Koobface spreads by sending notes to friends of someone whose PC has been
The messages, with subject headers like, "You look just awesome in this new
movie," direct victims to a third-party site where they are asked to download
what it claims is an update of Adobe's Flash player.
Downloading the software means that users end up with an infected computer,
which then takes users to contaminated sites when they try to use search engines
from Google, Yahoo, MSN and Live.com, according McAfee.