Security start-up Dasient says more than 640,000 Web sites out of about 5.8 million pages were infected with malware between July and September of this year. Dasient, which specializes in combating malware on Web sites, identified more than 52,000 specific Web-based malware infections, making a total of 72,000 unique infections it has catalogued since the company launched earlier this year.
"There are about 7,000 sites infected every day," says Dasient co-founder Neil Daswani. Dasient has also observed that the reinfection rate on Web sites that have been cleaned up is 39.6%. Attackers use automated scripts or malicious advertisements, among other means, to continually seek to load malware onto sites to perpetrate criminal schemes.