Hi malware fighters,
According to the results of the AusCERT 2006 computer crime survey, even though 98 percent of companies used an antivirus product, almost half of them experienced a virus infection over the past year.
Read more here:
http://www.zdnet.com.au/news/security/soa/Antivirus_software_is_being_defeated_/0,2000061744,39257227,00.htm
So we need multi-layered defense. We know or have strong suspicion that some malware is been tested before launching that AV scanners do not detect it.
polonus