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Crack a winzip file ?

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Old 19 March 2007, 08:43 PM
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pimmo2000
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Default Crack a winzip file ?

I need to gain access to a zip file my mum made a long time ago containing important family information...

Since my mum is no longer with us, I'm having trouble asking her for the password !!

Its her will, my dads Will and someother money type docs !! All .doc format so no pictures she wouldnt want me to see

Any help ?
Old 19 March 2007, 08:48 PM
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StickyMicky
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i found a tool that used brute force to crack a zip file, and i cant remember how long it was going to take, but it was a very long time, so i gave up

i have been trying to find out the password for the updated files for my work CCTV system, but the chinese tech support is really dire and have not replied to any emails (buy cheap chinese DVR cards and pay the price i suppose!!!!)
Old 19 March 2007, 08:53 PM
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LOL just tried another one and the current estimate for cracking is 5000 years PMSL!!!
Old 19 March 2007, 08:55 PM
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Dracoro
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If a standard passworded file then you may b able to crack it. If it's been encrypted at 128 or 256 bit AES then good luck trying lol
Old 19 March 2007, 08:56 PM
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holy crap i changed it from letters and numbers brute attack to plain numbers and it cracked it in 15 seconds
Old 19 March 2007, 09:08 PM
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Filename: 6800_en_V7.4.0.1/UnInstall.exe
Password: 806807

Total Time: 11.610 s
Total Passwords Tested: 916807
Passwords Tested per Second: 78967

complete result

works cctv system gets an update tomorrow
Old 19 March 2007, 09:13 PM
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Originally Posted by StickyMicky
complete result

works cctv system gets an update tomorrow
pm the program name pls ?

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Old 19 March 2007, 09:19 PM
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picozip

it was one of the first ones i tried from a google search ?

i think i was lucky in that i knew the last previous password used in my case was 999999999, so i figured they might stick with just useing numbers
Old 19 March 2007, 10:50 PM
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Alan C
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Can I ask what version the Winzip file was??? V9 Beta 1 had the first AES specification..

Because if it was 9+ I'm off to do some more research on how Winzip stores passwords in its AES application..

In a nutshell, that 6 figure password was very weak and 9 9's wouldn't have fared much better. But at least it gave you an indication that it was all numbers.. good work.
Old 20 March 2007, 08:28 AM
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i have no idea how to tell which version of winzip was used?

i can give you a link to the zip file if you like

http://www.wave-p.com/dvr_download/6800_en_V7.4.0.1.zip

the site is very slow, not sure if this is because its based in china or not? but it is always slow for me 24/7 the download took nearly an hour last time.

i assume they release the password for the files on the BBS forum but i could never find anything that would translate the pages to english
Old 20 March 2007, 07:07 PM
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Alan C
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Slow for me too @1.1 Kbs

No issue.. main thing is you managed to crack it. I'll assume it's pre v9.0
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