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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Extracting the hash from a password-protected Microsoft Office file takes only a few seconds with the office2john tool. While the encryption standard across different Office products fluctuated throughout the years, none of them can stand up to office2john's hash-stealing abilities.
This tool is written in Python and can be run right from the terminal. As for Office compatibility, it's known to work on any password-protected file from Word, Excel, PowerPoint, OneNote, Project, Access, and Outlook that was created using Office 97, Office 2000, Office XP, Office 2003, Office 2007, Office 2010, and Office 2013, including the Office for Mac versions. It may not work on newer versions of Office, though, we saved a DOCX in Office 2016 that was labeled as Office 2013.
Next, we need an appropriate file to test this on. I am using a simple DOCX file named "dummy.docx" that I created and password-protected with Word 2007. Download it to follow along. The password is "password123" as you'll find out. You can also download documents made with Word 2010 and Word 2016 (that shows up as 2013) to use for more examples. Passwords for those are also "password123."
From the output, we're just interested in the MS Office hash modes. Near the bottom of the help menu, we will find the MS Office mode options and their corresponding numbers. We know from our hash that this is an Office 2007 file, so locate its number ID of 9400.
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.
Whether it works in Ubuntu 20.04 lst (Focal Fossa) or only works in Kali Linux ?? I have an Excel file (2007), tried it in Ubuntu 20.04 LST, with both the options i.e. john and hashcat. I got error msgs in both the options :
Though the .pdf and .xls formats have been around for quite a while and both have always been popular among users, the possibility to export Excel files directly to PDF appeared in Excel 2007. So, if you have any version of Excel 2007 through 365, you can do a PDF conversion in a quick and straightforward way.
Please pay attention that the Excel Holiday Gift List, which was a hard nut to crack for most of the online Excel to PDF converters, present no difficulty at all for this desktop tool!Save the PDF file.If everything is Okay, click Save As on the File tab or press Ctrl + S to save the file. Yep, it is as easy as that!
Note. Foxit Reader saves all the sheets of the selected workbook to PDF. So, if you want to convert only a certain worksheet, save it as an individual workbook first.Converting an Excel file to PDF from ExcelThis approach is recommended if you want more options to preview and customize the resulting PDF document.
Microsoft Product Activation has been cracked or circumvented on numerous occasions since it was introduced in 2001. In 2001, a UK security company called Bit Arts successfully managed to bypass product activation on Windows XP,[41] while in 2003, volume license keys for Windows XP were leaked to the public, allowing users who had not purchased a volume license to the operating system to bypass activation.[42] In 2009, several security flaws in Windows 7 were used by hackers to circumvent activation.[3][43]
Since the introduction of Windows Vista, most attempts at circumvention of product activation have focused on using leaked SLP product keys and BIOS information used by OEMs to preactivate Windows. In 2007, a circumvention measure was developed for Windows Vista by warez-group Paradox that simulates the BIOS, allowing leaked SLP information to be fed to the operating system, bypassing activation.[44] In 2009, SLP product keys and certificate information for Windows 7 were leaked to the public, allowing the BIOS to be reconfigured to bypass activation.[45]
According to this Microsoft information, Microsoft 365 Business Premium should also be able wo work on a RDS server: -us/DeployOffice/overview-shared-computer-activation -us/deployoffice/deploy-microsoft-365-apps-remote-desktop-services
We have a 2019RDS environment. The activation is working properly but we have an issue with our profiles. We are using roaming profiles but every time the user logs out and back in they have to re-enter their password (popup from microsoft). Is there a way we can safe this so we do not need to insert the password every time we login?
Hi Stephen, The activation is working once you login but it does not save the credentials in RDS2019. I assume it is not saving the Office profiles properly. I have taken the steps as you described in SCA but unfortunately this is a time consuming and frustrating issue. Have you got any other tips you can share?
i did the installation of 0ffice 365 in my two RDS servers (we have a RDS farm with two servers), the account i used to do the O365 installation holds a premium license. I did the installation using the office deployment tool and enabled shared activation. User with standard office license get prompted for activation constantly. Does every user that wants to use office app needs to have a premium license? 2ff7e9595c
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