"Security experts are warning about a stealthy Windows virus that steals login details for online bank accounts. In the last month, the malicious program has racked up about 5,000 victims – most of whom are in Europe. Many are falling victim via booby-trapped websites that use vulnerabilities in Microsoft’s browser to install the attack code.
Experts say the virus is dangerous because it buries itself deep inside Windows to avoid detection." BBC NEWS | Technology | Warning on stealthy Windows virus