Koobface Virus targeting Facebook
Friday, December 5th, 2008There is a worm spreading quickly though Facebook called Koobface. Like most worms, it seems innocent enough. It appears to come as a message from a friend with a subject line about a new video or something similar. When opened and the video is clicked to play, a message appears that says the newest version of Flash Player is not installed, but needs to be.
However, the file that is actually downloaded is not a new version of Flash Player, but malware. When the link on the fake Flash site is clicked, it downloads malware called tinyproxy.exe. This file loads to a proxy server called Security Accounts Manager. The server will run next time the computer is rebooted, loading and listening to traffic on TCP port 9090 and all outgoing HTTP traffic. In doing this, it tries to obtain sensitive data from your computer, including credit card numbers. Koobface also sends infected users to bogus search engines sites when he or she tries to connect to Google, Yahoo, MSN, or Live.com.
Facebook is telling users who have been affected that they should run an anti-virus program and change their Facebook password immediately. Anti-virus and security leader McAfee has warned users that while Facebook is working on the problem, there are many variants of Koobface and that “the situation is likely to get worse before it gets better.”
While it is not known how many of the 120 million Facebook users have been affected by the virus, Facebook is also pro-actively resetting some passwords, then sending users emails notifying them of the possibility of a virus.
As always, it is best to avoid any messages with downloads or attachments unless it is know that it came from a trusted source.