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Following the latest Captcha techniques used by the W32/Koobface worm, it seems that malware authors have turned to Santa for help to deliver the nasty surprise which awaits Facebook users. The infection drops other Trojans, such as FakeAlert, and leaves the user in trouble.
It all begins with a post on a user’s Facebook wall. If the user clicks on the link, he or she sees a fake video player with a Christmas greeting, as shown below.
A fake message states that to view the video the user must download the latest version of Adobe Flash. If the user clicks “install,” the malware runs a variant of W32/Koobface on the user’s system. Further, the user’s browser is redirected to more harmful sites harboring malicious files that automatically execute on the infected system.
Among the malicious files that are downloaded and executed are FakeAlert Trojans, which display a fake message stating that the system is infected with various viruses and that the user should buy a product to remove them.
I suggest you avoid installing anything that results from clicking video links related to any Christmas greetings.
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