lass.exe is a Trojan.Feutel-AS. lass.exe opens a back door. lass.exe monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %Windows%\lass.exe %Windows%\lass.dll More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill lass.exe process and remove lass.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.