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 52.231.143.69 on port 8703 TCP:
$ telnet 52.231.143.69 8703
Trying 52.231.143.69…
Connected to 52.231.143.69.
Escape character is ‘^]’
$ dig +short woservicewindows10update.xyz
52.231.143.69
Referencing malware samples:
MD5 e47167748dfbcb23841a1702b97e1495