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 Forum index » Archive » Archive: The Haunted Apiary (Let Op!) » The Haunted Apiary (Let Op!): Puzzles
[Puzzle] Audio Files hiding steganography
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

[Puzzle] Audio Files hiding steganography

I've been trying to find hidden steg in the individual audio files and couldn't do it.


If the files have something hidden in them it produces a raw PCM file audio and a text file. I couldn't get anything to happen until I used the combined audio clips.

I have successfully decryped the first story(Jersey.mp3) using the passphrase:
dizzyescapejerseyreflecteddurga

It produces the attached jersey.txt file. Can't figure out what this file is supposed to be. Doesn't neccesarily have to be a txt. Could be an image rename or some audio. I'm just not crafty enough to figure it out. So take a crack at it.

Also haven't been able to decode the other 3 mp3s.

Good luck making it work and figuring this out. My girlfriend will kill me if I spend another second on this tonight.

the steg program i use is here:

http://www.cl.cam.ac.uk/~fapp2/steganography/mp3stego/


used this command to decrypt:

decode -X -A -P dizzyescapejerseyreflecteddurga jersey.mp3 jersey.pcm jersey.txt

PostPosted: Wed Aug 25, 2004 9:29 pm
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persimmon8
Boot


Joined: 24 Aug 2004
Posts: 14

steno in mp3s

By the time the .wavs have been re-encoded into .mp3s, any possible steno is gone. Really.

Have you tried concatenating the *original* (not resampled) .wavs and looking for steno there?

- Per

PostPosted: Wed Aug 25, 2004 9:48 pm
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inio
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Joined: 24 Jul 2004
Posts: 163
Location: Santa Cruz, CA

Re: [Puzzle] Audio Files hiding steganography

pjv2 wrote:
I have successfully decryped the first story(Jersey.mp3)


Meaningless. As the file was re-encoded, anything hidden in the original is gone. If there is a message there it was hidden by whoever created the mp3 file, not a PM.

persimmon8 wrote:
any possible steno is gone.


well, that doesn't really matter. I've never seen an MP3 that could type well or write shorthand.
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PostPosted: Wed Aug 25, 2004 11:13 pm
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

If you look at these files it is clear to see that the originals are encoded as mp3s and saved with a wav extension. If you didn't uncompress them when combining them it wouldn't effect the stenography. I took the files from here:

http://maxdamage.justblank.net/beewavs.htm

unless maxdamage is messing with us then I think it's authentic.

Since last night I have been able to also find steg in kamal's story using passcode:
parasiteseyesbeerfour_goatsour_hoodlumsmuch_liftingmeditapeyou_couldsay_somethingguiltymessage_savedtunahi_aiden
Last night i had pillow in the kamals monolog(sourced from the bruce), I realized my mistake today and fixed it.


I still haven't gotten jan's to story work using passcode:
blippillowwalkaway_girlhey_soldierpqistupid_copyes_or_nohey_dadnervouslaw_abidingyou_knew

Maybe emergency needs to be combined into jans story for this to work on it as emergency yields no files either.

EDIT: Just realized the jan file had emergency in it already maybe i need one with emergency pulled out. does anyone have a version like this?

Can some one please verify this independant of me as a find it hard to believe this is coincedence.[/i]

PostPosted: Thu Aug 26, 2004 8:18 am
Last edited by pjv2 on Thu Aug 26, 2004 8:30 am; edited 1 time in total
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Max Damage
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Joined: 24 Jul 2004
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pjv2 wrote:
If you look at these files it is clear to see that the originals are encoded as mp3s and saved with a wav extension. If you didn't uncompress them when combining them it wouldn't effect the stenography. I took the files from here:

http://maxdamage.justblank.net/beewavs.htm

unless maxdamage is messing with us then I think it's authentic.


The only changes I made was to delete the areas of 'dead air' at the start/end of each segment. Aside from that, I just clipped them together like a jigsaw puzzle - and there's only one way to fit each segment into the next when they're part of the same 'scene', so I know they're in the right order.. Simple as that. Opened as a 56kbps, 24hz .wav file, saved in exactly the same format.

So yeah - it's about as authentic as you're going to get.

PostPosted: Thu Aug 26, 2004 8:29 am
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

max thanks for anwering back so quick. Damn you fast.

Do you have a jan story without emergency on the end of it?

PostPosted: Thu Aug 26, 2004 8:32 am
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Max Damage
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Joined: 24 Jul 2004
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pjv2 wrote:
max thanks for anwering back so quick. Damn you fast.

Do you have a jan story without emergency on the end of it?


Lemme do you up one of them in a minute. Although I'm pretty sure that Emergency fits in, given that..

A: They just left the police station.
B: The police have DNA and other samples from Jan as well as the PQI results, and info on her father.
C: Her father warns that people that she doesn't even know yet may get hurt from getting into that kind of trouble, and that he'll 'take care of it'. Not only that, but she very nervously asks 'Is something bad going to happen?' and when he says 'Don't worry, I'll take care of it', she asks (even more nervously) 'How' - as if she expects something really bad.. like, say, a major fire to happen.

Shortly later, the police station holding all the data on them mysteriously burns to the ground, and for some reason the fire sensors didn't pick it up - it was just left to burn.

It fits perfectly in with the narrative, even though some people may disagree.

PostPosted: Thu Aug 26, 2004 8:38 am
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

I agree that it fits in with the jan narrative. The only reason to disinclude it would be the rewind sounds at the beginning and end maybe signifying that it is an independant file.

I hope people know that I'm being authentic here and not screwing around. The files won't even complete the decrypt if there is none in there so this definitely isn't random noise.

One file could be a coincedance but with two there's no way.

Again urging someone to independantly verify so I don't seem like one lone nut

PostPosted: Thu Aug 26, 2004 8:43 am
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Max Damage
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Page updated, as per request, complete with link to the mirror, for those willing to show a little mercy for me.

PostPosted: Thu Aug 26, 2004 8:49 am
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

Thanks maxdamage. Tried the new file still didn't work...

Speaking of work I better go hopefully someone figures this out while I'm there.

PostPosted: Thu Aug 26, 2004 9:22 am
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SuperJerms
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Joined: 21 Aug 2004
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The txt flie does not look like a picture (or any other raw data from a useful file I've ever seen before).

I find it curious that the passcode is the filename...how do you know that you aren't just picking up some sort of header information? Also, why work with compiled info...why not work with the original wavs from ilb? Just go to the fun stuff page and download each file for yourself.

If there is steg in the files, it should be there without the files being joined.
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PostPosted: Thu Aug 26, 2004 11:19 am
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

I tried combining all the audio files myself for jersey.mp3 and I comeup with a file that is 1.23 seconds longer than max's and the steg no longer works. my file is an unedited file of 30.73 seconds max's is 29.50.

Also tried all the individual files with just there names as the password and all the individual files with the combined names as passwords. none of these works.

I further tried rearranging the words and decoding the file that I've successfully decoded before just in case it was some quirk with password length. This also failed. It's just to large of a coincedance for me to ignore.

Perhaps I'm just two dense for my own good.

PostPosted: Thu Aug 26, 2004 11:45 am
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sherpa
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Joined: 10 Aug 2004
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SuperJerms wrote:
Also, why work with compiled info...why not work with the original wavs from ilb?


The OP says he/she tried the individual wavs first and could only get info from the combined ones. it does seem a bit coincidental though.

I'll see if I can talk to someone in the lab about it (the program posted by the OP was designed in my lab, so I should be able to!).
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PostPosted: Thu Aug 26, 2004 11:47 am
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pjv2
Boot

Joined: 25 Aug 2004
Posts: 53
Location: Chicago

sherpa wrote:
(the program posted by the OP was designed in my lab, so I should be able to!).


That would be great. If they say it could be a coincedance I can stop obsessing

PostPosted: Thu Aug 26, 2004 12:00 pm
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sherpa
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Okay, just so you have some reassurance, I just tried the same experiment on both combined and individual files, with various passphrases and without passphrases. The only thing that worked at all was the combined ones, with combined names as passphrases. I'm working on checking out how coincidental that may be.
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PostPosted: Thu Aug 26, 2004 12:50 pm
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