what www perl script is running?

[Ruben de Groot]

On Tue, Aug 25, 2009 at 06:16:49AM -0700, Colin Brace typed:
> 
> 
> Bill Moran wrote:
> > 
> > You can add an ipfw rule to prevent the script from calling home, which
> > will effectively render it neutered until you can track down and actually
> > _fix_ the problem.
> > 
> > In reality, good security practice says that you should have IPFW (or some
> > other firewall) running and only allowing known good traffic right from
> > the start, which might have protected you from this in the first place.
> > 
> 
> Bill,
> 
> I am surprised you would think I have no firewall. As long as I have had the
> server (2 years), I have had PF installed and running, and I can tell you
> exactly which incoming ports I have open to the net:
> 
> tcp_services = "{ ssh smtp www https 4661 4662 52550 }"

But are you blocking any outgoing traffic?

> wifi_tcp_services = "{ ftp ssh bootps whois domain www imap imaps ntp irc
> https sunrpc dict nfs 2628 3689 4711 6667 6909 23398}"
> 
> Should I entertain the possiblity that someone parked their car near my
> house and hacked in through one of the above ports?

That's certainly possibly. But not my first guess.

> Any suggestions as to where to start looking for the breach would be most
> welcome; I am quite new to this game.

My guess (not much more than that) is that someone used a vulnerable web page,
maybe some perl or php application that was exploitable. This because the 
rogue process was running as user "www".
Try a find through the entire filesystem for files owned by this user that 
you can't account for. Also check your cron and at files under /var/cron and
/var/at
And try to find out what's starting the proces whith ps -alx, tracking the 
PPIDs.

gooed hunting!