The host at this IP address 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 at 185.251.89.83 on port 443:
$ telnet 185.251.89.83 443
Trying 185.251.89.83…
Connected to 185.251.89.83.
Escape character is ‘^]’
Malicious domains observed at this IP address:
larekylo.top. 600 IN A 185.251.89.83
larekypt.top. 600 IN A 185.251.89.83
leadvo07.top. 600 IN A 185.251.89.83
leaehi03.top. 600 IN A 185.251.89.83
lealyg10.top. 600 IN A 185.251.89.83
leaozg08.top. 600 IN A 185.251.89.83
leaucn04.top. 600 IN A 185.251.89.83
leazih01.top. 600 IN A 185.251.89.83