Full Disclosure mailing list archives

RE: Mydoom


From: Nick FitzGerald <nick () virus-l demon co uk>
Date: Wed, 28 Jan 2004 18:37:42 +1300

madsaxon <madsaxon () direcway com> to me:

That page does not specifically address the "zip attachment" form at
all, and to the extent that it does mention .ZIP extensions it (_quite_
incorrectly) implies that the virus' executable is simply packaged with
such an extension.  In fact, if it sends itself with a .ZIP extension,
Mydoom sends itself as a proper zip archive that contains a "stored"
(i.e. not compressed) copy of its executable.

Two of the copies I've gotten have been proper .zip archives (with
.zip extension) which contained a UPX compressed executable,
many of whose ASCII strings were further obfuscated with ROT-13.

Dude, read what I said...

   ...if it sends itself with a .ZIP extension...

That is, of the options it has for sending itself, if it chooses the 
the zip archive option...  

Keep up with the program!


-- 
Nick FitzGerald
Computer Virus Consulting Ltd.
Ph/FAX: +64 3 3529854

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html


Current thread: