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 18.118.173.193 on port 333 TCP:
$ telnet 18.118.173.193 333
Trying 18.118.173.193…
Connected to 18.118.173.193.
Escape character is ‘^]’
$ nslookup 18.118.173.193
ec2-18-118-173-193.us-east-2.compute.amazonaws.com
$ dig +short b2b.ddns.com.br
18.118.173.193
Referencing malware samples:
MD5 f97ee2a5b3396760e99dbdf533d464dc