From: Martin Jr., D. Michael (martinmmontevallo.edu)
Date: Wed Jan 28 2004 - 13:28:13 CST

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

The MyDoom/Novarg virus won't start utilizing port 80 until February 1st
when it attempts the denial of service on SCO.com. (See other related
email.) But that does, however, pose an interesting question...

Does anyone have a signature for detected the actual infection of
systems?

I have seen this one:
alert tcp any any -> any any (msg:"MyDoom"; content: "respresented in
7-bit ASCII"; nocase; sid: 1000569; classtype: Possible-VIRUS;)

BUT, according to NAI (http://vil.nai.com/vil/content/v_100983.htm) and
Symantec
(http://securityresponse.symantec.com/avcenter/venc/data/w32.novarg.amm
.html) there are many variations on the infection algorithm. This one
apparently only looks for SMTP traffic with "represented in 7-bit ASCII"
in the packet.

Suggestions?

D. Michael Martin, Jr.
Network Administrator
University of Montevallo

-----Original Message-----
From: samneuroflux.com [mailto:samneuroflux.com]
Sent: Monday, January 26, 2004 4:48 PM
To: Joe Stewart
Cc: samneuroflux.com; snort-sigslists.sourceforge.net;
snort-userslists.sourceforge.net
Subject: [Snort-users] Re: [Snort-sigs] New Worm / Virus -
WORM_MIMAIL.R?

Interesting. None of our machines so far that have been infected are
trying to contact sco.com on port 80. I'm curious if there are multiple
varients??

We have identified this virus as the MyDoom/Novarg, and Symantec did
confirm our submission as such.

> On Monday 26 January 2004 4:42 pm, samneuroflux.com wrote:
>> All:
>>
>> We are experiencing what appears to be a new varient of the MIMAIL
>> virus. We've had several machines infected now, and I've created a
>> quick signature:
>
> Although Mimail.Q did also come out today, what you're describing is
> Mydoom/Novarg, which is spreading more rapidly than Mimail from the
> looks of it. Details from the AV companies are sketchy at this point,
> but, aside from spreading via SMTP and KaZaA, the copy I looked at
> appears to start up 63 threads all requesting the index page of
> www.sco.com every 300 milliseconds.
>
> -Joe
>
> --
> Joe Stewart, GCIH
> Senior Security Researcher
> LURHQ http://www.lurhq.com/
>
>

-------------------------------------------------------
The SF.Net email is sponsored by EclipseCon 2004
Premiere Conference on Open Tools Development and Integration
See the breadth of Eclipse activity. February 3-5 in Anaheim, CA.
http://www.eclipsecon.org/osdn
_______________________________________________
Snort-users mailing list
Snort-userslists.sourceforge.net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://www.geocrawler.com/redir-sf.php3?list=snort-users

-------------------------------------------------------
The SF.Net email is sponsored by EclipseCon 2004
Premiere Conference on Open Tools Development and Integration
See the breadth of Eclipse activity. February 3-5 in Anaheim, CA.
http://www.eclipsecon.org/osdn
_______________________________________________
Snort-users mailing list
Snort-userslists.sourceforge.net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://www.geocrawler.com/redir-sf.php3?list=snort-users

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]