CoolNotepad is an email worm that propagates through both Microsoft Outlook and mIRC, similar to the LoveLetter worm. The infection will start with the user receiving an infected email that may look like this: Cool Notepad Demo Hey check out this text file I sent it will do something neat in notepad. Enjoy :) COOL_NOTEPAD_DEMO.TXT.vbs As common file extensions are hidden by default, the user will simply see "COOL_NOTEPAD_DEMO.TXT", and thus believe it to be simply a text document, and thus may open it without suspecting it to be malicious.