In this lecture, we are going to see how we can unlock read only Excel files.
The first step will be a password protected Excel file.
You can give a password to an Excel file by going to properties and in the security tab you can apply
a password that limits modification.
No.
Change the file extension to a zip file.
Open the Z folder in Windows Explorer or Winrar.
Now look for the workbook dot XML file in the Excel folder and open it in a text editor.
Search for the content, file sharing and remove all contents within the tag.
No.
Save the file separately with the same name and then drag it to the actual archive and press the original
file.
Let's see that connection.
First of all, create an Excel file.
Right.
Some content in it.
Click Save.
Now while saving.
Go to both general options and give it a password to modify.
Remember, this attack works only on the password to modify.
We have already seen many attacks to correct the file opening password.
Once saved.
You can open the file and see that it's password log.
Close it.
No, Jane.
The extension of the file to the.
If you don't see your extensions, we can go to you and select the option to show file extensions.
They'll change the file extension to zip.
No.
We have a book.
One zip archive.
Just right.
Click the archive and open it with Windows Explorer.
Now go to Excel folder.
And here you can see a workbook XML file.
No, just drag it to your desktop.
Open it with the notepad.
No press control f.
And search for file sharing.
Delete all the content that is included in file sharing tags.
Save the file.
Drag the file back to the archive.
Click replace.
They'll change the archive extension back to Wexler's X File.
Open it.
And here you can see that our password has been removed.