RKHunter是一款专业的检测系统是否感染rootkit工具，RKHunter可以通过执行一系列的脚本来确认服务器是否已经感染rootkit。本文主要为大家介绍RKHunter安装及使用教程，供大家参考。
1、安装RKHunter（下载地址：https://sourceforge.net/projects/rkhunter/files/latest/download）
[root@server ~]# tar -zxf rkhunter-1.4.6.tar.gz #版本可能不同，命令都一样
[root@server ~]# cd rkhunter-1.4.6
[root@server rkhunter-1.4.6]# ./installer.sh –layout default –install
注意：RKHunter的默认安装方式，目录：/usr/local/bin
2、RKHunter常用参数列表
| 参数 | 含义 |
| -c, –check | 必选参数，表示检测当前系统 |
| –configfile <file> | 使用特定配置文件 |
| –cronjob | 作为cron任务定期运行 |
| –sk, –skip-keypress | 自动完成所有检测，跳过键盘输入 |
| –summary | 显示检测结果的统计信息 |
| –update | 检测更新内容 |
| -V, –version | 显示版本信息 |
| –versioncheck | 检测最新版本 |
| –propupd [file | directory ] | 建立样本文件，建议安装完系统就建立 |
检测示例：
[root@master rkhunter-1.4.6]# rkhunter -c[ Rootkit Hunter version 1.4.6 ]Checking system commands... Performing 'strings' command checks Checking 'strings' command [ OK ] Performing 'shared libraries' checks Checking for preloading variables [ None found ] Checking for preloaded libraries [ None found ] Checking LD_LIBRARY_PATH variable [ Not found ] Performing file properties checks Checking for prerequisites [ Warning ] /usr/local/bin/rkhunter [ OK ] /usr/sbin/adduser [ OK ] /usr/sbin/chkconfig [ OK ] /usr/sbin/chroot [ OK ] /usr/sbin/depmod [ OK ] /usr/sbin/fsck [ OK ] /usr/sbin/groupadd [ OK ] /usr/sbin/groupdel [ OK ] /usr/sbin/groupmod [ OK ] /usr/sbin/grpck [ OK ] /usr/sbin/ifconfig [ OK ] /usr/sbin/ifdown [ Warning ] /usr/sbin/ifup [ Warning ] /usr/sbin/init [ OK ] /usr/sbin/insmod [ OK ] /usr/sbin/ip [ OK ] /usr/sbin/lsmod [ OK ] /usr/sbin/lsof [ OK ] /usr/sbin/modinfo [ OK ] /usr/sbin/modprobe [ OK ] /usr/sbin/nologin [ OK ] /usr/sbin/pwck [ OK ] /usr/sbin/rmmod [ OK ] /usr/sbin/route [ OK ] /usr/sbin/rsyslogd [ OK ] /usr/sbin/runlevel [ OK ] /usr/sbin/sestatus [ OK ] /usr/sbin/sshd [ OK ] /usr/sbin/sulogin [ OK ] /usr/sbin/sysctl [ OK ] /usr/sbin/useradd [ OK ] /usr/sbin/userdel [ OK ] /usr/sbin/usermod [ OK ] /usr/sbin/vipw [ OK ] /usr/bin/awk [ OK ] /usr/bin/basename [ OK ] /usr/bin/bash [ OK ] /usr/bin/cat [ OK ] /usr/bin/chattr [ OK ] /usr/bin/chmod [ OK ] /usr/bin/chown [ OK ] /usr/bin/cp [ OK ] /usr/bin/curl [ OK ] /usr/bin/cut [ OK ] /usr/bin/date [ OK ] /usr/bin/df [ OK ] /usr/bin/diff [ OK ] /usr/bin/dirname [ OK ] /usr/bin/dmesg [ OK ] /usr/bin/du [ OK ] /usr/bin/echo [ OK ] /usr/bin/egrep [ Warning ] /usr/bin/env [ OK ] /usr/bin/fgrep [ Warning ] /usr/bin/file [ OK ] /usr/bin/find [ OK ] /usr/bin/grep [ OK ] /usr/bin/groups [ OK ] /usr/bin/head [ OK ] /usr/bin/id [ OK ] /usr/bin/ipcs [ OK ] /usr/bin/kill [ OK ] /usr/bin/last [ OK ] /usr/bin/lastlog [ OK ] /usr/bin/ldd [ Warning ] /usr/bin/less [ OK ] /usr/bin/logger [ OK ] /usr/bin/login [ OK ] /usr/bin/ls [ OK ] /usr/bin/lsattr [ OK ] /usr/bin/md5sum [ OK ] /usr/bin/mktemp [ OK ] /usr/bin/more [ OK ] /usr/bin/mount [ OK ] /usr/bin/mv [ OK ] /usr/bin/netstat [ OK ] /usr/bin/newgrp [ OK ] /usr/bin/passwd [ OK ] /usr/bin/perl [ OK ] /usr/bin/pgrep [ OK ] /usr/bin/ping [ OK ] /usr/bin/pkill [ OK ] /usr/bin/ps [ OK ] /usr/bin/pwd [ OK ] /usr/bin/readlink [ OK ] /usr/bin/rpm [ OK ] /usr/bin/runcon [ OK ] /usr/bin/sed [ OK ] /usr/bin/sh [ OK ] /usr/bin/sha1sum [ OK ] /usr/bin/sha224sum [ OK ] /usr/bin/sha256sum [ OK ] /usr/bin/sha384sum [ OK ] /usr/bin/sha512sum [ OK ] /usr/bin/size [ OK ] /usr/bin/sort [ OK ] /usr/bin/ssh [ OK ] /usr/bin/stat [ OK ] /usr/bin/strace [ OK ] /usr/bin/strings [ OK ] /usr/bin/su [ OK ] /usr/bin/sudo [ OK ] /usr/bin/tail [ OK ] /usr/bin/telnet [ OK ] /usr/bin/test [ OK ] /usr/bin/top [ OK ] /usr/bin/touch [ OK ] /usr/bin/tr [ OK ] /usr/bin/uname [ OK ] /usr/bin/uniq [ OK ] /usr/bin/users [ OK ] /usr/bin/vmstat [ OK ] /usr/bin/w [ OK ] /usr/bin/watch [ OK ] /usr/bin/wc [ OK ] /usr/bin/wget [ OK ] /usr/bin/whatis [ OK ] /usr/bin/whereis [ OK ] /usr/bin/which [ OK ] /usr/bin/who [ OK ] /usr/bin/whoami [ OK ] /usr/bin/numfmt [ OK ] /usr/bin/kmod [ OK ] /usr/bin/systemctl [ OK ] /usr/bin/gawk [ OK ] /usr/lib/systemd/systemd [ OK ] /etc/rkhunter.conf [ OK ][Press <ENTER> to continue]Checking for rootkits... Performing check of known rootkit files and directories 55808 Trojan - Variant A [ Not found ] ADM Worm [ Not found ] AjaKit Rootkit [ Not found ] Adore Rootkit [ Not found ] aPa Kit [ Not found ] Apache Worm [ Not found ] Ambient (ark) Rootkit [ Not found ] Balaur Rootkit [ Not found ] BeastKit Rootkit [ Not found ] beX2 Rootkit [ Not found ] BOBKit Rootkit [ Not found ] cb Rootkit [ Not found ] CiNIK Worm (Slapper.B variant) [ Not found ] Danny-Boy's Abuse Kit [ Not found ] Devil RootKit [ Not found ] Diamorphine LKM [ Not found ] Dica-Kit Rootkit [ Not found ] Dreams Rootkit [ Not found ] Duarawkz Rootkit [ Not found ] Ebury backdoor [ Not found ] Enye LKM [ Not found ] Flea Linux Rootkit [ Not found ] Fu Rootkit [ Not found ] Fuck`it Rootkit [ Not found ] GasKit Rootkit [ Not found ] Heroin LKM [ Not found ] HjC Kit [ Not found ] ignoKit Rootkit [ Not found ] IntoXonia-NG Rootkit [ Not found ] Irix Rootkit [ Not found ] Jynx Rootkit [ Not found ] Jynx2 Rootkit [ Not found ] KBeast Rootkit [ Not found ] Kitko Rootkit [ Not found ] Knark Rootkit [ Not found ] ld-linuxv.so Rootkit [ Not found ] Li0n Worm [ Not found ] Lockit / LJK2 Rootkit [ Not found ] Mokes backdoor [ Not found ] Mood-NT Rootkit [ Not found ] MRK Rootkit [ Not found ] Ni0 Rootkit [ Not found ] Ohhara Rootkit [ Not found ] Optic Kit (Tux) Worm [ Not found ] Oz Rootkit [ Not found ] Phalanx Rootkit [ Not found ] Phalanx2 Rootkit [ Not found ] Phalanx2 Rootkit (extended tests) [ Not found ] Portacelo Rootkit [ Not found ] R3dstorm Toolkit [ Not found ] RH-Sharpe's Rootkit [ Not found ] RSHA's Rootkit [ Not found ] Scalper Worm [ Not found ] Sebek LKM [ Not found ] Shutdown Rootkit [ Not found ] SHV4 Rootkit [ Not found ] SHV5 Rootkit [ Not found ] Sin Rootkit [ Not found ] Slapper Worm [ Not found ] Sneakin Rootkit [ Not found ] 'Spanish' Rootkit [ Not found ] Suckit Rootkit [ Not found ] Superkit Rootkit [ Not found ] TBD (Telnet BackDoor) [ Not found ] TeLeKiT Rootkit [ Not found ] T0rn Rootkit [ Not found ] trNkit Rootkit [ Not found ] Trojanit Kit [ Not found ] Tuxtendo Rootkit [ Not found ] URK Rootkit [ Not found ] Vampire Rootkit [ Not found ] VcKit Rootkit [ Not found ] Volc Rootkit [ Not found ] Xzibit Rootkit [ Not found ] zaRwT.KiT Rootkit [ Not found ] ZK Rootkit [ Not found ][Press <ENTER> to continue] Performing additional rootkit checks Suckit Rootkit additional checks [ OK ] Checking for possible rootkit files and directories [ None found ] Checking for possible rootkit strings [ None found ] Performing malware checks Checking running processes for suspicious files [ None found ] Checking for login backdoors [ None found ] Checking for sniffer log files [ None found ] Checking for suspicious directories [ None found ] Checking for suspicious (large) shared memory segments [ None found ] Checking for Apache backdoor [ Not found ] Performing Linux specific checks Checking loaded kernel modules [ OK ] Checking kernel module names [ OK ][Press <ENTER> to continue]Checking the network... Performing checks on the network ports Checking for backdoor ports [ None found ] Performing checks on the network interfaces Checking for promiscuous interfaces [ None found ]Checking the local host... Performing system boot checks Checking for local host name [ Found ] Checking for system startup files [ Found ] Checking system startup files for malware [ None found ] Performing group and account checks Checking for passwd file [ Found ] Checking for root equivalent (UID 0) accounts [ None found ] Checking for passwordless accounts [ None found ] Checking for passwd file changes [ None found ] Checking for group file changes [ None found ] Checking root account shell history files [ OK ] Performing system configuration file checks Checking for an SSH configuration file [ Found ] Checking if SSH root access is allowed [ Warning ] Checking if SSH protocol v1 is allowed [ Warning ] Checking for other suspicious configuration settings [ None found ] Checking for a running system logging daemon [ Found ] Checking for a system logging configuration file [ Found ] Checking if syslog remote logging is allowed [ Not allowed ] Performing filesystem checks Checking /dev for suspicious file types [ Warning ] Checking for hidden files and directories [ Warning ][Press <ENTER> to continue]System checks summary=====================File properties checks... Required commands check failed Files checked: 127 Suspect files: 5Rootkit checks... Rootkits checked : 496 Possible rootkits: 0Applications checks... All checks skippedThe system checks took: 5 minutes and 43 secondsAll results have been written to the log file: /var/log/rkhunter.logOne or more warnings have been found while checking the system.Please check the log file (/var/log/rkhunter.log)
解读：每项检测结果都高亮显示，绿色表示正常，红色表示需要引起关注，上面的检测需要与用户交互输入“回车”，可以使用–sk选项使其自动检测：
[root@master rkhunter-1.4.6]# rkhunter –check –skip-keypress
3、定时检测
Linux终端使用rkhunter来检测，最大的好处在于每项的检测结果都有不同的颜色显示，如果是绿色的表示没有问题，如果是红色的，那就要引起关注了。另外，在上面执行检测的过程中，在每个部分检测完成后，需要以Enter键来继续。如果要让程序自动运行，可以执行如下命令：
30 09 * * * root /usr/local/bin/rkhunter –check –cronjob
解读：rkhunter检测程序就会在每天的9:30分运行一次。
4、安全更新
测试是否存在漏洞，执行以下命令：
$ env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”
vulnerable
this is a test
如果显示如上，那么，很遗憾，必须立即打上安全补丁修复，
临时解决办法为：
yum -y update bash
升级bash后，执行测试：
$ env x='() { :;}; echo vulnerable’ bash -c “echo this is a test”
bash: warning: x: ignoring function definition attempt
bash: error importing function definition for `x’
this is a test
如果显示如上，表示已经修补了漏洞。
