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solid332

Office Password Cracking

6 posts in this topic

This might sound kinda newbish, but I'm looking for an opensource utility (live distro?) that can crack an MS Office password. More specifically, Excel 2000.

I've searched Google, but have only come up with commercial software.

Does anyone know of an opensource/live distro that will do the job?

- solid332

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I could be wrong, but Excel uses the following algorithms:

Weak Encryption (XOR)

Office 97/2000 Compatible

RC4, Microsoft Base Cryptographic Provider v1.0

RC4, Microsoft Base DSS and Diffie-Hellman Cryptographic Provider

RC4, Microsoft DH SChannel Cryptographic Provider

RC4, Microsoft Enhanced Cryptographic Provider v1.0

RC4, Microsoft Enhanced DSS and Diffie-Hellman Cryptographic Provider

RC4, Microsoft Enhanced RSA and AES Cryptographic Provider (Prototype)

RC4, Microsoft RSA SChannel Cryptographic Provider

RC4, Microsoft Strong Cryptographic Provider

I don't think Cain supports these.

Can anyone confirm?

-solid

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A couple of weeks ago I got my Security Analyst to look at Cain and we poped open a passworded Microsoft Access file. I thought they use the same password encryption algorithm. Maybe not.

I can run a test for you tonight if you need.

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If it's that important, pony up the $45 for: http://www.lostpassword.com/excel.htm

or $59 for : http://www.elcomsoft.com/aopr.html that will do all office passwords

or this for $99 : http://www.elcomsoft.com/aopb.html

There are also really nice features out there like this:

http://www.decryptum.com/

$39 and they will instant-crack and send the file back to you unencrypted.. offered as a side company of the lostpassword/passware collaberation :)

There may be freebie and nix utils out there that can do this, but I have always found them for windows only.

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Anyway, you can access the file without knowing the password, because AFAIK the files aren't encrypted.

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