AppletX.class Java:Agent-B

Avast found AppletX.class tojan Java:Agent-B. Anyone know what this is? My Java is up-to-date and my malware scan did not find this.

Thanks,

VFN

Since none of the antivirus vendors is using the same name it is difficult to fiend the exact one
java malware is to my knowledge from infected websites

http://www.microsoft.com/security/portal/Threat/Encyclopedia/Search.aspx?query=Java:Agent
http://www.viruslist.com/en/viruses/encyclopedia

Script Viruses
Script viruses are a subset of file viruses, written in a variety of script languages (VBS, JavaScript, BAT, PHP etc.). They either infect other scripts e.g. Windows or Linux command and service files, or form a part of multi-component viruses. Script viruses are able to infect other file formats, such as HTML, if the file format allows the execution of scripts.