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Sneakiest Computer Viruses



'Sinowal' Trojan
Horse

The next time you upload pictures from your birthday bash or post comments to your favorite social networking site, you may be doing more than putting your reputation on the line and online. You may also be exposing your bank account data to a pretty sneaky Trojan horse.

A Trojan horse called Sinowal, a variant of the Mebroot trojan we reported on back in January, has to date gathered details of more than 500,000 online bank accounts, and may be one of the most advanced and dangerous security risks on the Web, according to Internet security firms that track these sorts of things. The scary thing is that a user doesn't need to click on a pop-up window or do anything else traditionally seen as risky -- the Trojan downloads to the user's computer in the background automatically the minute a user clicks on an infected link.

While initially found mostly on random, unsecure Web sites, the Trojan is now finding its way to popular social networking sites like Facebook and MySpace, where it can sometimes be found in those random postings you get on your wall.

This so-called "drive-by" infection is just one of many cropping up all across the Internet, with as many as 1 in 10 sites showing some kind of malicious software risk, according to a Google estimate. How to protect yourself? Unfortunately, not much can be done other than being wary of clicking on anything that seems to random or unfamiliar on popular sites. You can also download a free copy of GMER, which purportedly gets rid of this menace.

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