Microsoft took down two malware networks yesterday morning (June 30) by seizing control of almost two dozen domain names for Web sites from which the malware was being distributed and controlled. Well, Microsofts sneak attack also took down more than 4 million legitimate websites that were using the same domain name system (DNS) service as the malware networks. The downed websites, both malicious and legitimate, used a Reno, Nevada-based dynamic DNS service called No-IP.