FBW, the malware part is a generic reference. The
JS ought to indicate that the virus is delivered by a scripting language -javascript - but java viruses have also been so-named.
You might want to contact Trend Micro and ask them why they dropped this pattern. See
http://www.antivirus.com/vinfo/virus...Name=JS_PLAY.A
You didn't mention which virus checker you used. If you have not already deleted the malware then you might want to send it to mcafee or symantec. I don't use either of their checkers but they have always cheerfully looked at the samples I have sent them. Frisk in Iceland is especially helpful. HTH