Scareware

What is Scareware?

"Basically, scareware, also known as rogueware or put in simple terms, fake security software, is a legitimately looking application that is delivered to the end user through illegal traffic acquisition tactics starting from compromised web sites (Sony PlayStation’s site SQL injected, redirecting to rogue security software), malvertising (MSN Norway serving Flash exploits through malvertising; Fake Antivirus XP pops-up at Cleveland.com; Scareware pops-up at FoxNews; Ukrainian “Fan Club” Features Malvertisement at NYTimes.com), or blackhat search engine optimization (9/11 related keywords hijacked to serve scareware; The most dangerous celebrities to search for in 2009; The Web’s most dangerous keywords to search for), to ultimately attempt to trick the user into believing their computer is already infected with malware, and that purchasing the application will help them get rid of it."

Source: ZDNet

This is just a heads up for those not aware of this issue. There have been a few reports on Thaivisa of getting hit by this.