The host at this IP address is obviously operated by cybercriminals. It is running a malware botnet controller which is being used to control infected computers (bots) around the globe using a trojan horse.
Malware botnet controller located at 191.237.249.247 on port 1996 TCP:
$ telnet 191.237.249.247 1996
Trying 191.237.249.247…
Connected to 191.237.249.247.
Escape character is ‘^]’
$ dig +short windwosupdate.ddns.net
191.237.249.247
Referencing malware samples (MD5 hash):
30360a808a297f4716a3827c47e0b0ef — AV detection: 30 / 68 (44.12%)