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\u4e00\uff0cDLL\u7684\u539f\u7406
\n1\uff0c\u52a8\u6001\u94fe\u63a5\u7a0b\u5e8f\u5e93
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2\uff0cDLL\u540e\u95e8\u539f\u7406\u53ca\u7279\u70b9
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\u5e38\u89c1\u7684\u7f16\u5199\u65b9\u6cd5\uff1a
\n(1)\uff0c\u53ea\u6709\u4e00\u4e2aDLL\u6587\u4ef6<\/p>\n
\u8fd9\u7c7b\u540e\u95e8\u5f88\u7b80\u5355\uff0c\u53ea\u628a\u81ea\u5df1\u505a\u6210\u4e00\u4e2aDLL\u6587\u4ef6\uff0c\u5728\u6ce8\u518c\u8868Run\u952e\u503c\u6216\u5176\u4ed6\u53ef\u4ee5\u88ab\u7cfb\u7edf\u81ea\u52a8\u52a0\u8f7d\u7684\u5730\u65b9\uff0c\u4f7f\u7528Rundll32.exe\u6765\u81ea\u52a8\u542f\u52a8\u3002Rundll32.exe\u662f\u4ec0\u4e48\uff1f\u987e\u540d\u601d\u610f\uff0c”\u6267\u884c32\u4f4d\u7684DLL\u6587\u4ef6”\u3002\u5b83\u7684\u4f5c\u7528\u662f\u6267\u884cDLL\u6587\u4ef6\u4e2d\u7684\u5185\u90e8\u51fd\u6570\uff0c\u8fd9\u6837\u5728\u8fdb\u7a0b\u5f53\u4e2d\uff0c\u53ea\u4f1a\u6709Rundll32.exe\uff0c\u800c\u4e0d\u4f1a\u6709DLL\u540e\u95e8\u7684\u8fdb\u7a0b\uff0c\u8fd9\u6837\uff0c\u5c31\u5b9e\u73b0\u4e86\u8fdb\u7a0b\u4e0a\u7684\u9690\u85cf\u3002\u5982\u679c\u770b\u5230\u7cfb\u7edf\u4e2d\u6709\u591a\u4e2aRundll32.exe\uff0c\u4e0d\u5fc5\u60ca\u614c\uff0c\u8fd9\u8bc1\u660e\u7528Rundll32.exe\u542f\u52a8\u4e86\u591a\u5c11\u4e2a\u7684DLL\u6587\u4ef6\u3002\u5f53\u7136\uff0c\u8fd9\u4e9bRundll32.exe\u6267\u884c\u7684DLL\u6587\u4ef6\u662f\u4ec0\u4e48\uff0c\u6211\u4eec\u90fd\u53ef\u4ee5\u4ece\u7cfb\u7edf\u81ea\u52a8\u52a0\u8f7d\u7684\u5730\u65b9\u627e\u5230\u3002<\/p>\n
\u73b0\u5728\uff0c\u6211\u6765\u4ecb\u7ecd\u4e00\u4e0bRundll32.exe\u8fd9\u4e2a\u6587\u4ef6\uff0c\u610f\u601d\u4e0a\u8fb9\u5df2\u7ecf\u8bf4\u8fc7\uff0c\u529f\u80fd\u5c31\u662f\u4ee5\u547d\u4ee4\u884c\u7684\u65b9\u5f0f\u8c03\u7528\u52a8\u6001\u94fe\u63a5\u7a0b\u5e8f\u5e93\u3002\u7cfb\u7edf\u4e2d\u8fd8\u6709\u4e00\u4e2aRundll.exe\u6587\u4ef6\uff0c\u4ed6\u7684\u610f\u601d\u662f”\u6267\u884c16\u4f4d\u7684DLL\u6587\u4ef6”\uff0c\u8fd9\u91cc\u8981\u6ce8\u610f\u4e00\u4e0b\u3002\u5728\u6765\u770b\u770bRundll32.exe\u4f7f\u7528\u7684\u51fd\u6570\u539f\u578b\uff1a
\nVoid CALLBACK FunctionName (
\nHWND hwnd,
\nHINSTANCE hinst,
\nLPTSTR lpCmdLine,
\nInt nCmdShow
\n);<\/p>\n
\u5176\u547d\u4ee4\u884c\u4e0b\u7684\u4f7f\u7528\u65b9\u6cd5\u4e3a\uff1aRundll32.exe DLLname,Functionname [Arguments]
\nDLLname\u4e3a\u9700\u8981\u6267\u884c\u7684DLL\u6587\u4ef6\u540d\uff1bFunctionname\u4e3a\u524d\u8fb9\u9700\u8981\u6267\u884c\u7684DLL\u6587\u4ef6\u7684\u5177\u4f53\u5f15\u51fa\u51fd\u6570\uff1b[Arguments]\u4e3a\u5f15\u51fa\u51fd\u6570\u7684\u5177\u4f53\u53c2\u6570\u3002<\/p>\n
(2)\uff0c\u66ff\u6362\u7cfb\u7edf\u4e2d\u7684DLL\u6587\u4ef6
\n\u8fd9\u7c7b\u540e\u95e8\u5c31\u6bd4\u4e0a\u8fb9\u7684\u5148\u8fdb\u4e86\u4e00\u4e9b\uff0c\u5b83\u628a\u5b9e\u73b0\u4e86\u540e\u95e8\u529f\u80fd\u7684\u4ee3\u7801\u505a\u6210\u4e00\u4e2a\u548c\u7cfb\u7edf\u5339\u914d\u7684DLL\u6587\u4ef6\uff0c\u5e76\u628a\u539f\u6765\u7684DLL\u6587\u4ef6\u6539\u540d\u3002\u9047\u5230\u5e94\u7528\u7a0b\u5e8f\u8bf7\u6c42\u539f\u6765\u7684DLL\u6587\u4ef6\u65f6\uff0c DLL\u540e\u95e8\u5c31\u542f\u4e00\u4e2a\u8f6c\u53d1\u7684\u4f5c\u7528\uff0c\u628a”\u53c2\u6570”\u4f20\u9012\u7ed9\u539f\u6765\u7684DLL\u6587\u4ef6\uff1b\u5982\u679c\u9047\u5230\u7279\u6b8a\u7684\u8bf7\u6c42\u65f6\uff08\u6bd4\u5982\u5ba2\u6237\u7aef\uff09\uff0cDLL\u540e\u95e8\u5c31\u5f00\u59cb\uff0c\u542f\u52a8\u5e76\u8fd0\u884c\u4e86\u3002\u5bf9\u4e8e\u8fd9\u7c7b\u540e\u95e8\uff0c\u628a\u6240\u6709\u64cd\u4f5c\u90fd\u5728DLL\u6587\u4ef6\u4e2d\u5b9e\u73b0\u6700\u4e3a\u5b89\u5168\uff0c\u4f46\u9700\u8981\u7684\u7f16\u7a0b\u77e5\u8bc6\u4e5f\u975e\u5e38\u591a\uff0c\u4e5f\u975e\u5e38\u4e0d\u5bb9\u6613\u7f16\u5199\u3002\u6240\u4ee5\uff0c\u8fd9\u7c7b\u540e\u95e8\u4e00\u822c\u90fd\u662f\u628aDLL\u6587\u4ef6\u505a\u6210\u4e00\u4e2a”\u542f\u52a8”\u6587\u4ef6\uff0c\u5728\u9047\u5230\u7279\u6b8a\u7684\u60c5\u51b5\u4e0b\uff08\u6bd4\u5982\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff09\uff0c\u5c31\u542f\u52a8\u4e00\u4e2a\u666e\u901a\u7684EXE\u540e\u95e8\uff1b\u5728\u5ba2\u6237\u7aef\u7ed3\u675f\u8fde\u63a5\u4e4b\u540e\uff0c\u628aEXE\u540e\u95e8\u505c\u6b62\uff0c\u7136\u540eDLL\u6587\u4ef6\u8fdb\u5165”\u4f11\u606f”\u72b6\u6001\uff0c\u5728\u4e0b\u6b21\u5ba2\u6237\u7aef\u8fde\u63a5\u4e4b\u524d\uff0c\u90fd\u4e0d\u4f1a\u542f\u52a8\u3002\u4f46\u968f\u7740\u5fae\u8f6f\u7684”\u6570\u5b57\u7b7e\u540d”\u548c”\u6587\u4ef6\u6062\u590d”\u7684\u529f\u80fd\u51fa\u53f0\uff0c\u8fd9\u79cd\u540e\u95e8\u5df2\u7ecf\u9010\u6b65\u8870\u843d\u3002<\/p>\n
\u63d0\u793a\uff1a
\n\u5728WINNT\\system32\u76ee\u5f55\u4e0b\uff0c\u6709\u4e00\u4e2adllcache\u6587\u4ef6\u5939\uff0c\u91cc\u8fb9\u5b58\u653e\u7740\u4f17\u591aDLL\u6587\u4ef6\uff08\u4e5f\u5305\u62ec\u4e00\u4e9b\u91cd\u8981\u7684EXE\u6587\u4ef6\uff09\uff0c\u5728DLL\u6587\u4ef6\u88ab\u975e\u6cd5\u4fee\u6539\u4e4b\u540e\uff0c\u7cfb\u7edf\u5c31\u4ece\u8fd9\u91cc\u6765\u6062\u590d\u88ab\u4fee\u6539\u7684DLL\u6587\u4ef6\u3002\u5982\u679c\u8981\u4fee\u6539\u67d0\u4e2aDLL\u6587\u4ef6\uff0c\u9996\u5148\u5e94\u8be5\u628adllcache\u76ee\u5f55\u4e0b\u7684\u540c\u540dDLL\u6587\u4ef6\u5220\u9664\u6216\u66f4\u540d\uff0c\u5426\u5219\u7cfb\u7edf\u4f1a\u81ea\u52a8\u6062\u590d\u3002<\/p>\n
(3)\uff0c\u52a8\u6001\u5d4c\u5165\u5f0f
\n\u8fd9\u624d\u662fDLL\u540e\u95e8\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u3002\u5176\u610f\u4e49\u662f\u5c06DLL\u6587\u4ef6\u5d4c\u5165\u5230\u6b63\u5728\u8fd0\u884c\u7684\u7cfb\u7edf\u8fdb\u7a0b\u5f53\u4e2d\u3002\u5728Windows\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u79c1\u6709\u5185\u5b58\u7a7a\u95f4\uff0c\u4f46\u8fd8\u662f\u6709\u79cd\u79cd\u65b9\u6cd5\u6765\u8fdb\u5165\u5176\u8fdb\u7a0b\u7684\u79c1\u6709\u5185\u5b58\u7a7a\u95f4\uff0c\u6765\u5b9e\u73b0\u52a8\u6001\u5d4c\u5165\u5f0f\u3002\u7531\u4e8e\u7cfb\u7edf\u7684\u5173\u952e\u8fdb\u7a0b\u662f\u4e0d\u80fd\u7ec8\u6b62\u7684\uff0c\u6240\u4ee5\u8fd9\u7c7b\u540e\u95e8\u975e\u5e38\u9690\u853d\uff0c\u67e5\u6740\u4e5f\u975e\u5e38\u56f0\u96be\u3002\u5e38\u89c1\u7684\u52a8\u6001\u5d4c\u5165\u5f0f\u6709\uff1a”\u6302\u63a5API””\u5168\u5c40\u94a9\u5b50\uff08HOOK\uff09””\u8fdc\u7a0b\u7ebf\u7a0b”\u7b49\u3002<\/p>\n
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3\uff0cDLL\u540e\u95e8\u7684\u542f\u52a8\u7279\u6027<\/p>\n
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\n\u4e8c\uff0cDLL\u7684\u6e05\u9664
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1\uff0cPortLess BackDoor
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\n1\uff0c \u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u7ec4\uff0c\u5728\u7ec4\u91cc\u6dfb\u52a0\u670d\u52a1\u540d
\n2\uff0c \u5728\u73b0\u6709\u7ec4\u91cc\u6dfb\u52a0\u670d\u52a1\u540d
\n3\uff0c \u76f4\u63a5\u4f7f\u7528\u73b0\u6709\u7ec4\u91cc\u7684\u4e00\u4e2a\u670d\u52a1\u540d\uff0c\u4f46\u662f\u672c\u673a\u6ca1\u6709\u5b89\u88c5\u7684\u670d\u52a1
\n4\uff0c \u4fee\u6539\u73b0\u6709\u7ec4\u91cc\u7684\u73b0\u6709\u670d\u52a1\uff0c\u628a\u5b83\u7684ServiceDll\u6307\u5411\u81ea\u5df1\u7684DLL\u540e\u95e8<\/p>\n
\u6211\u6d4b\u8bd5\u7684PortLess BackDoor\u4f7f\u7528\u7684\u7b2c\u4e09\u79cd\u65b9\u6cd5\u3002
\n\u597d\u4e86\uff0c\u6211\u60f3\u5927\u5bb6\u770b\u5b8c\u4e86\u4e0a\u8fb9\u7684\u539f\u7406\uff0c\u4e00\u5b9a\u53ef\u4ee5\u60f3\u5230\u6211\u4eec\u6e05\u9664PortLess BackDoor\u7684\u65b9\u6cd5\u4e86\uff0c\u5bf9\uff0c\u5c31\u662f\u5728\u6ce8\u518c\u8868\u7684Svchost\u952e\u4e0b\u505a\u6587\u7ae0\u3002\u597d\uff0c\u6211\u4eec\u73b0\u5728\u5f00\u59cb\u3002<\/p>\n
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2\uff0cBITS.dll
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3\uff0cNOIR–QUEEN
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\u4e09\uff0cDLL\u7684\u9632\u8303
\n\u770b\u4e86\u4e0a\u8fb9\u7684\u4f8b\u5b50\uff0c\u6211\u60f3\u5927\u5bb6\u5bf9\u6e05\u9664DLL\u540e\u95e8\u7684\u65b9\u6cd5\u6709\u4e86\u4e00\u5b9a\u7684\u4e86\u89e3\uff0c\u4f46\u5728\u73b0\u5b9e\u4e2d\uff0cDLL\u540e\u95e8\u5e76\u4e0d\u4f1a\u4f7f\u7528\u9ed8\u8ba4\u7684\u6587\u4ef6\u540d\uff0c\u6240\u4ee5\u4f60\u4e5f\u5c31\u4e0d\u80fd\u80af\u5b9a\u662f\u5426\u4e2d\u4e86DLL\u540e\u95e8\u3002\u5bf9\u4e8eDLL\u540e\u95e8\uff0csystem32\u76ee\u5f55\u4e0b\u662f\u4e2a\u597d\u5730\u65b9\uff0c\u5927\u591a\u6570\u540e\u95e8\u4e5f\u662f\u5982\u6b64\uff0c\u6240\u4ee5\u8fd9\u91cc\u8981\u975e\u5e38\u6ce8\u610f\u3002\u4e0b\u9762\u6211\u6765\u5177\u4f53\u4ecb\u7ecd\u4e00\u4e0b\u600e\u4e48\u53d1\u73b0DLL\u540e\u95e8\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
1\uff0c\u5b89\u88c5\u597d\u7cfb\u7edf\u548c\u6240\u6709\u7684\u5e94\u7528\u7a0b\u5e8f\u4e4b\u540e\uff0c\u5907\u4efdsystem32\u76ee\u5f55\u4e0b\u7684EXE\u548cDLL\u6587\u4ef6\uff1a\u6253\u5f00CMD\uff0c\u6765\u5230WINNT\\system32\u76ee\u5f55\u4e0b\uff0c\u6267\u884c\uff1adir *.exe>exe.txt & dir *.dll>dll.txt\uff0c\u8fd9\u6837\uff0c\u5c31\u4f1a\u628a\u6240\u6709\u7684EXE\u548cDLL\u6587\u4ef6\u5907\u4efd\u5230exe.txt\u548cdll.txt\u6587\u4ef6\u4e2d\uff1b\u65e5\u540e\uff0c\u5982\u53d1\u73b0\u5f02\u5e38\uff0c\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684\u547d\u4ee4\u518d\u6b21\u5907\u4efdEXE\u548cDLL\u6587\u4ef6(\u8fd9\u91cc\u6211\u4eec\u5047\u8bbe\u662fexe0.txt\u548cdll0.txt)\uff0c\u5e76\u4f7f\u7528\uff1afc exe.txt exe0.txt>exedll.txt & fc dll.txt dll0.txt>exedll.txt\uff0c\u5176\u610f\u601d\u4e3a\u4f7f\u7528FC\u547d\u4ee4\u6bd4\u8f83\u4e24\u6b21\u7684EXE\u6587\u4ef6\u548cDLL\u6587\u4ef6\uff0c\u5e76\u5c06\u6bd4\u8f83\u7ed3\u679c\u4fdd\u5b58\u5230exedll.txt\u6587\u4ef6\u4e2d\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u53d1\u73b0\u591a\u51fa\u6765\u7684EXE\u548cDLL\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7\u6587\u4ef6\u5927\u5c0f\uff0c\u521b\u5efa\u65f6\u95f4\u6765\u5224\u65ad\u662f\u5426\u662fDLL\u540e\u95e8\u3002<\/p>\n
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