Microsoft's threat research and response center is now available to the public over at http://www.microsoft.com/security/portal/. You can get detailed analysis of various threats, query their extensive library and even download definition updates out of band for Defender or Forefront in both x86 and x64 format.
- Access to Microsoft's malware encyclopedia
- Download Microsoft's antivirus and/or antispyware signatures
- Threat and Potentially Unwanted Software Telemetry
- Tools and Resources
- Microsoft Security Intelligence Report
Source:? SilverStr's Blog
Microsoft, Malware, Protection Center, Microsoft News