Two of the world's biggest ad serving networks – one owned by Google and the other by Microsoft – have been caught delivering booby-trapped banner ads that infect computers with malware without any action required on the part of the end user. The ads on Google's DoubleClick and Microsoft's rad.msn.com contained heavily obfuscated javascript in an attempt to conceal the attack, according to an analysis by web security firm Armorize. As a result, people surfing to Scout.com, MSNBC.com and other sites that relied on the ad platforms were surreptitiously attacked by malicious code that in many cases was able to...