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Excel as a Malware Launchpad: Danger From XLL Files

Criminals are always finding new ways to distribute malware, and the battle against attacks from the internet is continuously fought. Sometimes the good guys win, but no sooner is one threat defused than the next one pops up. Not only that: ransomware attacks are increasing dramatically. In the current case, the attacks are using XLL files, which are used to install malware on the victims’ computers. What XLL files are, why they are so dangerous and how NoSpamProxy protects you from this threat, you will learn in this blog article.


Sender Reputation and Email Security – Part  4: Domain-based Message Authentication, Reporting and Conformance (DMARC)

In the fourth part of our series of articles on sender reputation, we show you how you can use Domain-based Message Authentication, Reporting and Conformance (DMARC) to determine how the receiving server should authenticate your emails and what it should do if authentication fails. In addition, we explain how you can use DMARC to quickly be informed about abuse of your domain and thus protect the reputation of your domain.


One year of 32Guards – and that’s just the beginning 

At the turn of the year 2019/2020, the time had come: 32Guards began to send assessments of emails to the participants of the 32Guards beta. Over the course of 2020, the repertoire of detections grew significantly. In this article, we will look back at a number of developments and show how 32Guards became increasingly active, especially in the second half of 2020.


When the QakBot rings twice

It is not always nice to see old friends again. Especially not when they ring the doorbell at half past five in the morning, rummage through your entire house and then let in a whole gang of acquaintances who rob you. One way or another, the Malware QakBot – also known as QBot or Pinkslipbot-, which was first discovered in 2007 and has been reappearing in increasing numbers for several months.


How healthcare institutions protect themselves against cyber attacks

Since 2019, public authorities, universities and healthcare institutions have increasingly become the target of hacking attacks. The Berlin Court of Appeal, the University of Gießen and the Hospital of Fürth are only the best-known victims of cyber criminals. And they have two things in common: in all cases the IT infrastructures were infected with the malware Emotet, and the consequences of all infections were catastrophic.