Trojan:JS/IframeRef.EX is a detection for a trojan that redirects your browser to other sites. These sites may attempt to download and install malware onto your computer, often by exploiting software vulnerabilities.
Make sure you install all available updates for your computer to help prevent the downloading of more malware. For more information on updating software, including Java, Adobe and Microsoft products, please see the Additional information section in this entry.
When you visit a website that contains this threat your browser is redirected to another website that may attempt to download and install malware onto your computer. The malware could be any of the attacker's choice, and is typically downloaded onto your computer by exploiting software vulnerabilities.
In the wild, we have observed this threat redirecting to a large list of malicious URLs, including the following:
Software vulnerabilities are fixed through the application of updates or patches from the software manufacturer.
The best way to protect your computer from exploits is to ensure that the versions of your software are up-to-date. Follow these links for more information on updating software that is commonly targeted by malware:
Analysis by Chris Stubbs
Alerts from your security software may be the only symptom.