About 400,000 members of Google's Orkut social network have been the victims of a spam barrage spreading the W32/KutWormor virus.
Vinay Mahadik, of
Meanwhile, analysts with security vendor BitDefender have detected a new Trojan that hijacks Google text advertisements, replacing them with ads from a different provider. Trojan.Qhost.WU modifies the infected computer's hosts file. The modified file contains a line of code that causes the browser to read ads from a server at the given replacement address rather than from Google.
"This is a serious situation that damages users and Webmasters alike," said Attila-Mihaly Balazs, a BitDefender virus analyst, in a statement. "Users are affected because the advertisements and/or the linked sites may contain malicious code, which is a very likely situation, given that they are promoted using malware in the first place. Webmasters are affected because the Trojan takes away viewers and thus a possible money source from their websites."