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 How to crack a Binary File Format
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Ktomislav




PostPosted: Fri Sep 19, 2008 2:09 pm   Post subject: How to crack a Binary File Format

Does anyone have any ideas how to crack a binary file format?

By crack i mean to find out how to read it in normal text format.
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StealthArcher




PostPosted: Fri Sep 19, 2008 3:57 pm   Post subject: RE:How to crack a Binary File Format

Theoretically, you already can by specifying read in Turing rather than get. Then read in all of the file as strings. Jut remember, not all files are text, so with things like bmps you'll get weird ****.
r691175002




PostPosted: Fri Sep 19, 2008 4:02 pm   Post subject: Re: How to crack a Binary File Format

It depends a lot on the format of course. Really it could be as simple as decoding it as a normal string or as complicated as stripping away layers of encryption, compression and sorting through a mess of unintelligible data.
PaulButler




PostPosted: Fri Sep 19, 2008 7:38 pm   Post subject: RE:How to crack a Binary File Format

Do you know what the data is supposed to be? If it's something simple and uncompressed (image, video, audio, numbers), think of how you would store that data. Then look for signs that they are storing data in a similar way. Unless they are intentionally trying to obfuscate it, chances are they had the same thoughts you do.

If it's a popular file format, try: http://www.wotsit.org/
Ktomislav




PostPosted: Sat Sep 20, 2008 8:18 am   Post subject: Re: How to crack a Binary File Format

It's a backup from router and i want to know the password.
Zeroth




PostPosted: Sat Sep 20, 2008 10:29 am   Post subject: Re: How to crack a Binary File Format

The password isn't going to be in plaintext if its a decent router. It'll be encrypted, with a key that you won't be able to find. Even D-link routers encrypt the passwords. If you have physical access to the machine... you could always... reset it to factory default.
Ktomislav




PostPosted: Sat Sep 20, 2008 12:19 pm   Post subject: Re: How to crack a Binary File Format

Quote:
Even D-link routers encrypt the passwords


Do you think D-link is the worst or what?
Zeroth




PostPosted: Sat Sep 20, 2008 12:24 pm   Post subject: Re: How to crack a Binary File Format

Ktomislav @ Sat Sep 20, 2008 9:19 am wrote:
Quote:
Even D-link routers encrypt the passwords


Do you think D-link is the worst or what?

Yes.
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Insectoid




PostPosted: Sat Sep 20, 2008 1:37 pm   Post subject: RE:How to crack a Binary File Format

Yup, D-link sucks. We had a D-link router and it died within a few months, and while it still worked the signal was inconsistent.
Dan




PostPosted: Sat Sep 20, 2008 4:20 pm   Post subject: Re: How to crack a Binary File Format

Zeroth @ 20th September 2008, 10:29 am wrote:
The password isn't going to be in plaintext if its a decent router. It'll be encrypted, with a key that you won't be able to find. Even D-link routers encrypt the passwords. If you have physical access to the machine... you could always... reset it to factory default.


My bet is that it hashs the password so there is no key, probably with sha1 or md5. So unless you know the hashing algorithm and have a rainbow table (witch would take up TBs of space and a prity impersive mashen to run) set up for it you probably are not going to crack it and thats only if they did not salt it befor hashing.
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