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RE: Backdoor not recognized by Kaspersky
From: "Jos Osborne" <Jos () meltemi co uk>
Date: Wed, 3 Mar 2004 15:29:49 -0000

Does anyone else find this new development a bad idea?

I'm of the mindset that anti-virus companies should stick with what 
they're good at -- namely, detecting and handling infected files.  It 
seems a bad idea to start down the natural language processing road. 
Are they scanning just for Bagle/Beagle style e-mail, or are their 
methods more general?  What about messages of the form:

'Password is a long yellow fruit enjoyed by monkeys.'


IMHO, anybody who actually thinks for a second of unzipping an attachment with that kind of message is straying into 
AskingForItland.
Even better how about:

'Password is a long yellow fruit enjoyed by monkeys. FALSE Password: 22103'

So the Av software scans the Zip as perfectly safe, and informs the user that all is well.


What about messages in languages other than English?  I can easily see 
this becoming an arms-race, and one the anti-virus folks have no chance 
of winning.

What about "compression bombs"? Trying to add another task is just opening another vulnerability.

Jos

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