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It can happen at any time: One click is enough, and the computer is infected, then the network, and then… If the computer freezes or the screen goes black or displays a warning, then something is very wrong. Most likely, it is a cyber attack. But what exactly do you have to do if a cyber attack has been successful and your IT environment is affected, and what legal regulations do you have to observe?
Since April 2019, there is a new type of attacks that use emails as an attack vector: the so-called Email Reply Chain Attacks. The first step in these attacks is to spy on emails. The responses to these emails written by the criminals contain a malicious link or attachment. While this method was initially used on a larger scale by Emotet, other threats such as QakBot (aka Qbot or also Quackbot) have also been added over time.
A wave of email attacks is currently spreading around the world, with the attackers abusing the communication partners’ Exchange servers to send the fake emails. This article explains why this is so dangerous and what you can do now.
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.
Since this week, we have been noticing a new wave of attacks with RTF documents, where spammers use various “file type evasion tricks”.
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.
Every quarter, our 32Guards research team provides new insights into the current threat situation in the field of email security. The findings, assessments and concrete recommendations are of high value for all email administrators and other persons responsible for IT security – regardless of whether NoSpamProxy is used as a product or not.
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.
