When a computer user enters a legitimate website which shows ads from compromised networks their browser will be redirected to attack websites which uses security vulnerabilities to install fake anti-viruses or Trojans on their machines. In the recent attack computers were infected with Smart Fortress 2012 - a fake antivirus program which comes from the same family as Security Shield.
When installed on your computer these rogue programs will imitate a security scan and then will show a big list on supposedly detected security threats on your computer. These bogus antivirus programs are designed to scare computer users into thinking that their computers are infected and then selling them a licence to remove the detected security threats. Fake antivirus distribution is a very profitable business for Internet criminals and compromising of ad networks enables them to reach a high volume of computer users. To protect your computer from such attacks you should use a legitimate security program with On-Access Scanning features such as Malwarebytes Antimalware or Spy Hunter.
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- Department of Justice MoneyPak Virus
- Win 7 Antivirus 2013
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- Metropolitan Police ransomware (PCeU) virus
- Police Central E-Crime Unit Virus
- Internet Security "designed to protect" Scam - Fake Antivirus Program