Russian Hackers Can Be US Hackers with Servers in Russia

I have a server with PFSENSE firewall and I've set a remote desktop route for a friend, after a couple of days the computer had a Phobos virus, I've recreated the machine and started to monitor the firewall, there was an IP 176... from Selectel a data center in St. Petersburg Russia hammering my firewall, I called Selectel and they said they would do something. The IP continued to hammer my firewall, I've searched the WHO IS database and I've seen that the IP was leased to a security company ending with LLC (which mostly is a U.S. company), I've checked the registry name and the company belongs to a Network Administrator / Penetration tester of Atlanta ! I really got angry, but I've added dynamic IP to my server and the problem went away; But this was something really unexpected. A guy that works for a big company, having a side business of network security; hacking the U.S. from Russia, knowning the can get away with it doing from russia... simply pathetic !