I checked my system with chkrootkit and rkhunter, but I do not really know what the output means. Searching for the topic and output pieces in the internet did not really help me.
I am running Debian Stretch with KDE and I have installed Sophos. I am using this system for about nearly 1 year, but installed chkrootkit and rkhunter recently.
The output from chkrootkit gave me the following:
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~# chkrootkit
ROOTDIR is `/'
Checking `amd'... not found
Checking `basename'... not infected
Checking `biff'... not found
Checking `chfn'... not infected
Checking `chsh'... not infected
Checking `cron'... not infected
Checking `crontab'... not infected
Checking `date'... not infected
Checking `du'... not infected
Checking `dirname'... not infected
Checking `echo'... not infected
Checking `egrep'... not infected
Checking `env'... not infected
Checking `find'... not infected
Checking `fingerd'... not found
Checking `gpm'... not found
Checking `grep'... not infected
Checking `hdparm'... not infected
Checking `su'... not infected
Checking `ifconfig'... not infected
Checking `inetd'... not infected
Checking `inetdconf'... not found
Checking `identd'... not found
Checking `init'... not infected
Checking `killall'... not infected
Checking `ldsopreload'... not infected
Checking `login'... not infected
Checking `ls'... not infected
Checking `lsof'... not infected
Checking `mail'... not infected
Checking `mingetty'... not found
Checking `netstat'... not infected
Checking `named'... not found
Checking `passwd'... not infected
Checking `pidof'... not infected
Checking `pop2'... not found
Checking `pop3'... not found
Checking `ps'... not infected
Checking `pstree'... not infected
Checking `rpcinfo'... not found
Checking `rlogind'... not found
Checking `rshd'... not found
Checking `slogin'... not infected
Checking `sendmail'... not infected
Checking `sshd'... not found
Checking `syslogd'... not tested
Checking `tar'... not infected
Checking `tcpd'... not infected
Checking `tcpdump'... not infected
Checking `top'... not infected
Checking `telnetd'... not found
Checking `timed'... not found
Checking `traceroute'... not infected
Checking `vdir'... not infected
Checking `w'... not infected
Checking `write'... not infected
Checking `aliens'... no suspect files
Searching for sniffer's logs, it may take a while... nothing found
Searching for rootkit HiDrootkit's default files... nothing found
Searching for rootkit t0rn's default files... nothing found
Searching for t0rn's v8 defaults... nothing found
Searching for rootkit Lion's default files... nothing found
Searching for rootkit RSHA's default files... nothing found
Searching for rootkit RH-Sharpe's default files... nothing found
Searching for Ambient's rootkit (ark) default files and dirs... nothing found
Searching for suspicious files and dirs, it may take a while... The following suspicious files and directories were found:
/usr/lib/jvm/.java-1.8.0-openjdk-amd64.jinfo /usr/lib/python3/dist-packages/PyQt5/uic/widget-plugins/.noinit
Searching for LPD Worm files and dirs... nothing found
Searching for Ramen Worm files and dirs... nothing found
Searching for Maniac files and dirs... nothing found
Searching for RK17 files and dirs... nothing found
Searching for Ducoci rootkit... nothing found
Searching for Adore Worm... nothing found
Searching for ShitC Worm... nothing found
Searching for Omega Worm... nothing found
Searching for Sadmind/IIS Worm... nothing found
Searching for MonKit... nothing found
Searching for Showtee... nothing found
Searching for OpticKit... nothing found
Searching for T.R.K... nothing found
Searching for Mithra... nothing found
Searching for LOC rootkit... nothing found
Searching for Romanian rootkit... nothing found
Searching for Suckit rootkit... nothing found
Searching for Volc rootkit... nothing found
Searching for Gold2 rootkit... nothing found
Searching for TC2 Worm default files and dirs... nothing found
Searching for Anonoying rootkit default files and dirs... nothing found
Searching for ZK rootkit default files and dirs... nothing found
Searching for ShKit rootkit default files and dirs... nothing found
Searching for AjaKit rootkit default files and dirs... nothing found
Searching for zaRwT rootkit default files and dirs... nothing found
Searching for Madalin rootkit default files... nothing found
Searching for Fu rootkit default files... nothing found
Searching for ESRK rootkit default files... nothing found
Searching for rootedoor... nothing found
Searching for ENYELKM rootkit default files... nothing found
Searching for common ssh-scanners default files... nothing found
Searching for Linux/Ebury - Operation Windigo ssh... nothing found
Searching for 64-bit Linux Rootkit ... nothing found
Searching for 64-bit Linux Rootkit modules... nothing found
Searching for suspect PHP files... nothing found
Searching for anomalies in shell history files... nothing found
Checking `asp'... not infected
Checking `bindshell'... not infected
Checking `lkm'... find: ‘/proc/4359/task/4359/net’: Invalid argument
find: ‘/proc/4359/net’: Invalid argument
chkproc: nothing detected
chkdirs: nothing detected
Checking `rexedcs'... not found
Checking `sniffer'... lo: not promisc and no packet sniffer sockets
wlp2s0: PACKET SNIFFER(/sbin/wpa_supplicant[736], /sbin/wpa_supplicant[736], /sbin/dhclient[8907])
Checking `w55808'... not infected
Checking `wted'... chkwtmp: nothing deleted
Checking `scalper'... not infected
Checking `slapper'... not infected
Checking `z2'... user lamios deleted or never logged from lastlog!
Checking `chkutmp'... The tty of the following user process(es) were not found
in /var/run/utmp !
! RUID PID TTY CMD
! root 691 tty7 /usr/lib/xorg/Xorg -nolisten tcp -auth /var/run/sddm/{cead4972-a2f2-441e-be1f-8e9d47c18de4} -background none -noreset -displayfd 18 vt7
chkutmp: nothing deleted
Checking `OSX_RSPLUG'... not infected
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Searching for suspicious files and dirs, it may take a while... The following suspicious files and directories were found:
/usr/lib/jvm/.java-1.8.0-openjdk-amd64.jinfo /usr/lib/python3/dist-packages/PyQt5/uic/widget-plugins/.noinit
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Checking `lkm'... find: ‘/proc/4359/task/4359/net’: Invalid argument
find: ‘/proc/4359/net’: Invalid argument
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wlp2s0: PACKET SNIFFER(/sbin/wpa_supplicant[736], /sbin/wpa_supplicant[736], /sbin/dhclient[8907])
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Checking `wted'... chkwtmp: nothing deleted
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Checking `z2'... user lamios deleted or never logged from lastlog!
Checking `chkutmp'... The tty of the following user process(es) were not found
in /var/run/utmp !
! RUID PID TTY CMD
! root 691 tty7 /usr/lib/xorg/Xorg -nolisten tcp -auth /var/run/sddm/{cead4972-a2f2-441e-be1f-8e9d47c18de4} -background none -noreset -displayfd 18 vt7
chkutmp: nothing deleted
rkhunter.log:
For rkhunter, I thought these lines might be important:
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[00:18:06] /usr/bin/lwp-request [ Warning ]
[00:18:06] Warning: The command '/usr/bin/lwp-request' has been replaced by a script: /usr/bin/lwp-request: Perl script text executable
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[00:18:46] Info: Starting test name 'filesystem'
[00:18:46] Performing filesystem checks
[00:18:46] Info: SCAN_MODE_DEV set to 'THOROUGH'
[00:18:47] Checking /dev for suspicious file types [ Warning ]
[00:18:47] Warning: Suspicious file types found in /dev:
[00:18:47] /dev/shm/com.sophos.av.process.exclusion: data
[00:18:47] /dev/shm/sem.com.sophos.av.process.exclusion: data
[00:18:47] Checking for hidden files and directories [ Warning ]
[00:18:47] Warning: Hidden directory found: /etc/.java
Does anybody know, if any of that stuff is concerning/how I get to know if I have to do something?
Thank you already for your help!