There were few warnings about infections on Linux systems from Doctor Web in last few months. I guess that their marketing department started to focus on linux market.
This is a Linux webserver issue. It isn't something that affects desktop client systems. This isn't the first or last piece of malware that goes after vulnerabilities in CMS systems like Wordpress.
They do it because folks fall "prey" to their schemes. The server only issue aside, its one of the reasons I use my workspace in a VM. There are almost no desktop Linux malware products circulating, but of those that do, noticing a VM shuts them down. Not too worried about a breakout.
I used to run VM's, but IMO they take too much resources. And I'm not really scared of Malware on Linux, because I run my browser with Firejail and I have grsec installed. And for the websites I really don't know or are suspicious, I run them inside a "private home" with Firejail.
Not an issue since you have to grant user permission to install a program. Linux has limited user account by default. So its quite difficult to seriously screw up the system.