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From: lists at onryou.com (Cael Abal)
Subject: RE: Probable new MS DCOM RPC worm for Windows

> I'm thinking that there *has* to be a variant of Nachi/Welchia in the
> wild.  We have machines that were patched for MS03-026 (verified by
> scanning with multiple scanners) but not patched for MS03-039 (ditto)
> and they have been infected by something that triggers my Nachi rule in
> snort.  This should *not* be possible with the "original" Nachi/Welchia,
> so my assumption is that either something new has been released or the
> worm has mutated somehow.
> 
> Mind you, this is anecdotal and a very small incidence (only three
> machines so far), but it still bears watching IMHO.  I've been surprised
> to not see any discussion on the lists about a new variant.  Perhaps no
> one is looking?

Hi Paul,

Did you use a third-party tool to verify the patches were actually 
successfully installed on the infected machines, before detecting the 
infection?

Cael


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