Re: LaBrea escalates event volume

[Bill McCarty <bmccarty () apu edu>]

Hi Chris,

Ahh! I see where I've failed to explain fully.

LaBrea is tricky. Its phantom hosts _do_ complete a 3-way TCP handshake 
with an attacker. So, even though these IPs have no associated web server, 
an attempt to connect to port 80 -- or whatever port the attackers is using 
-- via TCP succeeds. That's why I'm able to inspect the logged packets.

Cheers,

--On Monday, March 18, 2002 11:13 PM -0500 Chris Green <cmg () sourcefire com> 
wrote:

> Bill McCarty <bmccarty () apu edu> writes:
>
> > Hi Chris,
> >
> > I don't think that the port 80 stuff is CodeRed or similar. Here's why.
> >
> > When I turn off my custom rules, I don't get all that many
> > alerts. However, I do get an occasional CodeRed. I conclude that, if
> > the packets were CodeRed, I'd continue getting a high volume of alerts
> > when I turn off my custom rules. But, the volume goes down by a order
> > of magnitude. So, I figure they're not CodeRed. Does that make
> > sense?
>
> Do these machines have webservers on them?  If they don't, you're not
> going to see the successful TCP connections.. Though if they do have
> webservers, I have no answer.

---------------------------------------------------
Bill McCarty

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