Qualys is set to launch on Monday a free service for Web site operators that will scan their sites for malware.

From next Monday on, Qualys will be ready to start a free service that will check web sites for malicious software. The new services will be useful for web site administrators. The task of Guard Malware Detection is to observe the pages of customer sites and looks for invisible iframes, malicious javascript code, and other indications of a stealth threat to visitors and provides automated alerts and reports to Web site owners.

According to Wolfgang Kandek, chief technology officer at Qualys, the company has tested Internet Explorer 6 and Adobe's Acrobat, Reader, and Flash Player to understand exactly what happens under normal conditions so it can quickly find deviations that occur when malicious software is present. Kandek added that some other applications are to be analyzed soon because think consider them to be a typical target for attackers.

Thanks to Dasient Google offers a free service that alerts Web sites when they appear on malware blacklists and a paid service that detects and quarantines malware on sites.