The article does not name any of the cloud services used for command and control though it does list some IPs for a small cloud provider from Germany called Pfcloud UG. I doubt they're really a problem.

The greatest threat to the internet currently is not the malware concealed behind cloud services but cloud services themselves breaking the distributed nature of the internet. Some of the clouds, particularly those that flare, just have too much influence and control of internet networking and should be split up. I can't even access congress.gov because it's behind cloudflare. They are running a very effective and very long lasting DoS against millions of americans preventing them from accessing government services and information.