Se você usa ferramentas especializadas, também leia o manual do especialista . Você tem apenas avisos, sem erros ...; -)
Além disso, os rootkits são as peças mais maliciosas de malware existentes e
Já faz um tempo desde que eu estive aqui. Eu tenho me preocupado muito em tentar resolver problemas intermináveis com meus dispositivos sendo invadidos. Eu tenho uma ponte configurada na minha rede doméstica. É um TP-Link 841N, e eu tinha o wds ativado, conectado como um cliente na minha rede. O Nmap me diz que a porta 22 está aberta e tentei fazer o reflash várias vezes, fazendo o download através de muitos proxies diferentes, incluindo dois servidores openvpn, minha conexão celular e a rede tor. Eu também recentemente tive que ter o meu provedor vps pgp me uma nova senha, porque o painel web openvz continuava sendo hackeado. Isso aconteceu 3 ou 4 vezes e meu provedor precisou redefinir a senha. Então, eu fiz uma varredura no meu computador em busca de rootkits com chkroot e rkhunter, e recebi vários avisos. Vou postar a saída aqui: (Editado para formatação, 19/1/15)
##Chrkrootkit output:##
root@linuxpc:~# chkrootkit
ROOTDIR is '/'
Searching for suspicious files and dirs, it may take a while... The following suspicious files and directories were found:
/usr/lib/debug/.build-id /usr/lib/python2.7/dist-packages/PyQt4/uic/widget-plugins/.noinit
/usr/lib/pymodules/python2.7/.path /usr/lib/jvm/.java-1.7.0-openjdk amd64.jinfo
/usr/lib/debug/.build-id
Searching for Suckit rootkit... Warning: /sbin/init INFECTED
Checking 'sniffer'... lo: not promisc and no packet sniffer sockets
wlan0: PACKET SNIFFER(/sbin/wpa_supplicant[1850], /sbin/dhclient[3145])
Checking 'wted'... 1 deletion(s) between Sat Jan 17 21:43:47 2015 and Sat Jan 17 21:48:36 2015
Checking 'chkutmp'... The tty of the following user process(es) were not found in /var/run/utmp !
! RUID PID TTY CMD
! root 1463 tty7 /usr/bin/X :0 -background none -verbose -auth /var/run/gdm/auth-for-gdm-4y3SbT/database -seat seat0 -nolisten tcp vt7
chkutmp: nothing deleted
Checking 'OSX_RSPLUG'... not infected
root@linuxpc:~# Searching for Suckit rootkit... Warning: /sbin/init INFECTED
Searching: command not found
##------------##
#Rkhunter Output##
anon@linuxpc:~$ cat /var/log/rkhunter.log | grep Warning
[03:36:46] /usr/sbin/chroot [ Warning ]
[03:36:46] Warning: The file properties have changed:
[03:36:47] /usr/sbin/rsyslogd [ Warning ]
[03:36:47] Warning: The file properties have changed:
[03:36:48] /usr/bin/awk [ Warning ]
[03:36:48] Warning: The file properties have changed:
[03:36:48] /usr/bin/basename [ Warning ]
[03:36:48] Warning: The file properties have changed:
[03:36:49] /usr/bin/curl [ Warning ]
[03:36:49] Warning: The file '/usr/bin/curl' exists on the system, but it is not present in the rkhunter.dat file.
[03:36:49] /usr/bin/cut [ Warning ]
[03:36:49] Warning: The file properties have changed:
[03:36:49] /usr/bin/dirname [ Warning ]
[03:36:49] Warning: The file properties have changed:
[03:36:49] /usr/bin/du [ Warning ]
[03:36:49] Warning: The file properties have changed:
[03:36:50] /usr/bin/env [ Warning ]
[03:36:50] Warning: The file properties have changed:
[03:36:50] /usr/bin/file [ Warning ]
[03:36:50] Warning: The file properties have changed:
[03:36:50] /usr/bin/groups [ Warning ]
[03:36:50] Warning: The file properties have changed:
[03:36:50] /usr/bin/head [ Warning ]
[03:36:50] Warning: The file properties have changed:
[03:36:51] /usr/bin/id [ Warning ]
[03:36:51] Warning: The file properties have changed:
[03:36:51] /usr/bin/ldd [ Warning ]
[03:36:51] Warning: The file properties have changed:
[03:36:52] /usr/bin/logger [ Warning ]
[03:36:52] Warning: The file properties have changed:
[03:36:52] /usr/bin/mail [ Warning ]
[03:36:52] Warning: The file '/usr/bin/mail' exists on the system, but it is not present in the rkhunter.dat file.
[03:36:52] /usr/bin/md5sum [ Warning ]
[03:36:52] Warning: The file properties have changed:
[03:36:53] /usr/bin/runcon [ Warning ]
[03:36:53] Warning: The file properties have changed:
[03:36:53] /usr/bin/sha1sum [ Warning ]
[03:36:53] Warning: The file properties have changed:
[03:36:54] /usr/bin/sha224sum [ Warning ]
[03:36:54] Warning: The file properties have changed:
[03:36:54] /usr/bin/sha256sum [ Warning ]
[03:36:54] Warning: The file properties have changed:
[03:36:54] /usr/bin/sha384sum [ Warning ]
[03:36:54] Warning: The file properties have changed:
[03:36:54] /usr/bin/sha512sum [ Warning ]
[03:36:54] Warning: The file properties have changed:
[03:36:54] /usr/bin/sort [ Warning ]
[03:36:54] Warning: The file properties have changed:
[03:36:55] /usr/bin/stat [ Warning ]
[03:36:55] Warning: The file properties have changed:
[03:36:55] /usr/bin/tail [ Warning ]
[03:36:55] Warning: The file properties have changed:
[03:36:55] /usr/bin/test [ Warning ]
[03:36:55] Warning: The file properties have changed:
[03:36:56] /usr/bin/touch [ Warning ]
[03:36:56] Warning: The file properties have changed:
[03:36:56] /usr/bin/tr [ Warning ]
[03:36:56] Warning: The file properties have changed:
[03:36:56] /usr/bin/uniq [ Warning ]
[03:36:56] Warning: The file properties have changed:
[03:36:56] /usr/bin/users [ Warning ]
[03:36:56] Warning: The file properties have changed:
[03:36:57] /usr/bin/wc [ Warning ]
[03:36:57] Warning: The file properties have changed:
[03:36:57] /usr/bin/wget [ Warning ]
[03:36:57] Warning: The file properties have changed:
[03:36:57] /usr/bin/whatis [ Warning ]
[03:36:57] Warning: The file properties have changed:
[03:36:57] /usr/bin/whereis [ Warning ]
[03:36:57] Warning: The file properties have changed:
[03:36:58] /usr/bin/who [ Warning ]
[03:36:58] Warning: The file properties have changed:
[03:36:58] /usr/bin/whoami [ Warning ]
[03:36:58] Warning: The file properties have changed:
[03:36:58] /usr/bin/unhide.rb [ Warning ]
[03:36:58] Warning: The command '/usr/bin/unhide.rb' has been replaced by a script: /usr/bin/unhide.rb: Ruby script, ASCII text
[03:36:58] /usr/bin/gawk [ Warning ]
[03:36:58] Warning: The file '/usr/bin/gawk' exists on the system, but it is not present in the rkhunter.dat file.
[03:36:58] /usr/bin/bsd-mailx [ Warning ]
[03:36:58] Warning: The file '/usr/bin/bsd-mailx' exists on the system, but it is not present in the rkhunter.dat file.
[03:36:59] /sbin/fsck [ Warning ]
[03:36:59] Warning: The file properties have changed:
[03:36:59] /sbin/ifconfig [ Warning ]
[03:36:59] Warning: The file properties have changed:
[03:37:00] /sbin/route [ Warning ]
[03:37:00] Warning: The file properties have changed:
[03:37:01] /bin/bash [ Warning ]
[03:37:01] Warning: The file properties have changed:
[03:37:02] /bin/cat [ Warning ]
[03:37:02] Warning: The file properties have changed:
[03:37:02] /bin/chmod [ Warning ]
[03:37:02] Warning: The file properties have changed:
[03:37:02] /bin/chown [ Warning ]
[03:37:02] Warning: The file properties have changed:
[03:37:02] /bin/cp [ Warning ]
[03:37:02] Warning: The file properties have changed:
[03:37:03] /bin/date [ Warning ]
[03:37:03] Warning: The file properties have changed:
[03:37:03] /bin/df [ Warning ]
[03:37:03] Warning: The file properties have changed:
[03:37:03] /bin/dmesg [ Warning ]
[03:37:03] Warning: The file properties have changed:
[03:37:03] /bin/echo [ Warning ]
[03:37:03] Warning: The file properties have changed:
[03:37:04] /bin/ls [ Warning ]
[03:37:04] Warning: The file properties have changed:
[03:37:05] /bin/mktemp [ Warning ]
[03:37:05] Warning: The file properties have changed:
[03:37:05] /bin/more [ Warning ]
[03:37:05] Warning: The file properties have changed:
[03:37:05] /bin/mount [ Warning ]
[03:37:05] Warning: The file properties have changed:
[03:37:05] /bin/mv [ Warning ]
[03:37:05] Warning: The file properties have changed:
[03:37:06] /bin/netstat [ Warning ]
[03:37:06] Warning: The file properties have changed:
[03:37:06] /bin/pwd [ Warning ]
[03:37:06] Warning: The file properties have changed:
[03:37:06] /bin/readlink [ Warning ]
[03:37:06] Warning: The file properties have changed:
[03:37:07] /bin/touch [ Warning ]
[03:37:07] Warning: The file properties have changed:
[03:37:07] /bin/uname [ Warning ]
[03:37:07] Warning: The file properties have changed:
[03:37:08] /usr/bin/mawk [ Warning ]
[03:37:08] Warning: The file '/usr/bin/mawk' does not exist on the system, but it is present in the rkhunter.dat file.
[03:46:29] Checking /dev for suspicious file types [ Warning ]
[03:46:29] Warning: Suspicious file types found in /dev:
[03:46:29] Checking for hidden files and directories [ Warning ]
[03:46:29] Warning: Hidden directory found: '/etc/.java: directory '
[03:46:29] Warning: Hidden directory found: '/dev/.udev: directory '
[03:46:29] Warning: Hidden file found: /dev/.initramfs: symbolic link to '/run/initramfs'
## End Output##
Eu não acho que foi há muito tempo que eu corri um propupdate, e rkhunter com certeza está me dando muitos avisos. O aviso da interface promíscua não estava aparecendo antes. Alguém mais experiente pode me ajudar a decifrar esses resultados? Eu sei que o rootkit do suckit pode ser um falso positivo, mas o Rkhunters está me deixando nervoso, junto com toda a estranha atividade que eu lidei com o meu vps, que também era um nó de saída do tor por um longo tempo. Obrigado.
(Atualização em 19/1/15) Eu segui seu conselho e removi as linhas dizendo que nada estava infectado, e atualizei o rkhunter. Em seguida, executei a nova versão (1.4.2) e esses avisos apareceram:
[15:48:20] /usr/local/bin/rkhunter [ Warning ]
[15:48:20] Warning: The file '/usr/local/bin/rkhunter' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:20] /usr/sbin/adduser [ Warning ]
[15:48:20] Warning: The command '/usr/sbin/adduser' has been replaced by a script: /usr/sbin/adduser: Perl script, ASCII text executable
[15:48:20] /usr/sbin/chroot [ Warning ]
[15:48:20] Warning: The file properties have changed:
[15:48:22] /usr/sbin/rsyslogd [ Warning ]
[15:48:22] Warning: The file properties have changed:
[15:48:23] /usr/bin/awk [ Warning ]
[15:48:23] Warning: The file properties have changed:
[15:48:23] Warning: No symbolic link target found for file '/usr/bin/awk' in the 'rkhunter.dat' file.
[15:48:23] /usr/bin/basename [ Warning ]
[15:48:23] Warning: The file properties have changed:
[15:48:24] /usr/bin/curl [ Warning ]
[15:48:24] Warning: The file '/usr/bin/curl' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:24] /usr/bin/cut [ Warning ]
[15:48:24] Warning: The file properties have changed:
[15:48:24] /usr/bin/dirname [ Warning ]
[15:48:24] Warning: The file properties have changed:
[15:48:25] /usr/bin/du [ Warning ]
[15:48:25] Warning: The file properties have changed:
[15:48:25] /usr/bin/env [ Warning ]
[15:48:25] Warning: The file properties have changed:
[15:48:25] /usr/bin/file [ Warning ]
[15:48:25] Warning: The file properties have changed:
[15:48:25] /usr/bin/GET [ Warning ]
[15:48:25] Warning: No symbolic link target found for file '/usr/bin/GET' in the 'rkhunter.dat' file.
[15:48:26] /usr/bin/groups [ Warning ]
[15:48:26] Warning: The file properties have changed:
[15:48:26] /usr/bin/head [ Warning ]
[15:48:26] Warning: The file properties have changed:
[15:48:26] /usr/bin/id [ Warning ]
[15:48:26] Warning: The file properties have changed:
[15:48:27] /usr/bin/ldd [ Warning ]
[15:48:27] Warning: The file properties have changed:
[15:48:27] Warning: The command '/usr/bin/ldd' has been replaced by a script: /usr/bin/ldd: Bourne-Again shell script, ASCII text executable
[15:48:27] /usr/bin/less [ Warning ]
[15:48:27] Warning: No symbolic link target found for file '/usr/bin/less' in the 'rkhunter.dat' file.
[15:48:27] /usr/bin/locate [ Warning ]
[15:48:27] Warning: No symbolic link target found for file '/usr/bin/locate' in the 'rkhunter.dat' file.
[15:48:27] /usr/bin/logger [ Warning ]
[15:48:27] Warning: The file properties have changed:
[15:48:28] /usr/bin/mail [ Warning ]
[15:48:28] Warning: The file '/usr/bin/mail' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:28] /usr/bin/md5sum [ Warning ]
[15:48:28] Warning: The file properties have changed:
[15:48:29] /usr/bin/pkill [ Warning ]
[15:48:29] Warning: No symbolic link target found for file '/usr/bin/pkill' in the 'rkhunter.dat' file.
[15:48:29] /usr/bin/runcon [ Warning ]
[15:48:29] Warning: The file properties have changed:
[15:48:29] /usr/bin/sha1sum [ Warning ]
[15:48:29] Warning: The file properties have changed:
[15:48:30] /usr/bin/sha224sum [ Warning ]
[15:48:30] Warning: The file properties have changed:
[15:48:30] /usr/bin/sha256sum [ Warning ]
[15:48:30] Warning: The file properties have changed:
[15:48:30] /usr/bin/sha384sum [ Warning ]
[15:48:30] Warning: The file properties have changed:
[15:48:30] /usr/bin/sha512sum [ Warning ]
[15:48:30] Warning: The file properties have changed:
[15:48:31] /usr/bin/sort [ Warning ]
[15:48:31] Warning: The file properties have changed:
[15:48:31] /usr/bin/ssh [ Warning ]
[15:48:31] Warning: The file '/usr/bin/ssh' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:31] /usr/bin/stat [ Warning ]
[15:48:31] Warning: The file properties have changed:
[15:48:32] /usr/bin/tail [ Warning ]
[15:48:32] Warning: The file properties have changed:
[15:48:32] /usr/bin/telnet [ Warning ]
[15:48:32] Warning: The file '/usr/bin/telnet' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:32] /usr/bin/test [ Warning ]
[15:48:32] Warning: The file properties have changed:
[15:48:32] /usr/bin/touch [ Warning ]
[15:48:32] Warning: The file properties have changed:
[15:48:33] Warning: No symbolic link target found for file '/usr/bin/touch' in the 'rkhunter.dat' file.
[15:48:33] /usr/bin/tr [ Warning ]
[15:48:33] Warning: The file properties have changed:
[15:48:33] /usr/bin/uniq [ Warning ]
[15:48:33] Warning: The file properties have changed:
[15:48:33] /usr/bin/users [ Warning ]
[15:48:33] Warning: The file properties have changed:
[15:48:34] /usr/bin/w [ Warning ]
[15:48:34] Warning: No symbolic link target found for file '/usr/bin/w' in the 'rkhunter.dat' file.
[15:48:34] /usr/bin/wc [ Warning ]
[15:48:34] Warning: The file properties have changed:
[15:48:34] /usr/bin/wget [ Warning ]
[15:48:34] Warning: The file properties have changed:
[15:48:34] /usr/bin/whatis [ Warning ]
[15:48:34] Warning: The file properties have changed:
[15:48:34] /usr/bin/whereis [ Warning ]
[15:48:34] Warning: The file properties have changed:
[15:48:35] /usr/bin/which [ Warning ]
[15:48:35] Warning: No symbolic link target found for file '/usr/bin/which' in the 'rkhunter.dat' file.
[15:48:35] /usr/bin/who [ Warning ]
[15:48:35] Warning: The file properties have changed:
[15:48:35] /usr/bin/whoami [ Warning ]
[15:48:35] Warning: The file properties have changed:
[15:48:35] /usr/bin/gawk [ Warning ]
[15:48:35] Warning: The file '/usr/bin/gawk' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:35] /usr/bin/lwp-request [ Warning ]
[15:48:35] Warning: The command '/usr/bin/lwp-request' has been replaced by a script: /usr/bin/lwp-request: Perl script, ASCII text executable
[15:48:35] /usr/bin/bsd-mailx [ Warning ]
[15:48:35] Warning: The file '/usr/bin/bsd-mailx' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:35] /usr/bin/telnet.netkit [ Warning ]
[15:48:36] Warning: The file '/usr/bin/telnet.netkit' exists on the system, but it is not present in the 'rkhunter.dat' file.
[15:48:36] /sbin/depmod [ Warning ]
[15:48:36] Warning: No symbolic link target found for file '/sbin/depmod' in the 'rkhunter.dat' file.
[15:48:36] /sbin/fsck [ Warning ]
[15:48:36] Warning: The file properties have changed:
[15:48:36] /sbin/ifconfig [ Warning ]
[15:48:36] Warning: The file properties have changed:
[15:48:37] /sbin/ifdown [ Warning ]
[15:48:37] Warning: No symbolic link target found for file '/sbin/ifdown' in the 'rkhunter.dat' file.
[15:48:37] /sbin/insmod [ Warning ]
[15:48:37] Warning: No symbolic link target found for file '/sbin/insmod' in the 'rkhunter.dat' file.
[15:48:37] /sbin/ip [ Warning ]
[15:48:37] Warning: No symbolic link target found for file '/sbin/ip' in the 'rkhunter.dat' file.
[15:48:37] /sbin/lsmod [ Warning ]
[15:48:37] Warning: No symbolic link target found for file '/sbin/lsmod' in the 'rkhunter.dat' file.
[15:48:38] /sbin/modinfo [ Warning ]
[15:48:38] Warning: No symbolic link target found for file '/sbin/modinfo' in the 'rkhunter.dat' file.
[15:48:38] /sbin/modprobe [ Warning ]
[15:48:38] Warning: No symbolic link target found for file '/sbin/modprobe' in the 'rkhunter.dat' file.
[15:48:38] /sbin/rmmod [ Warning ]
[15:48:38] Warning: No symbolic link target found for file '/sbin/rmmod' in the 'rkhunter.dat' file.
[15:48:38] /sbin/route [ Warning ]
[15:48:38] Warning: The file properties have changed:
[15:48:39] /bin/bash [ Warning ]
[15:48:39] Warning: The file properties have changed:
[15:48:39] /bin/cat [ Warning ]
[15:48:39] Warning: The file properties have changed:
[15:48:40] /bin/chmod [ Warning ]
[15:48:40] Warning: The file properties have changed:
[15:48:40] /bin/chown [ Warning ]
[15:48:40] Warning: The file properties have changed:
[15:48:40] /bin/cp [ Warning ]
[15:48:40] Warning: The file properties have changed:
[15:48:40] /bin/date [ Warning ]
[15:48:40] Warning: The file properties have changed:
[15:48:41] /bin/df [ Warning ]
[15:48:41] Warning: The file properties have changed:
[15:48:41] /bin/dmesg [ Warning ]
[15:48:41] Warning: The file properties have changed:
[15:48:41] /bin/echo [ Warning ]
[15:48:41] Warning: The file properties have changed:
[15:48:43] /bin/ls [ Warning ]
[15:48:43] Warning: The file properties have changed:
[15:48:43] /bin/lsmod [ Warning ]
[15:48:43] Warning: No symbolic link target found for file '/bin/lsmod' in the 'rkhunter.dat' file.
[15:48:43] /bin/mktemp [ Warning ]
[15:48:43] Warning: The file properties have changed:
[15:48:43] /bin/more [ Warning ]
[15:48:43] Warning: The file properties have changed:
[15:48:43] /bin/mount [ Warning ]
[15:48:43] Warning: The file properties have changed:
[15:48:44] /bin/mv [ Warning ]
[15:48:44] Warning: The file properties have changed:
[15:48:44] /bin/netstat [ Warning ]
[15:48:44] Warning: The file properties have changed:
[15:48:44] /bin/pwd [ Warning ]
[15:48:44] Warning: The file properties have changed:
[15:48:45] /bin/readlink [ Warning ]
[15:48:45] Warning: The file properties have changed:
[15:48:45] /bin/sh [ Warning ]
[15:48:45] Warning: No symbolic link target found for file '/bin/sh' in the 'rkhunter.dat' file.
[15:48:45] /bin/touch [ Warning ]
[15:48:45] Warning: The file properties have changed:
[15:48:46] /bin/uname [ Warning ]
[15:48:46] Warning: The file properties have changed:
[15:48:46] /bin/which [ Warning ]
[15:48:46] Warning: The command '/bin/which' has been replaced by a script: /bin/which: POSIX shell script, ASCII text executable
[15:48:46] /etc/rkhunter.conf [ Warning ]
[15:48:46] Warning: The file '/etc/rkhunter.conf' exists on the system, but it is not present in the 'rkhunter.dat' file.
[16:08:55] Checking /dev for suspicious file types [ Warning ]
[16:08:55] Warning: Suspicious file types found in /dev:
[16:08:55] Checking for hidden files and directories [ Warning ]
[16:08:55] Warning: Hidden directory found: /etc/.java: directory
[16:08:55] Warning: Hidden directory found: /dev/.udev: directory
[16:08:55] Warning: Hidden file found: /dev/.blkid.tab: ASCII text
[16:08:55] Warning: Hidden file found: /dev/.blkid.tab.old: ASCII text
[16:08:55] Warning: Hidden file found: /dev/.initramfs: symbolic link to '/run/initramfs'
Eu posso ver que alguns desses avisos são causados por atualizar o rkhunter e ter arquivos de configuração antigos em / etc, mas não tenho tanta certeza sobre os outros. Você ainda acha que as coisas parecem normais? Eu sinceramente agradeço a ajuda.
Se você usa ferramentas especializadas, também leia o manual do especialista . Você tem apenas avisos, sem erros ...; -)
Além disso, os rootkits são as peças mais maliciosas de malware existentes e