{"id":32186,"date":"2025-03-04T09:39:07","date_gmt":"2025-03-04T01:39:07","guid":{"rendered":"https:\/\/www.yunshan.net\/blog\/?p=32186"},"modified":"2025-03-04T09:39:07","modified_gmt":"2025-03-04T01:39:07","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-ebpf-%e8%bf%9b%e8%a1%8c%e6%81%b6%e6%84%8f%e8%bd%af%e4%bb%b6%e6%a3%80%e6%b5%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.yunshan.net\/blog\/archives\/32186.html","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 eBPF \u8fdb\u884c\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\uff1f"},"content":{"rendered":"

\n

\"\u5982\u4f55\u4f7f\u7528<\/p>\n<\/p>\n

\u524d\u8a00<\/strong>
\n\u5728\u7f51\u7edc\u5b89\u5168\u5a01\u80c1\u65e5\u76ca\u590d\u6742\u7684\u4eca\u5929\uff0c\u4f20\u7edf\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u6280\u672f\u9010\u6e10\u66b4\u9732\u51fa\u6027\u80fd\u74f6\u9888\u548c\u7075\u6d3b\u6027\u4e0d\u8db3\u7684\u95ee\u9898\u3002\u4ece\u57fa\u4e8e\u7b7e\u540d\u7684\u9759\u6001\u5206\u6790\u5230\u884c\u4e3a\u76d1\u63a7\u6c99\u7bb1\uff0c\u9632\u5fa1\u624b\u6bb5\u9700\u8981\u4e0d\u65ad\u8fdb\u5316\u624d\u80fd\u5e94\u5bf9\u65e0\u6587\u4ef6\u653b\u51fb\u3001\u96f6\u65e5\u6f0f\u6d1e\u5229\u7528\u7b49\u65b0\u578b\u5a01\u80c1\u3002\u800ceBPF<\/a>\uff08Extended Berkeley Packet Filter\uff09<\/strong>\u4f5c\u4e3aLinux\u5185\u6838\u7684\u9769\u547d\u6027\u6280\u672f\uff0c\u51ed\u501f\u5176\u9ad8\u6027\u80fd\u3001\u4f4e\u5f00\u9500\u3001\u52a8\u6001\u53ef\u7f16\u7a0b<\/strong>\u7684\u7279\u6027\uff0c\u6b63\u5728\u6210\u4e3a\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u9886\u57df\u7684\u65b0\u5229\u5668\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u5229\u7528eBPF<\/a>\u5b9e\u73b0\u4ece\u7cfb\u7edf\u8c03\u7528\u8ffd\u8e2a\u5230\u7f51\u7edc\u884c\u4e3a\u5206\u6790\u7684\u5168\u6808\u5f0f\u5a01\u80c1\u68c0\u6d4b<\/strong>\uff0c\u5e76\u901a\u8fc7\u5b9e\u9645\u6848\u4f8b\u63ed\u793a\u5176\u6280\u672f\u4f18\u52bf\u4e0e\u5e94\u7528\u573a\u666f\u3002<\/p>\n

\n

\u4e00\u3001eBPF\uff1a\u91cd\u65b0\u5b9a\u4e49\u5185\u6838\u7ea7\u53ef\u89c2\u6d4b\u6027<\/strong><\/h3>\n

eBPF\u6700\u521d\u8bbe\u8ba1\u7528\u4e8e\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\uff0c\u4f46\u7ecf\u8fc7\u591a\u5e74\u53d1\u5c55\uff0c\u5176\u80fd\u529b\u5df2\u6269\u5c55\u81f3\u7cfb\u7edf\u8c03\u7528\u8ddf\u8e2a\u3001\u6027\u80fd\u5206\u6790\u3001\u5b89\u5168\u76d1\u63a7\u7b49\u573a\u666f\u3002\u5b83\u7684\u6838\u5fc3\u4f18\u52bf\u5728\u4e8e\u65e0\u9700\u4fee\u6539\u5185\u6838\u6e90\u7801\u5373\u53ef\u52a8\u6001\u6ce8\u5165\u76d1\u63a7\u903b\u8f91<\/strong>\u3002\u901a\u8fc7\u9a8c\u8bc1\u673a\u5236\u786e\u4fdd\u7a0b\u5e8f\u7684\u5b89\u5168\u6027\u540e\uff0ceBPF\u5b57\u8282\u7801\u4f1a\u88ab\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u4e3a\u673a\u5668\u7801\uff0c\u4ee5\u5185\u6838\u539f\u751f\u901f\u5ea6\u8fd0\u884c\u2014\u2014\u8fd9\u79cd\u7279\u6027\u4f7f\u5176\u80fd\u591f\u5b9e\u65f6\u6355\u83b7\u6076\u610f\u884c\u4e3a\uff0c\u800c\u4f20\u7edf\u5de5\u5177\u5982strace<\/code>\u6216sysdig<\/code>\u56e0\u6027\u80fd\u5f00\u9500\u8fc7\u5927\uff0c\u5f80\u5f80\u65e0\u6cd5\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u6301\u7eed\u542f\u7528\u3002<\/p>\n

\u901a\u8fc7\u6302\u94a9execve\u7cfb\u7edf\u8c03\u7528<\/strong>\uff0ceBPF\u7a0b\u5e8f\u53ef\u4ee5\u5b9e\u65f6\u8bb0\u5f55\u8fdb\u7a0b\u542f\u52a8\u884c\u4e3a\u3002\u5f53\u68c0\u6d4b\u5230\/tmp<\/code>\u76ee\u5f55\u4e0b\u7a81\u7136\u51fa\u73b0\u5f02\u5e38\u7684\u53ef\u6267\u884c\u6587\u4ef6\uff08\u5982\u901a\u8fc7curl<\/code>\u4e0b\u8f7d\u7684\u811a\u672c\uff09\uff0c\u5373\u53ef\u89e6\u53d1\u544a\u8b66\u3002\u8fd9\u79cd\u7ec6\u7c92\u5ea6\u76d1\u63a7\u80fd\u529b\u5bf9\u4e8e\u68c0\u6d4b\u65e0\u6587\u4ef6\u653b\u51fb\u6216\u4f9b\u5e94\u94fe\u6c61\u67d3\u653b\u51fb\u5c24\u4e3a\u6709\u6548\u3002<\/p>\n

\n

\u4e8c\u3001eBPF\u7528\u4e8e\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u7684\u56db\u5927\u6838\u5fc3\u573a\u666f<\/strong><\/h3>\n

1. \u7cfb\u7edf\u8c03\u7528\u5e8f\u5217\u5206\u6790<\/strong><\/h4>\n

\u6076\u610f\u8f6f\u4ef6\u7684\u884c\u4e3a\u6a21\u5f0f\u901a\u5e38\u4f1a\u5728\u7cfb\u7edf\u8c03\u7528\u5c42\u9762\u7559\u4e0b\u75d5\u8ff9\u3002\u4f8b\u5982\uff1a<\/p>\n

    \n
  • \u52d2\u7d22\u8f6f\u4ef6<\/strong>\u4f1a\u9891\u7e41\u8c03\u7528\u6587\u4ef6\u8bfb\u5199\uff08read<\/code>\/write<\/code>\uff09\u548c\u52a0\u5bc6\u76f8\u5173\u51fd\u6570\uff08\u5982libssl<\/code>\u7684EVP_EncryptUpdate<\/code>\uff09\n<\/li>\n
  • \u6316\u77ff\u6728\u9a6c<\/strong>\u4f1a\u901a\u8fc7clone<\/code>\u6216fork<\/code>\u521b\u5efa\u5927\u91cf\u5b50\u8fdb\u7a0b\u6d88\u8017CPU\u8d44\u6e90
    \n\u901a\u8fc7eBPF\u7684tracepoint<\/code>\u6216kprobe<\/code>\u6302\u94a9\u5173\u952e\u7cfb\u7edf\u8c03\u7528\uff0c\u7ed3\u5408\u89c4\u5219\u5f15\u64ce\uff08\u5982Falco\uff09\u6216\u673a\u5668\u5b66\u4e60\u6a21\u578b\uff0c\u53ef\u6784\u5efa\u884c\u4e3a\u57fa\u7ebf\u6a21\u578b<\/strong>\uff0c\u8bc6\u522b\u504f\u79bb\u6b63\u5e38\u6a21\u5f0f\u7684\u5f02\u5e38\u6d3b\u52a8\u3002\n<\/li>\n<\/ul>\n

    2. \u7f51\u7edc\u6d41\u91cf\u6df1\u5ea6\u89e3\u6790<\/strong><\/h4>\n

    eBPF\u7684XDP\uff08eXpress Data Path\uff09<\/code>\u6846\u67b6\u5141\u8bb8\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u76f4\u63a5\u5904\u7406\u6570\u636e\u5305\u3002\u8fd9\u4e00\u7279\u6027\u53ef\u7528\u4e8e\uff1a<\/p>\n

      \n
    • \u68c0\u6d4bC2\u670d\u52a1\u5668\u7684DNS\u67e5\u8be2\u6a21\u5f0f\uff08\u5982\u57df\u540d\u7684\u968f\u673a\u5b57\u7b26\u7ec4\u5408\uff09\n<\/li>\n
    • \u8bc6\u522b\u52a0\u5bc6\u901a\u4fe1\u4e2d\u7684\u534f\u8bae\u6307\u7eb9\uff08\u5982\u6076\u610f\u8f6f\u4ef6\u5e38\u7528\u7684\u975e\u6807\u51c6TLS\u63e1\u624b\uff09\n<\/li>\n
    • \u62e6\u622a\u4e0e\u5df2\u77e5\u5a01\u80c1\u60c5\u62a5\uff08IoC\uff09\u5339\u914d\u7684IP\/\u57df\u540d\u901a\u4fe1\n<\/li>\n<\/ul>\n

      \u5f00\u6e90\u9879\u76eeCilium<\/code>\u5df2\u8bc1\u660e\uff0c\u5728eBPF\u52a0\u6301\u4e0b\uff0c\u5fae\u670d\u52a1\u95f4\u7684\u7f51\u7edc\u7b56\u7565\u6267\u884c\u5ef6\u8fdf\u53ef\u964d\u4f4e\u81f3\u5fae\u79d2\u7ea7\uff0c\u4e3a\u5b9e\u65f6\u963b\u65ad\u6076\u610f\u6d41\u91cf\u63d0\u4f9b\u4e86\u53ef\u80fd\u3002<\/p>\n

      3. \u5185\u5b58\u653b\u51fb\u68c0\u6d4b<\/strong><\/h4>\n

      \u9488\u5bf9\u5806\u55b7\u5c04\uff08Heap Spraying\uff09\u3001ROP\u94fe\u5229\u7528\u7b49\u9ad8\u7ea7\u653b\u51fb\uff0ceBPF\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u589e\u5f3a\u9632\u62a4\uff1a<\/p>\n

        \n
      • \u76d1\u63a7\u654f\u611f\u5185\u5b58\u533a\u57df\uff08\u5982__user<\/code>\u7a7a\u95f4\uff09\u7684\u975e\u6cd5\u5199\u5165\n<\/li>\n
      • \u8ddf\u8e2a\u8fdb\u7a0b\u7684mprotect<\/code>\u8c03\u7528\uff0c\u53d1\u73b0\u7a81\u7136\u5c06\u5185\u5b58\u9875\u6807\u8bb0\u4e3a\u53ef\u6267\u884c\uff08W^X\u7b56\u7565\u7ed5\u8fc7\uff09\u7684\u884c\u4e3a\n<\/li>\n
      • \u7ed3\u5408BTF\uff08BPF Type Format\uff09<\/code>\u5b9e\u73b0\u7ed3\u6784\u4f53\u5185\u5b58\u5e03\u5c40\u5206\u6790\uff0c\u8bc6\u522b\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u5c1d\u8bd5\n<\/li>\n<\/ul>\n

        4. \u9690\u853d\u4fe1\u9053\u53d1\u73b0<\/strong><\/h4>\n

        \u9ad8\u7ea7\u6301\u7eed\u6027\u5a01\u80c1\uff08APT\uff09\u5e38\u901a\u8fc7DNS\u96a7\u9053\u6216HTTP\u4f2a\u88c5\u4f20\u8f93\u6570\u636e\u3002\u57fa\u4e8eeBPF\u7684\u6d41\u91cf\u65f6\u5e8f\u5206\u6790<\/strong>\u80fd\u8bc6\u522b\u5f02\u5e38\u6a21\u5f0f\uff1a<\/p>\n

          \n
        • \u6570\u636e\u5305\u5927\u5c0f\u5448\u73b0\u89c4\u5f8b\u6027\u5206\u5e03\uff08\u5982\u6309\u5b57\u8282\u7f16\u7801\u7684DNS exfiltration\uff09\n<\/li>\n
        • \u5fc3\u8df3\u5305\u95f4\u9694\u4e0e\u6b63\u5e38\u534f\u8bae\uff08\u5982HTTP\/2\uff09\u660e\u663e\u4e0d\u7b26\n<\/li>\n<\/ul>\n
          \n

          \u4e09\u3001\u5b9e\u6218\u6848\u4f8b\uff1a\u7528eBPF\u6355\u6349Mimikatz\u653b\u51fb<\/strong><\/h3>\n

          \u4ee5\u7ecf\u5178\u7684\u51ed\u8bc1\u7a83\u53d6\u5de5\u5177Mimikatz\u4e3a\u4f8b\uff0c\u5176\u6267\u884c\u65f6\u4f1a\u89e6\u53d1\u4ee5\u4e0b\u7279\u5f81\u884c\u4e3a\uff1a<\/p>\n

            \n
          1. \u901a\u8fc7OpenProcess<\/code>\u8bbf\u95eelsass.exe<\/code>\u8fdb\u7a0b\u5185\u5b58\n<\/li>\n
          2. \u8c03\u7528ReadProcessMemory<\/code>\u63d0\u53d6\u654f\u611f\u6570\u636e\n<\/li>\n
          3. \u4f7f\u7528CryptProtectMemory<\/code>\u5c1d\u8bd5\u89e3\u5bc6\u7f13\u5b58\n<\/li>\n<\/ol>\n

            \u901a\u8fc7\u90e8\u7f72eBPF\u7a0b\u5e8f\u76d1\u63a7Windows\u5b50\u7cfb\u7edf\uff08WSL\uff09\u6216Linux\u7cfb\u7edf\u7684\u76f8\u5173API\u8c03\u7528\uff08\u9700\u7ed3\u5408\u5b50\u7cfb\u7edf\u9002\u914d\uff09\uff0c\u53ef\u6784\u9020\u5982\u4e0b\u68c0\u6d4b\u903b\u8f91\uff1a<\/p>\n

            SEC("tracepoint\/syscalls\/sys_enter_ptrace")  \r\nint trace_ptrace(struct trace_event_raw_sys_enter* ctx) {  \r\nu64 pid = bpf_get_current_pid_tgid() >> 32;  \r\nchar comm[16];  \r\nbpf_get_current_comm(&comm, sizeof(comm));  \r\n  \r\n\/\/ \u68c0\u6d4b\u975e\u8c03\u8bd5\u5668\u8fdb\u7a0b\u7684ptrace\u8c03\u7528  \r\nif (comm[0] != 'g' || comm[1] != 'd' || comm[2] != 'b') {  \r\nbpf_printk("\u53ef\u7591\u7684ptrace\u8c03\u7528\u6765\u81ea\u8fdb\u7a0b %s (PID %d)", comm, pid);  \r\n}  \r\nreturn 0;  \r\n}  \r\n<\/code><\/pre>\n
            \u6b64\u7a0b\u5e8f\u4f1a\u8bb0\u5f55\u6240\u6709\u975e\u5e38\u89c4\u8c03\u8bd5\u5668\u53d1\u8d77\u7684ptrace<\/code>\u8c03\u7528\uff08Mimikatz\u4f9d\u8d56\u6b64\u7c7b\u64cd\u4f5c\u63d0\u53d6\u5185\u5b58\uff09\uff0c\u5e76\u4e0e\u8fdb\u7a0b\u767d\u540d\u5355\u6bd4\u5bf9\u751f\u6210\u544a\u8b66\u3002<\/p>\n
            \n
            \u56db\u3001\u6311\u6218\u4e0e\u6700\u4f73\u5b9e\u8df5<\/strong><\/h3>\n
            \u5c3d\u7ba1eBPF\u6f5c\u529b\u5de8\u5927\uff0c\u4f46\u5728\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u4e2d\u4ecd\u9700\u6ce8\u610f\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n
              \n
            • \u5185\u6838\u7248\u672c\u517c\u5bb9\u6027<\/strong>\uff1aeBPF\u7279\u6027\u5728\u4e0d\u540cLinux\u53d1\u884c\u7248\u4e2d\u652f\u6301\u7a0b\u5ea6\u4e0d\u4e00\uff0c\u5efa\u8bae\u4f18\u5148\u9009\u62e95.x\u4ee5\u4e0a\u5185\u6838\n<\/li>\n
            • \u7ed5\u8fc7\u98ce\u9669<\/strong>\uff1a\u653b\u51fb\u8005\u53ef\u80fd\u901a\u8fc7\u76f4\u63a5\u5185\u6838\u5bf9\u8c61\u64cd\u4f5c\uff08DKOM\uff09\u6216eBPF\u81ea\u8eab\u6f0f\u6d1e\u89c4\u907f\u76d1\u63a7\uff0c\u9700\u7ed3\u5408\u5b8c\u6574\u6027\u6821\u9a8c\uff08\u5982IMA\uff09\u52a0\u56fa\n<\/li>\n
            • \u6027\u80fd\u8c03\u4f18<\/strong>\uff1a\u907f\u514d\u5728\u5355\u4e2aeBPF\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u8fc7\u591a\u903b\u8f91\uff0c\u53ef\u901a\u8fc7\u73af\u5f62\u7f13\u51b2\u533a\uff08Ring Buffer\uff09<\/code>\u964d\u4f4e\u7528\u6237\u6001-\u5185\u6838\u6001\u4e0a\u4e0b\u6587\u5207\u6362\u5f00\u9500\n<\/li>\n<\/ul>\n
              \u884c\u4e1a\u9886\u5148\u7684\u89e3\u51b3\u65b9\u6848\u5982Falco<\/strong>\u548cTracee<\/strong>\uff0c\u5df2\u91c7\u7528eBPF\u4f5c\u4e3a\u9ed8\u8ba4\u9a71\u52a8\uff0c\u5176\u89c4\u5219\u5e93\u8986\u76d6MITRE ATT&CK\u4e2d\u8d85\u8fc780%\u7684\u6280\u672f\u70b9\uff0c\u53ef\u4f5c\u4e3a\u4f01\u4e1a\u6784\u5efa\u68c0\u6d4b\u4f53\u7cfb\u7684\u53c2\u8003\u3002<\/p>\n
              \n
              \u4e94\u3001\u5c55\u671b\uff1aeBPF\u4e0eAI\u7684\u534f\u540c\u9632\u5fa1<\/strong><\/h3>\n
              eBPF\u7684\u5b9e\u65f6\u6570\u636e\u4f9b\u7ed9\u80fd\u529b\u5c06\u4e0e\u673a\u5668\u5b66\u4e60\u6a21\u578b\u6df1\u5ea6\u878d\u5408\u3002\u4f8b\u5982\uff1a<\/p>\n
                \n
              • \u5229\u7528eBPF\u6536\u96c6\u7684\u7cfb\u7edf\u8c03\u7528\u5e8f\u5217\u8bad\u7ec3LSTM\u5f02\u5e38\u68c0\u6d4b\u6a21\u578b\n<\/li>\n
              • \u5c06\u7f51\u7edc\u6d41\u91cf\u5143\u6570\u636e\uff08\u5982\u8fde\u63a5\u5468\u671f\u3001\u5305\u5927\u5c0f\u5206\u5e03\uff09\u8f93\u5165\u56fe\u795e\u7ecf\u7f51\u7edc\uff08GNN\uff09\u8bc6\u522b\u9690\u853dC2\u901a\u9053
                \n\u8fd9\u79cd\u7ec4\u5408\u4e0d\u4ec5\u80fd\u63d0\u5347\u68c0\u6d4b\u7cbe\u5ea6\uff0c\u8fd8\u80fd\u901a\u8fc7eBPF\u7684\u5373\u65f6\u54cd\u5e94\u673a\u5236\u5b9e\u73b0\u201c\u68c0\u6d4b-\u963b\u65ad\u201d\u95ed\u73af\uff0c\u5c06\u5a01\u80c1\u505c\u7559\u65f6\u95f4\u4ece\u5c0f\u65f6\u7ea7<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
                \u524d\u8a00 \u5728\u7f51\u7edc\u5b89\u5168\u5a01\u80c1\u65e5\u76ca\u590d\u6742\u7684\u4eca\u5929\uff0c\u4f20\u7edf\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u6280\u672f\u9010\u6e10\u66b4\u9732\u51fa\u6027\u80fd\u74f6\u9888\u548c\u7075\u6d3b\u6027\u4e0d\u8db3\u7684\u95ee\u9898\u3002\u4ece\u57fa\u4e8e\u7b7e\u540d\u7684\u9759\u6001\u5206\u6790\u5230\u884c\u4e3a\u76d1\u63a7\u6c99\u7bb1\uff0c\u9632\u5fa1\u624b\u6bb5\u9700\u8981\u4e0d\u65ad\u8fdb\u5316\u624d\u80fd\u5e94\u5bf9\u65e0\u6587\u4ef6\u653b\u51fb\u3001\u96f6\u65e5\u6f0f\u6d1e\u5229\u7528\u7b49\u65b0\u578b\u5a01\u80c1\u3002\u800ceBPF\uff08Extended Berkeley Packet Filter\uff09\u4f5c\u4e3aLinux\u5185\u6838\u7684\u9769\u547d\u6027\u6280\u672f\uff0c\u51ed\u501f\u5176\u9ad8\u6027\u80fd\u3001\u4f4e\u5f00\u9500\u3001\u52a8\u6001\u53ef\u7f16\u7a0b\u7684\u7279\u6027\uff0c\u6b63\u5728\u6210\u4e3a\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u9886\u57df\u7684\u65b0\u5229\u5668\u3002\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u5982\u4f55\u5229\u7528eBPF\u5b9e\u73b0\u4ece\u7cfb\u7edf\u8c03\u7528\u8ffd\u8e2a\u5230\u7f51\u7edc\u884c\u4e3a\u5206\u6790\u7684\u5168\u6808\u5f0f\u5a01\u80c1\u68c0\u6d4b\uff0c\u5e76\u901a\u8fc7\u5b9e\u9645\u6848\u4f8b\u63ed\u793a\u5176\u6280\u672f\u4f18\u52bf\u4e0e\u5e94\u7528\u573a\u666f\u3002 \u4e00\u3001eBPF\uff1a\u91cd\u65b0\u5b9a\u4e49\u5185\u6838\u7ea7\u53ef\u89c2\u6d4b\u6027 eBPF\u6700\u521d\u8bbe\u8ba1\u7528\u4e8e\u7f51\u7edc\u6570\u636e\u5305\u8fc7\u6ee4\uff0c\u4f46\u7ecf\u8fc7\u591a\u5e74\u53d1\u5c55\uff0c\u5176\u80fd\u529b\u5df2\u6269\u5c55\u81f3\u7cfb\u7edf\u8c03\u7528\u8ddf\u8e2a\u3001\u6027\u80fd\u5206\u6790\u3001\u5b89\u5168\u76d1\u63a7\u7b49\u573a\u666f\u3002\u5b83\u7684\u6838\u5fc3\u4f18\u52bf\u5728\u4e8e\u65e0\u9700\u4fee\u6539\u5185\u6838\u6e90\u7801\u5373\u53ef\u52a8\u6001\u6ce8\u5165\u76d1\u63a7\u903b\u8f91\u3002\u901a\u8fc7\u9a8c\u8bc1\u673a\u5236\u786e\u4fdd\u7a0b\u5e8f\u7684\u5b89\u5168\u6027\u540e\uff0ceBPF\u5b57\u8282\u7801\u4f1a\u88ab\u5373\u65f6\u7f16\u8bd1\uff08JIT\uff09\u4e3a\u673a\u5668\u7801\uff0c\u4ee5\u5185\u6838\u539f\u751f\u901f\u5ea6\u8fd0\u884c\u2014\u2014\u8fd9\u79cd\u7279\u6027\u4f7f\u5176\u80fd\u591f\u5b9e\u65f6\u6355\u83b7\u6076\u610f\u884c\u4e3a\uff0c\u800c\u4f20\u7edf\u5de5\u5177\u5982strace\u6216sysdig\u56e0\u6027\u80fd\u5f00\u9500\u8fc7\u5927\uff0c\u5f80\u5f80\u65e0\u6cd5\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u6301\u7eed\u542f\u7528\u3002 \u901a\u8fc7\u6302\u94a9execve\u7cfb\u7edf\u8c03\u7528\uff0ceBPF\u7a0b\u5e8f\u53ef\u4ee5\u5b9e\u65f6\u8bb0\u5f55\u8fdb\u7a0b\u542f\u52a8\u884c\u4e3a\u3002\u5f53\u68c0\u6d4b\u5230\/tmp\u76ee\u5f55\u4e0b\u7a81\u7136\u51fa\u73b0\u5f02\u5e38\u7684\u53ef\u6267\u884c\u6587\u4ef6\uff08\u5982\u901a\u8fc7curl\u4e0b\u8f7d\u7684\u811a\u672c\uff09\uff0c\u5373\u53ef\u89e6\u53d1\u544a\u8b66\u3002\u8fd9\u79cd\u7ec6\u7c92\u5ea6\u76d1\u63a7\u80fd\u529b\u5bf9\u4e8e\u68c0\u6d4b\u65e0\u6587\u4ef6\u653b\u51fb\u6216\u4f9b\u5e94\u94fe\u6c61\u67d3\u653b\u51fb\u5c24\u4e3a\u6709\u6548\u3002 \u4e8c\u3001eBPF\u7528\u4e8e\u6076\u610f\u8f6f\u4ef6\u68c0\u6d4b\u7684\u56db\u5927\u6838\u5fc3\u573a\u666f 1. \u7cfb\u7edf\u8c03\u7528\u5e8f\u5217\u5206\u6790 \u6076\u610f\u8f6f\u4ef6\u7684\u884c\u4e3a\u6a21\u5f0f\u901a\u5e38\u4f1a\u5728\u7cfb\u7edf\u8c03\u7528\u5c42\u9762\u7559\u4e0b\u75d5\u8ff9\u3002\u4f8b\u5982\uff1a \u52d2\u7d22\u8f6f\u4ef6\u4f1a\u9891\u7e41\u8c03\u7528\u6587\u4ef6\u8bfb\u5199\uff08read\/write\uff09\u548c\u52a0\u5bc6\u76f8\u5173\u51fd\u6570\uff08\u5982libssl\u7684EVP_EncryptUpdate\uff09 \u6316\u77ff\u6728\u9a6c\u4f1a\u901a\u8fc7clone\u6216fork\u521b\u5efa\u5927\u91cf\u5b50\u8fdb\u7a0b\u6d88\u8017CPU\u8d44\u6e90 \u901a\u8fc7eBPF\u7684tracepoint\u6216kprobe\u6302\u94a9\u5173\u952e\u7cfb\u7edf\u8c03\u7528\uff0c\u7ed3\u5408\u89c4\u5219\u5f15\u64ce\uff08\u5982Falco\uff09\u6216\u673a\u5668\u5b66\u4e60\u6a21\u578b\uff0c\u53ef\u6784\u5efa\u884c\u4e3a\u57fa\u7ebf\u6a21\u578b\uff0c\u8bc6\u522b\u504f\u79bb\u6b63\u5e38\u6a21\u5f0f\u7684\u5f02\u5e38\u6d3b\u52a8\u3002 2. \u7f51\u7edc\u6d41\u91cf\u6df1\u5ea6\u89e3\u6790 eBPF\u7684XDP\uff08eXpress Data Path\uff09\u6846\u67b6\u5141\u8bb8\u5728\u7f51\u7edc\u9a71\u52a8\u5c42\u76f4\u63a5\u5904\u7406\u6570\u636e\u5305\u3002\u8fd9\u4e00\u7279\u6027\u53ef\u7528\u4e8e\uff1a \u68c0\u6d4bC2\u670d\u52a1\u5668\u7684DNS\u67e5\u8be2\u6a21\u5f0f\uff08\u5982\u57df\u540d\u7684\u968f\u673a\u5b57\u7b26\u7ec4\u5408\uff09 \u8bc6\u522b\u52a0\u5bc6\u901a\u4fe1\u4e2d\u7684\u534f\u8bae\u6307\u7eb9\uff08\u5982\u6076\u610f\u8f6f\u4ef6\u5e38\u7528\u7684\u975e\u6807\u51c6TLS\u63e1\u624b\uff09 \u62e6\u622a\u4e0e\u5df2\u77e5\u5a01\u80c1\u60c5\u62a5\uff08IoC\uff09\u5339\u914d\u7684IP\/\u57df\u540d\u901a\u4fe1 \u5f00\u6e90\u9879\u76eeCilium\u5df2\u8bc1\u660e\uff0c\u5728eBPF\u52a0\u6301\u4e0b\uff0c\u5fae\u670d\u52a1\u95f4\u7684\u7f51\u7edc\u7b56\u7565\u6267\u884c\u5ef6\u8fdf\u53ef\u964d\u4f4e\u81f3\u5fae\u79d2\u7ea7\uff0c\u4e3a\u5b9e\u65f6\u963b\u65ad\u6076\u610f\u6d41\u91cf\u63d0\u4f9b\u4e86\u53ef\u80fd\u3002 3. \u5185\u5b58\u653b\u51fb\u68c0\u6d4b \u9488\u5bf9\u5806\u55b7\u5c04\uff08Heap Spraying\uff09\u3001ROP\u94fe\u5229\u7528\u7b49\u9ad8\u7ea7\u653b\u51fb\uff0ceBPF\u53ef\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u589e\u5f3a\u9632\u62a4\uff1a \u76d1\u63a7\u654f\u611f\u5185\u5b58\u533a\u57df\uff08\u5982__user\u7a7a\u95f4\uff09\u7684\u975e\u6cd5\u5199\u5165 \u8ddf\u8e2a\u8fdb\u7a0b\u7684mprotect\u8c03\u7528\uff0c\u53d1\u73b0\u7a81\u7136\u5c06\u5185\u5b58\u9875\u6807\u8bb0\u4e3a\u53ef\u6267\u884c\uff08W^X\u7b56\u7565\u7ed5\u8fc7\uff09\u7684\u884c\u4e3a \u7ed3\u5408BTF\uff08BPF Type Format\uff09\u5b9e\u73b0\u7ed3\u6784\u4f53\u5185\u5b58\u5e03\u5c40\u5206\u6790\uff0c\u8bc6\u522b\u5185\u6838\u6f0f\u6d1e\u5229\u7528\u5c1d\u8bd5 4. \u9690\u853d\u4fe1\u9053\u53d1\u73b0 \u9ad8\u7ea7\u6301\u7eed\u6027\u5a01\u80c1\uff08APT\uff09\u5e38\u901a\u8fc7DNS\u96a7\u9053\u6216HTTP\u4f2a\u88c5\u4f20\u8f93\u6570\u636e\u3002\u57fa\u4e8eeBPF\u7684\u6d41\u91cf\u65f6\u5e8f\u5206\u6790\u80fd\u8bc6\u522b\u5f02\u5e38\u6a21\u5f0f\uff1a \u6570\u636e\u5305\u5927\u5c0f\u5448\u73b0\u89c4\u5f8b\u6027\u5206\u5e03\uff08\u5982\u6309\u5b57\u8282\u7f16\u7801\u7684DNS exfiltration\uff09 \u5fc3\u8df3\u5305\u95f4\u9694\u4e0e\u6b63\u5e38\u534f\u8bae\uff08\u5982HTTP\/2\uff09\u660e\u663e\u4e0d\u7b26 \u4e09\u3001\u5b9e\u6218\u6848\u4f8b\uff1a\u7528eBPF\u6355\u6349Mimikatz\u653b\u51fb \u4ee5\u7ecf\u5178\u7684\u51ed\u8bc1\u7a83\u53d6\u5de5\u5177Mimikatz\u4e3a\u4f8b\uff0c\u5176\u6267\u884c\u65f6\u4f1a\u89e6\u53d1\u4ee5\u4e0b\u7279\u5f81\u884c\u4e3a\uff1a \u901a\u8fc7OpenProcess\u8bbf\u95eelsass.exe\u8fdb\u7a0b\u5185\u5b58 \u8c03\u7528ReadProcessMemory\u63d0\u53d6\u654f\u611f\u6570\u636e \u4f7f\u7528CryptProtectMemory\u5c1d\u8bd5\u89e3\u5bc6\u7f13\u5b58 \u901a\u8fc7\u90e8\u7f72eBPF\u7a0b\u5e8f\u76d1\u63a7Windows\u5b50\u7cfb\u7edf\uff08WSL\uff09\u6216Linux\u7cfb\u7edf\u7684\u76f8\u5173API\u8c03\u7528\uff08\u9700\u7ed3\u5408\u5b50\u7cfb\u7edf\u9002\u914d\uff09\uff0c\u53ef\u6784\u9020\u5982\u4e0b\u68c0\u6d4b\u903b\u8f91\uff1a SEC("tracepoint\/syscalls\/sys_enter_ptrace") int trace_ptrace(struct trace_event_raw_sys_enter* ctx) { u64 pid = bpf_get_current_pid_tgid() 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