"As of recently, it started automating its attacks against a wider range of PCs that have various exploitable security vulnerabilities."
Really? What kind of security vulnerabilities? What you really mean is users are uneducated and opening suspicious emails and attachments without thought and infecting their unprotected computers. I have several PCs and MACs in my household and have never had an issue with any kind of ransomware or any other kind of malicious infection (virus, rootkit, worm, malware, etc.) because my family has been educated on the possible cyber threats on the internet and through emails. It's really quite simple and easy on educating people what NOT to do when on a computer. But that's just me and my family. I still work on customer computers that are not running any kind of security software and they purposely disabled the Windows 10 firewall because they considered it a nuisance and/or intrusive (my motto: better having basic protection than having nothing at all). Then they come to me frustrated because their computer has been infected. Yes, really.