Here's a link to the actual Trendmicro article: https://www.trendmicro.com/en_us/research/23/i/earth-lusca-employs-new-linux-backdoor.html.
Not sure why OP's article linked the version from 2 years ago.
Also an article with more info: https://www.bleepingcomputer.com/news/security/new-sprysocks-linux-malware-used-in-cyber-espionage-attacks/.
Edit:
My understanding of these articles is that there is a hacking group that is targeting public facing servers that are exploitable using other methods and utilizing this sprysocks software to create an opening for them to remotely access the server. If that's the case then this shouldn't affect most Linux desktops or isolated systems. Let me know if anyone has more info.