I'm running fully update Ubuntu 8.04 (as of today).
I did a "users" out of the blue and saw "root shwick shwick" and I only had two ssh sessions open to my gateway.
I checked if there was an additional ssh client running, as that is the only thing that I have exposed on the internet side:
root 6069 1 0 Dec09 ? 00:00:00 sshd: shwick [priv] shwick 6071 6069 0 Dec09 ? 00:00:01 sshd: shwick@pts/0 root 13731 1 0 Dec09 ? 00:00:00 sshd: shwick [priv] shwick 13734 13731 0 Dec09 ? 00:00:00 sshd: shwick@pts/2 root 14653 1 0 Dec09 ? 00:00:00 /usr/sbin/sshd
Looks like just my two shwick clients.
I get an email whenever someone logs on via ssh, so I checked all those, no suspicious ips. Also grepped auth.* and saw only logins from my ip on the lan.
I installed rkhunter, did a scan and got 0 rootkits found, but got a warning on hidden folders:
Checking for hidden files and directories [ Warning ] [19:57:09] Warning: Hidden directory found: /dev/.static [19:57:09] Warning: Hidden directory found: /dev/.udev [19:57:09] Warning: Hidden directory found: /dev/.initramfs
Is there a way to check exactly how the root user is logged in right now, and what it is doing?
I recently installed x11vnc and made a failed startup script for it, could that be doing something?