According to Microsoft, the top threat for 2007 is the growing number of botnets out there that criminals can leverage:
If there's one thing that Aaron Kornblum would like to quash, it's the botnet armies.
These are the remote-controlled PCs that have been taken over without their user's knowledge. Symantec Corp. counted more than 4.5 million of them during the first six months of the year, and according to Kornblum, they are the backbone of today's cybercrime.
"Botnets are really where it's at for serious cyber criminals, because of their concentrated power," said Kornblum, a senior attorney with Microsoft Corp.'s Internet Safety Enforcement team. "That power can be used for all sorts of malicious conduct on the Internet."
There's a huge market out there for anti-malware software. So many PC's out there don't even have the most basic anti-virus and anti-spyware protection. Really, they shouldn't be connected to the net.