Re: victim of stealthy rootkit
On Mon, Apr 09, 2001 at 12:16:18PM -0700, Erik Abella wrote:
> A persistent joker attacked me with lion, ramen, and I trojan I still
> haven't found. I fired-up the free ID-scripts from SANS; did a whole lot of
> combing the filesystems; done away with cgi-bin; retained only root and my
> account as /bin/bash; and uninstalling everything except gnome+enlightenment
> and basic services - Just when I think that I've cleaned this menace out my
> system, he's back to wreak more havok.
>
> Is it possible that he rolled-up a "trojan kernel" with daemons that nmap,
> lsof and grep cannot detect to be listening? Now, postfix gets 'Name service
> errors' for any domain except mine; has my eth0 automatically going
> promiscuous for sniffing; and even managed to lock /etc/passwd.
>
> We're reinstalling the system but it's important for me to know how exactly
> this guys does what he does. Comments, anyone?
You may want to consider keeping a copy of sash around. (Statically
linked shell -- no shared libraries.) It can be useful for repairs
and/or doing intrusion analysis.
--
Nate Duehr <nate@natetech.com>
GPG Key fingerprint = DCAF 2B9D CC9B 96FA 7A6D AAF4 2D61 77C5 7ECE C1D2
Public Key available upon request, or at wwwkeys.pgp.net and others.
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