Microsoft Office files can be password-protected in order to prevent tampering and ensure data integrity. But password-protected documents from earlier versions of Office are susceptible to having their hashes extracted with a simple program called office2john. Those extracted hashes can then be cracked using John the Ripper and Hashcat.
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John will start cracking, and depending on the password complexity, will finish when a match is found. Press almost any key to view the current status. When the hash is cracked, a message will be displayed on-screen with the document's password: Since our password was pretty simple, it only took seconds to crack it.
When it comes to password cracking of any kind, the best defense technique is to use password best practices. This means using unique passwords that are long and not easily guessable. It helps to utilize a combination of upper and lowercase letters, numbers, and symbols, although recent research has shown that simply using long phrases with high entropy is superior. Even better are long, randomly generated passwords which makes cracking them nearly impossible.
In regards to this specific attack, using Microsoft Office 2016 or 2019 documents or newer may not be effective, since office2john is designed to work on earlier versions of Office. However, as you can see above, Office 2016 may very well spit out a 2013 document without the user even knowing, so it doesn't mean a "new" file can't be cracked. Plus, there are still plenty of older Microsoft Office documents floating around out there, and some organizations continue to use these older versions, making this attack still very feasible today.
Today, we learned that password-protected Microsoft Office files are not quite as secure as one would be led to believe. We used a tool called office2john to extract the hash of a DOCX file, and then cracked that hash using John the Ripper and Hashcat. These types of files are still commonly used today, so if you come across one that has a password on it, rest easy knowing that there is a way to crack it.
Each Microsoft Office app hasa product key associated with it. In case a office 365 product key crack isused, the company can easily track it. This is because Microsoft allows one IPaddress for a single installation session. In case, the same IP is used formultiple installation, the company decodes that a crack version is being used.
No matter whether you are anindividual or a company, Microsoft is well within its rights to sue you. Thisis because the Microsoft Office 365 crack version is an official violation ofits intellectual property. You can be slapped with a legal notice or heftyfines running to the tune of thousands of dollars.
An office 365 crack version can render your user experience to nothing even if you are using a genuine version of Windows operating systems. Certain features present in the genuine version may be completely off limits in the crack version.
It is always advised that you avoid using the Microsoft office 365 crack versions. This is because your private data is at the risk of being compromised. Moreover, Microsoft will come to know about illegitimate use of its property and might subject you to heavy fines.
The project is built and managed publicly on GitHub at -microsoft365 and accepts community contributions. We would encourage you to try it and tell us what you think. We would also love your help! We have a number of feature requests that are a good starting point to contribute to the project.
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In general, because a key of n bits can have 2npossible values, there can be at most 2n differentkeys. For example, a 16-bit key can have216 or 65,536 different values. If you had a computer thatcould try 100 of these keys every second, it would take 654 seconds orroughly 11 minutes to try all possible keys. (If you are cracking manykeys, the expected time to crack any given key is half that, as onaverage you will need to try half of the keys before you find theright one. Of course you could get lucky and try the key on your firstattempt, or you could be unlucky and have to try nearly every single key.)
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