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 54.39.43.116 on port 1788 TCP:
$ telnet 54.39.43.116 1788
Trying 54.39.43.116…
Connected to 54.39.43.116.
Escape character is ‘^]’
$ nslookup 54.39.43.116
ip116.ip-54-39-43.net
$ dig +short surefellas.dynamic-dns.net
54.39.43.116
Referencing malware samples:
MD5 68653e9ad4d240a722102bce7b5fc16f