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Author Topic: password protected zip file  (Read 1476 times)

never_retreat

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password protected zip file
« on: February 11, 2013, 09:34:45 PM »
How do you open a password protected zip file without the password?
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birdman

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Re: password protected zip file
« Reply #1 on: February 11, 2013, 09:54:15 PM »
Download a freeware brute force cracker for zip files, execute, wait.
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cordex

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Re: password protected zip file
« Reply #2 on: February 11, 2013, 10:02:14 PM »
There were vulnerabilities with a few of the zip applications years ago that meant files could be pretty easily cracked.  If that doesn't apply, as birdman suggests, brute force and time.
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never_retreat

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Re: password protected zip file
« Reply #3 on: February 11, 2013, 10:35:56 PM »
I just download this program.
http://www.brothersoft.com/rar-password-unlocker-270995.html
I moved the file off the laptop and onto the desktop for some horsepower. 2.4 ghz quad core.
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Phyphor

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Re: password protected zip file
« Reply #4 on: February 11, 2013, 11:56:58 PM »
Is it an actual .ZIP file, RAR or ACE?
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never_retreat

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Re: password protected zip file
« Reply #5 on: February 12, 2013, 01:56:12 PM »
Quote from: Phyphor on February 11, 2013, 11:56:58 PM
Is it an actual .ZIP file, RAR or ACE?

RAR file.
14 hours and 16 million tries so far.
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cosine

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Re: password protected zip file
« Reply #6 on: February 12, 2013, 02:05:35 PM »
So you were unlucky and the password wasn't "qwerty123?"  :P
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Andy

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Re: password protected zip file
« Reply #7 on: February 12, 2013, 02:13:48 PM »
Quote from: cosine on February 12, 2013, 02:05:35 PM
So you were unlucky and the password wasn't "qwerty123?"  :P
Probably 9876
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lee n. field

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Re: password protected zip file
« Reply #8 on: February 12, 2013, 02:26:11 PM »
Quote from: never_retreat on February 12, 2013, 01:56:12 PM
RAR file.
14 hours and 16 million tries so far.


Plenty more to go.

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cordex

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Re: password protected zip file
« Reply #9 on: February 12, 2013, 02:49:34 PM »
If you have a good GPU, there are some brute-force applications out there that will supposedly use it to achieve some stunningly fast attempt speeds (as in, more than a million per second) but I don't have any experience with them.
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bedlamite

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Re: password protected zip file
« Reply #10 on: February 12, 2013, 02:53:40 PM »
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birdman

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Re: password protected zip file
« Reply #11 on: February 12, 2013, 02:55:35 PM »
Quote from: cordex on February 12, 2013, 02:49:34 PM
If you have a good GPU, there are some brute-force applications out there that will supposedly use it to achieve some stunningly fast attempt speeds (as in, more than a million per second) but I don't have any experience with them.

Actually, good GPU's are up to 14 BILLION per second.

See this 25 GPU, 348 billion/second monster:
http://securityledger.com/new-25-gpu-monster-devours-passwords-in-seconds/
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cordex

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Re: password protected zip file
« Reply #12 on: February 12, 2013, 03:32:04 PM »
Quote from: birdman on February 12, 2013, 02:55:35 PM
Actually, good GPU's are up to 14 BILLION per second.

See this 25 GPU, 348 billion/second monster:
http://securityledger.com/new-25-gpu-monster-devours-passwords-in-seconds/
As usual I am behind the times.
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