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 66.70.173.61 on port 80 (using HTTP GET):
hXXp://66.70.173.61/cont3/inspecionando.php
$ nslookup 66.70.173.61
ip61.ip-66-70-173.net