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 65.108.55.203 on port 56717 TCP:
$ telnet 65.108.55.203 56717
Trying 65.108.55.203…
Connected to 65.108.55.203.
Escape character is ‘^]’
$ nslookup 65.108.55.203
static.203.55.108.65.clients.your-server.de
Referencing malware samples (MD5 hash):
13c79b9cb9be286b71e0f529ad3b9402 — AV detection: 21 / 67 (31.34%)
77bcc820076decab4b92833e4882caff — AV detection: 25 / 68 (36.76%)
fb6b71da0cf35a642c14c1b2c5b96193 — AV detection: 27 / 69 (39.13%)