Re: [Full-Disclosure] Mystery DNS Changes

[Paul Tinsley]

Ya, there is a tiny line on page 3 of the security buleten that says 
that it doesn't fix the Object Type Vulnerability.  Awful nice of them 
to let people know...

Also they haven't commited to a date that a working patch will be 
available, end of October is the best I have heard.

To make it worse all the AV vendors are basing their signatures off of 
the AOLFIX.EXE instead of the behavior that allows the problem.  So v1.1 
will have no problem making it through the gates.

And Microsofts mitigation suggestions are to set ActiveX to prompt in 
the Intranet and Internet zones... right, cause end users aren't already 
trained to hit yes to every box that shows up.

Randal, Phil wrote:

NAI has this as QHosts-1, and says MS03-032 does NOT protect against it:

 http://vil.nai.com/vil/content/v_100719.htm

Cheers,

Phil

---------------------------------------------
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK 

 

-----Original Message-----
From: Joe Stewart [mailto:[EMAIL PROTECTED]
Sent: 01 October 2003 21:34
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: [Full-Disclosure] Mystery DNS Changes
On Wednesday 01 October 2003 03:19 pm, Hansen, Kevin wrote:
   

We have seen multiple instances where DHCP enabled workstations have
had their DNS reconfigured to point to two of the three addresses
listed below. Can anyone else confirm this? Incidents.org is
reporting an increase in port 53 traffic over the last two days. Are
we looking at the precursor to the next worm?
216.127.92.38
69.57.146.14
69.57.147.175
     

The top DNS server change was made by a newer variant of the 
Delude/Startpage trojan. It used to add bogus entries in the 
system32\drivers\etc\hosts file, but lately has begun to change the 
user's DNS registry settings as well. It hijacks the user's 
traffic to 
and from major search engines, redirecting it to a single webserver 
under the control of the trojan author. Any requested search 
pages have 
popup ads for gambling/porn site registration, presumably because the 
trojan author is getting money for registrations via affiliate 
programs.

It is being installed via the MS03-032 IE object tag exploit. 
A scan of 
the system may not turn up any infected files - this trojan does not 
run at startup, and deletes its files after the DNS/hosts 
configuration 
changes are complete.

-Joe

--
Joe Stewart, GCIH 
Senior Security Researcher
LURHQ Corporation
http://www.lurhq.com/
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