{"id":64,"date":"2013-05-24T01:08:00","date_gmt":"2013-05-23T16:08:00","guid":{"rendered":"http:\/\/yokensaka.com\/centos\/?p=64"},"modified":"2014-07-19T20:06:01","modified_gmt":"2014-07-19T11:06:01","slug":"rootkit%e6%a4%9c%e7%9f%a5%e3%83%84%e3%83%bc%e3%83%abchkrootkit","status":"publish","type":"post","link":"http:\/\/yokensaka.com\/centos\/?p=64","title":{"rendered":"rootkit\u691c\u77e5\u30c4\u30fc\u30eb(chkrootkit)"},"content":{"rendered":"<p>chkrootkit \u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306brootkit\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u691c\u67fb\u3057\u3066\u304f\u308c\u308b\u30c4\u30fc\u30eb\u3002 rootkit \u3068\u306f\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u306e\u75d5\u8de1\u3092\u6d88\u3057\u53bb\u308a\u3001\u305d\u308c\u3092\u96a0\u307a\u3044\u3057\u3001\u3055\u3089\u306a\u308b\u6a19\u7684\u3092\u653b\u6483\u3059\u308b\u3053\u3068\u3092\u53ef\u80fd\u3068\u3059\u308b\u30c4\u30fc\u30eb\u7fa4\u3002 chkrootkit \u306f\u3001\u3044\u304f\u3064\u304b\u306e rootkit \u3092\u691c\u51fa\u3067\u304d\u308b\u304c\u3001 \u691c\u51fa\u3057\u3066\u3082\u99c6\u9664\u3059\u308b\u6a5f\u80fd\u306f\u306a\u3044\u3002\u3057\u304b\u3057\u4e0d\u6b63\u4fb5\u5165\u691c\u77e5\u306b\u306f\u5f79\u7acb\u3064\u3002<br \/>\n<b>\u25a0chkrootkit\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/b><\/p>\n<pre>\r\nchkrootkit\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\r\n[root@server1 ~]# yum -y install chkrootkit\r\n<\/pre>\n<p><b>\u25a0chkrootkit\u306e\u5b9f\u884c<\/b><\/p>\n<pre>\r\nchkrootkit\u3092\u5b9f\u884c\r\n[root@linux ~]# chkrootkit\r\nROOTDIR is `\/'\r\nChecking `amd'... not found\r\nChecking `basename'... not infected\r\nChecking `biff'... not found\r\nChecking `chfn'... not infected\r\n\u30fb\r\n\u30fb\r\n\u30fb\r\nChecking `scalper'... not infected\r\nChecking `slapper'... not infected\r\nChecking `z2'... user root deleted or never logged from lastlog!\r\nChecking `chkutmp'... chkutmp: nothing deleted\r\n[root@server1 ~]# chkrootkit | grep INFECTED\r\n\u5b9f\u884c\u7d50\u679c\u4e2d\u306b\"INFECTED\"\u3068\u3044\u3046\u884c\u304c\u306a\u3051\u308c\u3070\u554f\u984c\u306a\u3044\r\n<\/pre>\n<p><b>\u25a0chkrootkit\u306e\u5b9a\u671f\u81ea\u52d5\u5b9f\u884c\u8a2d\u5b9a<\/b><br \/>\nrootkit\u3092\u767a\u898b\u3057\u305f\u3068\u304droot\u5b9b\u306b\u30e1\u30fc\u30eb\u304c\u6765\u308b\u3088\u3046\u306b\u8a2d\u5b9a<\/p>\n<pre>\r\nchkrootkit\u306e\u5b9f\u884c\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f5c\u6210\r\n[root@server1 ~]# vi \/root\/chkrootkit\r\n#!\/bin\/sh\r\n\/usr\/bin\/chkrootkit &gt; \/var\/log\/chkrootkit_log\r\ngrep \"INFECTED\" \/var\/log\/chkrootkit_log\r\nchmod 600 \/var\/log\/chkrootkit_log\r\nchkrootkit\u306e\u5b9f\u884c\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u5b9f\u884c\u6a29\u9650\u3092\u4e0e\u3048\u308b\r\n[root@server1 ~]# chmod 700 chkrootkit\r\nchkrootkit\u5b9f\u884c\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u6bce\u65e5\u81ea\u52d5\u5b9f\u884c\u3055\u308c\u308b\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u79fb\u52d5\r\n[root@server1 ~]# mv chkrootkit \/etc\/cron.daily\/\r\n<\/pre>\n<p><b>\u25a0chkrootkit\u3067\u4f7f\u7528\u3059\u308b\u30b3\u30de\u30f3\u30c9\u7fa4\u306e\u30b3\u30d4\u30fc<\/b><br \/>\nchkrootkit\u304c\u4f7f\u7528\u3059\u308b\u30b3\u30de\u30f3\u30c9\u7fa4\u3092\u30b3\u30d4\u30fc\u3057\u3066\u304a\u304d\u3001\u5fc5\u8981\u306a\u5834\u5408\u306b\u305d\u306e\u30b3\u30de\u30f3\u30c9\u7fa4\u3067chkrootkit\u3092\u5b9f\u884c\u3059\u308b\u3002<\/p>\n<pre>\r\nchkrootkit\u3067\u4f7f\u7528\u3059\u308b\u30b3\u30de\u30f3\u30c9\u7fa4\u306e\u9000\u907f\u5148\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u4f5c\u6210\r\n[root@server1 ~]# mkdir chkrootkitcmd\r\nchkrootkit\u3067\u4f7f\u7528\u3059\u308b\u30b3\u30de\u30f3\u30c9\u7fa4\u3092\u9000\u907f\u5148\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u30b3\u30d4\u30fc\r\n[root@server1 ~]# cp `which --skip-alias awk cut echo egrep find head id ls netstat ps strings sed uname` chkrootkitcmd\/\r\n\u9000\u907f\u3057\u305fchkrootkit\u3067chkrootkit\u5b9f\u884c\r\n[root@server1 ~]# chkrootkit -p \/root\/chkrootkitcmd|grep INFECTED\r\nchkrootkit\u3067\u4f7f\u7528\u3059\u308b\u30b3\u30de\u30f3\u30c9\u7fa4\u306e\u9000\u907f\u5148\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u5727\u7e2e\r\n[root@server1 ~]# zip -r chkrootkitcmd.zip chkrootkitcmd\/\r\nadding: chkrootkitcmd\/ (stored 0%)\r\nadding: chkrootkitcmd\/id (deflated 55%)\r\nadding: chkrootkitcmd\/egrep (deflated 49%)\r\nadding: chkrootkitcmd\/sed (deflated 54%)\r\nadding: chkrootkitcmd\/netstat (deflated 58%)\r\nadding: chkrootkitcmd\/echo (deflated 54%)\r\nadding: chkrootkitcmd\/find (deflated 50%)\r\nadding: chkrootkitcmd\/awk (deflated 51%)\r\nadding: chkrootkitcmd\/head (deflated 53%)\r\nadding: chkrootkitcmd\/strings (deflated 53%)\r\nadding: chkrootkitcmd\/ps (deflated 59%)\r\nadding: chkrootkitcmd\/uname (deflated 55%)\r\nadding: chkrootkitcmd\/ls (deflated 53%)\r\nadding: chkrootkitcmd\/cut (deflated 53%)\r\n\u9000\u907f\u5148\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u524a\u9664\r\n[root@server1 ~]# rm -rf chkrootkitcmd\r\n\u5727\u7e2e\u3057\u305fzip\u30d5\u30a1\u30a4\u30eb\u3092\u9001\u4fe1\u3059\u308b\u306e\u306b\u5fc5\u8981\u306auuencode\u30b3\u30de\u30f3\u30c9\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\r\n[root@server1 ~]# yum -y install sharutils\r\nLoaded plugins: fastestmirror, refresh-packagekit\r\nLoading mirror speeds from cached hostfile\r\n* base: ftp.jaist.ac.jp\r\n* centosplus: ftp.jaist.ac.jp\r\n* epel: ftp.jaist.ac.jp\r\n* extras: ftp.jaist.ac.jp\r\n* updates: mirror.khlug.org\r\nSetting up Install Process\r\nResolving Dependencies\r\n--&gt; Running transaction check\r\n---&gt; Package sharutils.i686 0:4.7-6.1.el6 set to be updated\r\n--&gt; Finished Dependency Resolution\r\nDependencies Resolved\r\n===================================================================================================================\r\nPackage                      Arch                    Version                        Repository               Size\r\n===================================================================================================================\r\nInstalling:\r\nsharutils                    i686                    4.7-6.1.el6                    base                    186 k\r\nTransaction Summary\r\n===================================================================================================================\r\nInstall       1 Package(s)\r\nUpgrade       0 Package(s)\r\nTotal download size: 186 k\r\nInstalled size: 609 k\r\nDownloading Packages:\r\nsharutils-4.7-6.1.el6.i686.rpm                                                              | 186 kB     00:00\r\nRunning rpm_check_debug\r\nRunning Transaction Test\r\nTransaction Test Succeeded\r\nRunning Transaction\r\nInstalling     : sharutils-4.7-6.1.el6.i686                                                                  1\/1\r\nInstalled:\r\nsharutils.i686 0:4.7-6.1.el6\r\nComplete!\r\n\u5727\u7e2e\u3057\u305fzip\u30d5\u30a1\u30a4\u30eb\u3092root\u5b9b\u306b\u30e1\u30fc\u30eb\u9001\u4fe1\r\n[root@server1 ~]# uuencode chkrootkitcmd.zip chkrootkitcmd.zip|mail root\r\n\u5727\u7e2e\u3057\u305fzip\u30d5\u30a1\u30a4\u30eb\u3092\u524a\u9664\r\n[root@server1 ~]# rm -f chkrootkitcmd.zip\r\n<\/pre>\n<p><b>\u25a0chkrootkit\u306e\u4fee\u6b63<\/b><br \/>\nSuckit \u306b\u3088\u308b \/sbin\/init \u306e\u6539\u3056\u3093\u8aa4\u691c\u77e5\u5bfe\u7b56\u3002<br \/>\nrpm -V `rpm -qf \/sbin\/init` \u3092\u5b9f\u884c\u3057\u3001\u306a\u306b\u3082\u8868\u793a\u3055\u308c\u306a\u304b\u3063\u305f\u3089\u672a\u691c\u51fa\u3068\u3059\u308b\u3002<br \/>\n\u8d64\u5b57\u306e\u90e8\u5206\u304c\u8ffd\u52a0<\/p>\n<pre>\r\n[root@server1 ~]# vi \/usr\/lib64\/chkrootkit-0.49\/chkrootkit\r\n### Suckit\r\nif [ -f ${ROOTDIR}sbin\/init ]; then\r\nif [ \"${QUIET}\" != \"t\" ];then printn \"Searching for Suckit rootkit... \"; fi\r\nif [ ${SYSTEM} != \"HP-UX\" ] && ( ${strings} ${ROOTDIR}sbin\/init | ${egrep} HOME  || \\\r\ncat ${ROOTDIR}\/proc\/1\/maps | ${egrep} \"init.\" ) >\/dev\/null 2>&1\r\nthen\r\n<span style=\"color: #FF0000;\">if ! rpm -V `rpm -qf \/sbin\/init` >\/dev\/null 2>&1;<\/span>\r\n<span style=\"color: #FF0000;\">then<\/span>\r\necho \"Warning: ${ROOTDIR}sbin\/init INFECTED\"\r\n<span style=\"color: #FF0000;\">fi<\/span>\r\nelse\r\nif [ -d ${ROOTDIR}\/dev\/.golf ]; then\r\necho \"Warning: Suspect directory ${ROOTDIR}dev\/.golf\"\r\nelse\r\nif [ \"${QUIET}\" != \"t\" ]; then echo \"nothing found\"; fi\r\nfi\r\nfi\r\nfi\r\n<\/pre>\n<div align=right><a href=\"#\">\u25b2 \u30da\u30fc\u30b8\u30c8\u30c3\u30d7\u3078<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>chkrootkit \u306f\u3001\u30b7\u30b9\u30c6\u30e0\u306brootkit\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u306a\u3044\u304b\u3092\u691c\u67fb\u3057 &hellip; <a href=\"http:\/\/yokensaka.com\/centos\/?p=64\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-64","post","type-post","status-publish","format-standard","hentry","category-rootkitchkrootkit"],"_links":{"self":[{"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=\/wp\/v2\/posts\/64","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=64"}],"version-history":[{"count":1,"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions"}],"predecessor-version":[{"id":220,"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=\/wp\/v2\/posts\/64\/revisions\/220"}],"wp:attachment":[{"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=64"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=64"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yokensaka.com\/centos\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=64"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}