CSharp Payload Phoning to a CobaltStrike Server, (Fri, Dec 15th)

I found an interesting CSharp source code on VT a few days ago. Its score is only 3/59 (SHA256:5aebf1369b9b54cfc340f34fcc61a90872085a2833fd9bcf238f7c62a5c7620a)[1].
http://news.poseidon-us.com/T09WVP