rkhunter meldet nur Blödsinn !

  • Thread starter Thread starter bubu2009
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bubu2009

Guest
Guten Abend,

ich habe nach der Übergabe des neuen ROOTDS Servers einen ROOTKIT Scann gemacht, dabei kam folgendes heraus.

Code: 
[ Rootkit Hunter version 1.3.4 ]

Checking rkhunter data files...
  Checking file mirrors.dat                                  [ No update ]
  Checking file programs_bad.dat                             [ Updated ]
  Checking file backdoorports.dat                            [ Updated ]
  Checking file suspscan.dat                                 [ Updated ]
  Checking file i18n/cn                                      [ No update ]
  Checking file i18n/de                                      [ Updated ]
  Checking file i18n/en                                      [ No update ]
  Checking file i18n/zh                                      [ No update ]
  Checking file i18n/zh.utf8                                 [ No update ]
[ Rootkit Hunter version 1.3.4 ]

Checking system commands...

  Performing 'strings' command checks
    Checking 'strings' command                               [ Skipped ]

  Performing 'shared libraries' checks
    Checking for preloading variables                        [ None found ]
    Checking for preload file                                [ Not found ]
    Checking LD_LIBRARY_PATH variable                        [ Not found ]

  Performing file properties checks
    Checking for prerequisites                               [ Warning ]
    /bin/bash                                                [ OK ]
    /bin/cat                                                 [ OK ]
    /bin/chmod                                               [ OK ]
    /bin/chown                                               [ OK ]
    /bin/cp                                                  [ OK ]
    /bin/date                                                [ OK ]
    /bin/df                                                  [ OK ]
    /bin/dmesg                                               [ OK ]
    /bin/echo                                                [ OK ]
    /bin/ed                                                  [ OK ]
    /bin/egrep                                               [ OK ]
    /bin/fgrep                                               [ OK ]
    /bin/fuser                                               [ OK ]
    /bin/grep                                                [ OK ]
    /bin/kill                                                [ OK ]
    /bin/login                                               [ OK ]
    /bin/ls                                                  [ OK ]
    /bin/mktemp                                              [ OK ]
    /bin/more                                                [ OK ]
    /bin/mount                                               [ OK ]
    /bin/mv                                                  [ OK ]
    /bin/netstat                                             [ OK ]
    /bin/ps                                                  [ OK ]
    /bin/pwd                                                 [ OK ]
    /bin/readlink                                            [ OK ]
    /bin/sed                                                 [ OK ]
    /bin/sh                                                  [ OK ]
    /bin/su                                                  [ OK ]
    /bin/touch                                               [ OK ]
    /bin/uname                                               [ OK ]
    /bin/which                                               [ Warning ]
    /usr/bin/awk                                             [ OK ]
    /usr/bin/basename                                        [ OK ]
    /usr/bin/chattr                                          [ OK ]
    /usr/bin/cut                                             [ OK ]
    /usr/bin/diff                                            [ OK ]
    /usr/bin/dirname                                         [ OK ]
    /usr/bin/dpkg                                            [ OK ]
    /usr/bin/dpkg-query                                      [ OK ]
    /usr/bin/du                                              [ OK ]
    /usr/bin/env                                             [ OK ]
    /usr/bin/file                                            [ OK ]
    /usr/bin/find                                            [ OK ]
    /usr/bin/GET                                             [ OK ]
    /usr/bin/groups                                          [ Warning ]
    /usr/bin/head                                            [ OK ]
    /usr/bin/id                                              [ OK ]
    /usr/bin/killall                                         [ OK ]
    /usr/bin/last                                            [ OK ]
    /usr/bin/lastlog                                         [ OK ]
    /usr/bin/ldd                                             [ Warning ]
    /usr/bin/logger                                          [ OK ]
    /usr/bin/lsattr                                          [ OK ]
    /usr/bin/mail                                            [ OK ]
    /usr/bin/md5sum                                          [ OK ]
    /usr/bin/newgrp                                          [ OK ]
    /usr/bin/passwd                                          [ OK ]
    /usr/bin/perl                                            [ OK ]
    /usr/bin/pstree                                          [ OK ]
    /usr/bin/runcon                                          [ OK ]
    /usr/bin/sha1sum                                         [ OK ]
    /usr/bin/sort                                            [ OK ]
    /usr/bin/stat                                            [ OK ]
    /usr/bin/tail                                            [ OK ]
    /usr/bin/test                                            [ OK ]
    /usr/bin/top                                             [ OK ]
    /usr/bin/touch                                           [ OK ]
    /usr/bin/tr                                              [ OK ]
    /usr/bin/uniq                                            [ OK ]
    /usr/bin/users                                           [ OK ]
    /usr/bin/vmstat                                          [ OK ]
    /usr/bin/w                                               [ OK ]
    /usr/bin/watch                                           [ OK ]
    /usr/bin/wc                                              [ OK ]
    /usr/bin/wget                                            [ OK ]
    /usr/bin/whatis                                          [ OK ]
    /usr/bin/whereis                                         [ OK ]
    /usr/bin/which                                           [ OK ]
    /usr/bin/who                                             [ OK ]
    /usr/bin/whoami                                          [ OK ]
    /usr/bin/gawk                                            [ OK ]
    /usr/bin/lwp-request                                     [ Warning ]
    /usr/bin/bsd-mailx                                       [ OK ]
    /usr/bin/w.procps                                        [ OK ]
    /sbin/ifconfig                                           [ OK ]
    /sbin/ifdown                                             [ OK ]
    /sbin/ifup                                               [ OK ]
    /sbin/init                                               [ OK ]
    /sbin/runlevel                                           [ OK ]
    /sbin/sulogin                                            [ OK ]
    /sbin/sysctl                                             [ OK ]
    /sbin/syslogd                                            [ OK ]
    /usr/sbin/adduser                                        [ OK ]
    /usr/sbin/chroot                                         [ OK ]
    /usr/sbin/cron                                           [ OK ]
    /usr/sbin/groupadd                                       [ OK ]
    /usr/sbin/groupdel                                       [ OK ]
    /usr/sbin/groupmod                                       [ OK ]
    /usr/sbin/grpck                                          [ OK ]
    /usr/sbin/nologin                                        [ OK ]
    /usr/sbin/pwck                                           [ OK ]
    /usr/sbin/tcpd                                           [ OK ]
    /usr/sbin/useradd                                        [ OK ]
    /usr/sbin/userdel                                        [ OK ]
    /usr/sbin/usermod                                        [ OK ]
    /usr/sbin/vipw                                           [ OK ]
    /usr/sbin/xinetd                                         [ OK ]

[Press <ENTER> to continue]

Checking for rootkits...

  Performing check of known rootkit files and directories
    55808 Trojan - Variant A                                 [ Not found ]
    ADM Worm                                                 [ Not found ]
    AjaKit Rootkit                                           [ Not found ]
    aPa Kit                                                  [ Not found ]
    Apache Worm                                              [ Not found ]
    Ambient (ark) Rootkit                                    [ Not found ]
    Balaur Rootkit                                           [ Not found ]
    BeastKit Rootkit                                         [ Not found ]
    beX2 Rootkit                                             [ Not found ]
    BOBKit Rootkit                                           [ Not found ]
    CiNIK Worm (Slapper.B variant)                           [ Not found ]
    Danny-Boy's Abuse Kit                                    [ Not found ]
    Devil RootKit                                            [ Not found ]
    Dica-Kit Rootkit                                         [ Not found ]
    Dreams Rootkit                                           [ Not found ]
    Duarawkz Rootkit                                         [ Not found ]
    Enye LKM                                                 [ Not found ]
    Flea Linux Rootkit                                       [ Not found ]
    FreeBSD Rootkit                                          [ Not found ]
    Fuck`it Rootkit                                          [ Not found ]
    GasKit Rootkit                                           [ Not found ]
    Heroin LKM                                               [ Not found ]
    HjC Kit                                                  [ Not found ]
    ignoKit Rootkit                                          [ Not found ]
    ImperalsS-FBRK Rootkit                                   [ Not found ]
    IntoXonia-NG Rootkit                                     [ Not found ]
    Irix Rootkit                                             [ Not found ]
    Kitko Rootkit                                            [ Not found ]
    Knark Rootkit                                            [ Not found ]
    Li0n Worm                                                [ Not found ]
    Lockit / LJK2 Rootkit                                    [ Not found ]
    Mood-NT Rootkit                                          [ Not found ]
    MRK Rootkit                                              [ Not found ]
    Ni0 Rootkit                                              [ Not found ]
    Ohhara Rootkit                                           [ Not found ]
    Optic Kit (Tux) Worm                                     [ Not found ]
    Oz Rootkit                                               [ Not found ]
    Phalanx Rootkit                                          [ Not found ]
    Phalanx Rootkit (strings)                                [ Not found ]
    Phalanx2 Rootkit                                         [ Not found ]
    Phalanx2 Rootkit (extended tests)                        [ Not found ]
    Portacelo Rootkit                                        [ Not found ]
    R3dstorm Toolkit                                         [ Not found ]
    RH-Sharpe's Rootkit                                      [ Not found ]
    RSHA's Rootkit                                           [ Not found ]
    Scalper Worm                                             [ Not found ]
    Sebek LKM                                                [ Not found ]
    Shutdown Rootkit                                         [ Not found ]
    SHV4 Rootkit                                             [ Not found ]
    SHV5 Rootkit                                             [ Not found ]
    Sin Rootkit                                              [ Not found ]
    Slapper Worm                                             [ Not found ]
    Sneakin Rootkit                                          [ Not found ]
    Suckit Rootkit                                           [ Not found ]
    SunOS Rootkit                                            [ Not found ]
    SunOS / NSDAP Rootkit                                    [ Not found ]
    Superkit Rootkit                                         [ Not found ]
    TBD (Telnet BackDoor)                                    [ Not found ]
    TeLeKiT Rootkit                                          [ Not found ]
    T0rn Rootkit                                             [ Not found ]
    Trojanit Kit                                             [ Not found ]
    Tuxtendo Rootkit                                         [ Not found ]
    URK Rootkit                                              [ Not found ]
    Vampire Rootkit                                          [ Not found ]
    VcKit Rootkit                                            [ Not found ]
    Volc Rootkit                                             [ Not found ]
    X-Org SunOS Rootkit                                      [ Not found ]
    zaRwT.KiT Rootkit                                        [ Not found ]

  Performing additional rootkit checks
    Suckit Rookit additional checks                          [ OK ]
    Checking for possible rootkit files and directories      [ None found ]
    Checking for possible rootkit strings                    [ Skipped ]

  Performing malware checks
    Checking running processes for suspicious files          [ Skipped ]
    Checking for login backdoors                             [ None found ]
    Checking for suspicious directories                      [ None found ]
    Checking for sniffer log files                           [ None found ]

  Performing trojan specific checks
    Checking for enabled xinetd services                     [ Warning ]
    Checking for Apache backdoor                             [ Not found ]

  Performing Linux specific checks
    Checking loaded kernel modules                           [ Skipped ]
    Checking kernel module names                             [ Warning ]

[Press <ENTER> to continue]

Checking the network...

  Performing check for backdoor ports
    Checking for TCP port 1524                               [ Not found ]
    Checking for TCP port 1984                               [ Not found ]
    Checking for UDP port 2001                               [ Not found ]
    Checking for TCP port 2006                               [ Not found ]
    Checking for TCP port 2128                               [ Not found ]
    Checking for TCP port 6666                               [ Not found ]
    Checking for TCP port 6667                               [ Not found ]
    Checking for TCP port 6668                               [ Not found ]
    Checking for TCP port 6669                               [ Not found ]
    Checking for TCP port 7000                               [ Not found ]
    Checking for TCP port 13000                              [ Not found ]
    Checking for TCP port 14856                              [ Not found ]
    Checking for TCP port 25000                              [ Not found ]
    Checking for TCP port 29812                              [ Not found ]
    Checking for TCP port 31337                              [ Not found ]
    Checking for TCP port 33369                              [ Not found ]
    Checking for TCP port 47107                              [ Not found ]
    Checking for TCP port 47018                              [ Not found ]
    Checking for TCP port 60922                              [ Not found ]
    Checking for TCP port 62883                              [ Not found ]
    Checking for TCP port 65535                              [ Not found ]

  Performing checks on the network interfaces
    Checking for promiscuous interfaces                      [ None found ]

[Press <ENTER> to continue]

Checking the local host...

  Performing system boot checks
    Checking for local host name                             [ Found ]
    Checking for system startup files                        [ Found ]
    Checking system startup files for malware                [ None found ]

  Performing group and account checks
    Checking for passwd file                                 [ Found ]
    Checking for root equivalent (UID 0) accounts            [ None found ]
    Checking for passwordless accounts                       [ None found ]
    Checking for passwd file changes                         [ Warning ]
    Checking for group file changes                          [ Warning ]
    Checking root account shell history files                [ OK ]

  Performing system configuration file checks
    Checking for SSH configuration file                      [ Found ]
    Checking if SSH root access is allowed                   [ Warning ]
    Checking if SSH protocol v1 is allowed                   [ Not allowed ]
    Checking for running syslog daemon                       [ Found ]
    Checking for syslog configuration file                   [ Found ]
    Checking if syslog remote logging is allowed             [ Not allowed ]

  Performing filesystem checks
    Checking /dev for suspicious file types                  [ None found ]
    Checking for hidden files and directories                [ None found ]

[Press <ENTER> to continue]

Checking application versions...

    Checking version of GnuPG                                [ Warning ]
    Checking version of Bind DNS                             [ Warning ]
    Checking version of OpenSSL                              [ Warning ]
    Checking version of PHP                                  [ Warning ]
    Checking version of Procmail MTA                         [ OK ]
    Checking version of ProFTPd                              [ Warning ]
    Checking version of OpenSSH                              [ Warning ]


System checks summary
=====================

File properties checks...
    Required commands check failed
    Files checked: 107
    Suspect files: 4

Rootkit checks...
    Rootkits checked : 83
    Possible rootkits: 0

Applications checks...
    Applications checked: 7
    Suspect applications: 6

The system checks took: 55 seconds

All results have been written to the logfile (/var/log/rkhunter.log)

One or more warnings have been found while checking the system.
Please check the log file (/var/log/rkhunter.log)

Der Server muss zu 100% sauber sein da ich sofort nach der Neuinstallation daran gearbeitet habe und die Zeit für einen Angrief zu kurz ist. Ich verwendet auch eine aktuelle Stable von Debian (Lenny). Und es gibt keinerlei Updates mehr, wodurch die Versions Warnungen auch falsch sind.

Wie kann ich das ganze so ändern das rkhunter es in "nullt" ? Denn so hat man ja keinerlei Überblick wann wirklich mal ein Notfall ist.

mfg
 
Ist das was Du da gepostet hast, die /var/log/rkhunter.log?

Denn "Warning" ist ja ein wenig unspezifisch. Ich könnte es mir aber lediglich mit Versionschecks erklären, kenne mich mit rkhunter aber nicht aus.

Der wichtigste Teil ist ja wohl "Performing check of known rootkit files and directories". Und da sagt er ja überall "Not found". Ergo: wo ist das Problem?

Dass das System (zumindest von Rootkits) sauber ist, kann man auch so rauslesen. Dir ist allerdings schon klar, dass sich die Sicherheit eines Servers nicht alleine mit der Suche nach Rootkits erledigen lässt? Wenn Du Dir ein solches eingefangen hättest, wäre mit dem Server grob was im Argen.
 
Ach ja, das weckt Erinnerungen....unter Sarge hatte ich früher 90% "Warning" kurz nach einer Neuinstallation meines Heimservers..^^
Meiner Meinung nach ist rkhunter schlicht und ergreifend unbrauchbar, selbst das manuelle Erstellen von Hashes (um das "Warning"-Gedöns zu umgehen) bei einem mit Sicherheit sauberen System hat nie funktioniert.
Mit chkrootkit bin ich immer besser gefahren, aber ich muss mich Thunderbyte anschliessen, wenn es schon soweit gekommen ist dass man nach Rootkits suchen muss dann ist vorher einiges falsch gelaufen.

Beschäftige dich lieber VORHER mit einer guten und sicheren Konfiguration, Rootkits der 2. und 3. Generation wirst du mit so einem simplen Scanner eh nicht auf die Schliche kommen.
 
Da Debian sicherheitskritische Fixes zurückportiert, kann es passieren, daß die Debian-Version zurück bleibt, aber trotzdem Sicherheitslücken nicht mehr vorhanden sind.
rkhunter vergleicht aber mit den aktuellen Versionsnummern der Software-Hersteller - und da gibt es derzeit einige für rkhunter relevante Programme, bei denen die Versionsnummern mittlerweile auseinander laufen. Das ist normal, das habe ich auch (und weiß aktuell auch noch nicht, wie ich es abstellen kann).
 
/etc/rkhunter.conf:

Code: 
DISABLE_TESTS="suspscan hidden_procs deleted_files packet_cap_apps promisc apps"

hat sich bei mir als brauchbar erwiesen, sonst meckert rkhunter den dhcpd, angeblich böse files, Prozesse mit deleted Files usw. usf. an

Bei der Menge der Ausgaben eines Standard-Scans, wird man mit den Default-Einstellungen wohl im Falle des Falles das Problem übersehen.
 
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