[Esa-l] Re: Idea: Multiple extension detector

[John D. Hardin]

On Sat, 10 Jun 2000, Brett Glass wrote:

> This week, some skript kiddies attempted to spread a Trojan by
> disguising it as a movie file (.mpg.exe or .avi.exe, depending on
> who you ask). This suggests that a sanitizer should probaby detect
> such "double extensions" and treat them with extreme prejudice....

Not so new. All of the .VBS worms were written that way too.

Interesting idea. I don't think the current version could do it too
well, but there's a simple way to put that into your poisoned-files
list, assuming you don't want to poison *all* .EXE attachments:

   *.[a-z0-9]+.exe

I'll add that to the recommended list on the home page.

Thanks.

--
 John Hardin KA7OHZ   ICQ#15735746   http://www.wolfenet.com/~jhardin/
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