????chkrootkit????????????????chkrootkit??????????????????????????????????????
[root@server chkrootkit]# /usr/local/chkrootkit/chkrootkit
Checking `ifconfig'... INFECTED
Checking `ls'... INFECTED
Checking `login'... INFECTED
Checking `netstat'... INFECTED
Checking `ps'... INFECTED
Checking `top'... INFECTED
Checking `sshd'... not infected
Checking `syslogd'... not tested
Checking `tar'... not infected
Checking `tcpd'... not infected
Checking `tcpdump'... not infected
Checking `telnetd'... not found
????????????????????????ifconfig??ls??login??netstat??ps??top?????????????????????rootkit?????????????Ч?????????????????°??????
????4??chkrootkit?????
????chkrootkit????rootkit???????????????????????????????????????????????????????????????????????????滻?????chkrootkit???????????????????????????chkrootkit??????????????????????????????????chkrootkit????????????б???????????????????????????????chkrootkit??rootkit???м???????????????????????????
????[root@server ~]# mkdir /usr/share/.commands
????[root@server ~]# cp `which --skip-alias awk cut echo find egrep id head ls netstat ps strings sed uname` /usr/share/.commands
????[root@server ~]# /usr/local/chkrootkit/chkrootkit -p /usr/share/.commands/
????[root@server share]# cd /usr/share/
????[root@server share]# tar zcvf commands.tar.gz .commands
????[root@server share]#  rm -rf commands.tar.gz
??????????β???????/usr/share/??????????.commands????????????chkrootkit????????????б???????????????????????????.commands???????????????????????????????б????????????????????????????????????????????????????·???￡???????chkrootkit?????“-p”??????????·?????м???ɡ?
????????rootkit????????RKHunter
????RKHunter??????????????????rootkit?????????????????е??????????????????????rootkit?????????????У?RKHunter?????????????У?
????MD5У????????????????и??
???????rootkit???????????????????
??????????????????????????
????????ó????????????????
????????????????
??????????????
?????????????????LKM
??????????????????????
?????????????????RKHunter????????á?
????1?????RKHunter
????RKHunter?????????????http://www.rootkit.nl/projects/rootkit_hunter.html?????????????????RKHunter???????????汾??rkhunter-1.4.0.tar.gz??RKHunter??????????????????￡?
????[root@server ~]# ls
????rkhunter-1.4.0.tar.gz
????[root@server ~]# pwd
????/root
????[root@server ~]# tar -zxvf rkhunter-1.4.0.tar.gz
????[root@server ~]# cd rkhunter-1.4.0
????[root@server rkhunter-1.4.0]# ./installer.sh  --layout default --install
???????????RKHunter????????????rkhunter???????????/usr/local/bin?????
????2?????rkhunter???
????rkhunter?????????????????÷?????????????rkhunter???????????????÷??????????????rkhunter??????????????
????[root@server ~]#/usr/local/bin/rkhunter–help
????Rkhunter???ò???????????????????
????????             ????
????-c?? –check??????????????????
????–configfile <file>???????????????
????–cronjob???cron??????????
????–sk?? –skip-keypress?????????м??????????????
????–summary????????????????
????–update??????????
????-V?? –version????汾???
????–versioncheck????°汾
?????????????rkhunter????????????????
[root@server rkhunter-1.4.0]# /usr/local/bin/rkhunter   -c
[ Rootkit Hunter version 1.4.0 ]
#??????????????????????????飬??????????????????????????Щ????????rootkit?????????OK????????????????Warning????????????????????????“Not found”????????????????
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 ]
/sbin/chkconfig                                       [ OK ]
....(??)....
[Press <ENTER> to continue]
#???????????????????????rootkit???????“Not found”?????δ?????rootkit
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 ]
....(??)....
[Press <ENTER> to continue]