Backdoor.Perl.Shellbot.F aka VBS:Malware-gen not detected by avast

Malware resides here: htxp://ipohshop.com/mesum.jpg??

http://www.virustotal.com/file-scan/report.html?id=9acf4e20b59aef5453f01588fdf1ed79022597b806e15d5acee48565cccb3823-1300928792

Missed here: http://wepawet.iseclab.org/view.php?hash=68a77604739d6a4ea4b2c834f5853929&t=1301599296&type=js

See attached malzilla active screendump
In the past detection rate was also low 4 instances of this VBS:Malware-gen missed by avast detection in the past,e.g. this example:
http://www.virustotal.com/file-scan/report.html?id=e4dce0a7eb31b03c52d8b563e3d62f5e301f2ece474d455a08b7b75389374ddc-1269251042
etc. only this one exemplar was found
http://www.virustotal.com/file-scan/report.html?id=441c03e28201b24e66d735b7c1a7bd3f6da9acf7d9da18233ccb3932ecf3f7c9-1251817307

re: http://bugbopper.com/namelookup.asp?name=perl_shellbot_y

polonus