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 158.69.144.161 on port 1234 TCP:
$ telnet 158.69.144.161 1234
Trying 158.69.144.161…
Connected to 158.69.144.161.
Escape character is ‘^]’
$ nslookup 158.69.144.161
ip161.ip-158-69-144.net
$ dig +short solex-feb.duckdns.org
158.69.144.161
Referencing malware samples (MD5 hash):
a13e428bef6d01156cec4c576dc386f1 — AV detection: 31 / 68 (45.59%)