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arthurdent11389
Decorated

Joined: 01 Oct 2010
Posts: 184

 		maybe you have part of password correct... I suggest trying "bugporn", and then other "bu________" words.

nice work so far, though Smile

PostPosted: Tue Apr 08, 2014 1:14 pm
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Jasper_
Greenhorn

Joined: 08 Apr 2014
Posts: 4

 		That means that the unarchiving tool you're using has a bug. I don't get that, though:

Code:

$ ./unar.exe -f -p bugmars stinky.arj
stinky.arj: ARJ
  stinky.mp4  (1239830 B)... Failed! (Unknown error)
Archive parsing failed! (Data is corrupted.)
Extraction to current directory failed! (1 file failed.)


Where did you get your build of unar? I'm using the Windows copy over here: http://unarchiver.c3.cx/commandline

PostPosted: Tue Apr 08, 2014 1:54 pm
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Friedlemar
Boot

Joined: 17 Mar 2014
Posts: 13
Jasper_ wrote:

Where did you get your build of unar? I'm using the Windows copy over here: http://unarchiver.c3.cx/commandline


I'm using a Unix version (1.8, installed on Mac via Homebrew). I also checked it with the ARJ32 executable on Windows, and I get the same normal failure that you do.

What a tantalizing bug with the unar software! I guess we're back to square one.

PostPosted: Tue Apr 08, 2014 3:18 pm
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p1start
Greenhorn

Joined: 14 Mar 2014
Posts: 7

 		Hmm. My build doesn't segfault with "bugmars", but when I was brute-forcing it I found a few other strings:
Code:
unar -f -p oyjyz stinky.arj
outputs
Code:
stinky.arj: ARJ
  stinky.mp4  (1235637 B)... Segmentation fault


I've also found that some other strings have yet another output: using "bb" (no quotes) as the password I get the following error message:
Code:
stinky.arj: ARJ
  stinky.mp4  (1235637 B)... unar: Uncaught exception NSInvalidArgumentException, reason: Prefix found


I'm using unar version 1.2-2build1 on Linux (Ubuntu 13.04), installed through apt-get. This must be a very buggy piece of software!

PostPosted: Tue Apr 08, 2014 3:28 pm
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MD1500
Boot


Joined: 04 Nov 2006
Posts: 52
Location: England

 		Of course, it COULD be that files are corrupted and thats why we can't extract it, but I somehow doubt it.

PostPosted: Tue Apr 08, 2014 4:04 pm
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Jasper_
Greenhorn

Joined: 08 Apr 2014
Posts: 4

 		It's entirely possible. I don't have access to my Linux machine right now, but I'll see if I can figure out where unar is segfaulting. Maybe that would be a clue.

It would be disappointing if we couldn't make progress because the disks were unreadable.

PostPosted: Tue Apr 08, 2014 4:11 pm
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Friedlemar
Boot

Joined: 17 Mar 2014
Posts: 13
MD1500 wrote:
Of course, it COULD be that files are corrupted and thats why we can't extract it, but I somehow doubt it.


Remember that we got identical copies of these files off of distinct disks (except the two I couldn't read). So it seems pretty likely that the data provided is the data that we were intended to get.

PostPosted: Tue Apr 08, 2014 6:17 pm
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aklreaxmer
Veteran


Joined: 25 Sep 2013
Posts: 78

 		I'm not getting these errors using ARJ32 for Windows, but I did do some research on the ARJ format; this is a multi-volume archive, so you need to specify that in the command.
For ARJ32:
Code:

arj32 x -v -y -g? stinky.arj


This starts with stinky.arj and finds all subsequent ".a##" files

PostPosted: Tue Apr 08, 2014 9:21 pm
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clickbecause
Greenhorn

Joined: 09 Apr 2014
Posts: 7

 		Re: EXIF Data
dvorak42 wrote:
Interestingly, all the images have EXIF Descriptions that seem relevant:


02.jpg: x"83968686858540A689A3884081409781A340968640
04.jpg: 82A4A3A385996B409694859385A340A689A388408388
06.jpg: 8585A285408195844082818396956B408881A2884082
10.jpg: 9996A695A26B40A39681A2A340A689A3884082A4A3A3
12.jpg: 85994081958440A2A381A682859999A840918194"

Converting it to psuedo-base-8, you get:

Quote:
COFFEE WITH A PAT OF BUTTER; OMELET WITH CHEESE AND BACON; HASH BROWNS; TOAST WITH BUTTER AND STAWBERRY JAM


The translation is done by taking two characters at a time, XY, using 'A" as 10 and 'B' as 11. You then take 8*X+Y and convert that to an ASCII character. However, if X is above 8, you instead use 8*X+Y+1.


I know next to nothing about encryption/cryptology, but I found the above text super intriguing.

If you isolate each breakfast-oriented sentence fragment and strip the articles (a, an, the, etc) you end up with a series of short strings of letters. Abbreviations maybe?

CPB; OCB; HB; TBSJ

CPB could refer to cycles per byte, commonly used as an indicator of performance in cryptographic functions (according to Wikipedia).

OCB could refer to OCB mode, a mode of operation for cryptographic block ciphers (again, according to Wikipedia).

No idea on the other two. Maybe HASHBROWNS is pointing towards cryptographic hash functions?

Might be totally off base, but I find it interesting considering the ARJ format uses current clock count in some way to initially encrypt the file (as far as I understand it).

Hopefully this helps... somehow.

PostPosted: Wed Apr 09, 2014 4:19 pm
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fishnchips
Greenhorn

Joined: 09 Apr 2014
Posts: 4

 		Re: EXIF Data
dvorak42 wrote:
Interestingly, all the images have EXIF Descriptions that seem relevant:


02.jpg: x"83968686858540A689A3884081409781A340968640
04.jpg: 82A4A3A385996B409694859385A340A689A388408388
06.jpg: 8585A285408195844082818396956B408881A2884082
10.jpg: 9996A695A26B40A39681A2A340A689A3884082A4A3A3
12.jpg: 85994081958440A2A381A682859999A840918194"

Converting it to psuedo-base-8, you get:

Quote:
COFFEE WITH A PAT OF BUTTER; OMELET WITH CHEESE AND BACON; HASH BROWNS; TOAST WITH BUTTER AND STAWBERRY JAM


The translation is done by taking two characters at a time, XY, using 'A" as 10 and 'B' as 11. You then take 8*X+Y and convert that to an ASCII character. However, if X is above 8, you instead use 8*X+Y+1.


Small thing, but is the conversion a copy and paste or was it retyped? Because I just noticed it gives STAWBERRY instead of STRAWBERRY.

PostPosted: Wed Apr 09, 2014 6:55 pm
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roseModerator
...and then Magic happens


Joined: 26 Nov 2003
Posts: 4117

 		This project has been funded as of today. He raised over $72,000 well over what the $60,000 he was seeking.
_________________
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PostPosted: Wed Apr 09, 2014 7:03 pm
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clickbecause
Greenhorn

Joined: 09 Apr 2014
Posts: 7

 		Re: EXIF Data
fishnchips wrote:

Small thing, but is the conversion a copy and paste or was it retyped? Because I just noticed it gives STAWBERRY instead of STRAWBERRY.


Good call!

I just used the method that dvorak provided to double check the numbers provided by the bugporn jpegs and the 'R' in 'STAWBERRY' is indeed missing. So, its NOT a typo. I pulled the numbers directly from the image descriptions.

Could be something! 'R' as in 'Rosencrantz,' maybe?

The number that represents 'R' in the image descriptions is 99.
And the decimal value for the ascii value 'R' is 82.

Might come in handy!

PostPosted: Wed Apr 09, 2014 9:35 pm
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fishnchips
Greenhorn

Joined: 09 Apr 2014
Posts: 4

 		Reversed Humming
I'm not entirely sure if the humming audio clip has been "used" yet, but I simply took it and reversed it, and it sounds like it has a little more musicality than it had before.
kernaloftruth_humming_reverse.wav
 Description   kernaloftruth_humming audio clip reversed
 Filesize   448.77KB
    98 Time(s)

Unfortunately, this file is no longer in our archives.

PostPosted: Wed Apr 09, 2014 10:23 pm
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bnm12
Greenhorn

Joined: 08 Apr 2014
Posts: 4

 		Bruteforcing stinky.arj
So I couldn't make any sense of the information we have at our disposal right now, so I figured that the best I could do was to try to bruteforce the stinky.arj file.

I have started a bruteforce script running from 1-20 length passwords (Won't realistically reach the end anytime soon) trying all passwords from the charset a-zA-Z0-9 (all lowercase letters, all uppercase letters, and all numbers)

So don't bother trying any passwords with less than 6 chars if it doesn't contain a special char (or a space)

I'll post updates as the bruteforce progresses
Current progress: all 7 char passwords

So apparently the program I used crashes around the beginning of the 7 char passwords, I'll return when I have a new method figured out...

Ok I found a new way, this seems to be more stable...

PostPosted: Thu Apr 10, 2014 3:22 am
Last edited by bnm12 on Mon Apr 14, 2014 3:40 am; edited 1 time in total
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clickbecause
Greenhorn

Joined: 09 Apr 2014
Posts: 7

 		I can't help but notice that Rosencrantz ends in "antz"

As in, y'know, bugs.

PostPosted: Thu Apr 10, 2014 2:04 pm
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