January Top 10 malware activity from Fortinet

Top 10 malware activity by individual variant. Percentage indicates the portion of activity the malware variant accounted for out of all malware threats reported in this edition. Top 100 shifts indicate positional changes compared to last edition's Top 100 ranking, with "new" highlighting the malware's debut in the Top 100.
Rank Malware Variant Percentage Top 100 Shift
1 Spy/OnLineGames 8.8 +2
2 W32/Netsky!similar 8.2 -
3 W32/Virut.A 7.4 +3
4 HTML/Iframe.DN!tr.dldr 7.1 +1
5 HTML/Iframe_CID!exploit 6.9 -1
6 W32/Dropper.VEM!tr 5.4 +94
7 W32/MyTob.BH.fam@mm 3.7 +3
8 W32/Small.AACQ!tr.dldr 2.6 -1
9 W32/MyTob.AQ@mm 2.1 +6
10 W32/Basine.C!tr.dldr 1.9 -2
Source: http://www.fortiguardcenter.com