David Timms wrote:
Bob Goodwin wrote:
This is a fairly new FC5 installation, new ISP, and new wireless
router system, all together adding up to numerous possibilities for
errors. I installed and ran "chkrootkit" this morning with the
following result and don't know how to deal with it? Any suggestions
appreciated.
Checking `asp'... not infected
Checking `bindshell'... not infected
Checking `lkm'... You have 1 process hidden for readdir command
You have 1 process hidden for ps command
chkproc: Warning: Possible LKM Trojan installed
I get:
Checking `lkm'... chkproc: nothing detected
...
Checking `chkutmp'... The tty of the following user process(es) were
not found
in /var/run/utmp !
! RUID PID TTY CMD
! root 2301 tty7 X :0 -auth /root/.serverauth.2284
chkutmp: nothing deleted
rkhunter and possibly chkrootkit have not been modified to take into
account the FC5 norms (I think).
I scanned from "/" with f-prot yesterday and there were no
indications of "infection."
The point of a rootkit is that any command / program could no longer
be trusted: eg scanner asks OS: "open file x to check if its a got a
virus" OS responds with "data" - but it is not the real data inside
the file.
I've got the following installed:
rkhunter-1.2.8-3.fc5
chkrootkit-0.46a-2.2.fc5.rf
Is your chkrootkit the same version ?
It think it's worth installing rkhunter (either from core or extras -
I've forgotten) for a second opinion.
DaveT.
-----------------------------------------------
Installed "rkhunter" via yum and ran it, it seemed to say the check for
"LKM" was ok?
But reported the following:
------------------------------------------------
* Filesystem checks
Checking /dev for suspicious files... [ OK ]
Scanning for hidden files... [ Warning! ]
---------------
/dev/.udev /usr/share/man/man1/..1.gz /etc/.pwd.lock /etc/.java
---------------
Please inspect: /dev/.udev (directory) /usr/share/man/man1/..1.gz
(gzip compressed data, from Unix, max compression) /etc/.java (directory)
[Press <ENTER> to continue]
--------------------------------------------
And finally it reports:
---------------------------- Scan results ----------------------------
MD5
MD5 compared: 0
Incorrect MD5 checksums: 0
File scan
Scanned files: 342
Possible infected files: 0
Application scan
Scanning took 311 seconds
------------------- Mon, 01 May 2006 10:08:02 -0400 -------------------
Of course I'm not certain of the validity of either check when
chkrootkit and rkhunter are installed "after the fact?"
BobG
