More than half of the Web sites foisting malicious software on visitors are located at networks in China, according to data released today. Stopbadware.org, a joint project between researchers at Harvard, Oxford and Google, found that 52 percent of the more than 200,000 infected sites the group analyzed in late May were hosted at Chinese networks. In contrast, U.S.-based networks accounted for 21 percent of the bad sites, Stopbadware found. The sites examined in the study were all reported as malicious by Google, which interestingly enough ranked as the 6th largest source of malicious Web sites in this report, with 4,261 malware sites. Most of those appear to be the result of scammers and virus writers devising ways to automate the creation of sites at Google-owned Blogger.com. This report was released more than a year after Stopbadware’s inaugural malicious sites study, which examined the network distribution of about 50,000 nasty