In my process list there are 1,2, or sometimes 3 processes with no name, and changing their PIDs in every 1-2 second, so there is no chance to kill these processes.
Does anyone have any idea what are those?
rkhunter does not detect anything

chkrootkit warns that possible LKM rootkit detected.

How can I delete / kill forever these processes or invastigate what is going on?

In red you can see the strange process without any name. After 1 second it diasappears from the list and then reappeares with a new PID.