Cybersecurity systems are getting better at identifying and preventing attacks coming from all directions. At the same time, hackers are coming up with new ways to bypass these systems. While online scams are the most common ways to do this, cybercriminals have discovered a new attack method using Microsoft Office.
The Office exploit takes advantage of Microsoft’s Dynamic Data Exchange (DDE), a protocol that sends messages and data between applications. For example, DDE can be used to automatically update a table in a Word document with data collected in an Excel spreadsheet.
The problem with this is hackers can create DDE-enabled documents that link to malicious sources rather than to other Office apps. Theoretically, this allows hackers to launch scripts that download Trojan viruses from the internet and execute it before the user is even aware of the attack.
And unlike most malware-embedded Office files, which are usually blocked by security protocols from Microsoft, DDE exploits are instant. Once a compromised Word file is opened, it automatically executes the hack.
What’s even more alarming are the DDE vulnerabilities in Outlook. Recent reports found that hackers can embed malicious code in the body of an email or calendar invite, allowing them to perform phishing scams without a file attachment.
Fortunately, Outlook DDE attacks are not as automated as Word or Excel DDE attacks. Two dialogue boxes will usually appear when you open the email asking if you want to update a document with data from linked files and start a specific application. Simply clicking ‘No’ on either of these boxes will stop the attack from executing.
Beyond saying no, you can protect yourself by following these security best practices:
Last but not least, consider working with our team. We’re Microsoft Office experts who can keep you safe from the latest threats. Call us today to get started!