According to Web security vendor Dasient, a number of 1.3 million Web sites were infected by almost 200,000 different threats during Q2 2010.
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This quarter marks a significant spike in the number of infected websites - almost double the number of the previous quarter.
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Hackers have been very busy and are constantly coming up with new attacks," the vendor writes in its latest quarterly
report.
In addition, the company points out that this is the first quarter when the number of infected websites has passed the one million mark.
The second quarter was also significant because the large number of new unique infections – over 58,000, of which 43,000 JavaScript and 15,000 IFrame injections.
Overall, the number of JavaScript injections has grown by 19% and that of malicious IFrames has decreased by 11%, clearly suggesting that attackers favor the first.
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JavaScripts have access to the DOM elements in the rest of the page, thereby giving attackers more information and more capability to 'muck' with the page.
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Scripts sourced in via IFRAMEs, by comparison, do not have the capability to access or communicate with the rest of the page," the Dasient researchers explain.