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 126.96.36.199 on port 2021 TCP:
$ telnet 188.8.131.52 2021
Connected to 184.108.40.206.
Escape character is ‘^]’
Referencing malware samples (MD5 hash):
12e38a97ae27458244ac1a034514072b — AV detection: 27 / 66 (40.91%)