be fairly easy to do a brute force attack by hand if you know the actual words. Think about it, there are not that many combinations. Say you had 3 words A, B and C. You only have to try :

A B C
A C B
B A C
B C A
C A B
C B A

I can't rember much math at my age, but I think if you have N words then you have N Factorial (N!) combinations to try. 6 words is 720 combinations and 7 words is 5040. You should easily be able to set up a batch file to try each in turn. Use something like Excel to create the table.

Git
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  #4  
Old 02-23-2013, 01:37 PM
Aimless Aimless is offline
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Default As Above

Note, however, that each word can possibly be REPEATED in a password:

So, you can also have:

AAA
BBB
CCC
AAB
AAC
...

too large.

Also, there are 26 alphabets, and 10 numbers (0-9). And then, if it's CASE SENSITIVE, then you have 26+26 = 52 alphabets.

Just saying...

Not THAT easy.

And if the programmer is smart, he will have put in a TIME LOOP for a validation. Each validation of the password by the program takes around, say, 5 seconds. Nothing big if you enter the password correct or wrong once or twice.

Nightmare, if you are trying to brute force it.

Now, DEFINITELY not that easy.

Peace.

Have Phun
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Last edited by Aimless : 02-23-2013 at 01:40 PM.
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  #5  
Old 02-23-2013, 06:13 PM
Git Git is offline
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26 alphabets?. 0 to 9??. Not sure what you mean, but you said you KNEW the WORDS, in which case it is a simple permutation. Where do letters and numbers and alphabets come into it?. It makes no difference if a word is repeated or no, just count it as 2 words and the problem is the same.

Either you are overcomplicating it now, or you under-complicated it when you explained the problem.

A B C
A C B
B A C
B C A
C A B
C B A

B = C = A ?. So what, it's the same problem. Just ignore the similarity.

Git
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