Trojan:JS/Agent.FA Also Known As: Trojan-Downloader.JS.IstBar.ax VBS/IstBar JS/ForcePopup Trojan.Clicker.CM
Summary Trojan:JS/Agent.FA is malicious Javascript embedded in a Web page. The Javascript is designed to circumvent popup blocking by security applications.
Symptoms The presence of one or more popup windows that bypass installed popup blockers may be indicative of a Web page hosting
Technical Information Trojan:JS/Agent.FA is malicious Javascript embedded in a Web page. The Javascript is designed to circumvent popup blocking by security applications, including popup blockers from Google Toolbar, Internet Explorer, and Norton Internet Security. The malicious popup could allow site redirection which could lead to possible downloading and executing of further malicious files.
Steps Take the following steps to help prevent infection on your system: Get the latest computer updates. Use up-to-date antivirus software. Use caution with attachments and file transfers. Enable a firewall on your computer Use a third-party firewall product or turn on the Microsoft Windows XP Internet Connection Firewall. To turn on the Internet Connection Firewall in Windows XP Click Start, and click Control Panel. Click Network and Internet Connections. If you do not see Network and Internet Connections, click Switch to Category View. Click Change Windows Firewall Settings. Select On. Click OK. To turn on the Windows Firewall in Windows Vista Click Start, and click Control Panel. Click Security. Click Turn Windows Firewall on or off. Select On. Click OK. Get the latest computer updates Updates help protect your computer from viruses, worms, and other threats as they are discovered. You can use the Automatic Updates feature in Windows XP to automatically download future Microsoft security updates while your computer is on and connected to the Internet. To turn on Automatic Updates in Windows XP Click Start, and click Control Panel. Click System. Click Automatic Updates. Select a setting. Microsoft recommends selecting Automatic. If you do not choose Automatic, but you choose to be notified when updates are ready, a notification balloon appears when new downloads are available to install. Click the notification balloon to review and install the updates. Use up-to-date antivirus software Most antivirus software can detect and prevent infection by known malicious software. To help protect you from infection, you should always run antivirus software that is updated with the latest signature files. Antivirus software is available from several sources. Use caution with attachments and file transfers Exercise caution with e-mail and attachments received from unknown sources, or received unexpectedly from known sources. Use extreme caution when accepting file transfers from known or unknown sources.
Sunday, 4 October 2009
