The results of an analysis performed by ESET's ThreatSense.Net®, a sophisticated malware reporting and tracking system, is contained in this paper. It shows that the highest number of detections this month, with almost 8.76% of the total, was scored by the Win32/Conficker class of threat.
More detail on the most prevalent threats is given in the paper, including their previous position (if any) in the "Top Ten" and their percentage values relative to all the threats detected by ThreatSense.Net®. This document also explains what these threats mean to the end user.