Imagine: a new APT is discovered and various software providers quickly announce patches that halt its ability to infiltrate. The first time this happened was in 2014, when the WannaCry ransomware spread across Europe before being stopped by antivirus software. Not if the worm is already in, because it has already worked its magic and has become an accepted part of the software structure of your company. As the German Parliament has discovered to its cost, the only effective way to get rid of the bug is to close your entire system and rebuild. The attached report from Spirent doesn't carry any new insight, but it does explain in layman's terms how these worms work.
Imagine: a new APT is discovered and various software providers quickly announce patches that halt its ability to infiltrate. At this stage you might feel safer? Not if the worm is already in, because it has already worked its magic and has become an accepted part of the software structure of your company. As the German Parliament has discovered to its cost, the only effective way to get rid of the bug is to close your entire system and rebuild. The attached report from Spirent doesn't carry any new insight, but it does explain in layman's terms how these worms work.