Re: RE: Probable new MS DCOM RPC worm for Windows

["Paul Farrow" <pfarrow () flamenetworks co uk>]

Its likely just everyone getting back to work from the weekend... logging
into their systems and boom... big surge.
----- Original Message ----- 
From: "Williams Jon" <WilliamsJonathan () JohnDeere com>
To: <rnews () river com>; <full-disclosure () lists netsys com>;
<incidents () securityfocus com>
Sent: Thursday, September 25, 2003 2:01 PM
Subject: [Full-disclosure] RE: Probable new MS DCOM RPC worm for Windows


> Since I've been watching for a new worm that uses the MS03-039
vulnerability, when I saw this message, I went over to incidents.org to
check out and see if they were seeing an increase, too.  Lo and behold,
their charts for both TCP 135 and TCP 80 show dramatic increases  in traffic
over the past few days.  Port 135 is up from 377,000 targets on 9/20 to
1,900,000 targets on 9/23, and 80 is up from 880,000 records on 9/20 to
3,527,000 on 9/23.  Despite this, I'm not seeing anything else on the lists
about a new worm.
> Is anyone seeing anything new out there, or is this just a resurgence of
Welchia?
> -----Original Message-----
> From: Richard Johnson [mailto:rnews () whirlpool river com]
> Sent: Wednesday, September 24, 2003 10:03 AM
> To: full-disclosure () lists netsys com; incidents () securityfocus com
> Subject: Re: Probable new MS DCOM RPC worm for Windows
>
>
> On Sat, 20 Sep 2003 14:41:39 -0600,
>  Richard Johnson <rdump () river com> wrote:
>
> > We've noticed increased scan activity on port 135, ramping up over the
> > past 20 hours.
> >
> > The scanning appears to concentrate on nearby /16s...
>
>
> We finally had infections occur on Tuesday evening showing the same
> scan behavior.  Sysadmins doing cleanup report Norton and McAfee IDed
> the bug as W32.Welchia.
>
> I don't know whether it was a variant using one of the two new RPC
> holes, or just month-old Welchia. That's because the hosts hit were
> traditional non-compliant lab machines and non-adminned remote office
> or home hosts.  In other words, they were still vulnerable to the
> original blaster worm.
>
> The US Dept. of State's CLASS was hit by this one, and it looks like
> they shut down for a short while to contain it:
>
> http://www.azcentral.com/news/articles/0924ComputerVirus24-ON.html
>
>
> Richard
>
> -- 
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