have i been hacked?

[Dick Davies]

* Luke Kearney <lukek at meibin.net> [0459 06:59]:
> 
> On Wed, 14 Apr 2004 00:51:06 -0400
> "dave" <dmehler26 at woh.rr.com> granted us these pearls of wisdom:
> 
> > Hello,
> >     Wondering if a system on my network has been hacked?
> > ls: Terminated
> > : No such file or directory
 
> > guardian.davemehler.net setuid diffs:
> > 1,52d0
> > < 94240 -r-sr-xr-x  1 root  wheel     448384 Jun  4 21:54:47 2003 /bin/rcp
> > < 117807 -r-sr-x---  1 root  operator  421832 Jun  4 21:55:39 2003
> > /sbin/mksnap_ffs
> > < 117826 -r-sr-xr-x  1 root  wheel     451668 Jun  4 21:55:43 2003
> > /sbin/ping
> > < 117827 -r-sr-xr-x  1 root  wheel     463444 Jun  4 21:55:43 2003
> > /sbin/ping6

> My first suggestion is to have a look at what services are running that
> shouldn't be. A hacked box is not much use to anyone if they cannot use
> it.  Try sockstat -4 and see if there are unusual ( unusual for this box )
> services running such as iirc related services. Take a look at your mail
> logs and see if there is unusual mail traffic.

If the box has been taken, you can't trust the binaries any more.
 
> If the attacker is still logged in ( probably unlikely ) you might get a
> hint from netstat -NA |grep ESTABLISHED 

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