640,000 Websites Estimated to be Infected with Malware in Q3

Dasient, which monitors website for malware, reported that an estimated 640.000 websites and 5.8 million web pages were infected with malware in the third quarter of 2009. A significant portion of those infected websites, 39.6%, were reinfected during quarter. Websites can become reinfected if the vulnerability that allowed the website to be hacked into is not secured or another vulnerability is discovered. Most infection code consisted of  JavaScript (54.8%) or an iframe (37.1%), with other code, such as .htaccess redirects, accounting for 8.1%.

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