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Re: Weird traffic
From: julio sanchez <pete.sanches () gmail com>
Date: Wed, 25 Feb 2009 12:50:25 -0500

No IDS alert yet.
What alerted us was the constant ARP loop scan on various vista sp1 box
while we was monitoring the network
I'll send a pcap in one hour or twoThanks
2009/2/25 B Null <bnull () offenseindepth com>

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 () gmail 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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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

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