Ataque con rootkits

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Saludos compañeros, he recibido ataques a mi server White Box 3.0, lo que me han recomendado varias personas es que formatee mi PC pero antes de hacerlo quiero aprender como evitar nuevamente estos problemas y adicional aprender a detectarlos por eso es que he instalado el CHKROOTKIT herramienta que me sirve para detectar si tengo troyanos en mi server.
Este es el resultado al ejecutar el CHKROOTKIT lo cual me preocupa ya que en la línea 21 dice Checking `ifconfig'... INFECTED y también en la línea 40 dice Checking `pstree'... INFECTED

Adicional me dice:
Possible t0rn v8 \(or variation\) rootkit installed
Possible Showtee Rootkit installed
Romanian rootkit... /usr/include/file.h /usr/include/proc.h
Possible LKM Trojan installed

Realmente bien preocupante el asunto... sabe alguien como matar a todos estos intrusos antes de que le formatee de una vez???

ROOTDIR is `/'
Checking `amd'... not infected
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 infected
Checking `gpm'... not infected
Checking `grep'... not infected
Checking `hdparm'... not infected
Checking `su'... not infected
Checking `ifconfig'... INFECTED
Checking `inetd'... not found
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 infected
Checking `netstat'... not infected
Checking `named'... not infected
Checking `passwd'... not infected
Checking `pidof'... not infected
Checking `pop2'... not found
Checking `pop3'... not found
Checking `ps'... not infected
Checking `pstree'... INFECTED
Checking `rpcinfo'... not infected
Checking `rlogind'... not infected
Checking `rshd'... not infected
Checking `slogin'... not infected
Checking `sendmail'... not infected
Checking `sshd'... not infected
Checking `syslogd'... not infected
Checking `tar'... not infected
Checking `tcpd'... not infected
Checking `tcpdump'... not infected
Checking `top'... not infected
Checking `telnetd'... not infected
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 HiDrootkit's default dir... nothing found
Searching for t0rn's default files and dirs... nothing found
Searching for t0rn's v8 defaults... Possible t0rn v8 \(or variation\) rootkit installed
Searching for Lion Worm default files and dirs... nothing found
Searching for RSHA's default files and dir... nothing found
Searching for 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...
/usr/lib/perl5/5.8.0/i386-linux-thread-multi/.packlist /usr/lib/openoffice/share/gnome/net/.directory /usr/lib/openoffice/share/gnome/net/.order /usr/lib/openoffice/share/kde/net/applnk/OpenOffice.org/.directory /usr/lib/openoffice/share/kde/net/applnk/OpenOffice.org/.order

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... Warning: Possible Showtee Rootkit installed
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... /usr/include/file.h /usr/include/proc.h
Searching for HKRK 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 anomalies in shell history files... nothing found
Checking `asp'... not infected
Checking `bindshell'... not infected
Checking `lkm'... You have 2 process hidden for ps command
chkproc: Warning: Possible LKM Trojan installed
Checking `rexedcs'... not found
Checking `sniffer'... eth0: not promisc and no PF_PACKET sockets
eth1: not promisc and no PF_PACKET sockets
Checking `w55808'... not infected
Checking `wted'... chkwtmp: nothing deleted
Checking `scalper'... not infected
Checking `slapper'... not infected
Checking `z2'... chklastlog: nothing deleted
Checking `chkutmp'... chkutmp: nothing deleted

Ataque con rootkits

Imagen de eulises

Ok amigo bien por lo de rehacer el server.

cuando se instalan rootkit en los servers este modifica los binarios, tales como lo que reflejas pstree, ifconfig etc.

cuando ejecutas estos comandos los mismo pueden realizar su función, el problema consiste que cuando lo corres te realiza otra operación que quiere realizar el atacante como por ejemplo copiar un archivo cuando se ejecuta o ocultar tales procesos...

Saludos