up vote 1 down vote favorite
share [g+] share [fb]

I have a piece of software i have to install on company laptops. The installer needs a serial to work properly, but i don't have it (my manager isn't here so i cant ask him). The installer tells me to ring a phone number which doesnt appear to be connected anymore. I would download win32dasm and ollydbg and have a go at cracking the installer but i dont really have time and i havnt done it in years.

There is a zip file on the disc that looks like it contains all the program files but it is passworded. Is it feasible to crack this or will it take ages?

link|improve this question
87% accept rate
feedback

3 Answers

up vote 1 down vote accepted

I've cracked some ZIP passwords in a few hours, so i would definitelly give it a try, for example, with ZipCure

link|improve this answer
feedback
up vote 1 down vote

As this is old software, it could be that it's using the old version of Winzip encryption - which is very crackable. A Google search will quickly turn something up.

Since Winzip v9, the encryption uses AES, which is secure.

link|improve this answer
It has XceedZip.dll in the directory so i could in theory find out the function that passes the password and see what its giving. The website for the problem software is offline as well as the phone so i think im a bit stuck :( – tm1rbrt Jan 15 '10 at 11:45
feedback
up vote 0 down vote

You can use some zip password recovery softwares, but it will take a long time if the password is strong. These programs generally use brute force and you will need a password dictionary for that.

link|improve this answer
feedback

Your Answer

 
or
required, but never shown

Not the answer you're looking for? Browse other questions tagged or ask your own question.