[THIN] Re: OT: Security response to BAGLE virus (passwordprotected .zips)
- From: "Evan Mann" <emann@xxxxxxxxxxxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Thu, 4 Mar 2004 09:53:04 -0500
Exchange itself only has the ability to block a maximum size attachment.
Most Exchange AV products have basic filtering abilities for file sizes,
attachment names, etc. This is what people are using, or some other
gateway product. Unfortunately, there is little you can do with
Exchange itself, aside from block any attachment over some ridiculously
small size.=20
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Berger, Gunnar
Sent: Thursday, March 04, 2004 9:37 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT: Security response to BAGLE virus
(passwordprotected .zips)
I use Exchange 2000, is there an easy way to block all zip files and to
=3D do this minimum size limit stuff?
Gunnar
-----Original Message-----
From: Evan Mann [mailto:emann@xxxxxxxxxxxxxxxxxxxxx]
Sent: Thursday, March 04, 2004 9:22 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT: Security response to BAGLE virus
(passwordprotected .zips)
Blocking the specific filename attachments that Bagle and it's variants
use. These are documented by SARC and others. This lets me accepts
legit .ZIPs but not the virus. This is a short term option as I expect,
very soon, a variant (or new virus) that randomly generates encrypted
.ZIPs.=3D3D20
Some people on Focus-VIRUS mailing list are blocking attachment under a
certain size. Others block .ZIP entirely. The only methods are
filtering methods. No AV scanning products can pick up the virus itself
inside a password protected ZIP. The AV companies need to come up with
something quick! =3D3D20
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
Behalf Of Andrew Rogers
Sent: Thursday, March 04, 2004 9:02 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: OT: Security response to BAGLE virus
(passwordprotected .zips)
We've got Clearswifts Mailsweeper here, and have blocked (well, ok,
mailswe=3D3D3D eper distribute lists) all the phrases that the worms =
use.
We've also got s=3D3D3D ize limits set on the attachments, so we can =
stop
=3D =3D3D all attachments of type x=3D3D3D under size y!
Andrew
--o--
>>> BClaus@xxxxxxxxxxxxx 04/03/04 13:28:12 >>>
Just wondering what others are doing to combat the latest BAGLE worm.
=3D3D3D3D It's password protected so standard AV won't scan into it. =
How
=3D is =3D3D3D3D everyone else handling delivery of .zip files now?
We're using the Trend Micro AV suite.
Do you think the latest password protected BAGLE worm has caused the =
=3D3D
=3D3D3D3D demise of password protected .zip files?
My immediate opinion in the matter is that password protected .zip files
=3D3D3D3D will now be treated with the same delivery restrictions that =
the
.exe, =3D3D3D3D .scr, .pif, .vbs have come under but I'm not aware of =
any
=3D AV software or =3D3D3D3D other means to differentiate scanning =
options =3D
between p\w protected .zip =3D3D3D3D files and non p\w protected .zip
files.
Thanks,
=3D3D3D3D20
_____ =3D3D3D3D20
=3D3D3D3D20
Brian Claus, A+, Network+, MCP
Network Administrator
WESCO Distribution, Inc.
225 West Station Square Drive, Suite 700 Pittsburgh, PA 15219-1122
Phone: 412-454-2412
Fax: 412-454-2540
bclaus@xxxxxxxxxxxxx <mailto:bclaus@xxxxxxxxxxxxx>=3D3D3D3D20
_____ =3D3D3D3D20
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