CrackMe® Practices for Newbies
PROJECT 5: zipfile.exe

Project 5
Monday, 08-Feb-99 19:22:04
    195.92.194.15 writes:

    Greetings,

    The idea for this project is given to me by iCe. Normally, I would use a CrackMe for this project forum but because it is very interesting, I have decided to go ahead with his idea.

    Idea of this project:
    A text file is zipped using Winzip with password protection. It is then converted to a self-extracting file together with the password. To extract the text file, we will need the password.

    Task:
    1) To find the correct password.
    2) To see if it is possible for us to identify a stable location/combination of codes used by password-protected files.

    Bigger picture:
    If Task 2 is possible, we will then be able to throw away any zipcrackers/pwcrackers (which takes a long time anyway). And we can use whatever method(s) we found to crack ANY password-protected zipfile by converting it to self-extracting file and then crack it.

    How to post:
    Each cracker will create their own threads(one each). And any subsequent postings will be under their own threads. Postings to other crackers will of course be under the thread of whomever you are writing to.

    Rules:
    NO pwcrackers/zipcrackers must be used. Any postings using them will result in deletion with any warnings.

    This is what is written about the protection:
    WinZip uses the industry standard Zip 2.0 encryption format. Password protecting files in a Zip provides a measure of protection against casual users who don't have the password and are trying to determine the contents of your files. The Zip 2.0 encryption format, however, is not as secure as DES and the RSA public key formats used by programs such as PGP, and does not provide absolute protection against determined individuals with advanced cryptographic tools.


    Finally, enjoy yourselves...


    Eternal Bliss

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