An intruder tried to install a rootkit on my box. I want it back, before reinstallation. How do I replace invalid files installed by the attacker? I cannot chown or rm them. It says "Operation not permitted" on rm, chown, mv or similar. I'm running debian sarge.
Edit: chattr shows some flags (s, i and a) but removing them doesn't help. Edit again: my fault, sorry, chattr did work. I don't know I saw.