Microsoft recently updated procedures for submitting suspicious entries for evaluation as follows:

Microsoft – How to submit suspicious malware entries

QUOTE: When you suspect that a file or a program is malicious, you can send the file to the Microsoft Research and Response team for analysis. Malicious files or programs (malware) may include viruses, spyware, worms, and adware.  You can use one of the following methods to send malware files to Microsoft for analysis:  

* Web-based submission
* Submission by Microsoft Customer Support Services
* Prompted Submission