ok...
Bellow is the screenshot of a worm that I had created last year (using
VB)... expected to let it spread in the university ... But not did ... because pehlay hi log viruses say preshan hain ... hahaha
Do you want to try it? hahaha
ok, now see the attached image ... the virus file has icon of Media Player File ... Victim will think that it is a music file (chalo yeh wala song hi sun laitay hain) ...
But if you have switched the view to details you can easily distinguish that it's an application not any Media Player File...
also one more clue is to show the extensions of files (in this case you don't need to switch to details view you can just distinguish files with their extensions...)