13 Feb
2001
13 Feb
'01
4:46 p.m.
From: "Bill Stewart" <bill.stewart@pobox.com>
The trick with double extensions is that after Explorer or Outlook hides the .VBS, the user sees the ".JPG" and says "Oh, this is a picture, I'll click on it", instead of "Hmmm, this is something I don't recognize, better leave it alone." Similar tricks are used for .doc.vbs, .xls.vbs, .txt.vbs, etc.
Using Outlook Express 5 here, and nothing is hidden. Both extensions (.jpg.vbs) are shown on this attachment.