As organizations take part in the virtualization of malware testing, it is beginning to fail.The biggest issues in testing malware on virtual machines and other environments, is that viruses and other malware are equipped with a component that recognizes the presence of a virtual environment. They are coded to see what environment they are running in, to help mitigate being tested by analysts and researchers.

There are also ways for businesses to run virtual environments to test how a threat entered their networks, what vulnerabilities exist, etc.

Read more: http://secureconnexion.wordpress.com/2012/06/22/running-virtual-analysis-on-malware-is-failing-these-days/