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flat assembler > Projects and Ideas > Steganography program [DONE]

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ATV



Joined: 31 Aug 2004
Posts: 109
Location: Finland
This is my old DOS program that can hide files inside picture.

WARnING: IF YOU ARE SCARED TO USE COMMAND liNE PaRametErs, Go AwAy, thIS is pUre DOS pROgrAM AND UsES OnLy coMMaND lInE Parameters.

That 54k stega.gif has full zipped (15k) FASM source inside. Read stega.txt (your best friend with this program) how to get that stegasrc.zip
You can hide another file inside Bmp/Gif/Lst/Pcx/Raw/Tga/Txt/Voc/Wav file.

There is so many ways to hide data. Few extra spaces at end of line, few capital letters inside big text, or change almost anything. This program is really moderators nightmare.

;:::;;;;;;;;;;;;;;;;;;;;;;;;;;;;;:;;::;:;:;:;;::;::;;:::;;;;;;:;;::;:::;;:;::;:;;:;;:;:;;;;

To use only picture half of example picture with 4 bits.
(copy gif, seek zip, clear 2 low bits, hide zip)
copy stega.gif s2.gif
stega -b1,2 s2.gif stegasrc.zip
stega +b1,2 s2.gif
stega +b1,4p0,180,140 s2.gif stegasrc.zip

Even gif file global color palette can used to hide 92 bytes message (must use raw format)
ren test.gif test.raw
stega +p13,1,0 test.raw text.txt
ren test.raw test.gif


Description: Stega v2.01 - Tiny 4k steganography program
Download
Filename: Stega.zip
Filesize: 62.25 KB
Downloaded: 472 Time(s)



Last edited by ATV on 30 Oct 2006, 08:27; edited 2 times in total
Post 24 Oct 2006, 13:07
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Reverend



Joined: 24 Aug 2004
Posts: 408
Location: Poland
Good job!
Here is my BMP-Cipher written long ago (source is in masm). It is windows version that enables to hide text and files (even with original filename Razz) in a .bmp file. It's amazing that you support so many formats
Post 24 Oct 2006, 13:25
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ATV



Joined: 31 Aug 2004
Posts: 109
Location: Finland
I was writing many different formats in 2000. Then 2001 I write all them into one program.
There was some talk that September 11 messages was hidden inside some picture, I didn't release this version because there was so much things going on.
That command line parameter stuff seems big mess now after 5 years.

Reverend, I will check your program when I get home.
Post 24 Oct 2006, 13:40
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7108
Location: Slovakia
very nice. i think we should move it to Projects section. I am collecting interested projects there, and cleanning mess from it. So people will find this thread even after a week Wink

do you want me to move it there? (and delete this post and your answer)
Post 24 Oct 2006, 13:52
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ATV



Joined: 31 Aug 2004
Posts: 109
Location: Finland
Reverend, your program is not safe, you should at least use little xor crypt.
My stega can read your programs hidden text or file (with filename and extra bytes after file)
stega -h0p1,1,0 test.bmp x.txt

File can be read by skip over asciiz filename and use stored 32bit filesize
first p number is bits to skip over (5+1)*8+1=49
stega -p49,1,0 test.bmp x.bin


Last edited by ATV on 26 Oct 2006, 07:02; edited 2 times in total
Post 25 Oct 2006, 07:12
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7108
Location: Slovakia
hehe, i will rather mark it as [DONE]
Post 25 Oct 2006, 09:38
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Reverend



Joined: 24 Aug 2004
Posts: 408
Location: Poland
ATV: I know my program is not anyhow secured, but it wasn't supposed to. It's just a proof of concept, an evidence that I can do such thing.
Post 27 Oct 2006, 22:19
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ATV



Joined: 31 Aug 2004
Posts: 109
Location: Finland
Above attachment updated

Now with FASM source
Post 30 Oct 2006, 08:28
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rugxulo



Joined: 09 Aug 2005
Posts: 2310
Location: Usono (aka, USA)
Man, this is confusing stuff, I do NOT pretend to understand all those cmdline options (eek!).

But ... is this correct?

stega -h0 1.txt con (where 1.txt is "WaRnING" etc.)
Quote:

Found :)


and ...

stega -b3u59=58 2.txt con (where 2.txt is ";:::;;;;;;;" etc.)
Quote:

Yes ;-)


If not, oh well.

P.S. Check out Snow (GPL, but written in C) since it's cool too!
Post 02 Nov 2006, 07:05
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ATV



Joined: 31 Aug 2004
Posts: 109
Location: Finland
Congratulations rugxulo, You are right. First message has also file size so stega - 1.txt con is enougth. Now I know I must hide my next message better. (nothing extra in this post)

I think I have snow already (DOS part), but seems there is something new, I have to look that. Maybe I need to check what new has happend in steganography world in last 5 years.
Post 02 Nov 2006, 14:45
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dead_body



Joined: 21 Sep 2005
Posts: 188
Location: Ukraine,Kharkov
good work.
Post 03 Nov 2006, 07:40
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