{"id":203,"date":"2026-04-24T18:42:10","date_gmt":"2026-04-24T10:42:10","guid":{"rendered":"https:\/\/www.sherlock666.cn\/?p=203"},"modified":"2026-04-24T18:56:34","modified_gmt":"2026-04-24T10:56:34","slug":"%e7%ac%ac%e4%ba%94%e8%8a%82%e8%af%be%e8%8a%b1%e6%8c%87%e4%bb%a4%e7%ad%89%e6%b7%b7%e6%b7%86%e6%8a%80%e6%9c%af","status":"publish","type":"post","link":"https:\/\/www.sherlock666.cn\/index.php\/2026\/04\/24\/%e7%ac%ac%e4%ba%94%e8%8a%82%e8%af%be%e8%8a%b1%e6%8c%87%e4%bb%a4%e7%ad%89%e6%b7%b7%e6%b7%86%e6%8a%80%e6%9c%af\/","title":{"rendered":"\u7b2c\u4e94\u8282\u8bfe\u82b1\u6307\u4ee4\u7b49\u6df7\u6dc6\u6280\u672f"},"content":{"rendered":"\n

\u5f15\u8a00<\/h2>\n\n\n\n

\u672c\u8bfe\u65f6\u5c5e\u4e8e\u6211\u4eec\u4f20\u7edf\u9006\u5411\u4e2d\u8f83\u96be\u7684\u4e00\u90e8\u5206\u4e86\uff0c\u6216\u8bb8\u524d\u9762\u8bb2\u8fc7\u7684\u90fd\u662f\u4ece\u53cd\u6c47\u7f16\u5c42\u5c55\u5f00\uff0c\u8fd9\u8282\u8bfe\u6211\u4eec\u7684\u5b66\u4e60\u5c06\u4f1a\u4ece\u6c47\u7f16\u5c42\u9762\uff08\u82b1\u6307\u4ee4\u8003\u9898\u65b9\u5411\uff09\uff0c\u4ee5\u53ca\u6211\u4eec\u7a0b\u5e8f\u7684\u8fd0\u884c\u903b\u8f91\uff08smc\u8003\u9898\u65b9\u5411\uff09\uff0c\u4ee5\u53ca\u4e00\u4e9b\u66f4\u96be\u4e00\u70b9\u7684\u6df7\u6dc6\uff08VM\u65b9\u5411\u7b49\u7b49\uff09\uff0c\u672c\u8282\u8bfe\u53ea\u80fd\u5e26\u5927\u5bb6\u53bb\u505a\u4e00\u4e2a\u521d\u6b65\u7684\u5b66\u4e60\uff0c\u6df7\u6dc6\u7684\u65b9\u6cd5\u5343\u5947\u767e\u602a\uff0c\u91cd\u8981\u7684\u662f\u7406\u89e3\u5176\u4e2d\u7684\u95e8\u9053\u3002<\/p>\n\n\n\n

\u4e00\u3001\u82b1\u6307\u4ee4<\/h2>\n\n\n\n

\u5148\u7ed9\u51e0\u7bc7\u5e08\u5085\u4eec\u5199\u7684\u6bd4\u8f83\u597d\u7684\u6587\u7ae0\uff0c\u65b9\u4fbf\u5927\u5bb6\u53c2\u8003\u5b66\u4e60:<\/p>\n\n\n\n

\u9006\u5411\u5206\u6790\u57fa\u7840 --- \u82b1\u6307\u4ee4\u5b9e\u73b0\u53ca\u6e05\u9664_jmp\u82b1\u6307\u4ee4\u9006\u5411-CSDN\u535a\u5ba2<\/a><\/p>\n\n\n\n

\u53cd\u6c47\u7f16\u4e0e\u82b1\u6307\u4ee4\u89e3\u6790\uff1a\u4ece\u539f\u7406\u5230\u5b9e\u6218-CSDN\u535a\u5ba2<\/a>.<\/p>\n\n\n\n

[\u539f\u521b][\u82b1\u6307\u4ee4]\u7531\u6613\u5230\u96be\u5168\u9762\u89e3\u6790CTF\u4e2d\u7684\u82b1\u6307\u4ee4-\u9006\u5411\u5de5\u7a0b-\u770b\u96ea\u5b89\u5168\u793e\u533a\uff5c\u4e13\u4e1a\u6280\u672f\u4ea4\u6d41\u4e0e\u5b89\u5168\u7814\u7a76\u8bba\u575b<\/a><\/p>\n\n\n\n

1.\u82b1\u6307\u4ee4\u4ecb\u7ecd<\/h3>\n\n\n\n

\u82b1\u6307\u4ee4\u662f\u4f01\u56fe\u9690\u85cf\u6389\u4e0d\u60f3\u88ab\u9006\u5411\u76f4\u63a5\u62ff\u5230\u53cd\u6c47\u7f16\u7684\u4ee3\u7801\u5757\u7684\u4e00\u79cd\u65b9\u6cd5, \u5728\u771f\u5b9e\u4ee3\u7801\u4e2d\u63d2\u5165\u4e00\u4e9b\u5783\u573e\u4ee3\u7801\u6765\u5f71\u54cd\u7a0b\u5e8f\u7684\u53cd\u6c47\u7f16\uff0c\u540c\u65f6\u8fd8\u4fdd\u8bc1\u539f\u6709\u7a0b\u5e8f\u7684\u6b63\u786e\u6267\u884c\u3002\u82b1\u6307\u4ee4\u4e0d\u662f\u8ba9\u7a0b\u5e8f\u53d8\u5f97\u5982\u82b1\u7f8e\u4e3d\uff0c\u800c\u662f\u6765\u6b3a\u9a97\u6211\u4eec\u7684IDA\u3002\u8fd9\u8fb9\u6211\u4eec\u9700\u8981\u660e\u767d\u53cd\u6c47\u7f16\u7684\u4e24\u79cd\u7b97\u6cd5\u548c\u4e24\u4e2a\u5173\u952e\u5bc4\u5b58\u5668<\/p>\n\n\n\n

\u5e38\u7528\u7684\u4e24\u7c7b\u53cd\u6c47\u7f16\u7b97\u6cd5\uff1a
1.\u7ebf\u6027\u626b\u63cf\u7b97\u6cd5\uff1a\u9010\u884c\u53cd\u6c47\u7f16\uff08\u65e0\u6cd5\u5c06\u6570\u636e\u548c\u5185\u5bb9\u8fdb\u884c\u533a\u5206\uff09
2.\u9012\u5f52\u884c\u8fdb\u7b97\u6cd5\uff1a\u6309\u7167\u4ee3\u7801\u53ef\u80fd\u7684\u6267\u884c\u987a\u5e8f\u8fdb\u884c\u53cd\u6c47\u7f16\u7a0b\u5e8f\u3002<\/p>\n\n\n\n

IDA\u4e2d\u9ed8\u8ba4\u91c7\u7528\u9012\u5f52\u884c\u8fdb\u7b97\u6cd5\uff0c\u867d\u7136\u6709\u4e00\u90e8\u5206\u82b1\u6307\u4ee4\u4f1a\u88ab\u907f\u514d\uff0c\u4f46\u662f\u8fd8\u6709\u8bb8\u591a\u82b1\u6307\u4ee4\u4ecd\u7136\u4f1a\u51fa\u73b0\u5728\u7a0b\u5e8f\u4e2d<\/p>\n\n\n\n

\u4e0b\u9762\u5f15\u7528\u8fd9\u4f4d\u535a\u4e3b\u7684\u535a\u5ba2\u5185\u5bb9\u6765\u8fdb\u884c\u8bb2\u89e3\u53cd\u6c47\u7f16\u4e0e\u82b1\u6307\u4ee4\u89e3\u6790\uff1a\u4ece\u539f\u7406\u5230\u5b9e\u6218-CSDN\u535a\u5ba2<\/a>.<\/p>\n\n\n\n

\u7b2c\u4e00\u7c7b\u82b1\u6307\u4ee4\uff1a<\/strong><\/p>\n\n\n\n

\u6307\u4ee4\u5f62\u5f0f\uff1a<\/strong><\/p>\n\n\n\n

xor eax, eax\/\/eax\u5bc4\u5b58\u5668\u7f6e\u96f6\ntest eax, eax\/\/ZF=1,\u662f\u786e\u5b9a\u6807\u5fd7\u4f4d\u3010test\u4e0d\u4f1a\u5c06\u7ed3\u679c\u653e\u5728\u5bc4\u5b58\u5668\u4e0a,\u5b83\u53ea\u5f71\u54cdZF\u7684\u72b6\u6001\uff0c\u5982\u679cEAX == 0,\u90a3\u4e48ZF = 1\u3011\nje LABEL1\/\/ZF=1\u65f6\u89e6\u53d1\u8df3\u8f6c\u5230\u6b63\u5e38\u6307\u4ee4\u5904LABEL1 \njne LABEL2\/\/ZF=0\u65f6\u89e6\u53d1\u8df3\u8f6c\u5230\u5e72\u6270\u9879\u5904LABEL2\uff0c\u4e0e\u4e0a\u9762\u7684\u6307\u4ee4\u5f62\u6210\u4e92\u8865\u8df3\u8f6c\nLABEL2 :\n\/*\u5e72\u6270\u9879\u6240\u5728*\/\nLABEL1:\n\/*\u6b63\u5e38\u4ee3\u7801*\/<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u7ecf\u9a8c\uff1a\u73b0\u5728\u82b1\u6307\u4ee4\u5927\u591a\u6570\u662f\u786e\u5b9a\u6807\u5fd7\u4f4d\u8df3\u8f6c\uff0c\u7136\u540e\u52a0\u4e0a2\u6bb5\u51fd\u6570\uff0c\u6b63\u786e\u51fd\u6570\u4f1a\u88ab\u5e72\u6270\u51fd\u6570\u6240\u5f71\u54cd\u5bfc\u81f4\u53cd\u6c47\u7f16\u51fa\u73b0\u95ee\u9898\uff0c\u4e00\u7248\u60c5\u51b5\u4e0b\uff0c\u76f4\u63a5nop\u6389\u82b1\u6307\u4ee4\u5373\u53ef\uff0c\u4e5f\u53ef\u52a8\u8c03\u8df3\u8fc7\u82b1\u6307\u4ee4\u90e8\u5206\u6216\u8005\u9644\u52a0\u8c03\u8bd5\uff0c\u7136\u540e\u8fdb\u884c\u9759\u6001\u5206\u6790\u3002<\/p>\n\n\n\n
\u5e38\u89c1\u6709\uff0cjz\uff0cjnz\uff0cjmp\u3002\u3002\u3002\u8fd9\u4e9b\u4f1a\u5bfc\u81f4\u540e\u9762\u7684\u673a\u5668\u7801\u88ab\u8bc6\u522b\u4e3a\u5730\u5740\uff0c\u5bfc\u81f4\u53cd\u6c47\u7f16\u9519\u8bef<\/strong><\/p>\n\n\n\n
\u82b1\u6307\u4ee4\u8f83\u591a\u4e14\u76f8\u540c\u65f6\u53ef\u4ee5\u5199python\u811a\u672c\u53bb\u9664\uff0c\u8fd9\u8fb9\u4e0d\u505a\u8865\u5145\uff0c\u81ea\u884c\u5b66\u4e60\u603b\u7ed3<\/strong><\/p>\n\n\n\n
\u7b2c\u4e8c\u7c7b\u82b1\u6307\u4ee4\uff1a<\/strong><\/p>\n\n\n\n
__asm {\npush eax;\nxor eax, eax;\ntest eax, eax;\njnzLABEL1;\njz LABEL2;\nLABEL1:\n_emit 0xE8;\/\/\u4e0ecall\u52a9\u8bb0\u7b26\u7684\u673a\u5668\u7801\u76f8\u540c\nLABEL2:\nmov byte ptr[a], 0;\ncall LABEL3;\n_emit 0xFF;\/\/\u4e0eadc\u52a9\u8bb0\u7b26\u7684\u5b57\u8282\u7801\u76f8\u540c\nLABEL3:\nadd dword ptr ss : [esp], 8;  \/\/[esp] = [esp] + 8\nret;\n__emit 0x11;\nmov byte ptr[a], 2;\npop eax;\n}<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u8fd9\u91cc0xFF<\/code> \u5728 x86 \u91cc\u53ef\u80fd\u662f inc\/dec\/call\/jmp\/push<\/code> \u7b49\u6307\u4ee4\u65cf\u7684\u524d\u7f00\u5b57\u8282\uff0c\u5177\u4f53\u542b\u4e49\u8981\u770b\u540e\u9762\u7684 ModR\/M \u5b57\u8282\uff0c\u6240\u4ee5\u5355\u72ec\u4e00\u4e2a FF<\/code> \u4f1a\u8ba9 IDA \u8bef\u628a\u540e\u9762\u7684\u5b57\u8282\u4e00\u8d77\u5f53\u6210\u4e00\u6761\u6307\u4ee4\uff0c\u8d77\u5230\u53e6\u4e00\u79cd\u6df7\u6dc6\u4f5c\u7528<\/p>\n\n\n\n
\u5206\u6790\u8fd9\u7c7b\u6c47\u7f16\uff0c\u9700\u8981\u5148\u4e86\u89e3\u4e00\u4e0b\u4e00\u4e9b\u6c47\u7f16\u8f6c\u79fb\u6307\u4ee4call\u548cret\u7684\u539f\u7406<\/strong><\/p>\n\n\n\n
Call\u6307\u4ee4\uff1a<\/strong><\/p>\n\n\n\n
\uff081\uff09call + label\uff1a\u6b64\u5904\u5c06call+ \u6807\u53f7\u7684\u4e0b\u4e00\u6761\u8bed\u53e5\u7684IP\u653e\u5165\u6808\u4e2d\uff0c\u672c\u4f8b\u9898\u4e2d\u76840xFF<\/strong><\/p>\n\n\n\n
\uff082\uff09ret\u6307\u4ee4\uff1a\u5c06call\u6307\u4ee4\u5165\u7ad9\u7684\u5730\u5740\u6570\u636e\u5168\u90e8\u51fa\u6808\u3002<\/strong><\/p>\n\n\n\n
\u603b\u7ed3\uff1a\u7531\u4e8ecall\u6307\u4ee4\u7684\u7279\u6027\uff0ccall\u540e\u7684\u6570\u636e\u4f1a\u88ab\u8bc6\u522b\u4e3a\u4e00\u4e2a\u5730\u5740\uff0c\u5bfc\u81f4\u539f\u672c\u7684call label3\u88ab\u8bc6\u522b\u4e3a\u5730\u5740\uff0c\u5bfc\u81f4\u540e\u7eed\u8bc6\u522b\u5168\u90e8\u9519\u8bef\uff0c\u4f46\u662f\u7a0b\u5e8f\u672c\u8eab\u8fd0\u884c\u4e0d\u4f1a\u6536\u5230\u5f71\u54cd\uff0c\u5728call label3\u65f6\u5148\u5c06\u7a0b\u5e8f\u7684\u8fd4\u56de\u5730\u5740+8\uff08add dword ptr ss : [esp], 8\uff09\u518dret\u8fd4\u56de\uff0c\u4f7f\u7a0b\u5e8f\u53c8\u6b63\u5e38\u7684\u7ee7\u7eed\u8fd0\u884c\u4e86\u3002<\/strong><\/p>\n\n\n\n
\u53bb\u82b1\u6307\u4ee4\uff1a<\/strong><\/p>\n\n\n\n
\uff081\uff09\u53ef\u4ee5\u5c06\u5783\u573e\u6307\u4ee4\u5168\u90e8nop\uff0c\u4ecepush eax\u5f00\u59cb\uff0c\u5230pop eax \u7ed3\u675f<\/strong><\/p>\n\n\n\n
\uff082\uff09\u4e5f\u53ef\u53ea\u628acall\u6307\u4ee4nop\uff0c\u8ba9\u7a0b\u5e8f\u80fd\u591f\u6b63\u5e38\u8bc6\u522b\u5c31\u884c<\/strong><\/p>\n\n\n\n
\uff083\uff09idc\u53bb\u82b1<\/strong><\/p>\n\n\n\n
\u7b2c\u4e09\u7c7b\u82b1\u6307\u4ee4:<\/strong><\/p>\n\n\n\n
Add\u7c7b\u82b1\u6307\u4ee4\uff1a\u5728\u5e72\u6270\u9879\u4e2d\u52a0\u51650x21\uff0c\u4f7f\u6b63\u5e38\u4ee3\u7801\u88ab\u8bc6\u522b\u4e3a\u4e24\u4e2a\u6570\u636e\u6c42\u548c\u4e86\u3002<\/strong><\/p>\n\n\n\n
__asm {\npush ebx;\nxor ebx, ebx;\ntest ebx, ebx;\njnz LABEL5;\njzLABEL6;\nLABEL5:\n_emit 0x21;\/\/\u4e0eand\u52a9\u8bb0\u7b26\u7684\u673a\u5668\u7801\u76f8\u540c\nLABEL6:\npop ebx;\n}<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u53bb\u82b1\uff1a<\/strong><\/p>\n\n\n\n
\uff081\uff09\u5168\u90e8nop\u6389\u4ecepush\u5230pop\u3002<\/strong><\/p>\n\n\n\n
\uff082\uff09\u53ea\u53bb\u6389add<\/strong><\/p>\n\n\n\n
\uff083\uff09Idc\u53bb\u82b1<\/strong><\/p>\n\n\n\n
\u7b2c\u56db\u7c7b\u82b1\u6307\u4ee4:**<\/p>\n\n\n\n
Mov\u6307\u4ee4\uff0c\u4f1a\u5c06\u540e\u9762\u7684\u4ee3\u7801\u8bc6\u522b\u4e3a\u8d4b\u503c\u6307\u4ee4<\/strong><\/p>\n\n\n\n
void example4()\n{\n__asm {\npush ebx;\nxor ebx, ebx;\ntest ebx, ebx;\njnz LABEL7;\njzLABEL8;\nLABEL7:\n_emit 0xC7;\nLABEL8:\npop ebx;\n}\na = 4;\n}\n\u53bb\u82b1\u6307\u4ee4\uff1a\u540c\u7b2c\u4e09\u7c7b\uff0c\u4e0d\u7ec6\u8bf4\u4e86\n\n\u7b2c\u4e94\u7c7b\u82b1\u6307\u4ee4:<\/strong>\n\n\u5229\u75280x83\u6307\u4ee4\u8fd9\u4e2a\u524d\u7f00\u4f7f\u7684\u540e\u9762\u7684\u6307\u4ee4\u88ab\u8bc6\u522b\u4e3aadd\/sub\/cmp\u7b49\u8fd0\u7b97\u6307\u4ee4\uff0c\u5bfc\u81f4\u7a0b\u5e8f\u4e2d\u7684\u8df3\u8f6c\u5730\u5740\u6307\u4ee4\u53d1\u751f\u5f02\u5e38\uff0c\u65e0\u6cd5\u4f7f\u7a0b\u5e8f\u53cd\u6c47\u7f16\u51fa\u6765\u3002\n\n__asm {\ncall LABEL9;\n_emit 0x83;\nLABEL9:\nadd dword ptr ss : [esp], 8;\nret;\n__emit 0xF3;\n}\n\u53bb\u82b1\u540c\u4e0a<\/code><\/pre>\n\n\n\n
\u7b2c\u516d\u7c7b\u82b1\u6307\u4ee4<\/strong><\/p>\n\n\n\n
\u867d\u7136\u4e5f\u662f\u75280xE8\u8fd9\u4e2acall\u6307\u4ee4\u6765\u4f5c\u4e3a\u82b1\u6307\u4ee4\u7684\u5e72\u6270\u9879\uff0c\u4f46\u662f\u524d\u9762\u7684\u8df3\u8f6c\u8bbe\u8ba1\u53d1\u751f\u6539\u53d8\uff0c\u901a\u8fc7\u4f7f\u7528LoadLibrary(\".\/hhhh\")\u8fd9\u6761\u6307\u4ee4\uff0c\u7531\u4e8e\u51fd\u6570\u8fd4\u56de\u503c\uff08<= 32 \u4f4d\uff09\u5fc5\u987b\u653e\u5728 EAX \u5bc4\u5b58\u5668\u91cc\u8fd4\u56de\u4f7f\u51fd\u6570\u8fd4\u56de\u503c\u5b58\u50a8\u4e8eeax\u4e2d\uff0c\u7136\u540e\u5bfc\u81f4eax\u4e3a\u56fa\u5b9a\u503c\u800c\u53d1\u751f\u6307\u5b9a\u8df3\u8f6c\uff0c\u8fd9\u4e2a\u82b1\u6307\u4ee4\u5c5e\u4e8e\u5229\u7528API\u8fd4\u56de\u786e\u5b9a\u503c\uff0c\u914d\u5408\u4e92\u8865\u8df3\u8f6c\u8bed\u53e5\u548c\u6dfb\u52a0\u64cd\u4f5c\u7801\u4f5c\u4e3a\u5e72\u6270\u9879\u5b9e\u73b0\u53cd\u6c47\u7f16\u7684\u6548\u679c\u3002\u4ee3\u7801\u5982\u4e0b<\/strong><\/p>\n\n\n\n
LoadLibrary(\".\/hhhh\");\/\/\u51fd\u6570\u8fd4\u56de\u503c\u5b58\u50a8\u4e8eeax\u4e2d<\/strong><\/p>\n\n\n\n
_asm {\ncmp eax, 0;\njc LABEL6_1;\/\/cf=1\u89e6\u53d1\u8df3\u8f6c\njnc LABEL6_2;\/\/cf=0\u89e6\u53d1\u8df3\u8f6c\nLABEL6_1:\n_emit 0xE8;\/\/\u4e0ecall\u6c47\u7f16\u6307\u4ee4\u5bf9\u5e94\nLABEL6_2:\n}<\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
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\u4e8c\u3001SMC<\/h2>\n\n\n\n
SMC\uff08Self-Modifying Code\uff09\u81ea\u89e3\u5bc6\u6280\u672f\u7b80\u4ecb<\/strong><\/p>\n\n\n\n
SMC\uff08\u81ea\u4fee\u6539\u4ee3\u7801\uff09\u662f\u4e00\u79cd\u5728\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u52a8\u6001\u4fee\u6539\u81ea\u8eab\u4ee3\u7801\u7684\u6280\u672f\uff0c\u5e38\u7528\u4e8e\u8f6f\u4ef6\u4fdd\u62a4\u4e0e\u6076\u610f\u4ee3\u7801\u6df7\u6dc6\u3002\u5728\u81ea\u89e3\u5bc6\u573a\u666f\u4e2d\uff0c\u7a0b\u5e8f\u521d\u59cb\u72b6\u6001\u4e0b\u7684\u5173\u952e\u4ee3\u7801\u901a\u5e38\u4ee5\u52a0\u5bc6\u5f62\u5f0f\u5b58\u5728\uff0c\u53ea\u6709\u5728\u8fd0\u884c\u65f6\u901a\u8fc7\u89e3\u5bc6\u903b\u8f91\u8fd8\u539f\u4e3a\u771f\u5b9e\u6307\u4ee4\uff0c\u4ece\u800c\u5b9e\u73b0\u201c\u9759\u6001\u4e0d\u53ef\u89c1\u3001\u52a8\u6001\u53ef\u6267\u884c\u201d\u7684\u6548\u679c\u3002<\/p>\n\n\n\n
\u5176\u57fa\u672c\u6d41\u7a0b\u4e3a\uff1a\u7a0b\u5e8f\u5165\u53e3\u9996\u5148\u6267\u884c\u4e00\u6bb5\u89e3\u5bc6\u4f8b\u7a0b\uff08Decoder Stub\uff09\uff0c\u8be5\u4f8b\u7a0b\u8bfb\u53d6\u52a0\u5bc6\u4ee3\u7801\u6bb5\uff0c\u5bf9\u5176\u8fdb\u884c\u5f02\u6216\uff08XOR\uff09\u3001\u52a0\u6cd5\u3001\u8f6e\u6362\u6216\u81ea\u5b9a\u4e49\u7b97\u6cd5\u89e3\u5bc6\uff1b\u89e3\u5bc6\u5b8c\u6210\u540e\uff0c\u901a\u8fc7\u8df3\u8f6c\uff08jmp\/call\uff09\u8fdb\u5165\u5df2\u8fd8\u539f\u7684\u771f\u5b9e\u4ee3\u7801\u6267\u884c\u3002\u6267\u884c\u7ed3\u675f\u540e\uff0c\u6709\u4e9b\u6837\u672c\u8fd8\u4f1a\u518d\u6b21\u52a0\u5bc6\u81ea\u8eab\uff0c\u5b9e\u73b0\u201c\u6267\u884c\u5373\u9500\u6bc1\u201d\u7684\u6548\u679c\u3002<\/p>\n\n\n\n
SMC\u6280\u672f\u7684\u6838\u5fc3\u4f18\u52bf\u5728\u4e8e\u5bf9\u6297\u9759\u6001\u5206\u6790\u5de5\u5177\uff0c\u5982 IDA Pro \u6216 Ghidra\uff0c\u4f7f\u53cd\u6c47\u7f16\u7ed3\u679c\u5448\u73b0\u4e3a\u4e71\u7801\u6216\u65e0\u6548\u6307\u4ee4\u3002\u540c\u65f6\u7ed3\u5408\u82b1\u6307\u4ee4\u3001\u63a7\u5236\u6d41\u626d\u66f2\u7b49\u624b\u6bb5\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u9006\u5411\u96be\u5ea6\u3002<\/p>\n\n\n\n
\u5728\u5b9e\u9645\u5206\u6790\u4e2d\uff0c\u5e38\u89c1\u65b9\u6cd5\u5305\u62ec\uff1a\u5185\u5b58\u65ad\u70b9\u8ddf\u8e2a\u89e3\u5bc6\u8fc7\u7a0b\u3001Dump\u89e3\u5bc6\u540e\u4ee3\u7801\u3001\u6216\u5728\u5173\u952e\u8df3\u8f6c\u5904\u622a\u83b7\u771f\u5b9e\u6267\u884c\u6d41\u3002SMC\u867d\u5f3a\uff0c\u4f46\u5176\u8fd0\u884c\u65f6\u5fc5\u7136\u66b4\u9732\u660e\u6587\u903b\u8f91\uff0c\u8fd9\u4e5f\u662f\u9006\u5411\u5206\u6790\u7684\u7a81\u7834\u53e3\u3002<\/p>\n\n\n\n
\u4e09\u3001VM<\/h2>\n\n\n\n
VM\u7ed3\u6784\u7ec4\u6210<\/strong><\/p>\n\n\n\n
\u7a0b\u5e8f\u8fd0\u884c\u65f6\u5019\uff0c\u901a\u8fc7\u89e3\u91ca\u64cd\u4f5c\u7801\uff08opcode\uff09\u901a\u5e38\u4ee5\u4e00\u4e2a\u6570\u7ec4\u6784\u6210\uff0c\u6570\u7ec4\u4e2d\u5b58\u7740\u8bb8\u591a\u6570\u5b57\uff0c\u901a\u8fc7\u4e0d\u540c\u7684\u6570\u5b57\u9009\u62e9\u4e0d\u540c\u7684\u51fd\u6570\uff08handle\uff09\u8fdb\u884c\u64cd\u4f5c<\/p>\n\n\n\n
vm init<\/h3>\n\n\n\n
\u7ed3\u6784\u4f53\u6784\u5efa\uff0c\u91cc\u9762\u5b58\u7740vm\u7684\u6574\u4e2a\u6784\u5efa\u8fc7\u7a0b\uff0c\u5305\u62ec\u7528\u5230\u7684\u5bc4\u5b58\u5668\uff0c\u4ee5\u53ca\u5bf9\u5e94opcode\u8c03\u7528\u76f8\u5173handle\u901a\u8fc7\u5bc4\u5b58\u5668\u6267\u884c\u5230\u76f8\u5173\u64cd\u4f5c<\/p>\n\n\n\n
vmstart<\/h3>\n\n\n\n
\u9010\u6b65\u6267\u884copcode\u4e2d\u7684\u5185\u5bb9<\/p>\n\n\n\n
\u603b\u7ed3\uff1a<\/strong><\/p>\n\n\n\n
\u521b\u5efa\u7ed3\u6784\u4f53\u4ee5\u8bbe\u5b9a\u5bc4\u5b58\u5668\u4e0e\u9700\u8981\u6267\u884c\u7684\u51fd\u6570\u4ee5\u53caopcode<\/p>\n\n\n\n
\u6267\u884c\u7ed3\u6784\u4f53\uff0c\u901a\u8fc7\u8c03\u7528opcode\u8c03\u7528\u76f8\u5173\u503c\u548c\u51fd\u6570\u8fdb\u884c\u52a0\u5bc6\u64cd\u4f5c(\u6b64\u64cd\u4f5c\u8981\u4ed4\u7ec6\u5206\u6790\u6267\u884c\u5668\u662f\u600e\u4e48\u8fd0\u884c\u7684)<\/p>\n\n\n\n
\u5b98\u65b9\u672f\u8bed<\/strong><\/p>\n\n\n\n
opcode\uff1a\u865a\u62df\u6307\u4ee4\u5206\u53d1\u5668<\/p>\n\n\n\n
\u901a\u5e38\u662f\u4ee5\u4e0b\u9762\u7684\u65b9\u5f0f\u51fa\u73b0<\/p>\n\n\n\n
while(i<len(opcode)):\n    if(opcode[i]==0x00):\n        i+=1\n    elif(opcode[i]==0x01):\n        i+=2\n    elif(opcode[i]==0x02):\n        i+=3<\/code><\/pre>\n\n\n\n
\u4e4b\u540eopcode\u5c31\u662f\u6709\u4e00\u5806\u64cd\u4f5c\u6570\u548c\u64cd\u4f5c\u7801\u7ec4\u6210\u4e86\uff0c\u7136\u540e\u8c03\u7528\u6267\u884c\u5668\u5c31\u5bf9opcode\u8fdb\u884c\u51fa\u6808\u5e76\u8fd0\u884c\u64cd\u4f5c<\/p>\n\n\n\n
\u4f8b\u9898\uff1a[GWCTF 2019]babyvm<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u5206\u6790\u53ef\u5f97\uff0c4\u4e2a\u5bc4\u5b58\u5668+\u4e00\u4e2a\u6808\u5e95\u6307\u9488\uff0c\u5176\u4e2d\u7b2c\u4e8c\u4e2a\u4e3a\u6307\u4ee4\u957f\u5ea6\uff0c\u7b2c\u4e94\u4e2a\u4e3a\u8bfb\u53d6\u64cd\u4f5c\u7801<\/p>\n\n\n\n
\u5269\u4e0b\u7684\u6bcf\u4e00\u4e2a\u6570\u5bf9\u5e94\u4e00\u4e2a\u64cd\u4f5c\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u5c31\u662f\u865a\u62df\u673a\u521b\u5efa\uff0c\u5b9a\u4e49\u54ea\u4e9b\u5730\u5740\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u90a3\u4e9b\u7528\u4e8e\u64cd\u4f5c\uff0c<\/p>\n\n\n\n
\u7d27\u63a5\u7740start\u51fd\u6570\u4e2d<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u76f4\u5230\u6d4b\u91cf\u957f\u5ea6\u65f6\u5019\u7ed3\u675f\uff0c\u5426\u8005\u4e00\u76f4\u6267\u884cstart_0<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
start0\u5373\u4e3a\u6267\u884c\u5668\uff0c\u64cd\u4f5c\u6570\u626b\u63cf\uff0c\u53bb\u626b\u8be5\u6267\u884c\u7b2c\u51e0\u4e2a\u64cd\u4f5c\uff0c\u626b\u5230\u4e4b\u540e\u6267\u884c\u5bf9\u5e94\u4f4d\u7f6e\u7684\u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b9a\u4e49mov\u7b49\u64cd\u4f5c\u7684\u65f6\u5019\u5df2\u7ecf\u5bf9pc\u8fdb\u884c\u81ea\u589e\u4e86\uff0c\u4e5f\u5c31\u662f\u4f1a\u53ea\u8981\u8fd0\u884c\u4e00\u6b21\u51fd\u6570\u5c31\u4f1a\u628a\u5168\u5957\u64cd\u4f5c\u6267\u884c\u5b8c\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
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