muff.exe is a W32/Sdranck-T. muff.exe spreads via open network shares. muff.exe tries to terminate antiviral programs installed on a user computer. Related files: %SYSTEM32%\muff.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill muff.exe process and remove muff.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.