How to Remove the Password from a Zip File Without Knowing the Password ??

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Part-1 (Preparing To Removing a Password)



1
Understand the risk. You'll need to download a program that can guess the password on the ZIP folder. Before you do this, be aware that this can infect your computer with a virus. Review safe browsing practices and install antivirus software before you continue.
  • Most free trial versions will only crack short passwords. If a program not listed here offers unlimited cracking for free, refrain from downloading it as it may be malware.


2
Expect this process to take a large amount of time. Most password-cracking programs will take several hours to guess the simplest of passwords; realistically, you can expect this process to take several days to complete.
  • There is no way to routinely guess the password within a few minutes. Any service claiming to do so is most likely malware.[1]

3
Close background programs. You'll need as much of your computer's processor speed as possible, so close any processing-heavy programs such as Photoshop, video games, audio and video players, and so on.
  • Even with your computer's maximum amount of processing speed allocated to cracking the ZIP folder's password, the process can still take days.

4
Place your ZIP folder on the desktop. The desktop is the most-easily accessed location on your computer, so drag the ZIP folder onto the desktop before attempting to crack its password.
  • You can also copy-and-paste the ZIP folder by selecting the folder, pressing Ctrl+C (Windows) or ⌘ Command+C (Mac), going to the desktop, and pressing Ctrl+V or ⌘ Command+V.
  • If the ZIP folder is on a mobile item such as a smartphone or a tablet, transfer the folder onto a computer before proceeding.

Part-2 (Using John The Ripper)


1
Understand how this method works. John the Ripper is a free, command line-based program that can be used to crack passwords. Unfortunately, while it is free, it can be tricky to install and use.


2
Download John the Ripper. Go to http://www.openwall.com/john/ in your computer's web browser, then click the John the Ripper 1.8.0-jumbo-1 (Windows binaries, ZIP, 34 MB) link in the "community enhanced version" section near the bottom of the page.


3
Extract John the Ripper. Double-click the downloaded ZIP folder, click the Extracttab, click Extract all, click Extract, and wait for the window to open.


4
Install John the Ripper. John the Ripper can't be installed like normal programs, but you can install it to your desktop by moving its folder there and then renaming it to "john":
  • In the extracted window which opens, click the "john180j1w" folder.
  • Press Ctrl+C
  • Open your desktop, then press Ctrl+V.
  • Right-click the folder, then click Rename
  • Type in john and press ↵ Enter.

5
Place your ZIP folder in the John the Ripper "run" folder. Copy the folder by clicking it and pressing Ctrl+C, then open the "john" folder, open the "run" folder, click a blank space, and press Ctrl+V.


6
Open Command Prompt. This is your computer's command line program:
  • Click Start 
    Image titled Windowsstart.png
  • Type in command prompt
  • Click 
    Image titled Windowscmd1.png 
    Command Prompt at the top of the Start window.

7
Change the directory to John the Ripper's "run" folder. Type in cd desktop/john/run and press ↵ Enter.


8
Enter the "run" command. Type in zip2john.exe name.zip > name.hash (making sure to replace "name" with the name of your ZIP folder) and press ↵ Enter.
  • For a ZIP folder named "hello", for example, you'd type zip2john.exe hello.zip > hello.hash here.

9
Define the ZIP folder's hash. Type in name.hash (where "name" is the name of your hash file) and press ↵ Enter. At this point, you're ready to begin cracking the password.


10
Begin cracking the password. Type in john.exe --pot=name.pot --wordlist=john/run/password.lst name.hash and press ↵ Enter. John the Ripper will begin comparing your ZIP folder's password to its database of passwords.[2]
  • You'll need to replace "name" in both "name.pot" and "name.hash" with your ZIP folder's name.
  • The "password.lst" file contains a list of passwords and their permutations.

11
Prompt the cracked password to display. Once the password has been determined, you'll see "Session complete" appear at the bottom of Command Prompt. At this point, you can type in type name.pot (again, substitute your folder's name for "name") and press ↵ Enter to view the password for the ZIP folder.





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