writes "It has recently been reported that people are seeing a fake Firefox "Just Updated" page which pushes you to install an update to Flash. The page is roughly a clone of the page you see in Firefox after you update versions. It uses a recent (but not the most recent) update version, and tells the user that they really should update their Flash version. Presumably you'd see this even in another browser. The download starts automatically. Save and run it and you get a rogue antivirus product named "SecurityTool" which starts finding threats which aren't there and demanding payment in order to remove them."