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 161.97.148.204 on port 1604 TCP:
$ telnet 161.97.148.204 1604
Trying 161.97.148.204…
Connected to 161.97.148.204.
Escape character is ‘^]’
$ nslookup 161.97.148.204
vmi777392.contaboserver.net
$ dig +short ms-insider.net
161.97.148.204
Referencing malware samples (MD5 hash):
aa551c7de85ef21b2ea8d377d79a5e6a — AV detection: 50 / 69 (72.46%)