[Full-Disclosure] Re: Probable new MS DCOM RPC worm for Windows

[Richard Johnson <rnews@xxxxxxxxxxxxxxxxxxx>]

On Sat, 20 Sep 2003 14:41:39 -0600,
 Richard Johnson <rdump@xxxxxxxxx> 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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