The host at this IP address 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 45.79.239.23 on port 80 (using HTTP GET):
hXXp://45.79.239.23/version.php
$ nslookup 45.79.239.23
li2164-23.members.linode.com
Referencing malware binaries (MD5 hash):
deaad3ea1c708cd99e41c4043169aa4d — AV detection: 20 / 60 (33.33)