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 185.185.71.153 port 443:
$ telnet 185.185.71.153 443
Trying 185.185.71.153…
Connected to 185.185.71.153.
Escape character is ‘^]’
Malicious domains observed on this IP address:
guardns.biz. 600 IN A 185.185.71.153
localdns.biz. 600 IN A 185.185.71.153