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crackme ------->img v
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bronox
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PostPosted: Wed Sep 05, 2007 1:15 pm    Post subject: crackme ------->img v Reply with quote

ok here is a simple picture .....
inside the picture is a code....
if u want to find out if the code is right
just put the code inside the rar..

so simple there is a code inside the picture(hidden code) you need to find it


Last edited by bronox on Wed Sep 05, 2007 9:50 pm; edited 1 time in total
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zart
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PostPosted: Wed Sep 05, 2007 1:16 pm    Post subject: Reply with quote

This forum isn't for password protected zips/rars.

The point is to make a program that you coded your own protection into and for us to reverse it.

This would just require a bruteforcer and can not be reversed.

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appalsap
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PostPosted: Wed Sep 05, 2007 1:22 pm    Post subject: Reply with quote

You could be one of three peoples:

1. You do not understand how rars are passworded and naively believe it is provided by WinRAR even though the decompression algorithm is public. This means you are an idiot.

2. You understand how rars are passworded and derive some satisfaction from knowing this is an impossible problem, and didn't look at any of the other threads in this section to see what this is for. This also means you are an idiot.

3. You do not understand how rars are passworded but you don't care, you just want a certain file inside that rar that does not belong to you and think people will crack it for you if you present it as if it were your own challenge. Yes, this also means you are an idiot.

Who are you?
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haha01haha01
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PostPosted: Thu Sep 06, 2007 7:23 am    Post subject: Reply with quote

this should be on random spam section.

no wait, ppl with such low IQ shouldnt be registered on CEF anyway.
but i still dont get one thing: if we can get the encryption algo, so y cant we open the passworded archive on hex view and decrypt it?
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zart
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PostPosted: Thu Sep 06, 2007 12:51 pm    Post subject: Reply with quote

haha01haha01 wrote:
this should be on random spam section.

no wait, ppl with such low IQ shouldnt be registered on CEF anyway.
but i still dont get one thing: if we can get the encryption algo, so y cant we open the passworded archive on hex view and decrypt it?


Win-rar.com wrote:

I have forgotten my password, how can I recover it?


RAR encryption does not contain backdoors, so the only possible way to
find a password is to test all possible character combinations.

Remember that if you lose your password, you will be unable to retrieve the encrypted files, not even the WinRAR author is able to extract encrypted files.


The rar is encrypted with the password, yielding a 1 to 1 solution. When you decrypt it you are checking if your password yields this solution - your not comparing the password to the password (or some type of serial) unlike most crackmes and keygenmes.

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haha01haha01
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PostPosted: Thu Sep 06, 2007 11:02 pm    Post subject: Reply with quote

oh.... so we can decrypt it with any pass we will like but if its wrong the files will be dmged?
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bronox
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PostPosted: Fri Sep 07, 2007 3:11 am    Post subject: Reply with quote

this is a way to encrypt a password in a img with out dmging the file =p
the rar is only to check if the psw is right =p
Wink
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zart
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PostPosted: Fri Sep 07, 2007 7:47 am    Post subject: Reply with quote

haha01haha01 wrote:
oh.... so we can decrypt it with any pass we will like but if its wrong the files will be dmged?



You would get a CRC error and most programs wouldn't decrypt anything

bronox wrote:

this is a way to encrypt a password in a img with out dmging the file =p
the rar is only to check if the psw is right =p


Then why didn't you say this was stenography?

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bronox
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PostPosted: Fri Sep 07, 2007 9:21 am    Post subject: Reply with quote

i forgot =p
and btw you can decode it =p
i can decode it in 20 sec =p
and take a hit the psw starts with 4d3e7.............
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zart
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PostPosted: Fri Sep 07, 2007 9:33 am    Post subject: Reply with quote

bronox wrote:
i forgot =p
and btw you can decode it =p
i can decode it in 20 sec =p
and take a hit the psw starts with 4d3e7.............


Well without the original it's actually kind of hard. And like most stego knowing where it is makes it damn easy to find. I don't see a CE forum logo in gif format Wink Though that'd be to easy, but I don't feel like wasting my time trying to get a conversion to come out exactly the same since I don't know what tools you used, mine it defaulting to 71 dpi where yours is 96 dpi.

I did a quick search for the easy stego methods, checking headers and appendages at the end.

As for "starts with 4d3e7" - well one... 4D 3E only occurs once, and it isn't followed by a 7... It doesn't occur in text either.

As for "psw" I think you mean password - but I honestly have never seen it typed as such... maybe pwd... lol

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bronox
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PostPosted: Fri Sep 07, 2007 9:37 am    Post subject: Reply with quote

ok i will tell you what i did the are 2 encryptions =p
1. protection of the password with out the protection code you cant find out the psw =p
2. the password =p
and btw it is much harder then you think ^_^
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zart
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PostPosted: Fri Sep 07, 2007 9:42 am    Post subject: Reply with quote

Well then you obviously used a program to encode it then - most likely JPHide or JSteg... F5 or StegHide are possible but unlikely.

Since you've encoded it with a password - the only way to attack it would be a brutefoce. Since the "psw" starts with "4d3e7" i'm assuming it's not a dictionary word.


In other words - this would take to much processor time and man hour time to attempt - and I'm not going to bother trying it.

Yes it takes "20 seconds" to decode, with the programs and with the passwords. Without the programs and without the passwords is a different story, and is where we will be coming from.

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bronox
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PostPosted: Fri Sep 07, 2007 10:50 am    Post subject: Reply with quote

Laughing
you can use adobe photoshop as well to this crack =p
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Creeping Death
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PostPosted: Fri Sep 07, 2007 3:47 pm    Post subject: Reply with quote

with ease.
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haha01haha01
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PostPosted: Sat Sep 08, 2007 3:00 am    Post subject: Reply with quote

cracking passworded archives is almost impossible without the un passworded archive. so now stop posting rar passworded crackmes, its the second or thrid time some1 post those stuff in the last month and its pure spam.
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