{"id":581,"date":"2016-01-30T05:00:27","date_gmt":"2016-01-30T05:00:27","guid":{"rendered":"http:\/\/www.inforsec.org\/wp\/?p=581"},"modified":"2016-01-31T09:01:54","modified_gmt":"2016-01-31T09:01:54","slug":"android-app%e4%bf%9d%e6%8a%a4%e5%8f%8a%e7%a0%b4%e8%a7%a3%e9%9d%a2%e9%9d%a2%e8%a7%82","status":"publish","type":"post","link":"http:\/\/202.112.238.40\/wp\/?p=581","title":{"rendered":"Android 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app\u4fdd\u62a4\u7684\u5382\u5546\u3002\u5b83\u4eec\u901a\u5e38\u91c7\u7528\u591a\u79cd\u624b\u6bb5\u6765\u4fdd\u62a4\u548c\u9690\u85cf\u539f\u6709\u7684\u53ef\u6267\u884c\u6587\u4ef6\uff08\u5373dex\u6587\u4ef6\uff09\uff0c\u5e76\u4f7f\u7528\u53cd\u8c03\u8bd5\u6280\u672f\u5728\u8fd0\u884c\u7684\u65f6\u5019\u963b\u6b62\u5bf9\u76f8\u5173\u5185\u5b58\u533a\u57df\u8fdb\u884c\u8bfb\u53d6\u800c\u5f97\u5230\u6709\u6548\u7684dex\u6587\u4ef6\u3002\u540c\u65f6\u4e5f\u4f7f\u7528\u6df7\u6dc6\u6280\u672f\u5982ProGuard\u3001DexGuard\u7b49\u5de5\u5177\u589e\u52a0\u53cd\u7f16\u8bd1\u540e\u7684\u4ee3\u7801\u7684\u5206\u6790\u96be\u5ea6\u3002<\/p>\n<p>Android app\u4fdd\u62a4\u6280\u672f\u4e5f\u662f\u4e00\u628a\u53cc\u5203\u5251\uff0c\u9ed1\u5ba2\u4e5f\u5e7f\u6cdb\u4f7f\u7528\u5b83\u6765\u4fdd\u62a4\u6076\u610f\u548c\u91cd\u6253\u5305\u7684app\uff0c\u4f7f\u5f97\u96be\u4ee5\u88ab\u5206\u6790\u548c\u5224\u5b9a\uff0c\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u63d0\u9ad8\u4e86\u4f20\u64ad\u7684\u8303\u56f4\u3002\u6240\u4ee5\u5bf9\u4e8e\u6076\u610f\u7a0b\u5e8f\u5206\u6790\u4eba\u5458\u6765\u8bf4\uff0c\u751a\u81f3\u5bf9\u4e8e\u8f6f\u4ef6\u76f8\u4f3c\u6027\u68c0\u6d4b\u3001\u4ee3\u7801\u6284\u88ad\u7b49\u76f8\u5173\u7535\u5b50\u53d6\u8bc1\u6280\u672f\uff0c\u7834\u9664app\u7684\u4fdd\u62a4\u4e5f\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u7b2c\u4e00\u6b65\u3002<\/p>\n<p>\u6211\u4eec\u4e3b\u8981\u7814\u7a76\u4e866\u4e2d\u4e3b\u6d41\u7684Android app\u4fdd\u62a4\u5382\u5546\u7684\u4ea7\u54c1\uff1a\u6886\u6886\u3001\u817e\u8baf\u3001\u7231\u52a0\u5bc6\u3001360\u3001\u963f\u91cc\u548c\u767e\u5ea6\uff08\u622a\u6b622015\u5e749\u6708\uff09\u3002\u901a\u8fc7\u76f8\u5173\u7684\u4e00\u4e9b\u5206\u6790\uff0c\u6211\u4eec\u6765\u770b\u4e00\u770b\u8fd9\u4e9b\u5382\u5546\u662f\u5982\u4f55\u6765\u5b9e\u73b0app\u7684\u4fdd\u62a4\u7684\uff1a<\/p>\n<p>360\uff1a\u5c06\u539f\u6709\u7684dex\u6587\u4ef6\u52a0\u5bc6\u540e\u5b58\u50a8\u5728libjiagu.so\/libjiagu_art.so\uff0c\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u91ca\u653e\u5e76\u89e3\u5bc6\u3002<\/p>\n<p>\u963f\u91cc\uff1a\u5c06\u539f\u6709\u7684dex\u6587\u4ef6\u62c6\u5206\u4e3a\u4e24\u90e8\u5206\uff0c\u4e00\u90e8\u5206\u4e3b\u4f53\u4fdd\u5b58\u4e3alibmobisecy.so\uff0c\u53e6\u4e00\u90e8\u5206\u5305\u542b\u4e86\u4e00\u90e8\u5206class_data_item\u548ccode_item\u3002\u5728\u8fd0\u884c\u7684\u65f6\u5019\u5c06\u4e24\u90e8\u5206\u91ca\u653e\u5728\u5185\u5b58\u4e2d\uff0c\u5e76\u4fee\u590d\u76f8\u5173\u7684\u6307\u9488\uff0c\u6062\u590d\u6570\u636e\u4e4b\u95f4\u7684\u8fde\u63a5\u5173\u7cfb\u3002\u540c\u65f6\u4e00\u4e9bannotation_off\u88ab\u8bbe\u7f6e\u4e3a\u65e0\u6548\u7684\u503c\u3002<\/p>\n<p>\u767e\u5ea6\uff1a\u5c06\u4e00\u4e9bclass_data_item\u5b58\u50a8\u5728dex\u6587\u4ef6\u7684\u5916\u90e8\uff0c\u5728\u8fd0\u884c\u65f6\u6062\u590d\u4e0e\u4e3b\u4f53\u7684dex\u7684\u8fde\u63a5\u5173\u7cfb\u3002\u5728dex\u6587\u4ef6\u52a0\u8f7d\u540e\uff0c\u5176\u5934\u90e8\u7684\u9b54\u6570\uff0c\u6821\u9a8c\u548c\u4ee5\u53ca\u7b7e\u540d\u503c\u4f1a\u88ab\u64e6\u9664\u3002\u540c\u65f6\u67d0\u4e9b\u65b9\u6cd5\u88ab\u6539\u5199\uff0c\u4f7f\u5f97\u5176\u5728\u6267\u884c\u524d\u76f8\u5173\u7684\u6307\u4ee4\u624d\u4f1a\u88ab\u6062\u590d\uff0c\u5728\u6267\u884c\u4e4b\u540e\u4fbf\u7acb\u5373\u64e6\u9664\u3002<\/p>\n<p>\u6886\u6886\uff1a\u63d0\u524d\u51c6\u5907\u4e86\u4e00\u4e2aodex\u6216oat\u6587\u4ef6\uff0c\u5e76\u52a0\u5bc6\u4fdd\u5b58\u4e3a\u5916\u90e8\u7684jar\u6587\u4ef6\uff0c\u8fd0\u884c\u65f6\u89e3\u5bc6\uff1b\u540c\u65f6hook\u4e86libc.so\u4e2d\u7684\u4e00\u4e9b\u51fd\u6570\uff0c\u5982read,write, mmap\u7b49\uff0c\u76d1\u89c6\u5176\u64cd\u4f5c\u533a\u57df\u662f\u5426\u5305\u542b\u4e86dex\u7684\u5934\u90e8\uff0c\u4fdd\u8bc1\u65e0\u6cd5\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\u5bf9\u4e8edex\u6587\u4ef6\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<p>\u7231\u52a0\u5bc6\uff1a\u540c\u6837\u662f\u52a0\u5bc6\u539f\u6709\u7684dex\u6587\u4ef6\uff0c\u5728\u8fd0\u884c\u65f6\u6574\u4f53\u91ca\u653e\u5e76\u89e3\u5bc6\uff0c\u53ea\u4e0d\u8fc7\u5176\u91ca\u653e\u7684\u5904\u4e8e\u56fa\u5b9a\u8def\u5f84\u4e0b\u7684\u4e34\u65f6\u6587\u4ef6\u7684\u540d\u5b57\u662f\u968f\u673a\u7684\u3002<\/p>\n<p>\u817e\u8baf\uff1a\u63d0\u4f9b\u9009\u9879\u53ef\u4ee5\u6307\u5b9a\u9700\u8981\u4fdd\u62a4\u7684\u65b9\u6cd5\u3002\u5982\u679c\u67d0\u4e2a\u65b9\u6cd5\u88ab\u4fdd\u62a4\uff0c\u5219\u5728dex\u6587\u4ef6\u4e2d\u7684\u76f8\u5173class_data_item\u4e2d\u65e0\u6cd5\u770b\u5230\u5176\u6570\u636e\uff0c\u5373\u4e3a\u4e00\u4e2a\u5047\u7684class_data_item\uff1b\u5728\u8fd0\u884c\u65f6\u91ca\u653e\u771f\u6b63\u7684class_data_item\u5e76\u8fde\u63a5\u5230dex\u6587\u4ef6\u4e0a\uff0c\u4f46\u662f\u5176code_item\u5374\u4e00\u76f4\u5b58\u5728\u4e8e\u539f\u6709\u7684dex\u6587\u4ef6\u4e2d\u3002\u540c\u6837\u5730\uff0c\u4e00\u4e9bannotation_off\u548cdebug_info_off\u88ab\u586b\u5145\u4e3a\u65e0\u6548\u503c\u6765\u963b\u6b62\u9759\u6001\u53cd\u7f16\u8bd1\u3002\u53ea\u652f\u6301\u5728DVM\u73af\u5883\u4e0b\u8fd0\u884c\u3002<\/p>\n<p>\u8fd9\u4e9b\u4ea7\u54c1\u90fd\u5177\u5907\u53cd\u8c03\u8bd5\u7684\u80fd\u529b\uff0c\u4e5f\u5c31\u662f\u8bf4\u901a\u8fc7\u4f7f\u7528ptrace\u6216JWDP\u7b49\u8c03\u8bd5\u63a5\u53e3\u52a8\u6001\u9644\u52a0\u8c03\u8bd5\u6bd4\u8f83\u56f0\u96be\u3002<\/p>\n<h2>\u4e8c\u3001\u76f8\u5173\u7814\u7a76\u4ecb\u7ecd<\/h2>\n<p>App\u52a0\u56fa\u4f5c\u4e3a\u4e00\u9879\u6280\u672f\u70ed\u70b9\uff0c\u4e4b\u524d\u7684\u7814\u7a76\u4e3b\u8981\u5904\u4e8e\u5de5\u4e1a\u754c\uff0c\u5b66\u672f\u754c\u5bf9\u5176\u5173\u6ce8\u4e0d\u591a\u3002<\/p>\n<p>\u6bd4\u8f83\u8457\u540d\u7684\u53cd\u7f16\u8bd1\u5de5\u5177\u6709backsmali\/smali, Apktool , IDA Pro\u7b49\uff0c\u4f46\u662f\u65e0\u6cd5\u514b\u670dapp\u52a0\u56fa\u7684\u4fdd\u62a4\u3002<\/p>\n<p>Apvrille<sup> [1]<\/sup>\u8f83\u65e9\u5730\u63d0\u51fa\u4e86\u5229\u7528\u52a0\u5bc6\u65b9\u6cd5\u5982\u5f02\u6216\u64cd\u4f5c\u3001DES\u6216AES\u7b97\u6cd5\u6765\u9690\u85cf\u539f\u59cb\u7684\u6307\u4ee4\u3002Strazzere\u5728<sup>[2]<\/sup>\u63d0\u51fa\u5229\u7528\u53cd\u5c04\u65b9\u6cd5\u6765\u8c03\u7528\u4e00\u4e9b\u5173\u952e\u7684\u51fd\u6570\uff0c\u5e76\u5c06\u771f\u6b63\u5730dex\u6587\u4ef6\u4fdd\u5b58\u5728\u8d44\u6e90\u4e2d\u4ee5\u53ca\u4f7f\u7528\u4e00\u4e9b\u53cd\u8c03\u8bd5\u7684\u6280\u672f\u3002Schulz\u5728<sup>[3,4]<\/sup>\u8ba8\u8bba\u4e86\u5229\u7528\u53d8\u91cf\u540d\u548c\u5b57\u7b26\u4e32\u6df7\u6dc6\uff0c\u4ee3\u7801\u52a8\u6001\u52a0\u8f7d\uff0c\u63d2\u5165\u5783\u573e\u6307\u4ee4\u4ee5\u53ca\u5229\u7528JNI\u6765\u5b9e\u73b0dalvik\u4ee3\u7801\u81ea\u4fee\u6539<sup>[5]<\/sup>\uff0c\u8fd9\u4e9b\u6280\u672f\u73b0\u5728\u4ecd\u5728\u88ab\u5e7f\u6cdb\u4f7f\u7528\u3002Apvrille <sup>[6]<\/sup>\u901a\u8fc7\u4fee\u6539encoded_method\u7684\u6570\u636e\u5b9e\u73b0\u4e86\u5bf9\u76f8\u5173\u65b9\u6cd5\u7684\u4fdd\u62a4\u3002Martin\u5728<sup>[7]<\/sup>\u63cf\u8ff0\u4e86\u4e00\u79cd\u65b0\u7684\u4fdd\u62a4\u65b9\u6cd5\u3002\u4eceAndroid 4.0\u8d77\u63d0\u4f9b\u4e86\u4e00\u4e2a\u65b0\u7684\u63a5\u53e3\uff0c\u53ef\u4ee5\u5c06\u4e00\u5757\u5185\u5b58\u4f5c\u4e3adex\u6587\u4ef6\u6253\u5f00\uff0c\u5229\u7528\u6b64\u7279\u6027\u53ef\u4ee5\u8fdb\u4e00\u6b65\u4fdd\u62a4dex\u6587\u4ef6\u7684\u6307\u4ee4\u5e76\u5b9e\u73b0\u52a8\u6001\u6307\u4ee4\u4fee\u6539\u3002Nigam \u5728<sup>[8]<\/sup>\u5206\u6790\u4e86\u5f53\u65f6\u7684\u4e00\u4e9b\u52a0\u56fa\u4ea7\u54c1\u53ca\u5176\u5de5\u4f5c\u539f\u7406\u3002 Strazzere \u5728<sup>[9]<\/sup>\u4ecb\u7ecd\u5e76\u5206\u6790\u4e86\u4e00\u4e9b\u6df7\u6dc6\u5de5\u5177\u5982ProGuard, DexGuard\u548c ALLATORI\u548c\u6886\u6886\u7684\u52a0\u56fa\u4ea7\u54c1\u3002Apvrille \u5728<sup>[10]<\/sup>\u4e2d\u5c06dex\u6587\u4ef6\u5229\u7528AngeCryption<sup>[11]<\/sup>\u5904\u7406\u4e3a\u4e00\u4e2aresource\u6587\u4ef6\u4ece\u800c\u8fdb\u884c\u9690\u85cf\uff0c\u800c\u4e14\u8fd9\u4e2a\u88ab\u52a0\u5bc6\u7684dex\u6587\u4ef6\u53ef\u4ee5\u88ab\u9759\u6001\u6253\u5f00\u663e\u793a\u4e3a\u4e00\u4e2a\u56fe\u7247\uff0c\u540c\u65f6\u5728\u8fd0\u884c\u7684\u65f6\u5019\u53ef\u4ee5\u8fdb\u884c\u89e3\u5bc6\u5e76\u5f97\u5230\u6267\u884c\u3002Apvrille \u5728<sup>[12,13]<\/sup>\u4e5f\u8ba8\u8bba\u4e86\u4e00\u4e9b\u6df7\u6dc6\u5de5\u5177\u548c\u52a0\u56fa\u4ea7\u54c1\u7684\u539f\u7406\uff0c\u5e76\u5206\u6790\u4e86\u4e00\u4e9b\u53ef\u4ee5\u7528\u4e8e\u5e72\u6270\u9759\u6001\u548c\u52a8\u6001\u5206\u6790\u7684\u65b9\u6cd5\u3002YU<sup> [14]<\/sup>\u5206\u6790\u4e86\u4e00\u4e9bAndroid\u52a0\u56fa\u4ea7\u54c1\u7684\u539f\u7406\uff0c\u5e76\u57fa\u4e8eLiME<sup>[15]<\/sup>\u6784\u5efa\u4e86\u4e00\u4e2a\u5de5\u5177\u7528\u4e8e\u83b7\u53d6\u76ee\u6807\u5185\u5b58\u533a\u57df\u7684\u5185\u5bb9\u3002<\/p>\n<p>ZjDroid<sup>[16]<\/sup>\u662f\u57fa\u4e8eXposed\u7684\u8131\u58f3\u5de5\u5177\u3002\u5b83hook\u4e86BaseDexClassLoader\u5bf9\u8c61\u6765\u83b7\u53d6\u5305\u542bdex\u6587\u4ef6\u7684\u76ee\u6807\u5185\u5b58\uff0c\u5b83\u53ea\u652f\u6301DVM\u5e76\u4e14\u9700\u8981root\u6743\u9650\u3002\u5bf9\u4e8e\u963f\u91cc\u7b49\u5c06\u539f\u59cbdex\u6587\u4ef6\u62c6\u5206\u7684\u505a\u6cd5\uff0c\u5b83\u4e5f\u65e0\u6cd5\u514b\u670d\u3002<\/p>\n<p>Park\u5728<sup>[17]<\/sup>\u63d0\u51fa\u4e86\u4e00\u79cd\u65b9\u6cd5\uff1a\u5bf9apk\u8fdb\u884c\u91cd\u65b0\u6253\u5305\uff0c\u5e76\u63d2\u5165\u4e00\u4e2a\u8c03\u7528\u4e86wait-for-debug \u529f\u80fd\u7684\u65b9\u6cd5\uff0c\u4f7f\u5f97app\u5728\u542f\u52a8\u540e\u4f1a\u6682\u505c\u5e76\u7b49\u5f85\u7528\u6237\u5229\u7528JWDP\u8c03\u8bd5\u534f\u8bae\u8fdb\u884c\u8fde\u63a5\u3002\u8fd9\u6837\u53ef\u4ee5\u8c03\u8bd5\u76ee\u6807app\u5e76\u8bfb\u53d6\u5176\u5185\u5b58\u3002\u4f46\u6b64\u65b9\u6cd5\u5f88\u5bb9\u6613\u88ab\u68c0\u6d4b\u7ed5\u8fc7\u4e14\u65e0\u6cd5\u514b\u670d\u53cd\u8c03\u8bd5\u7684\u9650\u5236\u3002<\/p>\n<p>Jung \u5728<sup>[18]<\/sup>\u63d0\u51fa\u4e86\u4e00\u4e2a\u53eb\u505aDABiD\u7684\u8c03\u8bd5\u5668\u3002\u5b83\u53ef\u4ee5\u83b7\u53d6\u5230\u5185\u5b58\u4e2d\u6709\u6548\u7684dex\u6587\u4ef6\u3002\u5b83\u901a\u8fc7\u5c06\u81ea\u5df1\u7684\u6a21\u5757\u6ce8\u5165\u5230\u76ee\u6807app\u7684\u8fdb\u7a0b\u4e2d\uff0c\u76d1\u89c6\u5185\u5b58\u4e2d\u7684\u52a8\u6001\u4fee\u6539\u5305\u62ec\u4ee3\u7801\u81ea\u4fee\u6539\u548c\u52a8\u6001\u7c7b\u52a0\u8f7d\uff0c\u5e76\u5c06\u76f8\u5173\u4fe1\u606f\u53cd\u6620\u5230\u8c03\u8bd5\u5668\u4e2d\u3002\u540c\u6837\u5730\uff0c\u5b83\u4e0d\u652f\u6301ART\u73af\u5883\u3002\u5e76\u4e14\u7531\u4e8e\u5b83\u53ea\u76d1\u89c6\u4e86dex\u6587\u4ef6\u7684\u5185\u5b58\u533a\u57df\uff0c\u6240\u4ee5\u9488\u5bf9\u4e8e\u4fee\u6539Android\u8fd0\u884c\u65f6\u6240\u7ef4\u62a4\u7684\u5bf9\u8c61\u7684\u884c\u4e3a\u65e0\u6cd5\u8fdb\u884c\u76d1\u89c6\u548c\u6355\u83b7\u3002<\/p>\n<h2>\u4e09\u3001\u7834\u89e3\u601d\u8def\u53ca\u5b9e\u73b0<\/h2>\n<p>\u4e4b\u524d\u5bf9\u4e8e\u5404\u79cdapp\u4fdd\u62a4\u7684\u7834\u89e3\u65b9\u6cd5\uff0c\u4e3b\u8981\u8fd8\u662f\u5904\u4e8e\u548capp\u81ea\u8eab\u540c\u6837\u7684\u8fd0\u884c\u7ea7\u522b\uff0c\u6240\u4ee5\u5f88\u5bb9\u6613\u88ab\u68c0\u6d4b\u5230\u5e76\u4e14\u7ed5\u8fc7\uff0c\u6240\u4ee5\u6211\u4eec\u7684\u601d\u8def\u662f\u76f4\u63a5\u63d0\u9ad8\u8131\u58f3\u6a21\u5757\u7684\u7b49\u7ea7\uff0c\u5c06\u5176\u6574\u5408\u5230Android\u7684\u8fd0\u884c\u65f6\u4e2d\uff0c\u5e76\u4f7f\u5f97\u5185\u5b58\u4e2d\u7684dex\u6587\u4ef6\u5f97\u5230\u5c3d\u5927\u7a0b\u5ea6\u7684\u6062\u590d\uff0c\u8fd9\u6837\u88ab\u8fd0\u884c\u65f6\u89e3\u91ca\u548c\u6267\u884c\u7684app\u4fbf\u5f88\u96be\u7ed5\u8fc7\u4e86\uff0c\u800c\u4e14\u4e5f\u8f7b\u6613\u89e3\u51b3\u4e86\u53cd\u8c03\u8bd5\u6280\u672f\u7684\u9650\u5236\u3002<\/p>\n<p>\u6839\u636e\u6b64\u601d\u8def\u6211\u4eec\u8bbe\u8ba1\u4e86DexHunter<sup>[19,20]<\/sup>\uff0c\u5b83\u6574\u5408\u8fdb\u4e86DVM\u548cART\u4e24\u4e2a\u8fd0\u884c\u65f6\u3002\u901a\u8fc7\u7531\u7528\u6237\u6307\u5b9a\u4e00\u4e2a\u7279\u5f81\u5b57\u7b26\u4e32\u6765\u5b9a\u4f4d\u5230\u5305\u542bdex\u4e3b\u4f53\u90e8\u5206\u7684\u5185\u5b58\u533a\u57df\u3002\u8fd9\u4e2a\u7279\u5f81\u5b57\u7b26\u4e32\u4e3b\u8981\u7528\u6765\u5339\u914d\u8fd0\u884c\u65f6\u5f53\u524d\u4f7f\u7528\u7684dex\u6587\u4ef6\u662f\u5426\u662f\u6211\u4eec\u9700\u8981\u7684dex\u6587\u4ef6\u3002\u4e00\u65e6\u83b7\u53d6\u4e86dex\u7684\u4e3b\u4f53\u90e8\u5206\uff0c\u63a5\u4e0b\u6765\u4fbf\u4e3b\u52a8\u52a0\u8f7d\u5e76\u521d\u59cb\u5316dex\u6587\u4ef6\u4e2d\u7684\u6240\u6709class\uff0c\u5c3d\u529b\u4f7f\u5176\u6062\u590d\u5230\u6b63\u5e38\u8fd0\u884c\u7684\u72b6\u6001\u3002\u63a5\u4e0b\u6765\u6211\u4eec\u5c06\u6574\u4e2a\u533a\u57df\u5206\u4e3a\u4e09\u90e8\u5206\uff0c\u91cd\u70b9\u5904\u7406\u5305\u542bclass\u6570\u636e\u7684\u7b2c\u4e8c\u90e8\u5206\u3002\u6211\u4eec\u5bf9\u4e8e\u6bcf\u4e00\u4e2aclass\u8fdb\u884c\u89e3\u6790\uff0c\u5e76\u89c2\u5bdf\u5176\u4e2d\u662f\u5426\u6709\u6570\u636e\u4f4d\u4e8e\u4e3b\u4f53dex\u8303\u56f4\u4e4b\u5916\uff0c\u53ca\u76f8\u5173\u7684\u4fe1\u606f\u662f\u5426\u4e0eAndroid\u8fd0\u884c\u65f6\u6240\u7ef4\u62a4\u7684\u6570\u636e\u4e00\u81f4\uff0c\u5982\u679c\u6709\u6240\u51fa\u5165\uff0c\u5219\u4fee\u6539dex\u6587\u4ef6\u4e2d\u7684\u76f8\u5173\u6570\u636e\uff0c\u5e76\u5c06\u5916\u90e8\u7684\u6570\u636e\u6536\u96c6\u5728\u4e00\u8d77\u91cd\u65b0\u5b58\u50a8\u5728\u5c3e\u90e8\uff0c\u5e76\u4fee\u6b63\u76f8\u5173\u7684\u6307\u9488\uff0c\u8fd9\u6837\u6211\u4eec\u4fbf\u80fd\u591f\u5f97\u5230\u4e00\u4e2a\u5b8c\u6574\u7684dex\u6587\u4ef6\u3002\u6574\u4f53\u7684\u601d\u8def\u5982\u56fe1\u6240\u793a\uff1a<br \/>\n<a href=\"http:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2016\/01\/tu1-1.jpg\" rel=\"attachment wp-att-588\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-588 aligncenter\" src=\"http:\/\/www.inforsec.org\/wp\/wp-content\/uploads\/2016\/01\/tu1-1.jpg\" alt=\"tu1\" width=\"675\" height=\"300\" srcset=\"http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2016\/01\/tu1-1.jpg 675w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2016\/01\/tu1-1-300x133.jpg 300w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2016\/01\/tu1-1-250x111.jpg 250w, http:\/\/202.112.238.40\/wp\/wp-content\/uploads\/2016\/01\/tu1-1-150x67.jpg 150w\" sizes=\"auto, (max-width: 675px) 100vw, 675px\" \/><\/a><\/p>\n<p style=\"text-align: center;\">\u56fe1. DexHunter\u5de5\u4f5c\u539f\u7406<\/p>\n<p>\u5bf9\u4e8e\u4e00\u4e9b\u65e0\u6548\u7684\u5b57\u6bb5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5f97\u5230dex\u6587\u4ef6\u540e\u5c06\u5176\u5168\u90e8\u62b9\u9664\u4e3a0\uff0c\u8fd9\u6837\u4fbf\u4e0d\u4f1a\u5f71\u54cdapktool\u7b49\u5de5\u5177\u8fdb\u884c\u53cd\u7f16\u8bd1\u3002\u5bf9\u4e8e\u767e\u5ea6\u6240\u4f7f\u7528\u7684\u62b9\u9664\u65b9\u6cd5\u6307\u4ee4\u7684\u624b\u6bb5\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u76d1\u63a7DoInvoke (ART) \u548cdvmMterp_invokeMethod (DVM)\u65b9\u6cd5\u5b9e\u65f6\u7684\u63d0\u53d6\u6709\u6548\u6307\u4ee4\uff1b\u4e5f\u53ef\u4ee5\u4fee\u6539\u8fd8\u539f\u7684dex\u6587\u4ef6\uff0c\u53bb\u6389\u8c03\u7528\u767e\u5ea6\u4e2d\u62b9\u9664\u6307\u4ee4\u7684JNI\u65b9\u6cd5\u7684\u6307\u4ee4\uff0c\u8fd9\u6837\u7684\u8bdd\u540c\u6837\u53ef\u4ee5\u4ece\u5185\u5b58\u4e2d\u83b7\u53d6\u6709\u6548\u7684\u6307\u4ee4\u3002<\/p>\n<h2>\u56db\u3001\u6280\u672f\u5c55\u671b<\/h2>\n<p>\u7834\u9664app\u7684\u4fdd\u62a4\uff0c\u4e3b\u8981\u7684\u624b\u6bb5\u5c31\u662f\u4ece\u5185\u5b58\u4e2d\u62ff\u5230\u6709\u6548\u7684\u6267\u884c\u6570\u636e\uff0c\u8fd9\u6837\u5173\u952e\u70b9\u5c31\u5728\u4e8e\u65f6\u673a\u7684\u9009\u62e9\u6216\u4e3b\u52a8\u89e6\u53d1\uff0c\u4ece\u800c\u4fdd\u8bc1\u5185\u5b58\u4e2d\u5b58\u5728\u6709\u6548\u7684\u6570\u636e\u3002\u6240\u4ee5app\u4fdd\u62a4\u6280\u672f\u4e00\u4e2a\u91cd\u8981\u7684\u5173\u6ce8\u70b9\u4e5f\u5c31\u5728\u4e8e\u5982\u4f55\u6253\u4e71\u65f6\u673a\uff0c\u4f7f\u7834\u89e3\u8005\u65e0\u6cd5\u627e\u5230\u4e00\u4e2a\u5173\u952e\u70b9\u6765\u83b7\u53d6\u5230\u6709\u6548\u7684dex\u6587\u4ef6\u3002\u4e0b\u4e00\u6b65\u7684\u53d1\u5c55\u8d8b\u52bf\u662f\u53ef\u80fd\u4f7f\u7528\u865a\u62df\u673a\u58f3\u7684\u6280\u672f\u3002\u867d\u7136\u5b9e\u73b0\u4e0a\u5e76\u6ca1\u6709\u592a\u591a\u969c\u788d\uff0c\u4f46\u662f\u7531\u4e8e\u6548\u7387\u539f\u56e0\uff0c\u8ddd\u79bb\u5b9e\u7528\u8fd8\u662f\u6709\u4e00\u4e9b\u8ddd\u79bb\u7684\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u4e00\u4e2a\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u53ef\u4ee5\u5c06\u5173\u952e\u7684\u4ee3\u7801\u7f16\u5199\u4e3anative\u6307\u4ee4\uff0c\u901a\u8fc7JNI\u6765\u8c03\u7528\uff0c\u589e\u52a0\u9006\u5411\u7684\u96be\u5ea6\u3002\u4e5f\u53ef\u4ee5\u5bf9dex\u4e2d\u7684dalvik\u6307\u4ee4\u8fdb\u884c\u63a7\u5236\u6d41\u6df7\u6dc6\u3002<\/p>\n<p>\u5bf9\u4e8eART\u4e0b\u7684\u4fdd\u62a4\uff0c\u7531\u4e8e\u8bbe\u5907\u4f9d\u8d56\u6027\u7684\u95ee\u9898\uff0c\u5176\u5b9e\u8fd8\u662f\u4f7f\u7528\u89e3\u91ca\u6267\u884c\u7684\u65b9\u5f0f\u6765\u8fd0\u884c\u3002\u7531\u4e8eART\u4e0b\u7684dex\u6587\u4ef6\u9700\u8981\u7f16\u8bd1\u4e3anative\u6307\u4ee4\uff0c\u5c24\u5176\u5bf9\u4e8estatic\u65b9\u6cd5\u7684\u8c03\u7528\uff0c\u4f7f\u7528\u7684\u662f\u786e\u5b9a\u7684\u5730\u5740\u8fdb\u884c\u8c03\u7528\u7684\u3002\u5982\u679c\u60f3\u63d0\u524d\u51c6\u5907\u4e00\u4e2a\u7f16\u8bd1\u597d\u7684oat\u6587\u4ef6\uff0c\u9664\u53bb\u8981\u7ed5\u8fc7\u8fd0\u884c\u65f6\u5bf9\u4e8eoat\u6587\u4ef6\u548cframework\u7684\u5339\u914d\u6821\u9a8c\uff0c\u8fd8\u9700\u8981\u5bf9\u8fd9\u4e9b\u5730\u5740\u6839\u636e\u4e0d\u540c\u8bbe\u5907\u7684framework\u8fdb\u884c\u52a8\u6001patch\u3002\u5982\u679c\u80fd\u5904\u7406\u597d\u8fd9\u4e9b\u7684\u9650\u5236\uff0c\u4fbf\u53ef\u4ee5\u76f4\u63a5\u63d0\u524d\u51c6\u5907\u597dnative\u6307\u4ee4\u7684oat\u6587\u4ef6\uff0c\u540c\u6837\u80fd\u591f\u5927\u5e45\u5ea6\u589e\u52a0\u4fdd\u62a4\u7684\u529b\u5ea6\u3002<\/p>\n<p>\u6700\u540e\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7VMI\u7684\u65b9\u6cd5\uff0c\u76d1\u63a7\u6240\u6709\u5185\u5b58\u5199\u6307\u4ee4\uff0c\u5e76\u8f85\u4ee5\u4eba\u5de5\u5206\u6790\uff0c\u4e5f\u53ef\u4ee5\u9010\u6b65\u5730\u6062\u590d\u51fa\u52a0\u56fa\u5de5\u5177\u7684\u5de5\u4f5c\u539f\u7406\u548c\u6d41\u7a0b\uff0c\u6709\u52a9\u4e8e\u81ea\u52a8\u5316\u5206\u6790\u4e00\u4e9b\u65b0\u7684\u4fdd\u62a4\u6280\u672f\u3002<\/p>\n<h2>\u4f5c\u8005\u7b80\u4ecb<\/h2>\n<p>\u5f20\u8dc3\u9a9e\uff0c\u5b89\u5168\u6280\u672f\u7231\u597d\u8005\uff0c\u770b\u96ea\u793e\u533a\u6210\u5458\uff0c\u957f\u671f\u4ece\u4e8b\u7cfb\u7edf\u53ca\u8f6f\u4ef6\u5b89\u5168\u7814\u7a76\uff0c\u66fe\u4efb\u9999\u6e2f\u7406\u5de5\u5927\u5b66\u7814\u7a76\u52a9\u7406\uff0cHITCON 2015 \u8bb2\u5e08\u3002<\/p>\n<h2>\u53c2\u8003\u6587\u732e\uff1a<\/h2>\n<p>[1] Axelle Apvrille, \u201cCryptography for mobile malware obfuscation,\u201d <a href=\"http:\/\/goo.gl\/jOiYHt\">http:\/\/goo.gl\/jOiYHt<\/a>.<\/p>\n<p>[2] Timothy Strazzere, \u201cDex education: Practicing safe dex,\u201d <a href=\"http:\/\/goo.gl\/U84ja\">http:\/\/goo.gl\/U84ja<\/a>.<\/p>\n<p>[3] P. Schulz, \u201cCode protection in android,\u201d Tech. Rep., 2012.\u00a0<a href=\"https:\/\/net.cs.uni-bonn.de\/fileadmin\/user_upload\/plohmann\/2012-Schulz-Code_Protection_in_Android.pdf\">https:\/\/net.cs.uni-bonn.de\/fileadmin\/user_upload\/plohmann\/2012-Schulz-Code_Protection_in_Android.pdf<\/a><\/p>\n<p>[4] Patrick Schulz, Felix Matenaar, \u201cAndroid reverse engineering &amp; defenses,\u201d <a href=\"https:\/\/goo.gl\/nZEOGm\">https:\/\/goo.gl\/nZEOGm<\/a>, 2013.<\/p>\n<p>[5] Patrick Schulz, \u201cAndroid security analysis challenge: Tampering dalvik bytecode during runtime,\u201d <a href=\"https:\/\/goo.gl\/07QBou\">https:\/\/goo.gl\/07QBou<\/a>, 2013.<\/p>\n<p>[6] Axelle Apvrille, \u201cPlaying hide and seek with dalvik executables,\u201d <a href=\"https:\/\/goo.gl\/LNIJcx\">https:\/\/goo.gl\/LNIJcx<\/a>.<\/p>\n<p>[7] Xavier Martin, \u201cNifty stuff that you can still do with android,\u201d <a href=\"http:\/\/goo.gl\/vEPXsq\">http:\/\/goo.gl\/vEPXsq<\/a>.<\/p>\n<p>[8] Ruchna Nigam, \u201cAndroid packers: Separating from the pack,\u201d <a href=\"http:\/\/goo.gl\/FM0lzc\">http:\/\/goo.gl\/FM0lzc<\/a>.<\/p>\n<p>[9] Tim Strazzere, Jon Sawyer, \u201cAndroid hacker protection level 0,\u201d <a href=\"https:\/\/goo.gl\/agIEmb\">https:\/\/goo.gl\/agIEmb<\/a>.<\/p>\n<p>[10] \u201cHide android applications in images,\u201d <a href=\"https:\/\/goo.gl\/DDZUjA\">https:\/\/goo.gl\/DDZUjA<\/a>.<\/p>\n<p>[11] \u201cAngecryption,\u201d <a href=\"http:\/\/goo.gl\/tb6irJ\">http:\/\/goo.gl\/tb6irJ<\/a>.<\/p>\n<p>[12] Axelle Apvrille, Ruchna Nigam, \u201cObfuscation in android malware, and how to fight back,\u201d <a href=\"https:\/\/goo.gl\/qw38un\">https:\/\/goo.gl\/qw38un<\/a>.<\/p>\n<p>[13] \u201cHow android malware fights,\u201d <a href=\"http:\/\/goo.gl\/4zLoRK\">http:\/\/goo.gl\/4zLoRK<\/a>.<\/p>\n<p>[14] Rowland YU, \u201cAndroid packer: facing the challenges, building solutions,\u201d <a href=\"https:\/\/goo.gl\/xrC8xO\">https:\/\/goo.gl\/xrC8xO<\/a>.<\/p>\n<p>[15] \u201cLime-linux memory extractor,\u201d <a href=\"https:\/\/goo.gl\/JyUopv\">https:\/\/goo.gl\/JyUopv<\/a>.<\/p>\n<p>[16] \u201cZjdroid,\u201d <a href=\"http:\/\/goo.gl\/xFxxNh\">http:\/\/goo.gl\/xFxxNh<\/a>, 2015.<\/p>\n<p>[17] Yeongung Park, \u201cWe can still crack you!\u201d <a href=\"https:\/\/goo.gl\/7PMn0v\">https:\/\/goo.gl\/7PMn0v<\/a>.<\/p>\n<p>[18] Jin-hyuk Jung, Jieun Lee, \u201cDabid, the powerful interactive android debugger for android malware analysis,\u201d <a href=\"https:\/\/goo.gl\/KTbLyx\">https:\/\/goo.gl\/KTbLyx<\/a>.<\/p>\n<p>[19] Y. Zhang, X. Luo, and H. Yin, \u201c<a href=\"http:\/\/www4.comp.polyu.edu.hk\/~csxluo\/DexHunter.pdf\">Dexhunter: Toward extracting hidden code from packed android applications,\u201d in Proc. ESORICS<\/a>, 2015.<\/p>\n<p>[20] \u201cDexHunter\u201d, <a href=\"https:\/\/github.com\/zyq8709\/DexHunter\">https:\/\/github.com\/zyq8709\/DexHunter<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4f5c\u8005\uff1a\u5f20\u8dc3\u9a9e \u5173\u952e\u8bcd\uff1aAndroid\uff0c\u52a0\u56fa\uff0c\u8131\u58f3\uff1b \u4e00\u3001\u4fdd\u62a4\u6280\u672f\u7684\u610f\u4e49\u53ca\u73b0\u72b6 Android\u5e73\u53f0\u81ea\u53d1&#8230; <a class=\"continue-reading-link\" href=\"http:\/\/202.112.238.40\/wp\/?p=581\"> Continue reading <span class=\"meta-nav\">&rarr; <\/span><\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-581","post","type-post","status-publish","format-standard","hentry","category-research"],"_links":{"self":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/581","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=581"}],"version-history":[{"count":7,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/581\/revisions"}],"predecessor-version":[{"id":593,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=\/wp\/v2\/posts\/581\/revisions\/593"}],"wp:attachment":[{"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=581"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=581"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/202.112.238.40\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=581"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}