Sometimes processes are created and destroyed too fast for chkrootkit and you could get a false alarm. But that doesnt seem to be your case.
What chkrootkit does is check ps output against /proc information (which should be the same). Try to change to /proc/PID for eg. /proc/26194 and play with cmdline, environ and the other special files.
You can verify where is the binary that's really running, you can even try to get a memory dump of it in case it has been erased from the fs. Check the PATH env variable and PWD from /proc/PID/environ to see where is the binary.
I wish you good luck.
Regards,
-- Marcello Azambuja
Michael Weber wrote:
Hi there,
i am relatively new to security purposes and in this list. My name ist Michael Weber, i'm Networkadmin from Germany and i hope you can help me to solve this riddle:
When starting "chkrootkit" (v 0.38) i get the Message:
"You have 4 process hidden for ps command" and the hint for a probably installed "LKM Rootkit". So far, so good. "chkproc" with verbose option enabled (-v) say:
[EMAIL PROTECTED] chkrootkit-0.38]# ./chkproc -v PID 26194: not in ps output PID 26195: not in ps output PID 26196: not in ps output PID 26197: not in ps output You have 4 process hidden for ps command
That's fine, now we know the PID and can ask...
[EMAIL PROTECTED] chkrootkit-0.38]# ps p 26194 PID TTY STAT TIME COMMAND 26194 ? S 0:00 named -u named
Seems to be the name daemon, that's okay - a little nameserver for the local net (and only reachable by the local IP) is running. The 3 other deliver the same output.Looks like a bug in "chkrootkit" but - how safe can i be that this is really a bug and not a clever LKM? I guess that a rootkit will not be named "youhavebeencracked"...
Sorry for my english, feel free to correct it if necessary.
regards, Michael Weber
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