full-disclosure - Re: Weird traffic

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Message-ID: <16b4f01e0902250857m308e34cavd196affac17a3821@mail.gmail.com>
Date: Wed, 25 Feb 2009 10:57:58 -0600
From: B Null <bnull@...enseindepth.com>
To: julio sanchez <pete.sanches@...il.com>
Cc: full-disclosure@...ts.grok.org.uk
Subject: Re: Weird traffic

Can you provide a pcap with the suspect traffic isolated?  Also, what
alerted you to the odd behavior?  Did the traffic flag an IDS alert?

bNull

On Wed, Feb 25, 2009 at 9:27 AM, julio sanchez <pete.sanches@...il.com>wrote:

> Hi,
>
> We're experiencing some weird arp traffic on our network, some box scan
> constantly the subnets with loop "who-has" request
> All the box are all windows vista sp1 fully patched.
> We did format all the  supect box, and isolate them on a vlan, to reinstall
> vista, updates, kaspersky, then we put it back on the network, and still
> some ramdom freshly formated box scanning the network.
> We find out that Vista will do an arp scan when it search for a network
> printer, but it does this once.
> The problem we have is an almost permanent arp scan on various boxs.
> We know that some worm was hitting some network around the world with the
> smb vulnerability, but all of our boxs are fully updated.
> Have you experienced something like this before, or it seems to be legit
> traffic ?
> Can this be a worm or something related ?
>
> Thanks in advance
>
> Pete
>
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