# Can you Crack It?

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• 1st December 2011, 12:20 PM
dwhyte85
Quote:

Originally Posted by nephilim
Hex works in base 16...split the letters into 16 segments, then convert it!

Hex is base 16 :P
• 1st December 2011, 12:20 PM
LosOjos
I'm getting nowhere, put it all in HxD but it was never going to be that easy was it?

@nephilim - really intrigued how you got "Infinity"? The numbers involved seem too large to convert to ASCII...
• 1st December 2011, 12:23 PM
SYSMAN_MK
Infinity is 49:6e:66:69:6e:69:74:79 in Hex
• 1st December 2011, 12:36 PM
Rydra
Assuming this is Hexadecimal base 16, the 'easiest' solution is to assume it's ASCII character table.

From this, hex code '20' would be a space, and '48' to '57' would be numbers, '41' to '5A' would be uppercase letters, and '61' to '7A' would be lowercase letters. I would be highly surprised if there was non-alphabetical letters in there, so anything not in these ranges is unlikely to be real.

Anything higher than 7A does not on ASCII convert into a letter. It could in theory be EBCDIC, which is an older style character conversion used in punch cards in the 60's which goes up to FF in hex.

Beyond this I'm out of ideas, and haven't had a chance to have a go myself, but that's the best idea's I've got.

Chances are, that there is a lot of rubbish filler, and it's worth looking for a pattern within it for the gibberish as well as the coding above.

There are also probably more hex code conversions, but I'm not immediately aware of them.
• 1st December 2011, 12:43 PM
dwhyte85
Quote:

Originally Posted by Rydra
Assuming this is Hexadecimal base 16, the 'easiest' solution is to assume it's ASCII character table.

From this, hex code '20' would be a space, and '48' to '57' would be numbers, '41' to '5A' would be uppercase letters, and '61' to '7A' would be lowercase letters. I would be highly surprised if there was non-alphabetical letters in there, so anything not in these ranges is unlikely to be real.

Anything higher than 7A does not on ASCII convert into a letter. It could in theory be EBCDIC, which is an older style character conversion used in punch cards in the 60's which goes up to FF in hex.

Beyond this I'm out of ideas, and haven't had a chance to have a go myself, but that's the best idea's I've got.

Chances are, that there is a lot of rubbish filler, and it's worth looking for a pattern within it for the gibberish as well as the coding above.

There are also probably more hex code conversions, but I'm not immediately aware of them.

As far as i've worked out... it's asm, plus more to do with the cyber.png too... not all about what you see on the image, what's IN the image. Unless there are any other gotchas... i think i might be able to make stage 2 within 10 hrs...
• 1st December 2011, 12:43 PM
mac_shinobi

Can you crack it? - GCHQ - Overclockers UK Forums

'we will be in touch'

Was trying to establish if there was a way to download the asp file ( index.asp ) and view the source code from the asp page
• 1st December 2011, 12:45 PM
dwhyte85
Quote:

Originally Posted by mac_shinobi

Can you crack it? - GCHQ - Overclockers UK Forums

'we will be in touch'

Was trying to establish if there was a way to download the asp file ( index.asp ) and view the source code from the asp page

• 1st December 2011, 12:46 PM
bandgeekmafia78
My theory is that if you can somehow plot the Hex onto a graph on a scientific calculator, the hex might 'curve' to shape/draw letters on the graph. A bit like SIN/COS/TAN

• 1st December 2011, 12:47 PM
localzuk
Quote:

Originally Posted by mac_shinobi

Can you crack it? - GCHQ - Overclockers UK Forums

'we will be in touch'

Was trying to establish if there was a way to download the asp file ( index.asp ) and view the source code from the asp page

Too long. The text field only accepts 18 characters, that is 19.
• 1st December 2011, 01:21 PM
LeightonJames
Wow, glad to see that this has piqued some interest!!

Apparently it is only one word and there is a hell of a lot of padding in the hex string.

Even armed with that information i don't know what to do :(
• 1st December 2011, 01:26 PM
bandgeekmafia78
Someone has put some extra information on pastebin, but even with that information I'm a long way from cracking it :(

If anyone wants that info PM me and I'll send it across.
• 1st December 2011, 01:27 PM
JJonas
so if just one word is it possible to break it with a dictionary attack?
• 1st December 2011, 01:29 PM
localzuk
Quote:

Originally Posted by JJonas
so if just one word is it possible to break it with a dictionary attack?

You'd have to create a script to strip out padding and try combinations of letters, and then run them through a dictionary.

But with that number of hex pairs, you're going to have a lot of combinations, so potentially a lot of random words...
• 1st December 2011, 01:31 PM
mac_shinobi
[C] rc4dc.c - www.canyoucrackit.co.uk - part #1 - Pastebin.com
• 1st December 2011, 01:33 PM
bandgeekmafia78
Quote:

Originally Posted by mac_shinobi
[C] rc4dc.c - www.canyoucrackit.co.uk - part #1 - Pastebin.com

Thats what I was referring to.

Does this need to be saved into C and compiled?
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