SWF.LFM.926 is a Flash infector, infecting Macromedia Flash files with SWF extension.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
This is the first virus of its kind. However, it is not an urgent threat as the virus can not jump from a web page to an end user machine during normal surfing. The only way it can succesfully spread is that the SWF file is downloaded manually, placed to a directory which contains clean SWF files and then executing the file with Macromedia Flash Player.
SWF.LFM.926 uses the Macromedia Flash's ActionScript scripting system to spread. While infecting other files, it shows a display saying "Loading Flash Movie".
SWF.LFM has not been found in the wild. It is not considered to pose any threat at the moment. Nevertheless, it's the first virus of its kind.
[Mikko Hypponen, F-Secure Corporation, January 8th, 2002]