rkhunter : I have some bad "System tools" ?

Nikoms

Member
Nov 29, 2006
19
0
151
Hello,

I receive my rkhunter everyday,... I never read the mail because I'm very busy... But today, I decided to open it, and check if everything was ok on my server... But it seems that there is a problem :p

Here is what I received (in red : an error :) ):


Mirrorfile /usr/local/rkhunter/lib/rkhunter/db/mirrors.dat rotated
Using mirror http://rkhunter.sourceforge.net
[DB] Mirror file : Up to date
[DB] MD5 hashes system binaries : Up to date
[DB] Operating System information : Up to date
[DB] MD5 blacklisted tools/binaries : Up to date
[DB] Known good program versions : Up to date
[DB] Known bad program versions : Up to date




Ready.


Rootkit Hunter 1.2.9 is running

Determining OS... Ready


Checking binaries
* Selftests
Strings (command) [ OK ]


* System tools
Info: prelinked files found
Performing 'known good' check...
/bin/cat [ BAD ]
/bin/chmod [ BAD ]
/bin/chown [ BAD ]
/bin/date [ BAD ]
/bin/dmesg [ BAD ]
/bin/env [ BAD ]
/bin/grep [ BAD ]
/bin/kill [ BAD ]
/bin/login [ BAD ]
/bin/ls [ BAD ]
/bin/more [ BAD ]
/bin/mount [ BAD ]
/bin/netstat [ BAD ]
/bin/ps [ BAD ]
/bin/su [ BAD ]
/sbin/chkconfig [ BAD ]
/sbin/depmod [ BAD ]
/sbin/ifconfig [ BAD ]
/sbin/init [ BAD ]
/sbin/insmod [ BAD ]
/sbin/ip [ BAD ]
/sbin/lsmod [ BAD ]
/sbin/modinfo [ BAD ]
/sbin/modprobe [ BAD ]
/sbin/rmmod [ BAD ]
/sbin/runlevel [ BAD ]
/sbin/sulogin [ BAD ]
/sbin/sysctl [ BAD ]
/sbin/syslogd [ BAD ]
/usr/bin/chattr [ BAD ]
/usr/bin/du [ BAD ]
/usr/bin/file [ BAD ]
/usr/bin/find [ BAD ]
/usr/bin/head [ BAD ]
/usr/bin/killall [ BAD ]
/usr/bin/lsattr [ BAD ]
/usr/bin/passwd [ BAD ]
/usr/bin/pstree [ BAD ]
/usr/bin/sha1sum [ BAD ]
/usr/bin/stat [ BAD ]
/usr/bin/top [ BAD ]
/usr/bin/users [ BAD ]
/usr/bin/vmstat [ BAD ]
/usr/bin/w [ BAD ]
/usr/bin/watch [ BAD ]
/usr/bin/wc [ BAD ]
/usr/bin/wget [ BAD ]
/usr/bin/whereis [ BAD ]
/usr/bin/who [ BAD ]
/usr/bin/whoami [ BAD ]
--------------------------------------------------------------------------------
Rootkit Hunter has found some bad or unknown hashes. This can happen due to replaced
binaries or updated packages (which give other hashes). Be sure your hashes are
up-to-date (rkhunter --update). If you're in doubt about these hashes, contact
us through the Rootkit Hunter mailinglist at [email protected].
--------------------------------------------------------------------------------


Check rootkits
* Default files and directories
Rootkit '55808 Trojan - Variant A'... [ OK ]
ADM Worm... [ OK ]
Rootkit 'AjaKit'... [ OK ]
Rootkit 'aPa Kit'... [ OK ]
Rootkit 'Apache Worm'... [ OK ]
Rootkit 'Ambient (ark) Rootkit'... [ OK ]
Rootkit 'Balaur Rootkit'... [ OK ]
Rootkit 'BeastKit'... [ OK ]
Rootkit 'beX2'... [ OK ]
Rootkit 'BOBKit'... [ OK ]
Rootkit 'CiNIK Worm (Slapper.B variant)'... [ OK ]
Rootkit 'Danny-Boy's Abuse Kit'... [ OK ]
Rootkit 'Devil RootKit'... [ OK ]
Rootkit 'Dica'... [ OK ]
Rootkit 'Dreams Rootkit'... [ OK ]
Rootkit 'Duarawkz'... [ OK ]
Rootkit 'Flea Linux Rootkit'... [ OK ]
Rootkit 'FreeBSD Rootkit'... [ OK ]
Rootkit '****`it Rootkit'... [ OK ]
Rootkit 'GasKit'... [ OK ]
Rootkit 'Heroin LKM'... [ OK ]
Rootkit 'HjC Kit'... [ OK ]
Rootkit 'ignoKit'... [ OK ]
Rootkit 'ImperalsS-FBRK'... [ OK ]
Rootkit 'Irix Rootkit'... [ OK ]
Rootkit 'Kitko'... [ OK ]
Rootkit 'Knark'... [ OK ]
Rootkit 'Li0n Worm'... [ OK ]
Rootkit 'Lockit / LJK2'... [ OK ]
Rootkit 'MRK'... [ OK ]
Rootkit 'Ni0 Rootkit'... [ OK ]
Rootkit 'RootKit for SunOS / NSDAP'... [ OK ]
Rootkit 'Optic Kit (Tux)'... [ OK ]
Rootkit 'Oz Rootkit'... [ OK ]
Rootkit 'Portacelo'... [ OK ]
Rootkit 'R3dstorm Toolkit'... [ OK ]
Rootkit 'RH-Sharpe's rootkit'... [ OK ]
Rootkit 'RSHA's rootkit'... [ OK ]
Sebek LKM... [ OK ]
Rootkit 'Scalper Worm'... [ OK ]
Rootkit 'Shutdown'... [ OK ]
Rootkit 'SHV4'... [ OK ]
Rootkit 'SHV5'... [ OK ]
Rootkit 'Sin Rootkit'... [ OK ]
Rootkit 'Slapper'... [ OK ]
Rootkit 'Sneakin Rootkit'... [ OK ]
Rootkit 'Suckit Rootkit'... [ OK ]
Rootkit 'SunOS Rootkit'... [ OK ]
Rootkit 'Superkit'... [ OK ]
Rootkit 'TBD (Telnet BackDoor)'... [ OK ]
Rootkit 'TeLeKiT'... [ OK ]
Rootkit 'T0rn Rootkit'... [ OK ]
Rootkit 'Trojanit Kit'... [ OK ]
Rootkit 'Tuxtendo'... [ OK ]
Rootkit 'URK'... [ OK ]
Rootkit 'VcKit'... [ OK ]
Rootkit 'Volc Rootkit'... [ OK ]
Rootkit 'X-Org SunOS Rootkit'... [ OK ]
Rootkit 'zaRwT.KiT Rootkit'... [ OK ]

* Suspicious files and malware
Scanning for known rootkit strings [ OK ]
Scanning for known rootkit files [ OK ]
Testing running processes... [ OK ]
Miscellaneous Login backdoors [ OK ]
Miscellaneous directories [ OK ]
Software related files [ OK ]
Sniffer logs [ OK ]

* Trojan specific characteristics
shv4
Checking /etc/rc.d/rc.sysinit
Test 1 [ Clean ]
Test 2 [ Clean ]
Test 3 [ Clean ]
Checking /etc/inetd.conf [ Not found ]
Checking /etc/xinetd.conf [ Clean ]

* Suspicious file properties
chmod properties
Checking /bin/ps [ Clean ]
Checking /bin/ls [ Clean ]
Checking /usr/bin/w [ Clean ]
Checking /usr/bin/who [ Clean ]
Checking /bin/netstat [ Clean ]
Checking /bin/login [ Clean ]
Script replacements
Checking /bin/ps [ Clean ]
Checking /bin/ls [ Clean ]
Checking /usr/bin/w [ Clean ]
Checking /usr/bin/who [ Clean ]
Checking /bin/netstat [ Clean ]
Checking /bin/login [ Clean ]

* OS dependant tests

Linux
Checking loaded kernel modules... [ OK ]
Checking file attributes [ OK ]
Checking LKM module path [ OK ]


Networking
* Check: frequently used backdoors
Port 2001: Scalper Rootkit [ OK ]
Port 2006: CB Rootkit [ OK ]
Port 2128: MRK [ OK ]
Port 14856: Optic Kit (Tux) [ OK ]
Port 47107: T0rn Rootkit [ OK ]
Port 60922: zaRwT.KiT [ OK ]

* Interfaces
Scanning for promiscuous interfaces... [ OK ]


System checks
* Allround tests
Checking hostname... Found. Hostname is admin.namico.be
Checking for passwordless user accounts... OK
Checking for differences in user accounts... OK. No changes.
Checking for differences in user groups... OK. No changes.
Checking boot.local/rc.local file...
- /etc/rc.local [ OK ]
- /etc/rc.d/rc.local [ OK ]
- /usr/local/etc/rc.local [ Not found ]
- /usr/local/etc/rc.d/rc.local [ Not found ]
- /etc/conf.d/local.start [ Not found ]
- /etc/init.d/boot.local [ Not found ]
Checking rc.d files...
Processing........................................
........................................
........................................
........................................
........................................
........................................
........................................
........................................
........................................
........................................
........................................
........
Result rc.d files check [ OK ]
Checking history files
Bourne Shell [ OK ]

* Filesystem checks
Checking /dev for suspicious files... [ OK ]
Scanning for hidden files... [ Warning! ]
---------------
/etc/.pwd.lock
/etc/.whostmgrft /dev/.udevdb
---------------
Please inspect: /dev/.udevdb (directory)


Application advisories
* Application scan
Checking Apache2 modules ... [ Not found ]
Checking Apache configuration ... [ OK ]


Security advisories
* Check: Groups and Accounts
Searching for /etc/passwd... [ Found ]
Checking users with UID '0' (root)... [ OK ]

* Check: SSH
Searching for sshd_config...
Found /etc/ssh/sshd_config
Checking for allowed root login... Watch out Root login possible. Possible risk!
info: No 'PermitRootLogin' entry found in file /etc/ssh/sshd_config
Hint: See logfile for more information about this issue
Checking for allowed protocols... [ OK (Only SSH2 allowed) ]

* Check: Events and Logging
Search for syslog configuration... [ OK ]
Checking for running syslog slave... [ OK ]
Checking for logging to remote system... [ OK (no remote logging) ]


---------------------------- Scan results ----------------------------

MD5 scan
Scanned files: 50
Incorrect MD5 checksums: 50

File scan
Scanned files: 342
Possible infected files: 0

Application scan
Skipped

Scanning took 182 seconds





What do I have to do to clean up this?

Thank you!
 

AnilR

Active Member
Nov 24, 2007
28
0
51
India
......try this out

# rkhunter --update

And compile Rkhunter again to see if the md5sum errors still exists.

# rkhunter -c
 

Nikoms

Member
Nov 29, 2006
19
0
151
Hello.. I tried to update, but it seems that everything is up to date...


[email protected] [~]# rkhunter --update
Running updater...

Mirrorfile /usr/local/rkhunter/lib/rkhunter/db/mirrors.dat rotated
Using mirror http://rkhunter.sourceforge.net
[DB] Mirror file : Up to date
[DB] MD5 hashes system binaries : Up to date
[DB] Operating System information : Up to date
[DB] MD5 blacklisted tools/binaries : Up to date
[DB] Known good program versions : Up to date
[DB] Known bad program versions : Up to date




Ready.
[email protected] [~]# rkhunter -c


Rootkit Hunter 1.2.9 is running

Determining OS... Ready


Checking binaries
* Selftests
Strings (command) [ OK ]


* System tools
Info: prelinked files found
Performing 'known good' check...
/bin/cat [ BAD ]
/bin/chmod [ BAD ]
/bin/chown [ BAD ]
/bin/date [ BAD ]
/bin/dmesg [ BAD ]
/bin/env [ BAD ]
/bin/grep [ BAD ]
/bin/kill [ BAD ]
/bin/login [ BAD ]
/bin/ls [ BAD ]
/bin/more [ BAD ]
/bin/mount [ BAD ]
/bin/netstat [ BAD ]
/bin/ps [ BAD ]
/bin/su [ BAD ]
/sbin/chkconfig [ BAD ]
/sbin/depmod [ BAD ]
/sbin/ifconfig [ BAD ]
/sbin/init [ BAD ]
/sbin/insmod [ BAD ]
/sbin/ip [ BAD ]
/sbin/lsmod [ BAD ]
/sbin/modinfo [ BAD ]
/sbin/modprobe [ BAD ]
/sbin/rmmod [ BAD ]
/sbin/runlevel [ BAD ]
/sbin/sulogin [ BAD ]
/sbin/sysctl [ BAD ]
/sbin/syslogd [ BAD ]
/usr/bin/chattr [ BAD ]
/usr/bin/du [ BAD ]
/usr/bin/file [ BAD ]
/usr/bin/find [ BAD ]
/usr/bin/head [ BAD ]
/usr/bin/killall [ BAD ]
/usr/bin/lsattr [ BAD ]
/usr/bin/passwd [ BAD ]
/usr/bin/pstree [ BAD ]
/usr/bin/sha1sum [ BAD ]
/usr/bin/stat [ BAD ]
/usr/bin/top [ BAD ]
/usr/bin/users [ BAD ]
/usr/bin/vmstat [ BAD ]
/usr/bin/w [ BAD ]
/usr/bin/watch [ BAD ]
/usr/bin/wc [ BAD ]
/usr/bin/wget [ BAD ]
/usr/bin/whereis [ BAD ]
/usr/bin/who [ BAD ]
/usr/bin/whoami [ BAD ]
--------------------------------------------------------------------------------
Rootkit Hunter has found some bad or unknown hashes. This can happen due to replaced
binaries or updated packages (which give other hashes). Be sure your hashes are
up-to-date (rkhunter --update). If you're in doubt about these hashes, contact
us through the Rootkit Hunter mailinglist at [email protected].
--------------------------------------------------------------------------------