RE: 543.rar attachment

[<adisegna () siscocorp com>]

When Symantec Corp. integrates with Active Directory to allow file
attachments by user/group then maybe. For now I only have the choice to
allow of block everything. I can't trust some of the non technical users
in my organization (marketing, accounting, etc). They ask "what is this"
and forward information to the admin every time they get something the
don't recognize. This is after being trained numerous times. They are
easy prey to socially engineered email.

Thanks
AD
Information Technology Group 

-----Original Message-----
From: Kinnell [mailto:kinnell.t () gmail com] 
Sent: Monday, March 14, 2005 10:13 AM
To: security-basics () securityfocus com
Subject: Re: 543.rar attachment

On the network I'm a member of we block all exe files sent inside the
rar or zip, so even if it is sent the file will be 0byted.  Wouldn't
that be a better method?  otherwise if you block all bz2, zip, rar,
etc... then you will block a lot of useful communication

-Kinnell

On Fri, 11 Mar 2005 16:49:16 -0500, adisegna () siscocorp com
<adisegna () siscocorp com> wrote:
> Sean, I have to disagree with you. Any file that that can encapsulate
an
> executable file should be blocked (IMO). ZIP files are one of the
> biggest carriers of malicious content these days. I don't make it a
> habbit of trusting my users no matter how many times they get trained.
> RAR extraction tools are not part of the software image policy on my
> network so users are oblivious to the file blocking. What is your
> solution?
>
> Thanks
>
> AD
> Information Technology Group
> Security Identification Systems Corporation
>
> -----Original Message-----
> From: Sean Crawford [mailto:sean01 () accnet com au]
> Sent: Tuesday, March 08, 2005 9:39 PM
> To: security-basics () securityfocus com
> Subject: RE: 543.rar attachment
>
> ---> -----Original Message-----
> ---> From: adisegna () siscocorp com [mailto:adisegna () siscocorp com]
>
> ---> Subject: RE: 543.rar attachment
>
> ---> I just recently got the same executable inside .rar. I extracted
> the
> ---> dddd.exe and ran a scan on it. Norton Corporate 9.01 didn't find
> ---> anything (as of 4 days ago). I wasn't about to double click this
> exe on
> ---> my corporate network. Block the rar extension on your mail
server.
> --->
>
> rar is a valid compression format...blocking it isn't a very good
> solution.
>
> 2 cents.
>
> Sean