Re: [Snort-users] Help with a particular alert

There is no way for us to tell if it is a false positive without actual
packet data. Just X out the IPs and post it.

Scott


Paul Martin wrote:

> Ok, this is really bugging me. I've got 2 systems on our network that
> are continually spewing out something that's tripping this rule:
>
> Sep 17 08:19:55 hgvsnort snort: [1:2382:13] NETBIOS SMB DCERPC NTLMSSP
> asn1 overflow attempt [Classification: Attempted Administrator
> Privilege Gain] [Priority: 1]: {TCP} <IP address A>:2622 -> <IP
> address B>:139
>
>
> I'm familiar with the ASN1 overflow attack, which is why I'm little
> nervous that I'm seeing it on my network. Now, both <IP address A>
> and <IP address B> are internal IPs. And <IP address B> is always one
> of 3 systems: both DNS servers, and a random client. They've got the
> most current anti-virus and have been scanned for spyware. What is it
> that I'm missing? Could it be a false positive? I don't really think
> it is, but I'm open to suggestion at this point.
>




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