ルートキット検出 chkrootkit インストール

chkrootkitインストール
[root@freebsd ~]# cd /usr/ports/security/chkrootkit
[root@freebsd chkrootkit]# mkdir files
[root@freebsd chkrootkit]# fetch http://people.freebsd.org/~garga/patches/chkrootkit-utmpx.diff
[root@freebsd chkrootkit]# patch < chkrootkit-utmpx.diff
[root@freebsd chkrootkit]# make install clean
[root@freebsd chkrootkit]# rehash
[root@freebsd chkrootkit]# cd
chkrootkit実行
[root@freebsd ~]# chkrootkit
ROOTDIR is `/'
Checking `amd'... not infected
Checking `basename'... not infected
Checking `biff'... not infected
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 found
Checking `grep'... not infected
Checking `hdparm'... not found
Checking `su'... not infected
Checking `ifconfig'... not infected
Checking `inetd'... not infected
Checking `inetdconf'... not infected
Checking `identd'... not found
Checking `init'... not infected
Checking `killall'... not infected
Checking `ldsopreload'... not tested
Checking `login'... not infected
Checking `ls'... not infected
Checking `lsof'... not found
Checking `mail'... not infected
Checking `mingetty'... not found
Checking `netstat'... not infected
Checking `named'... not infected
Checking `passwd'... not infected
Checking `pidof'... not found
Checking `pop2'... not found
Checking `pop3'... not found
Checking `ps'... not infected
Checking `pstree'... not found
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 infected
Checking `traceroute'... not infected
Checking `vdir'... not found
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... nothing found
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... nothing found
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 OBSD rk v1... 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 suspect PHP files... nothing found
Searching for anomalies in shell history files... nothing found
Checking `asp'... not infected
Checking `bindshell'... not infected
Checking `lkm'... chkproc: nothing detected
chkdirs: nothing detected
Checking `rexedcs'... not found
Checking `sniffer'... usbus0 is not promisc
le0 is not promisc
Checking `w55808'... not infected
Checking `wted'... Checking `scalper'... not infected
Checking `slapper'... not infected
Checking `z2'... not tested: not found wtmp and/or lastlog file
Checking `chkutmp'... chkutmp: nothing deleted
Checking `OSX_RSPLUG'... not infected
[root@freebsd ~]# chkrootkit | grep "INFECTED" ←INFECTEDのみを抽出
Checking `bindshell'... INFECTED (PORTS:  1524 6667 31337)
ヒント
INFECTED(感染)と表示されなければ問題なし。 ※postfixでポート465番を開けた場合bindshellが誤検知されますが問題ありません。
chkrootkit定期実行
[root@freebsd ~]# vi /etc/periodic/daily/610.chkrootkit
#!/bin/sh

TMPFILE=`mktemp`

chkrootkit | grep INFECTED | grep -v "bindshell" > $TMPFILE

if [ -s $TMPFILE ]; then
	cat $TMPFILE | mail -s "chkrootkit `hostname` `date +%Y-%m-%d`" root > /dev/null
fi

rm -f $TMPFILE
[root@freebsd ~]# chmod 755 /etc/periodic/daily/610.chkrootkit
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