This attack could pose a serious security threat. You should take immediate action to stop any damage or prevent further damage from happening.
This signature will detect attempts to exploit a remote code execution vulnerability in Microsoft Windows.
Microsoft Windows is prone to a remote stack-based buffer-overflow vulnerability in the Windows Graphics Rendering Engine because the software fails to perform adequate boundary-checks on user-supplied data.
An attacker can exploit this issue by enticing an unsuspecting user to open a malicious '.MIC' or office file.