cmo Posted September 15, 2006 Share Posted September 15, 2006 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 Quote Link to comment Share on other sites More sharing options...
Sparda Posted September 15, 2006 Share Posted September 15, 2006 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. Quote Link to comment Share on other sites More sharing options...
cmo Posted September 15, 2006 Author Share Posted September 15, 2006 ...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 Quote Link to comment Share on other sites More sharing options...
Sparda Posted September 15, 2006 Share Posted September 15, 2006 To what extent is it passworded? Is it passworded so it needs a password to read or just write or what? Quote Link to comment Share on other sites More sharing options...
cmo Posted September 15, 2006 Author Share Posted September 15, 2006 The password is to open the spreadsheet... Quote Link to comment Share on other sites More sharing options...
VaKo Posted September 15, 2006 Share Posted September 15, 2006 http://www.straxx.com/excel/password.html http://www.google.co.uk/search?hl=en&q...assword+cracker Quote Link to comment Share on other sites More sharing options...
Sparda Posted September 15, 2006 Share Posted September 15, 2006 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. Quote Link to comment Share on other sites More sharing options...
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