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 detects attempt to exploit a file overwrite vulnerability by passing specially crafted arguments into a method of Zune software ActiveX Control.
An arbitrary file overwrite as been discovered in an ActiveX control installed with the Zune software package.
If a user visits the malicious page and authorize the control to run (it is not marked safe for scripting), the attacker can erase an arbitrary file.