RE: Incessant port 80 connections

["Philip J. Koenig" <pjklist () ekahuna com>]

On 19 Jul 2001, at 23:44, Marty Richards boldly uttered: 

> Hi Phil,
>  
> You've seen the writeups on the code red worm?
>
> http://news.cnet.com/news/0-1003-200-6604515.html?tag=tp_pr


Marty,

I heard about it, and read the link above just now.  What would be 
the connection here?  We don't run any webservers at that site. 
(especially not IIS, gack, I'd never be able to keep up with the
exploits :-)



> Date sent:            Thu, 19 Jul 2001 09:54:04 -0400
> From:                 "Jim Leo" <jleo () pcc pitt cc nc us>
>
> Is the internal user running 'Front Page' by any chance?


Not to my knowledge.  FYI, I did a "netstat -an" on this machine 
early-on and it's not listening on any unexpected ports, including 
port 80.



Phil


> -----Original Message-----
> From: Philip J. Koenig [mailto:pjklist () ekahuna com]
> Sent: Monday, July 16, 2001 10:10 PM
>
>
> Over the last few days at a site I manage someone has decided to 
> start sending incessant connection attempts on port 80 to an internal 
> workstation. (there are a few hosts that stay on 24x7 but they get 
> none of this)  I've done virus/trojan scans and nothing looks out of 
> place.
>
> It almost looks like a DDoS-type of attack in that there are 
> connections every minute or two from various random (but usually 
> resolvable) IP addresses on various ports, but all ending up at the 
> same destination IP on port 80.  However the firewall logs imply that 
> the connections aren't heavy enough to really be a DoS attack, they 
> just keep going on-and-on. (continually since Friday now)
>
> If this machine had a hostname that sounded like a webserver or 
> something it might make some sense, but it doesn't.  Is there some 
> common profile to this kind of event that is escaping me?  If it 
> weren't for the fact the sources appear spoofed and it fills up my 
> logs every day, I'd probably ignore it.



--
Philip J. Koenig                                       pjklist () ekahuna com
Electric Kahuna Systems -- Computers & Communications for the New Millenium

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