{"id":1024,"date":"2026-06-27T23:01:23","date_gmt":"2026-06-27T15:01:23","guid":{"rendered":"http:\/\/10.10.10.101\/?p=1024"},"modified":"2026-06-27T23:01:23","modified_gmt":"2026-06-27T15:01:23","slug":"%e8%a7%a3%e5%af%86windows-x64%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8%e9%93%be%ef%bc%9a%e4%bb%8e%e7%94%a8%e6%88%b7%e6%80%81%e5%88%b0ntcreatefile%e5%ae%8c%e6%95%b4%e5%89%96%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.htmacg.cn\/?p=1024","title":{"rendered":"\u89e3\u5bc6Windows x64\u7cfb\u7edf\u8c03\u7528\u94fe\uff1a\u4ece\u7528\u6237\u6001\u5230NtCreateFile\u5b8c\u6574\u5256\u6790"},"content":{"rendered":"<h2>\u4ece\u7528\u6237\u6001\u5230\u5185\u6838\uff1aWindows x64 \u7cfb\u7edf\u8c03\u7528\u94fe\u6df1\u5ea6\u5256\u6790<\/h2>\n<p>\u5728\u4fe1\u606f\u5b89\u5168\u7814\u7a76\u3001\u6f0f\u6d1e\u6316\u6398\u4e0e\u53cd\u7f16\u8bd1\u9886\u57df\uff0c\u7406\u89e3\u64cd\u4f5c\u7cfb\u7edf\u5e95\u5c42\u7684\u7cfb\u7edf\u8c03\u7528\u673a\u5236\u662f\u8fdb\u9636\u7684\u5fc5\u7ecf\u4e4b\u8def\u3002\u7cfb\u7edf\u8c03\u7528\u662f\u7528\u6237\u6001\u5e94\u7528\u7a0b\u5e8f\u4e0e\u5185\u6838\u6001\u670d\u52a1\u4e4b\u95f4\u7684\u552f\u4e00\u5408\u6cd5\u6865\u6881\uff0c\u800c<strong>Windows x64 \u4e0b\u7684\u7cfb\u7edf\u8c03\u7528\u94fe<\/strong>\uff0c\u7531\u4e8e\u5176\u72ec\u7279\u7684\u786c\u4ef6\u4e0e\u8f6f\u4ef6\u4ea4\u4e92\u8bbe\u8ba1\uff0c\u4e00\u76f4\u662f\u9006\u5411\u5de5\u7a0b\u4e0e\u5b89\u5168\u5206\u6790\u4e2d\u7684\u91cd\u70b9\u4e0e\u96be\u70b9\u3002\u672c\u6587\u5c06\u4ee5\u4e13\u4e1a\u4e25\u8c28\u7684\u89c6\u89d2\uff0c\u4ece\u7528\u6237\u6001\u5b58\u6839\u51fd\u6570\u51fa\u53d1\uff0c\u9010\u5c42\u6df1\u5165\u81f3\u5185\u6838\u6001\u5b9e\u73b0\uff0c\u5b8c\u6574\u89e3\u6790<strong>NtCreateFile<\/strong>\u8fd9\u4e00\u6838\u5fc3API\u7684\u8c03\u7528\u5168\u94fe\u8def\uff0c\u63ed\u793a\u5176\u80cc\u540e\u7684\u5bc4\u5b58\u5668\u64cd\u4f5c\u3001\u4e2d\u65ad\u5207\u6362\u3001\u670d\u52a1\u8868\u5206\u53d1\u7b49\u5173\u952e\u6280\u672f\u7ec6\u8282\u3002<\/p>\n<h3>\u4e00\u3001\u6574\u4f53\u8c03\u7528\u94fe\u6982\u89c8\uff1a\u4eceApp\u5230\u5185\u6838\u7684\u5b8c\u6574\u8def\u5f84<\/h3>\n<p>\u5f53\u7528\u6237\u6001\u7684\u5e94\u7528\u7a0b\u5e8f\uff08\u5982\u4e00\u4e2a\u8bfb\u53d6\u6587\u4ef6\u7684\u8fdb\u7a0b\uff09\u8c03\u7528<strong>CreateFileW<\/strong>\u7b49API\u65f6\uff0c\u5176\u5e95\u5c42\u4f1a\u7ecf\u8fc7\u5c42\u5c42\u5c01\u88c5\uff0c\u6700\u7ec8\u89e6\u53d1\u4e00\u6b21\u5b8c\u6574\u7684\u7cfb\u7edf\u8c03\u7528\u3002\u4ee5<strong>NtCreateFile<\/strong>\u4e3a\u4f8b\uff0c\u5176\u6838\u5fc3\u8def\u5f84\u5982\u4e0b\uff1a<\/p>\n<blockquote><p>\n<strong>\u7528\u6237\u6001 App<\/strong><br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2193<br \/>\n<strong>NtCreateFile (ntdll.dll)<\/strong> \u2190 \u7528\u6237\u6001\u5b58\u6839\u51fd\u6570<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MOV EAX, syscall_number<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SYSCALL<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2193<br \/>\n\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 Ring3 \u2192 Ring0 \u5207\u6362 \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2193<br \/>\n<strong>KiSystemCall64 (ntoskrnl.exe)<\/strong> \u2190 \u5185\u6838\u6001\u7cfb\u7edf\u8c03\u7528\u5165\u53e3<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2193<br \/>\n<strong>KiSystemServiceRepeat<\/strong> \u2190 \u67e5 SSDT \/ KiServiceTable<br \/>\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\u2193<br \/>\n<strong>nt!NtCreateFile (ntoskrnl.exe)<\/strong> \u2190 \u771f\u6b63\u7684\u5185\u6838\u5b9e\u73b0\n<\/p><\/blockquote>\n<p>\u8fd9\u4e00\u8def\u5f84\u867d\u7136\u770b\u4f3c\u7b80\u5355\uff0c\u4f46\u5176\u4e2d\u5305\u542b\u4e86\u786c\u4ef6\u7279\u6743\u7ea7\u5207\u6362\u3001\u5bc4\u5b58\u5668\u72b6\u6001\u4fdd\u5b58\u3001\u6808\u5207\u6362\u3001\u7cfb\u7edf\u670d\u52a1\u8868\u67e5\u627e\u3001\u53c2\u6570\u590d\u5236\u7b49\u590d\u6742\u6b65\u9aa4\u3002\u5bf9\u4e8e\u6f0f\u6d1e\u6316\u6398\u800c\u8a00\uff0c\u4efb\u4f55\u4e00\u6b65\u7684\u758f\u5ffd\u90fd\u53ef\u80fd\u6210\u4e3a\u7a81\u7834\u53e3\u3002<\/p>\n<h3>\u4e8c\u3001\u7528\u6237\u6001\uff1antdll!NtCreateFile \u5b58\u6839\u51fd\u6570<\/h3>\n<p>\u5728Windows x64\u73af\u5883\u4e0b\uff0c\u7cfb\u7edf\u8c03\u7528\u7684\u7528\u6237\u6001\u5165\u53e3\u5747\u4f4d\u4e8e<strong>ntdll.dll<\/strong>\u4e2d\u3002\u8fd9\u4e9b\u51fd\u6570\u5e76\u975e\u771f\u6b63\u7684\u5185\u6838\u5b9e\u73b0\uff0c\u800c\u662f\u7cbe\u5fc3\u8bbe\u8ba1\u7684<strong>\u5b58\u6839\u51fd\u6570\uff08stub\uff09<\/strong>\u3002\u53cd\u7f16\u8bd1<strong>ntdll!NtCreateFile<\/strong>\u53ef\u4ee5\u53d1\u73b0\u5176\u6838\u5fc3\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n<pre><code>ntdll!NtCreateFile:\n    mov r10, rcx          ; SYSCALL \u4f1a\u7528 rcx \u4fdd\u5b58\u8fd4\u56de\u5730\u5740\uff0c\u5148\u642c\u8d70\u7b2c\u4e00\u4e2a\u53c2\u6570\n    mov eax, 0x55         ; \u7cfb\u7edf\u8c03\u7528\u53f7\uff08\u4e0d\u540c Windows \u7248\u672c\u4e0d\u540c\uff09\n    test byte ptr [SharedUserData+0x308], 1\n    jne use_int2e         ; \u6781\u5c11\u8d70\u8fd9\u6761\u8def\u5f84\n    syscall               ; \u89e6\u53d1\u7cfb\u7edf\u8c03\u7528\n    ret<\/code><\/pre>\n<p>\u5173\u952e\u70b9\u6709\u4ee5\u4e0b\u51e0\u4e2a\u7ef4\u5ea6\uff1a<\/p>\n<ul>\n<li><strong>\u7cfb\u7edf\u8c03\u7528\u53f7\uff08Syscall Number\uff09<\/strong>\uff1a\u5b58\u50a8\u5728EAX\u5bc4\u5b58\u5668\u4e2d\uff0c\u4f5c\u4e3a\u540e\u7eed\u5185\u6838\u5728SSDT\uff08System Service Descriptor Table\uff09\u4e2d\u7d22\u5f15\u7684\u952e\u503c\u3002\u8be5\u7f16\u53f7\u56e0Windows\u7248\u672c\u800c\u5f02\uff08\u59820x55\u4ec5\u7528\u4e8e\u6f14\u793a\uff09\uff0c\u662f\u6f0f\u6d1e\u6316\u6398\u4e2d\u9700\u8981\u52a8\u6001\u83b7\u53d6\u7684\u91cd\u8981\u53c2\u6570\u3002<\/li>\n<li><strong>\u53c2\u6570\u4fdd\u5b58\u7b56\u7565<\/strong>\uff1ax64\u8c03\u7528\u7ea6\u5b9a\u4e2d\u524d\u56db\u4e2a\u53c2\u6570\u901a\u8fc7RCX\u3001RDX\u3001R8\u3001R9\u4f20\u9012\u3002\u7531\u4e8e<code>SYSCALL<\/code>\u6307\u4ee4\u4f1a\u8986\u76d6RCX\uff08\u4fdd\u5b58\u8fd4\u56de\u5730\u5740\uff09\u4e0eR11\uff08\u4fdd\u5b58RFLAGS\uff09\uff0c\u56e0\u6b64\u9700\u8981\u5148\u5c06\u53c2\u6570\u4eceRCX\u79fb\u81f3R10\uff0c\u518d\u7531\u5185\u6838\u8d1f\u8d23\u4eceR10\u3001RDX\u3001R8\u3001R9\u4e2d\u63d0\u53d6\u53c2\u6570\u3002<\/li>\n<li><strong>\u517c\u5bb9\u6027\u68c0\u67e5<\/strong>\uff1a\u4ee3\u7801\u4e2d\u7f55\u89c1\u5730\u4fdd\u7559\u4e86<code>use_int2e<\/code>\u5206\u652f\uff0c\u8fd9\u662f\u4e3a\u4e86\u517c\u5bb9\u90e8\u5206\u8001\u65e7\u786c\u4ef6\u6216\u7279\u6b8a\u8c03\u8bd5\u73af\u5883\u3002\u5728\u7edd\u5927\u591a\u6570\u73b0\u4ee3\u7cfb\u7edf\u4e2d\uff0c<code>SYSCALL<\/code>\u6307\u4ee4\u662f\u552f\u4e00\u9014\u5f84\u3002<\/li>\n<\/ul>\n<p>\u4ece\u5b89\u5168\u7814\u7a76\u89d2\u5ea6\u770b\uff0cntdll\u4e2d\u7684\u5b58\u6839\u51fd\u6570\u662f<strong>\u94a9\u5b50\uff08Hook\uff09\u6280\u672f\u7684\u6700\u4f73\u76ee\u6807<\/strong>\u3002\u901a\u8fc7\u4fee\u6539\u8fd9\u4e9b\u51fd\u6570\u5165\u53e3\uff08\u5982\u66ff\u6362\u4e3aJMP\u6307\u4ee4\uff09\uff0c\u53ef\u4ee5\u62e6\u622a\u6240\u6709\u7cfb\u7edf\u8c03\u7528\uff0c\u5b9e\u73b0Rootkit\u3001\u8c03\u8bd5\u5668\u6216\u6c99\u7bb1\u7684\u68c0\u6d4b\u903b\u8f91\u3002\u53cd\u7f16\u8bd1\u65f6\uff0c\u6211\u4eec\u5e38\u5e38\u9700\u8981\u5173\u6ce8\u8fd9\u4e9b\u5b58\u6839\u51fd\u6570\u662f\u5426\u88ab\u7be1\u6539\u3002<\/p>\n<h3>\u4e09\u3001SYSCALL \u6307\u4ee4\u4e0e MSR_LSTAR\uff1a\u786c\u4ef6\u7ea7\u7684\u9677\u9631<\/h3>\n<p>\u5f53CPU\u6267\u884c<code>SYSCALL<\/code>\u6307\u4ee4\u65f6\uff0c\u5e76\u975e\u7b80\u5355\u5730\u8df3\u8f6c\u5230\u4efb\u610f\u5730\u5740\uff0c\u800c\u662f\u901a\u8fc7\u4e00\u7cfb\u5217<strong>\u6a21\u578b\u7279\u5b9a\u5bc4\u5b58\u5668\uff08MSR\uff09<\/strong>\u6765\u5b8c\u6210\u4ece\u7528\u6237\u6001\u5230\u5185\u6838\u6001\u7684\u786c\u4ef6\u7ea7\u5207\u6362\u3002\u5176\u4e2d\u4e09\u4e2a\u6838\u5fc3MSR\u5bc4\u5b58\u5668\u5206\u522b\u4e3a\uff1a<\/p>\n<blockquote>\n<table>\n<tbody>\n<tr>\n<th>MSR\u5bc4\u5b58\u5668<\/th>\n<th>\u5730\u5740<\/th>\n<th>\u4f5c\u7528<\/th>\n<\/tr>\n<tr>\n<td>MSR_LSTAR<\/td>\n<td>0xC0000082<\/td>\n<td>\u5b58\u50a8SYSCALL\u7684Ring0\u5165\u53e3\u70b9\uff08RIP\u76ee\u6807\uff09<\/td>\n<\/tr>\n<tr>\n<td>MSR_STAR<\/td>\n<td>0xC0000081<\/td>\n<td>\u5b58\u50a8CS\/SS\u9009\u62e9\u5b50\uff08\u9ad832\u4f4d=\u7528\u6237\u6001\uff0c\u4f4e32\u4f4d=\u5185\u6838\u6001\uff09<\/td>\n<\/tr>\n<tr>\n<td>MSR_SFMASK<\/td>\n<td>0xC0000084<\/td>\n<td>SYSCALL\u65f6\u5bf9RFLAGS\u7684\u63a9\u7801\uff08\u5982\u5173\u95ed\u4e2d\u65ad\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/blockquote>\n<p>CPU\u5728\u6267\u884c<code>SYSCALL<\/code>\u65f6\uff0c\u786c\u4ef6\u81ea\u52a8\u5b8c\u6210\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>RCX \u2190 RIP\uff08\u4fdd\u5b58\u7528\u6237\u6001\u8fd4\u56de\u5730\u5740\uff09<\/li>\n<li>R11 \u2190 RFLAGS\uff08\u4fdd\u5b58\u7528\u6237\u6001\u6807\u5fd7\uff09<\/li>\n<li>RFLAGS &amp;= ~MSR_SFMASK\uff08\u901a\u5e38\u5173\u95edIF\uff0c\u5373\u5173\u4e2d\u65ad\uff0c\u9632\u6b62\u5d4c\u5957\u8c03\u7528\uff09<\/li>\n<li>CS \u2190 MSR_STAR[47:32]\uff08\u5185\u6838\u4ee3\u7801\u6bb5\u9009\u62e9\u5b50\uff09<\/li>\n<li>SS \u2190 MSR_STAR[47:32] + 8\uff08\u5185\u6838\u6808\u6bb5\u9009\u62e9\u5b50\uff09<\/li>\n<li>RIP \u2190 MSR_LSTAR\uff08\u8df3\u8f6c\u5230\u5185\u6838\u5165\u53e3KiSystemCall64\uff09<\/li>\n<\/ol>\n<p><strong>\u4e00\u6761\u975e\u5e38\u91cd\u8981\u7684\u5b89\u5168\u7279\u6027<\/strong>\uff1a<code>SYSCALL<\/code>\u6307\u4ee4\u5728x64\u67b6\u6784\u4e0b\u4e0d\u81ea\u52a8\u5207\u6362RSP\uff08\u6808\u6307\u9488\uff09\u3002\u8fd9\u610f\u5473\u7740\u7528\u6237\u6001RSP\u4f1a\u4fdd\u7559\u81f3\u5185\u6838\u6001\uff0c\u5185\u6838\u5fc5\u987b\u5728\u5165\u53e3\u5904\u7acb\u5373\u901a\u8fc7<code>swapgs<\/code>\u6307\u4ee4\u52a0\u8f7d\u5185\u6838\u6808\u5730\u5740\uff0c\u5426\u5219\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u7cbe\u5fc3\u6784\u9020\u7684RSP\u503c\u5bfc\u81f4\u5185\u6838\u5d29\u6e83\u6216\u8d8a\u6743\u8bbf\u95ee\u3002\u8fd9\u4e00\u8bbe\u8ba1\u7f3a\u9677\u5728\u5386\u53f2\u4e0a\u66fe\u591a\u6b21\u88ab\u5229\u7528\uff0c\u662f\u6f0f\u6d1e\u6316\u6398\u7684\u70ed\u70b9\u533a\u57df\u3002<\/p>\n<p>\u5185\u6838\u521d\u59cb\u5316\u65f6\uff0c\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u8bbe\u7f6eMSR_LSTAR\uff1a<\/p>\n<pre><code>\/\/ \u5728 KiInitializeBootStructures \u4e2d\nwrmsr(MSR_LSTAR, (ULONG64)KiSystemCall64);<\/code><\/pre>\n<p>\u5bf9\u4e8e\u53cd\u7f16\u8bd1\u7814\u7a76\u4eba\u5458\u800c\u8a00\uff0c\u76f4\u63a5\u8bfb\u53d6MSR\u5bc4\u5b58\u5668\u6216\u5206\u6790<code>wrmsr<\/code>\u6307\u4ee4\u9644\u8fd1\u7684\u521d\u59cb\u5316\u4ee3\u7801\uff0c\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u7cfb\u7edf\u8c03\u7528\u5165\u53e3\u51fd\u6570\u7684\u5730\u5740\u3002<\/p>\n<h3>\u56db\u3001KiSystemCall64\uff1a\u5185\u6838\u5165\u53e3\u4e0e\u4e0a\u4e0b\u6587\u4fdd\u5b58<\/h3>\n<p><strong>KiSystemCall64<\/strong>\u662f\u5185\u6838\u4e2d\u8d1f\u8d23\u63a5\u6536\u6240\u6709\u7cfb\u7edf\u8c03\u7528\u7684\u6838\u5fc3\u51fd\u6570\u3002\u5176\u6c47\u7f16\u5b9e\u73b0\u5305\u542b\u4e86\u6781\u4e3a\u7cbe\u5bc6\u7684\u4e0a\u4e0b\u6587\u4fdd\u5b58\u4e0e\u6808\u5207\u6362\u903b\u8f91\uff1a<\/p>\n<pre><code>nt!KiSystemCall64:\n    swapgs                    ; GS \u5207\u6362\u5230\u5185\u6838 PCR\uff08KPCR\uff09\n    mov gs:[UserRsp], rsp    ; \u4fdd\u5b58\u7528\u6237\u6001 RSP\n    mov rsp, gs:[KernelStack]; \u5207\u6362\u5230\u5185\u6838\u6808\n\n    ; \u6784\u9020 KTRAP_FRAME\n    push UmSS                ; \u7528\u6237\u6001 SS\n    push gs:[UserRsp]        ; \u7528\u6237\u6001 RSP\n    push r11                 ; \u7528\u6237\u6001 RFLAGS\n    push UmCS                ; \u7528\u6237\u6001 CS\n    push rcx                 ; \u7528\u6237\u6001 RIP\uff08\u8fd4\u56de\u5730\u5740\uff09\n    ; ... \u4fdd\u5b58\u5176\u4f59\u5bc4\u5b58\u5668 ...\n    sti                      ; \u91cd\u65b0\u5f00\u4e2d\u65ad\n\n    ; \u2500\u2500 \u8fdb\u5165\u5206\u53d1\u903b\u8f91 \u2500\u2500\n    ; \u843d\u5165 KiSystemServiceRepeat<\/code><\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u7684\u64cd\u4f5c\u987a\u5e8f\u6781\u5176\u91cd\u8981\uff1a<\/p>\n<ul>\n<li><strong><code>swapgs<\/code><\/strong>\uff1a\u4ea4\u6362GS\u57fa\u5740\u5bc4\u5b58\u5668\uff0c\u4f7f\u5176\u6307\u5411\u5185\u6838\u7684\u5904\u7406\u5668\u63a7\u5236\u533a\uff08KPCR\uff09\u3002\u540e\u7eed\u6240\u6709<code>gs:[...]<\/code>\u7684\u8bbf\u95ee\u90fd\u53d8\u6210\u5bf9\u5185\u6838\u6570\u636e\u7ed3\u6784\u7684\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u6808\u5207\u6362<\/strong>\uff1a\u4ece<code>UserRsp<\/code>\u5b57\u6bb5\u8bfb\u53d6\u4e4b\u524d\u4fdd\u5b58\u7684\u7528\u6237\u6808\uff0c\u540c\u65f6\u5c06RSP\u8bbe\u7f6e\u4e3a\u5185\u6838\u6808\u3002\u8fd9\u4e00\u64cd\u4f5c\u9632\u6b62\u4e86\u653b\u51fb\u8005\u901a\u8fc7\u63a7\u5236RSP\u6765\u52ab\u6301\u5185\u6838\u6267\u884c\u6d41\u3002<\/li>\n<li><strong>\u6784\u5efa\u9677\u9631\u5e27\uff08Trap Frame\uff09<\/strong>\uff1a\u4ee5\u7279\u5b9a\u7684\u987a\u5e8f\u538b\u6808\u7528\u6237\u6001SS\u3001RSP\u3001RFLAGS\u3001CS\u3001RIP\uff0c\u5f62\u6210\u4e00\u4e2a\u6807\u51c6\u7684<code>KTRAP_FRAME<\/code>\u3002\u8fd9\u4e0d\u4ec5\u662f\u529f\u80fd\u9700\u6c42\uff0c\u66f4\u662f\u540e\u7eed\u5f02\u5e38\u5904\u7406\u4e0e\u8c03\u8bd5\u7684\u57fa\u7840\u7ed3\u6784\u3002<\/li>\n<li><strong>\u91cd\u65b0\u5f00\u4e2d\u65ad<\/strong>\uff1a\u4f7f\u7528<code>sti<\/code>\u6307\u4ee4\u6062\u590d\u4e2d\u65ad\uff0c\u5141\u8bb8\u9ad8\u4f18\u5148\u7ea7\u4e2d\u65ad\u5728\u7cfb\u7edf\u8c03\u7528\u5904\u7406\u671f\u95f4\u88ab\u54cd\u5e94\uff0c\u907f\u514d\u7cfb\u7edf\u54cd\u5e94\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<p>\u5728\u6f0f\u6d1e\u6316\u6398\u4e2d\uff0c<strong>KTRAP_FRAME<\/strong>\u7684\u7ed3\u6784\u5b8c\u6574\u6027\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u653b\u51fb\u8005\u80fd\u591f\u5728\u8fdb\u5165\u5185\u6838\u540e\u3001\u6784\u5efa\u9677\u9631\u5e27\u4e4b\u524d\uff0c\u901a\u8fc7\u7ade\u6001\u6761\u4ef6\u6216\u5185\u5b58\u635f\u574f\u4fee\u6539GS\u76f8\u5173\u5b57\u6bb5\uff0c\u53ef\u80fd\u5bfc\u81f4\u7528\u6237\u6001\u4e0a\u4e0b\u6587\u88ab\u52ab\u6301\uff0c\u8fdb\u800c\u5b9e\u73b0\u6743\u9650\u63d0\u5347\u3002<\/p>\n<h3>\u4e94\u3001SSDT \u4e0e KiServiceTable\uff1a\u7cfb\u7edf\u670d\u52a1\u8868\u89e3\u7801<\/h3>\n<p>\u5f53\u4fdd\u5b58\u597d\u4e0a\u4e0b\u6587\u540e\uff0c\u6267\u884c\u6d41\u8fdb\u5165<strong>KiSystemServiceRepeat<\/strong>\uff0c\u5f00\u59cb\u6839\u636e\u7cfb\u7edf\u8c03\u7528\u53f7\uff08EAX\uff09\u67e5\u627e\u5bf9\u5e94\u7684\u5185\u6838\u51fd\u6570\u3002\u6838\u5fc3\u6570\u636e\u7ed3\u6784\u662f<strong>SSDT\uff08System Service Descriptor Table\uff09<\/strong>\u3002\u5176\u5b9a\u4e49\u4e3a\uff1a<\/p>\n<pre><code>typedef struct _KSERVICE_TABLE_DESCRIPTOR {\n    PLONG Base;        \/\/ KiServiceTable \u2014 \u51fd\u6570\u504f\u79fb\u6570\u7ec4\n    PULONG Count;      \/\/ \u8c03\u7528\u8ba1\u6570\uff08\u8c03\u8bd5\u7528\uff0c\u53ef\u80fd\u4e3aNULL\uff09\n    ULONG Limit;       \/\/ \u8868\u4e2d\u6700\u5927\u670d\u52a1\u53f7\n    PUCHAR Number;     \/\/ \u53c2\u6570\u5b57\u8282\u6570\u8868\uff08KiArgumentTable\uff09\n} KSERVICE_TABLE_DESCRIPTOR;<\/code><\/pre>\n<p>Windows x64\u7cfb\u7edf\u4e2d\u5b58\u5728\u4e24\u5f20\u4e3b\u8868\uff1a<\/p>\n<ul>\n<li><strong>KeServiceDescriptorTable[0]<\/strong>\uff1ant\u7cfb\u7edf\u8c03\u7528\u8868\uff08KiServiceTable\uff09\uff0c\u7ba1\u7406\u5927\u591a\u6570\u5185\u6838API\uff0c\u5982NtCreateFile\u3002<\/li>\n<li><strong>KeServiceDescriptorTableShadow[1]<\/strong>\uff1a\u5305\u542bwin32k\u7684\u6269\u5c55\u8868\uff08W32pServiceTable\uff09\uff0c\u7ba1\u7406GUI\u76f8\u5173\u8c03\u7528\uff0c\u5e38\u88ab\u6f0f\u6d1e\u5229\u7528\u9488\u5bf9\uff08\u5982CVE\u4e2d\u7684\u5b57\u4f53\u89e3\u6790\u6f0f\u6d1e\uff09\u3002<\/li>\n<\/ul>\n<p>\u4e3a\u4e86\u8282\u7701\u7a7a\u95f4\u5e76\u4f18\u5316\u6027\u80fd\uff0cx64 Windows\u6ca1\u6709\u76f4\u63a5\u5b58\u50a8\u51fd\u6570\u6307\u9488\uff0c\u800c\u662f\u91c7\u7528<strong>\u76f8\u5bf9\u504f\u79fb\u7f16\u7801<\/strong>\uff1a<\/p>\n<pre><code>\/\/ KiServiceTable[i] \u7684\u7f16\u7801\uff1a\n\/\/ \u9ad828\u4f4d = \u51fd\u6570\u76f8\u5bf9\u4e8e KiServiceTable \u57fa\u5740\u7684\u5b57\u8282\u504f\u79fb\uff08\u5e26\u7b26\u53f7\u53f3\u79fb4\u4f4d\uff09\n\/\/ \u4f4e 4\u4f4d = \u8be5\u7cfb\u7edf\u8c03\u7528\u5728\u6808\u4e0a\u7684\u989d\u5916\u53c2\u6570\u4e2a\u6570\noffset = (INT32)KiServiceTable[syscall_number] &gt;&gt; 4;\ntarget_function = (ULONG_PTR)KiServiceTable + offset;\nstack_params = KiServiceTable[syscall_number] &amp; 0xF;<\/code><\/pre>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u7684\u5de7\u5999\u4e4b\u5904\u5728\u4e8e\uff1a<strong>\u4e00\u6b21\u67e5\u8868\u5373\u53ef\u83b7\u5f97\u76ee\u6807\u51fd\u6570\u5730\u5740\u4e0e\u6240\u9700\u989d\u5916\u53c2\u6570\u6570\u91cf<\/strong>\u3002\u4f4e4\u4f4d\u8bb0\u5f55\u4e86\u8d85\u8fc74\u4e2a\u53c2\u6570\u7684\u5806\u6808\u590d\u5236\u6570\u91cf\uff0c\u5185\u6838\u53ef\u4ee5\u6839\u636e\u6b64\u503c\u51b3\u5b9a\u9700\u8981\u4ece\u7528\u6237\u6808\u590d\u5236\u591a\u5c11\u5b57\u8282\u5230\u5185\u6838\u6808\uff0c\u9632\u6b62\u5806\u6808\u6ea2\u51fa\u6216\u4fe1\u606f\u6cc4\u9732\u3002<\/p>\n<p>\u5206\u53d1\u903b\u8f91\u7684\u6838\u5fc3\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code>KiSystemServiceRepeat:\n    ; EAX = \u7cfb\u7edf\u8c03\u7528\u53f7\n    ; \u4f4d[12] \u533a\u5206\u662f nt \u8868(0) \u8fd8\u662f win32k \u8868(1)\n    mov edi, eax\n    shr edi, 7\n    and edi, 0x20          ; 0 \u6216 0x20\uff08\u9009 nt \u8868\u6216 shadow \u8868\uff09\n    and eax, 0xFFF        ; \u4f4e12\u4f4d = \u8868\u5185\u7d22\u5f15\n\n    ; \u8fb9\u754c\u68c0\u67e5\n    lea r10, [KeServiceDescriptorTable + rdi]\n    cmp eax, [r10+LIMIT_OFFSET]\n    jae invalid_syscall\n\n    ; \u67e5 KiServiceTable\n    lea r11, [r10+BASE_OFFSET]\n    movsxd r11, dword ptr [r11 + rax*4]\n    mov ecx, r11\n    shr ecx, (not implemented)     ; \u53d6\u53c2\u6570\u4fe1\u606f\n    sar r11, 4                      ; \u5f97\u5230\u771f\u5b9e\u504f\u79fb\n    add r11, [r10+BASE_OFFSET]     ; \u5f97\u5230\u51fd\u6570\u5730\u5740\n    ; ... \u590d\u5236\u989d\u5916\u53c2\u6570 ...\n    call r11                        ; \u8c03\u7528 nt!NtCreateFile<\/code><\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c<strong>\u8fb9\u754c\u68c0\u67e5<\/strong>\uff08<code>cmp eax, [r10+LIMIT_OFFSET]<\/code>\uff09\u662f\u5b89\u5168\u5173\u952e\u70b9\u3002\u5982\u679c\u653b\u51fb\u8005\u80fd\u591f\u63d0\u4f9b\u5927\u4e8e\u8868\u8303\u56f4\u7684\u7cfb\u7edf\u8c03\u7528\u53f7\uff08\u5982\u901a\u8fc7\u81ea\u5b9a\u4e49GDI\u5bf9\u8c61\uff09\uff0c\u53ef\u80fd\u7ed5\u8fc7\u68c0\u67e5\u8fdb\u5165<code>invalid_syscall<\/code>\u5206\u652f\uff0c\u4f46\u82e5\u68c0\u67e5\u4ee3\u7801\u672c\u8eab\u5b58\u5728\u6574\u6570\u6ea2\u51fa\u6216\u903b\u8f91\u9519\u8bef\uff0c\u5219\u53ef\u80fd\u5bfc\u81f4\u8d8a\u754c\u8bbf\u95ee\uff0c\u9020\u6210\u4efb\u610f\u4ee3\u7801\u6267\u884c\u3002<\/p>\n<h3>\u516d\u3001nt!NtCreateFile \u6267\u884c\u4e0e\u8fd4\u56de\u8def\u5f84<\/h3>\n<p>\u7ecf\u8fc7\u670d\u52a1\u8868\u67e5\u627e\u540e\uff0c\u6700\u7ec8\u6267\u884c\u76ee\u6807\u51fd\u6570<strong>nt!NtCreateFile<\/strong>\u3002\u5176\u539f\u578b\u4e3a\uff1a<\/p>\n<pre><code>NTSTATUS NtCreateFile(\n    PHANDLE FileHandle,          \/\/ rcx (\u5b9e\u9645\u5df2\u5728r10)\n    ACCESS_MASK DesiredAccess,    \/\/ rdx\n    POBJECT_ATTRIBUTES ObjectAttributes, \/\/ r8\n    PIO_STATUS_BLOCK IoStatusBlock, \/\/ r9\n    PLARGE_INTEGER AllocationSize, \/\/ \u6808\u53c2\u6570[0]\n    ULONG FileAttributes,         \/\/ \u6808\u53c2\u6570[1]\n    ULONG ShareAccess,            \/\/ \u6808\u53c2\u6570[2]\n    ULONG CreateDisposition,      \/\/ \u6808\u53c2\u6570[3]\n    ULONG CreateOptions,          \/\/ \u6808\u53c2\u6570[4]\n    PVOID EaBuffer,              \/\/ \u6808\u53c2\u6570[5]\n    ULONG EaLength                \/\/ \u6808\u53c2\u6570[6]\n);<\/code><\/pre>\n<p>\u6b64\u51fd\u6570\u4f1a\u4f9d\u6b21\u8c03\u7528<code>IoCreateFile<\/code>\u3001<code>IopCreateFile<\/code>\uff0c\u6700\u7ec8\u901a\u8fc7\u5bf9\u8c61\u7ba1\u7406\u5668\u4e0e\u6587\u4ef6\u7cfb\u7edf\u9a71\u52a8\u4ea4\u4e92\u3002\u5bf9\u4e8e\u6f0f\u6d1e\u7814\u7a76\u800c\u8a00\uff0c<strong>\u53c2\u6570\u9a8c\u8bc1<\/strong>\uff08\u5982<code>ObjectAttributes<\/code>\u662f\u5426\u53ef\u7a7a\u3001<code>DesiredAccess<\/code>\u662f\u5426\u8d85\u9650\uff09\u662f\u8fd9\u4e2a\u9636\u6bb5\u7684\u91cd\u70b9\u3002\u5386\u53f2\u4e0a\uff0c\u591a\u4e2a\u672c\u5730\u63d0\u6743\u6f0f\u6d1e\u6b63\u662f\u901a\u8fc7\u4f20\u9012\u7578\u5f62\u53c2\u6570\u7ed5\u8fc7\u9a8c\u8bc1\u5b9e\u73b0\u7684\u3002<\/p>\n<p>\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u540e\uff0c\u4f1a\u901a\u8fc7\u5982\u4e0b\u8def\u5f84\u8fd4\u56de\u7528\u6237\u6001\uff1a<\/p>\n<pre><code>    mov rcx, [TrapFrame.Rip]   ; \u7528\u6237\u6001\u8fd4\u56de\u5730\u5740 \u2192 RCX\n    mov r11, [TrapFrame.EFlags]; \u7528\u6237\u6001 RFLAGS \u2192 R11\n    mov rsp, [TrapFrame.Rsp]   ; \u6062\u590d\u7528\u6237\u6001 RSP\n    swapgs                     ; GS \u5207\u56de\u7528\u6237\u6001 TEB\n    sysretq                    ; \u8fd4\u56de Ring3\n    ; CPU: RIP\u2190RCX, RFLAGS\u2190R11, CS\u2190STAR[63:48]+16, SS\u2190STAR[63:48]+8<\/code><\/pre>\n<p><code>sysretq<\/code>\u6307\u4ee4\u4e0e<code>sycall<\/code>\u76f8\u53cd\uff1a\u5b83\u4eceRCX\u6062\u590dRIP\u3001\u4eceR11\u6062\u590dRFLAGS\uff0c\u5e76\u6839\u636eMSR_STAR\u7684\u914d\u7f6e\u8bbe\u7f6eCS\/SS\u9009\u62e9\u5b50\uff0c\u5b8c\u6210\u4eceRing0\u5230Ring3\u7684\u5207\u6362\u3002<\/p>\n<h3>\u4e03\u3001\u603b\u7ed3\uff1a\u7cfb\u7edf\u8c03\u7528\u94fe\u7684\u5b89\u5168\u542f\u793a<\/h3>\n<p>\u901a\u8fc7\u672c\u6587\u7684\u9010\u5c42\u62c6\u89e3\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff1a<strong>\u4e00\u6b21\u770b\u4f3c\u7b80\u5355\u7684\u6587\u4ef6\u6253\u5f00\u64cd\u4f5c\uff0c\u80cc\u540e\u5305\u542b\u4e86\u786c\u4ef6\u3001\u64cd\u4f5c\u7cfb\u7edf\u4e0e\u5b89\u5168\u7b56\u7565\u7684\u7cbe\u5bc6\u534f\u4f5c<\/strong>\u3002\u4eceMSR\u5bc4\u5b58\u5668\u7684\u8bbe\u7f6e\uff0c\u5230\u5185\u6838\u6808\u7684\u5207\u6362\uff0c\u4ece\u670d\u52a1\u8868\u7684\u7f16\u7801\u89e3\u7801\uff0c\u5230\u53c2\u6570\u590d\u5236\u4e0e\u8fd4\u56de\u8def\u5f84\uff0c\u6bcf\u4e00\u4e2a\u73af\u8282\u90fd\u53ef\u80fd\u662f\u5b89\u5168\u6f0f\u6d1e\u7684\u6e29\u5e8a\u3002<\/p>\n<p>\u5bf9\u4e8e\u4fe1\u606f\u5b89\u5168\u7814\u7a76\u4eba\u5458\u800c\u8a00\uff0c\u638c\u63e1\u8fd9\u6761\u8c03\u7528\u94fe\u7684\u4ef7\u503c\u4f53\u73b0\u5728\uff1a<\/p>\n<ul>\n<li><strong>\u6f0f\u6d1e\u6316\u6398<\/strong>\uff1a\u5728<code>KiSystemCall64<\/code>\u4e2d\u7684\u6808\u5207\u6362\u903b\u8f91\u3001<code>KiServiceTable<\/code>\u7684\u7d22\u5f15\u8ba1\u7b97\u3001<code>NtCreateFile<\/code>\u7684\u53c2\u6570\u9a8c\u8bc1\u5904\uff0c\u90fd\u53ef\u80fd\u5b58\u5728\u5185\u5b58\u635f\u574f\u3001\u6574\u6570\u6ea2\u51fa\u3001\u903b\u8f91\u7ed5\u8fc7\u7b49\u6f0f\u6d1e\u3002<\/li>\n<li><strong>\u53cd\u7f16\u8bd1\u5206\u6790<\/strong>\uff1a\u7406\u89e3<code>KTRAP_FRAME<\/code>\u7684\u7ed3\u6784\u4e0e\u5b58\u50a8\u4f4d\u7f6e\uff0c\u80fd\u5728\u9006\u5411\u95ed\u6e90\u9a71\u52a8\u6216Rootkit\u65f6\uff0c\u5feb\u901f\u5b9a\u4f4d\u5176\u94a9\u5b50\u4f4d\u7f6e\u3002<\/li>\n<li><strong>\u9632\u5fa1\u7b56\u7565<\/strong>\uff1a\u5b89\u5168\u4ea7\u54c1\u53ef\u4ee5\u901a\u8fc7\u76d1\u63a7MSR_LSTAR\u7684\u7be1\u6539\u3001SSDT\u7684\u5f02\u5e38\u4fee\u6539\u3001\u6216<code>swapgs<\/code>\u7684\u6ee5\u7528\u7b49\u884c\u4e3a\uff0c\u8bc6\u522b\u6f5c\u5728\u7684\u5185\u6838\u7ea7<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4ece\u7528\u6237\u6001\u5230\u5185\u6838\uff1aWindows 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