Microsoft has released it's Security Intelligence Report for July through December. There are some interesting conclusions in this report such as
During 2H07 the MSRT proportionally cleaned malware from 60% less Windows Vista-based computers compared to computers running Windows XP Service Pack 2.
Similarly, the MSRT proportionally cleaned malware from 87% less Windows Vista-based computers than from computers running Windows XP with Service Pack 1 installed, and 91.5% less than from computers running Windows XP without any Service Pack
The most significant statistic in this report however is the increase in the number of Trojans.
During the second half of 2007 there was a 300% increase in the number of trojan downloaders and droppers detected and removed. The increase observed in 2H07 is vastly larger than the already large increase observed between 2H06 and 1H07. Clearly this category of malware has become a tool of choice for some attackers. IT Professionals and Security Professionals alike should become familiar with this type of malware so that they can better protect their networks from attacks that leverage it.
Be careful everyone and make sure your anti-virus is up-to-date and you do not open email attachments or visit sites you do not trust or know.