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excel passwords...


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Posted

Hi guys,

I've just watched the podcast demonstrating the use of rainbow tables with windows passwords.

Can rainbow tables be used in a similar way to reveal excel 2003 passwords (or any other passwords, apart from windows logins)?

Cheers,

cmo

Posted

Rainbow tables can be used in any situation where the algorthyem that is used to encypt (or hash) the passwords stays the same all the time. As such it can be used for MD5 hashes (phpBB stores user passwords as md5 hashes) and other such things.

Posted

...so what software do I need to generate a hash file from a password protected spreadsheet to use with rainbowtables?

There's plenty of websites offering to recover excel passwords but at a rather high cost for one spreadsheet.

Is it obvious, because I'm having a hard time figuring it out...

Cheers,

cmo

Posted

That means the spread sheet is RC4 encypted... and the password is not stored (becasue it is the key for the speadsheet). You may have to resort to a RC4 brute force, I havn't looked paticulaly far yet, but I havn't been able to find a RC4 brte forcer specificly targeted at execl spreadsheets.

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