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 51.222.69.215 on port 8320 TCP:
$ telnet 51.222.69.215 8320
Trying 51.222.69.215…
Connected to 51.222.69.215.
Escape character is ‘^]’
$ nslookup 51.222.69.215
ip215.ip-51-222-69.net
Referencing malware samples (MD5 hash):
be8ad8e33f2d3740ff4259249aa5e710 — AV detection: 48 / 66 (72.73%)