I simply enter the IP you gave me into http://www.completewhois.org/
Internet Assigned Numbers Authority seems like a network
organisation in US. Nope can't kill them 
You can check out their website at http://www.iana.org/
The IANA receives many reports of spam, apparent hacker
activity, and other forms of abuse. Most frequently, people make
these reports because they have found an Internet address
associated with the abusive activity, and through a bit of
research, they find the IANA's name associated in some way with
that address.
In virtually all such cases, the association of the IANA's name
with a particular address is not actually useful in dealing with
the abuse incident. The IANA is not an ISP, and it has absolutely
no control over the use of any Internet Protocol (IP) addresses
except the very few that are directly tied to the iana.org domain
name.
Well, I guess the only way is to keep your virus definitions
updated and your firewall active at all times.
Does it attack you repeatedly?
