{"id":28846,"date":"2016-09-09T09:00:04","date_gmt":"2016-09-09T01:00:04","guid":{"rendered":"https:\/\/blog.trendmicro.com.tw\/?p=28846"},"modified":"2016-09-08T11:17:16","modified_gmt":"2016-09-08T03:17:16","slug":"%e4%bb%a5%e7%a5%9e%e5%a5%87%e5%af%b6%e8%b2%9d%e6%9c%88%e7%b2%be%e9%9d%88%e7%82%ba%e5%90%8d%e7%9a%84-umbreon-rootkit-%e6%94%bb%e6%93%8a-x86-%e5%92%8c-arm-%e8%99%95%e7%90%86%e5%99%a8%e7%9a%84-linux","status":"publish","type":"post","link":"https:\/\/blog.trendmicro.com.tw\/?p=28846","title":{"rendered":"\u9019\u88e1\u6709\u96bb\u795e\u5947\u5bf6\u8c9d,\u662f\u6703\u653b\u64ca Linux \u7cfb\u7d71\u7684\u6708\u7cbe\u9748!"},"content":{"rendered":"<h2>\u4ee5\u795e\u5947\u5bf6\u8c9d\u6708\u7cbe\u9748\u70ba\u540d\u7684 Umbreon Rootkit , \u653b\u64ca x86 \u548c ARM \u8655\u7406\u5668\u7684 Linux \u7cfb\u7d71<\/h2>\n<p><a href=\"https:\/\/www.trendmicro.com.tw\/edm\/Tracking.asp?id=2651&amp;name=20110916\">\u8da8\u52e2\u79d1\u6280<\/a>\u524d\u77bb\u5a01\u8105\u7814\u7a76 (FTR) \u5718\u968a\u6700\u8fd1\u53d6\u5f97\u4e86\u4e00\u500b\u65b0\u7684 Rootkit\u5bb6\u65cf\u6a23\u672c\u3002\u6b64 Rootkit \u5bb6\u65cf\u7684\u540d\u5b57\u53eb\u505a\u300cUmbreon\u300d(\u8207\u7b2c 197 \u865f\u795e\u5947\u5bf6\u8c9d\u300c\u6708\u7cbe\u9748\u300d\u540c\u540d)\uff0c\u6703\u653b\u64ca Intel \u548c ARM \u8655\u7406\u5668\u7684 Linux \u7cfb\u7d71\uff0c\u56e0\u6b64\u4e00\u4e9b\u5167\u5d4c\u5f0f\u88dd\u7f6e\u4e5f\u53ef\u80fd\u906d\u6b83\u3002(\u8a3b\uff1a\u6b64 Rootkit \u9084\u771f\u7b26\u5408\u9019\u96bb\u795e\u5947\u5bf6\u8c9d\u7684\u7279\u6027\uff0c\u56e0\u70ba\u6708\u7cbe\u9748\u559c\u6b61\u8eb2\u5728\u9ed1\u6f06\u6f06\u7684\u591c\u88e1\uff0c\u6240\u4ee5\u8207 Rootkit \u7684\u7279\u6027\u543b\u5408\u3002)<\/p>\n<p>\u6211\u5011\u5df2\u91dd\u5c0d\u9019\u500b Rootkit \u9032\u884c\u4e86\u8a73\u7d30\u5206\u6790\uff0c\u4e26\u4e14\u5c07\u6a23\u672c\u63d0\u4f9b\u7d66\u696d\u754c\u4f86\u5354\u52a9\u8cc7\u5b89\u754c\u6514\u622a\u6b64\u5a01\u8105\u3002<\/p>\n<p><span style=\"color: #666699;\">\u7de8\u6309: Rootkit\u662f\u4e00\u7a2e\u6280\u8853\uff0c\u7528\u9014\u5728\u4fee\u6539\u7cfb\u7d71\u6838\u5fc3\u4ee5\u4fbf\u96b1\u85cf\u7279\u5b9a\u7684\u6a94\u6848\u6216\u662f\u8655\u7406\u7a0b\u5e8f\uff0c\u751a\u81f3\u662f\u767b\u9304\u503c\uff0e\u4e5f\u56e0\u6b64\u5e38\u5e38\u6703\u88ab\u75c5\u6bd2\u62ff\u4f86\u5229\u7528\u4f5c\u70ba\u8eb2\u907f\u8ffd\u67e5\u7684\u624b\u6cd5\u4e4b\u4e00<\/span><\/p>\n<p>Umbreon \u7684\u767c\u5c55\u59cb\u65bc 2015 \u5e74\u521d\uff0c\u4f46\u5176\u4f5c\u8005\u81f3\u5c11\u5f9e 2013 \u5e74\u8d77\u5373\u6d3b\u8e8d\u65bc<a href=\"https:\/\/www.trendmicro.com\/vinfo\/us\/security\/threat-intelligence-center\/deep-web\/\">\u7db2\u8def\u72af\u7f6a\u5730\u4e0b\u7db2\u8def<\/a>\u3002\u6839\u64da\u4e00\u4e9b\u99ed\u5ba2\u5728\u5730\u4e0b\u8ad6\u58c7\u548c IRC \u983b\u9053\u4e0a\u7684\u8aaa\u6cd5\uff0cUmbreon \u975e\u5e38\u96e3\u4ee5\u5075\u6e2c\u3002\u6211\u5011\u7684\u7814\u7a76\u5df2\u627e\u51fa\u8a72 Rootkit \u7684\u904b\u4f5c\u65b9\u5f0f\u4ee5\u53ca\u5b83\u5982\u4f55\u8eb2\u85cf\u5728 Linux \u7cfb\u7d71\u7576\u4e2d\u3002<\/p>\n<p>Umbreon \u662f\u7d93\u7531\u99ed\u5ba2\u624b\u52d5\u5b89\u88dd\u5230\u53d7\u5bb3\u88dd\u7f6e\u6216\u4f3a\u670d\u5668\u4e0a\u3002\u5b89\u88dd\u4e4b\u5f8c\uff0c\u99ed\u5ba2\u5373\u53ef\u7d93\u7531\u8a72\u7a0b\u5f0f\u4f86\u9059\u63a7\u53d7\u5bb3\u88dd\u7f6e\u3002<\/p>\n<p><strong><em>\u4f55\u8b02 Ring 3 Rootkit\uff1f<\/em><\/strong><\/p>\n<p>Rootkit \u662f\u4e00\u7a2e\u96e3\u4ee5\u5075\u6e2c\u53ca\u767c\u73fe\u7684\u6301\u7e8c\u6027\u5a01\u8105\u3002\u5b83\u7684\u529f\u7528\u5c31\u662f\u8981\u8b93\u81ea\u5df1 (\u8207\u5176\u4ed6\u60e1\u610f\u7a0b\u5f0f) \u80fd\u5920\u8eb2\u904e\u7cfb\u7d71\u7ba1\u7406\u54e1\u3001\u8cc7\u5b89\u5206\u6790\u5e2b\u3001\u4f7f\u7528\u8005\u3001\u6383\u7784\u5f15\u64ce\u3001\u9451\u8b58\u5206\u6790\u4ee5\u53ca\u7cfb\u7d71\u5de5\u5177\u7684\u5075\u6e2c\u3002\u6b64\u5916\uff0c\u5b83\u4e5f\u53ef\u7528\u4f86\u958b\u555f\u4e00\u9053\u5f8c\u9580\uff0c\u6216\u8005\u900f\u904e\u5e55\u5f8c\u64cd\u7e31 (C&amp;C) \u4f3a\u670d\u5668\u8b93\u99ed\u5ba2\u5f9e\u9060\u7aef\u6697\u4e2d\u9059\u63a7\u53ca\u76e3\u63a7\u53d7\u5bb3\u6a5f\u5668\u3002<\/p>\n<p>\u9019\u985e\u7a0b\u5f0f\u6709\u5e7e\u7a2e\u57f7\u884c\u6a21\u5f0f\uff0c\u5206\u5225\u5177\u5099\u4e0d\u540c\u7684\u5b58\u53d6\u6b0a\u9650\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u8005\u6a21\u5f0f (Ring 3)<\/li>\n<li>\u6838\u5fc3\u6a21\u5f0f (Ring 0)<\/li>\n<li>\u865b\u64ec\u5316\u76e3\u7ba1\u7a0b\u5f0f (Hypervisor) \u6a21\u5f0f (Ring -1)<\/li>\n<li>\u7cfb\u7d71\u7ba1\u7406\u6a21\u5f0f (SMM) (Ring -2)<\/li>\n<\/ul>\n<p>\u6b64\u5916\uff0c\u4e00\u4e9b\u7814\u7a76\u4e5f\u767c\u5c55\u51fa\u4e00\u7a2e\u5728\u4e3b\u6a5f\u677f\u6216\u5176\u4ed6\u88dd\u7f6e\u7684\u67d0\u4e9b\u6676\u7247\u4e0a\u57f7\u884c\u7684 Rookit\uff0c\u9019\u985e Rootkit \u7684\u57f7\u884c\u6a21\u5f0f\u70ba Ring -3\u3002\u5728\u8d8a\u5e95\u5c64\u57f7\u884c\u7684 Rootkit \u5c31\u8d8a\u96e3\u5075\u6e2c\u53ca\u8655\u7406\uff0c\u4f46\u9019\u4e26\u4e0d\u8868\u793a Ring 3 \u7684 Rootkit \u5c31\u5f88\u5bb9\u6613\u6e05\u9664\u3002<\/p>\n<p>Ring 3 (\u4e5f\u5c31\u662f\u5728\u4f7f\u7528\u8005\u6a21\u5f0f\u57f7\u884c\u7684) Rootkit \u96d6\u4e0d\u6703\u5728\u7cfb\u7d71\u4e0a\u5b89\u88dd\u4e00\u4e9b\u7cfb\u7d71\u6838\u5fc3\u7269\u4ef6\uff0c\u4f46\u537b\u6703\u6514\u622a (hook) \u7cfb\u7d71\u7684\u6838\u5fc3\u51fd\u5f0f\u5eab\uff0c\u9019\u4e9b\u51fd\u5f0f\u5eab\u662f\u4e00\u822c\u7a0b\u5f0f\u547c\u53eb\u7cfb\u7d71\u91cd\u8981\u529f\u80fd\u7684\u4ecb\u9762\uff0c\u4f8b\u5982\uff1a\u8b80\/\u5beb\u6a94\u6848\u3001\u7522\u751f\u57f7\u884c\u7a0b\u5e8f\u3001\u50b3\u9001\u7db2\u8def\u5c01\u5305\u3002\u56e0\u6b64\uff0c\u5c31\u7b97\u662f\u5728\u4f7f\u7528\u8005\u6a21\u5f0f\u4e0b\u57f7\u884c\uff0c\u9019\u985e Rootkit \u4e5f\u53ef\u80fd\u6709\u8fa6\u6cd5\u76e3\u63a7\u751a\u81f3\u6539\u8b8a\u4f5c\u696d\u7cfb\u7d71\u7684\u904b\u4f5c\u3002<\/p>\n<p>\u5728 Linux \u7cfb\u7d71\u4e0a\uff0c\u7576\u67d0\u500b\u7a0b\u5f0f\u547c\u53eb <em>printf()<\/em> \u9019\u500b\u51fd\u5f0f\u6642\uff0c\u8a72\u51fd\u5f0f\u6703\u518d\u547c\u53eb\u540c\u4e00\u51fd\u5f0f\u5eab\u5167\u4e00\u9023\u4e32\u7684\u5176\u4ed6\u51fd\u5f0f\uff0c\u5982\uff1a<em>_IO_printf()<\/em> \u548c<em> vprintf()<\/em>\u3002\u800c\u9019\u4e9b\u51fd\u5f0f\u6700\u7d42\u6703\u547c\u53eb <em>write()<\/em> \u9019\u500b\u7cfb\u7d71\u547c\u53eb (syscall)\u3002\u4e00\u500b Ring 0 \u7684 Rootkit \u6703\u76f4\u63a5\u5728\u6838\u5fc3\u6a21\u5f0f\u4e0b\u6514\u622a\u9019\u500b\u7cfb\u7d71\u547c\u53eb (\u4f46\u9019\u9700\u8981\u5728\u7cfb\u7d71\u7576\u4e2d\u63d2\u5165\u6838\u5fc3\u7269\u4ef6\/\u6a21\u7d44)\uff0c\u53cd\u89c0\u4e00\u500b Ring 3 \u7684 Rootkit \u53ea\u9700\u6514\u622a\u4f7f\u7528\u8005\u6a21\u5f0f\u4e0b\u7684\u67d0\u4e9b\u4e2d\u9593\u51fd\u5f0f\uff0c\u4e0d\u9700\u64b0\u5beb\u6838\u5fc3\u6a21\u5f0f\u4e0b\u7684\u539f\u751f\u7a0b\u5f0f\u78bc (\u56e0\u70ba\u9019\u6709\u76f8\u7576\u7684\u96e3\u5ea6)\u3002<\/p>\n<p><strong><em>\u8de8\u5e73\u53f0\u529f\u80fd<\/em><\/strong><\/p>\n<p>Umbreon \u53ef\u5728\u4e09\u500b\u4e0d\u540c\u5e73\u53f0\u4e0a\u57f7\u884c\uff1ax86\u3001x86-64 \u548c ARM (Raspberry Pi)\u3002\u9019\u5957 Rootkit \u7684\u53ef\u651c\u6027\u975e\u5e38\u9ad8\uff0c\u56e0\u70ba\u5b83\u4e26\u672a\u7528\u5230\u4efb\u4f55\u7d81\u5b9a\u5e73\u53f0\u7684\u7a0b\u5f0f\u78bc\uff1a\u9019\u5957 Rootkit \u9664\u4e86\u4e00\u4e9b\u8f14\u52a9\u5de5\u5177\u662f\u4ee5 Python \u548c Bash \u7b49\u8173\u672c\u8a9e\u8a00\u64b0\u5beb\u4e4b\u5916\uff0c\u7d14\u7cb9\u662f\u4ee5 C \u8a9e\u8a00\u64b0\u5beb\u3002<\/p>\n<p><a href=\"https:\/\/www.trendmicro.com.tw\/edm\/Tracking.asp?id=2651&amp;name=20110916\">\u8da8\u52e2\u79d1\u6280<\/a>\u5224\u65b7\u4f5c\u8005\u61c9\u8a72\u662f\u523b\u610f\u9019\u9ebc\u505a\uff0c\u597d\u8b93 Umbreon\u8f15\u9b06\u652f\u63f4\u524d\u8ff0\u4e09\u7a2e\u5e73\u53f0\u3002<\/p>\n<p><strong><em>\u5f8c\u9580\u8a8d\u8b49\u6a5f\u5236<\/em><\/strong><\/p>\n<p>Umbreon \u5728\u5b89\u88dd\u904e\u7a0b\u7576\u4e2d\u6703\u5728 Linux \u7cfb\u7d71\u4e0a\u5efa\u7acb\u4e00\u500b\u4f7f\u7528\u8005\u5e33\u865f\u8b93\u99ed\u5ba2\u7d93\u7531\u5f8c\u9580\u9032\u51fa\u53d7\u5bb3\u7684\u7cfb\u7d71\u3002\u9019\u500b\u5f8c\u9580\u5e33\u865f\u53ef\u7d93\u7531 Linux \u652f\u63f4\u7684\u4efb\u4f55\u8a8d\u8b49\u6a5f\u5236 (\u5982 SSH) \u4f86\u5b58\u53d6\uff0c\u53ea\u9700\u900f\u904e\u4e00\u500b\u5916\u639b\u7684\u8a8d\u8b49\u6a21\u7d44 (PAM) \u5373\u53ef\u3002<\/p>\n<p>\u8a72\u4f7f\u7528\u8005\u5e33\u865f\u7684\u7fa4\u7d44\u8b58\u5225\u78bc GID (group ID) \u5f88\u7279\u5225\uff0c\u56e0\u6b64\u53ef\u8b93 Rootkit \u5224\u65b7\u8a66\u5716\u7d93\u7531\u5b83\u9032\u5165\u7cfb\u7d71\u7684\u662f\u4e0d\u662f\u99ed\u5ba2\u672c\u4eba\u3002\u7531\u65bc Umbreon \u5df2\u6514\u622a\u4e86 <em>libc<\/em> \u51fd\u5f0f\u5eab\u5167\u7684\u51fd\u5f0f\uff0c\u56e0\u6b64\u7cfb\u7d71\u7ba1\u7406\u54e1\u7121\u6cd5\u5728 <em>\/etc\/passwd<\/em> \u6a94\u6848\u4e2d\u770b\u5230\u9019\u500b\u4f7f\u7528\u8005\u5e33\u865f\u3002\u4e0b\u5716\u986f\u793a\u900f\u904e SSH \u4f86\u5b58\u53d6\u6b64\u5f8c\u9580\u5e33\u865f\u6642\u6703\u770b\u5230\u7684\u756b\u9762\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/files\/2016\/08\/umbreon2tb.png\" width=\"210\" height=\"360\" \/><\/p>\n<p><em>\u5716 1\uff1aSSH \u767b\u5165\u756b\u9762\u3002<\/em><!--more--><\/p>\n<p><strong><em>Espeon \u5f8c\u9580\u5143\u4ef6<\/em><\/strong><\/p>\n<p>\u9019\u662f\u4e00\u500b\u4ee5<em> libpcap<\/em> \u7db2\u8def\u6d41\u91cf\u64f7\u53d6\u51fd\u5f0f\u5eab\u70ba\u57fa\u790e\u6240\u958b\u767c\u7684\u5f8c\u9580\u7a0b\u5f0f\uff0c\u63a1\u7528 C \u8a9e\u8a00\u64b0\u5beb\uff0c\u7576\u4f7f\u7528\u8005\u9023\u4e0a\u5b83\u4e26\u901a\u904e\u8a8d\u8b49\u4e4b\u5f8c\uff0c\u5c31\u6703\u9032\u5165\u4e00\u500b\u6307\u4ee4\u5217\u4ecb\u9762 (shell)\u3002(\u540c\u6a23\u5730\uff0cEspeon \u4e5f\u4e00\u96bb\u795e\u5947\u5bf6\u8c9d\u7684\u540d\u7a31\uff0c\u4e2d\u6587\u53eb\u300c\u592a\u967d\u7cbe\u9748\u300d)\u3002\u99ed\u5ba2\u53ef\u6307\u793a Espeon \u5efa\u7acb\u4e00\u500b\u5c0d\u5916\u9023\u7dda\u5230\u99ed\u5ba2\u7684\u96fb\u8166\uff0c\u5f62\u6210\u4e00\u7a2e\u53cd\u5411\u7684\u6307\u4ee4\u5217\u4ecb\u9762\uff0c\u5982\u6b64\u4fbf\u53ef\u7a7f\u900f\u9632\u706b\u7246\u7684\u963b\u64cb\u3002<\/p>\n<p>Espeon \u6703\u64f7\u53d6\u53d7\u5bb3\u96fb\u8166\u4e3b\u8981\u4e59\u592a\u7db2\u8def\u4ecb\u9762\u6240\u6536\u5230\u7684\u6240\u6709 TCP \u6d41\u91cf\u3002\u4e00\u65e6\u5b83\u6536\u5230\u542b\u6709\u7279\u5b9a\u6b04\u4f4d\u503c\u7684\u7279\u6b8a TCP \u5c01\u5305\u6642\uff0c\u5c31\u6703\u9023\u7dda\u81f3\u8a72 TCP \u5c01\u5305\u7684\u4f86\u6e90 IP \u4f4d\u5740\u3002\u4ee5\u4e0b\u662f Espeon \u6240\u76e3\u63a7\u7684\u6b04\u4f4d\u503c (16 \u9032\u4f4d)\uff1a<\/p>\n<ul>\n<li>SEQ (\u5e8f\u865f)\uff1a0xc4<\/li>\n<li>ACK (\u56de\u6388\u78bc)\uff1a0xc500<\/li>\n<li>IP ID (\u8b58\u5225\u78bc)\uff1a0x0fb1<\/li>\n<\/ul>\n<p>\u99ed\u5ba2\u6703\u5728\u5c01\u5305\u7684\u9019\u4e9b\u6b04\u4f4d\u7576\u4e2d\u8a2d\u597d\u5c0d\u61c9\u7684\u6578\u503c\uff0c\u7136\u5f8c\u5c07\u5c01\u5305\u767c\u9001\u81f3\u53d7\u5bb3\u7684\u96fb\u8166\u3002\u7576\u5f8c\u9580\u7a0b\u5f0f\u767c\u73fe\u6b04\u4f4d\u6578\u503c\u543b\u5408\u7684\u5c01\u5305\u6642\uff0c\u5c31\u6703\u5efa\u7acb\u9023\u7dda\u81f3\u8a72\u5c01\u5305\u7684\u4f86\u6e90 IP \u4f4d\u5740\u3002\u4ee5\u4e0b\u662f <em>got_packet()<\/em> \u51fd\u5f0f\u89e3\u8b6f\u5f8c\u7684\u7a0b\u5f0f\u78bc\uff0c\u5716\u4e2d\u986f\u793a\u7684\u6b63\u662f\u9019\u6bb5\u6578\u503c\u6bd4\u8f03\u7684\u52d5\u4f5c\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/files\/2016\/08\/umbreon3tb.png\" width=\"315\" height=\"360\" \/><\/p>\n<p><em>\u5716 2\uff1a\u7a0b\u5f0f\u78bc\u7bc4\u4f8b\u3002<\/em><\/p>\n<p><strong><em>\u96b1\u85cf\u9810\u5148\u8f09\u5165\u7684\u8a2d\u5b9a\u6a94\u4ee5\u9632\u6b62\u7cfb\u7d71\u547c\u53eb\u88ab\u8ffd\u8e64<\/em><\/strong><\/p>\n<p>\u7cfb\u7d71\u547c\u53eb\u8ffd\u8e64 (syscall trace) \u662f <em>strace<\/em> \u9019\u500b Linux \u71b1\u9580\u6307\u4ee4\u5217\u5de5\u5177\u6240\u7528\u7684\u4e00\u7a2e\u6280\u5de7\u3002\u8a72\u7a0b\u5f0f\u6703\u900f\u904e <em>ptrace()<\/em> \u7cfb\u7d71\u547c\u53eb\u4f86\u6aa2\u67e5\u67d0\u57f7\u884c\u6a94\u6848\u6240\u505a\u7684\u7cfb\u7d71\u547c\u53eb\u4e4b\u53c3\u6578\u8207\u56de\u50b3\u503c\u3002\u7531\u65bc Umbreon \u5229\u7528\u4e86\u4e00\u500b\u540d\u70ba\u300c<em>\/etc\/ld.so.&lt;random&gt;<\/em>\u300d\u7684\u6a94\u6848\u4f86\u6307\u793a\u7cfb\u7d71\u7684\u7a0b\u5f0f\u8f09\u5165\u5668\u5728\u8f09\u5165\u5176\u4ed6 ELF \u51fd\u5f0f\u5eab\u4e4b\u524d\u5148\u5c07\u5b83\u8f09\u5165\uff0c\u56e0\u6b64\u5b83\u80fd\u5920\u6514\u622a <em>vprintf()<\/em>\u3001<em>__vfprintf_chk() <\/em>\u00a0\u548c <em>fputs_unlocked() <\/em>\u7b49\u51fd\u5f0f\u4f86\u8b93\u4f7f\u7528<em> strace <\/em>\u7684\u7cfb\u7d71\u7ba1\u7406\u54e1\u770b\u4e0d\u5230\u5b83\u7684\u8cc7\u6599\uff0c\u56e0\u70ba\u5404\u5bb6\u7cfb\u7d71\u4e0a\u7684 <em>strace\u00a0<\/em> \u90fd\u662f\u4f7f\u7528\u9019\u4e9b\u51fd\u5f0f\u4f86\u5c07\u7d50\u679c\u8f38\u51fa\u5230\u67d0\u500b\u6a94\u6848\u3002\u4e0b\u5716\u986f\u793a \u00a0<em>strace.so<\/em> \u5143\u4ef6\u4e2d\u7684 <em>vprintf()<\/em> \u7a0b\u5f0f\u78bc\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/files\/2016\/08\/umbreon4tb.png\" width=\"321\" height=\"360\" \/><\/p>\n<p><em>\u5716 3\uff1a\u7a0b\u5f0f\u78bc\u7bc4\u4f8b\u3002<\/em><\/p>\n<p><em>wrapper_200da0_6b0<\/em> \u6700\u5f8c\u6703\u547c\u53eb <em>strstr()<\/em> \u51fd\u5f0f\u3002\u6b64\u8655\u7cfb\u7d71\u9810\u5148\u8f09\u5165\u7684\u6a94\u6848\u662f\u300c<em>\/etc\/ld.so.NfitFd2<\/em>\u300d (Rootkit \u7684\u7248\u672c)\uff0c\u6240\u4ee5\u4efb\u4f55\u50b3\u5165 <em>vprintf()<\/em> \u51fd\u5f0f\u7684\u8cc7\u6599\u7576\u4e2d\u82e5\u5305\u542b\u9019\u4e32\u6587\u5b57\uff0c\u90fd\u6703\u88ab\u66ff\u63db\u6210\u300c<em>\/etc\/ld.so.preload<\/em>\u300d(\u6b63\u5e38\u7248\u672c)<em>\u3002<\/em>\u56e0\u6b64\uff0c\u5206\u6790\u4eba\u54e1\u6703\u4ee5\u70ba\u7a0b\u5f0f\u8f09\u5165\u7684\u6a94\u6848\u662f\u5f8c\u8005\uff0c\u56e0\u6b64\u770b\u4e0d\u51fa\u7570\u6a23\u3002\u4e0b\u5716\u986f\u793a\u6b64\u51fd\u5f0f\u770b\u5230\u7684\u5b57\u4e32\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone\" src=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/files\/2016\/08\/umbreon5.png\" width=\"520\" height=\"329\" \/><\/p>\n<p><em>\u5716 4\uff1a\u7a0b\u5f0f\u78bc\u7bc4\u4f8b\u3002<\/em><\/p>\n<p>\u6b64\u5143\u4ef6\u9084\u6703\u4fee\u6539 <em>LD_PRELOAD<\/em> \u74b0\u5883\u8b8a\u6578\uff0c\u8b93\u8cc7\u5b89\u5206\u6790\u4eba\u54e1\u7121\u6cd5\u6514\u622a\u60e1\u610f\u7684\u51fd\u5f0f\u3002<\/p>\n<p><strong><em>\u96b1\u85cf\u5c01\u5305<\/em><\/strong><\/p>\n<p>\u9664\u6b64\u4e4b\u5916\uff0cUmbreon \u9084\u6703\u6514\u622a <em>libpcap<\/em> \u51fd\u5f0f\u5eab\u7576\u4e2d\u7684 <em>got_packet()<\/em> \u548c <em>pcap_loop()<\/em> \u5169\u500b\u51fd\u5f0f\uff0c\u8b93\u9019\u4e9b\u51fd\u5f0f\u5728\u9047\u5230\u9023\u63a5\u57e0\u4f4d\u65bc\u5176\u8a2d\u5b9a\u6a94\u6307\u5b9a\u7bc4\u570d\u5167\u7684\u5c01\u5305\u6642\uff0c\u4e0d\u8981\u50b3\u56de\u4efb\u4f55 TCP \u5c01\u5305\u8cc7\u8a0a\u3002\u5982\u6b64\u4e00\u4f86\uff0c\u7576\u8cc7\u5b89\u5206\u6790\u4eba\u54e1\u5728\u53d7\u5bb3\u7684\u96fb\u8166\u4e0a\u4f7f\u7528 <em>tcpdump<\/em> \u9019\u985e\u7db2\u8def\u6d41\u91cf\u64f7\u53d6\u5de5\u5177\u6642\uff0c\u6839\u672c\u7121\u6cd5\u770b\u5230\u5f8c\u9580\u7a0b\u5f0f\u7684\u6d41\u91cf\u3002<\/p>\n<p><strong><em>Umbreon \u7a0b\u5f0f\u7684\u5be6\u4f5c<\/em><\/strong><\/p>\n<p>Umbreon \u57fa\u672c\u4e0a\u626e\u6f14\u4e86\u985e\u4f3c <em>glibc<\/em> (GNU C \u51fd\u5f0f\u5eab) \u7684\u89d2\u8272\u3002\u5b83\u6703\u5728\u7cfb\u7d71\u7522\u751f\u4e00\u500b\u53eb\u505a\u300c<em>\/etc\/ld.so.&lt;random&gt;<\/em>\u300d\u7684\u6a94\u6848\uff0c\u6839\u64da <a href=\"https:\/\/man7.org\/linux\/man-pages\/man8\/ld.so.8.html\">Linux \u7cfb\u7d71\u8aaa\u660e\u6587\u4ef6<\/a>\uff0c\u8a72\u6a94\u6848\u7684\u529f\u80fd\u5982\u4e0b\uff1a<\/p>\n<p><em>\/etc\/ld.so.preload<\/em>\u00a0\u00a0\u00a0\u00a0 \u6a94\u6848\u5167\u542b\u4e00\u500b\u4ee5\u7a7a\u767d\u5206\u9694\u7684\u6e05\u55ae\uff0c\u8a18\u8f09\u8457\u8981\u5728\u7a0b\u5f0f\u4e4b\u524d\u9810\u5148\u8f09\u5165\u7684 ELF \u5171\u7528\u7269\u4ef6\u3002<\/p>\n<p>\u539f\u672c\uff0cELF \u8f09\u5165\u5668\u8981\u8f09\u5165\u7684\u6a94\u6848\u61c9\u8a72\u662f\u300c<em>\/etc\/ld.so.preload<\/em>\u300d\u3002\u4f46 Umbreon \u4e5f\u6703\u4fee\u6539\u8f09\u5165\u5668\u7684\u51fd\u5f0f\u5eab (\u5982\uff1a\u300c<em>\/lib\/x86_64-linux-gnu\/ld-2.19.so<\/em>\u300d\u5373\u662f\u5176\u4e2d\u4e4b\u4e00)\uff0c\u8b93\u5b83\u8f09\u5165\u300c<em>\/etc\/ld.so.&lt;random&gt;<\/em>\u300d\u6a94\u6848\uff0c<em>&lt;random&gt;<\/em> \u90e8\u5206\u662f\u4e00\u4e32 7 \u500b\u5b57\u5143\u7684\u4e82\u6578\uff0c\u8207\u300cpreload\u300d\u7684\u9577\u5ea6\u76f8\u540c\u3002<\/p>\n<p>\u6b64\u6a94\u6848\u7576\u4e2d\u6240\u5217\u7684\u6bcf\u500b\u51fd\u5f0f\u5eab\uff0c\u90fd\u6703\u5728\u4efb\u4f55\u5176\u4ed6 ELF \u7a0b\u5f0f\u555f\u52d5\u4e4b\u524d\u9810\u5148\u8f09\u5165\u7cfb\u7d71\u3002\u56e0\u6b64 Umbreon\u624d\u6703\u5c07\u5b83\u81ea\u5df1\u7684\u4e3b\u51fd\u5f0f\u5eab\u5217\u5728\u8a72\u6a94\u6848\u5167\uff0c\u800c\u51fd\u5f0f\u5eab\u5167\u5373\u542b\u6709\u8207<em> glibc<\/em>\u00a0 \u5167\u7684\u51fd\u5f0f\u540d\u7a31\u76f8\u540c\u7684\u51fd\u5f0f\u3002Umbreon\u7684\u4e3b\u51fd\u5f0f\u5eab\u4f4d\u65bc\u4e0b\u5217\u8def\u5f91\uff1a<\/p>\n<ul>\n<li>\/usr\/share\/libc.so.&lt;random&gt;.${PLATFORM}.ld-2.22.so<\/li>\n<\/ul>\n<p>${PLATFORM} \u90e8\u5206\u96a8\u7cfb\u7d71\u7684\u67b6\u69cb\u800c\u7570\uff0c\u6709\u4e0b\u5217\u5e7e\u7a2e\u53ef\u80fd\uff1a<\/p>\n<ul>\n<li>\/usr\/share\/libc.so.&lt;random&gt;.<strong>v6l.ld<\/strong>-2.22.so (ARM)<\/li>\n<li>\/usr\/share\/libc.so.&lt;random&gt;.<strong>x86_64<\/strong>.ld-2.22.so (x86-64)<\/li>\n<li>\/usr\/share\/libc.so.&lt;random&gt;.<strong>i686<\/strong>.ld-2.22.so \u00a0 (x86)<\/li>\n<\/ul>\n<p>\u4e0d\u904e\uff0c\u7531\u65bc Umbreon \u662f\u900f\u904e\u624b\u52d5\u65b9\u5f0f\u5b89\u88dd\u5230\u76ee\u6a19\u96fb\u8166\u4e0a\uff0c\u56e0\u6b64\u5176\u8def\u5f91\u4e5f\u6709\u53ef\u80fd\u8207\u4e0a\u8ff0\u4e0d\u540c\u3002Umbreon \u4e3b\u51fd\u5f0f\u5eab\u7576\u4e2d\u5be6\u4f5c\u7684\u51fd\u5f0f\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>__fxstat<\/li>\n<li>__fxstat64<\/li>\n<li>__lxstat<\/li>\n<li>__lxstat64<\/li>\n<li>__syslog_chk<\/li>\n<li>__xstat<\/li>\n<li>__xstat64<\/li>\n<li>access<\/li>\n<li>audit_log_acct_message<\/li>\n<li>audit_log_user_message<\/li>\n<li>audit_send<\/li>\n<li>chdir<\/li>\n<li>check_and_fix_ldso<\/li>\n<li>checkpw<\/li>\n<li>chmod<\/li>\n<li>chown<\/li>\n<li>cleanup<\/li>\n<li>dlinfo<\/li>\n<li>dlsym<\/li>\n<li>esh<\/li>\n<li>execve<\/li>\n<li>execvp<\/li>\n<li>fake_preload_fail<\/li>\n<li>fchmod<\/li>\n<li>fchown<\/li>\n<li>fchownat<\/li>\n<li>fdopendir<\/li>\n<li>filesize<\/li>\n<li>find_dlsym<\/li>\n<li>find_sym<\/li>\n<li>fopen<\/li>\n<li>fopen64<\/li>\n<li>fstat<\/li>\n<li>fstat64<\/li>\n<li>get_hideports<\/li>\n<li>get_my_procname<\/li>\n<li>get_procname<\/li>\n<li>getpath<\/li>\n<li>getpgid<\/li>\n<li>getpriority<\/li>\n<li>getpwnam<\/li>\n<li>getpwnam_r<\/li>\n<li>getpwuid<\/li>\n<li>getsid<\/li>\n<li>getspnam<\/li>\n<li>is_dynamic<\/li>\n<li>is_hideport<\/li>\n<li>is_ldso32<\/li>\n<li>is_ldso64<\/li>\n<li>is_really<\/li>\n<li>kill<\/li>\n<li>lchown<\/li>\n<li>link<\/li>\n<li>login<\/li>\n<li>lstat<\/li>\n<li>lstat64<\/li>\n<li>netstat<\/li>\n<li>open<\/li>\n<li>open64<\/li>\n<li>openat<\/li>\n<li>opendir<\/li>\n<li>pam_acct_mgmt<\/li>\n<li>pam_authenticate<\/li>\n<li>pam_open_session<\/li>\n<li>pam_prompt<\/li>\n<li>pam_vprompt<\/li>\n<li>pcap_loop<\/li>\n<li>procstatus<\/li>\n<li>procstatus_o<\/li>\n<li>pututline<\/li>\n<li>pututxline<\/li>\n<li>rclocal<\/li>\n<li>read<\/li>\n<li>readdir<\/li>\n<li>readdir64<\/li>\n<li>readlink<\/li>\n<li>recover_dirname<\/li>\n<li>recover_filename<\/li>\n<li>reinstall_self<\/li>\n<li>rename<\/li>\n<li>rmdir<\/li>\n<li>sched_getaffinity<\/li>\n<li>sched_getparam<\/li>\n<li>sched_getscheduler<\/li>\n<li>sched_rr_get_interval<\/li>\n<li>setgid<\/li>\n<li>setregid<\/li>\n<li>setresgid<\/li>\n<li>socket<\/li>\n<li>spoof_maps<\/li>\n<li>spoof_smaps<\/li>\n<li>stat<\/li>\n<li>stat64<\/li>\n<li>sxor<\/li>\n<li>symlink<\/li>\n<li>sysinfo<\/li>\n<li>syslog<\/li>\n<li>unfuck_linkmap<\/li>\n<li>unlink<\/li>\n<li>unlinkat<\/li>\n<li>write<\/li>\n<\/ul>\n<p>\u4e0a\u8ff0\u51fd\u5f0f\u7576\u4e2d\u6709\u8a31\u591a\u90fd\u662f <em>libc<\/em> \u5167\u51fa\u73fe\u7684\u51fd\u5f0f\u3002\u7576\u67d0\u500b\u57f7\u884c\u6a94\u555f\u52d5\u6642\uff0c\u7531\u65bc Umbreon \u7684\u51fd\u5f0f\u5eab\u7684\u8f09\u5165\u9806\u5e8f\u6703\u6bd4\u4efb\u4f55\u5176\u4ed6\u4f7f\u7528\u8005\u51fd\u5f0f\u5eab\u66f4\u65e9\uff0c\u56e0\u6b64\u7a0b\u5f0f\u8f09\u5165\u5668\u6703\u5c07\u9019\u4e9b\u51fd\u5f0f\u5c0d\u61c9\u5230 Umbreon \u51fd\u5f0f\u5eab\u4e2d\u7684\u51fd\u5f0f\uff0c\u800c\u975e \u00a0<em>libc<\/em> \u7576\u4e2d\u7684\u51fd\u5f0f\u3002\u85c9\u7531\u9019\u6a23\u7684\u65b9\u5f0f\uff0cUmbreon \u5c31\u80fd\u81ea\u7136\u800c\u7136\u8b93\u57f7\u884c\u6a94\u547c\u53eb\u5176\u60e1\u610f\u7684\u51fd\u5f0f\u800c\u4e0d\u81ea\u77e5\u3002<\/p>\n<p>\u4f46\u9019\u4e9b\u60e1\u610f\u51fd\u5f0f\u53ea\u662f\u7a7a\u6bbc\uff0c\u7576\u7a0b\u5f0f\u547c\u53eb\u5b83\u5011\u6642\uff0c\u5b83\u5011\u6703\u5148\u6aa2\u67e5\u7a0b\u5f0f\u50b3\u4f86\u7684\u53c3\u6578\u8cc7\u6599\uff0c\u7136\u5f8c\u518d\u547c\u53eb\u7cfb\u7d71\u51fd\u5f0f\u5eab\u4e2d\u771f\u6b63\u505a\u4e8b\u7684\u51fd\u5f0f\u3002\u540c\u6a23\u5730\uff0c\u6bcf\u500b\u7cfb\u7d71\u6307\u4ee4\u7684\u8f38\u51fa\u7d50\u679c\u90fd\u53ef\u80fd\u5df2\u906d\u5230\u9019\u4e9b\u51fd\u5f0f\u4fee\u6539\u4e4b\u5f8c\u624d\u986f\u793a\u5728\u4f7f\u7528\u8005\u9762\u524d\u3002\u57fa\u672c\u4e0a\uff0c\u9019\u985e\u4f3c\u6240\u8b02\u7684\u300c\u4e2d\u9593\u4eba\u653b\u64ca\u300d\uff0c\u7cfb\u7d71\u51fd\u5f0f\u7684\u8f38\u5165\u548c\u8f38\u51fa\u4e8b\u5be6\u4e0a\u90fd\u6703\u906d\u5230\u7ac4\u6539\u3002\u6240\u4ee5\uff0c\u4f7f\u7528\u8005\u4e0d\u80fd\u76f8\u4fe1\u67d0\u4e9b\u7cfb\u7d71\u6307\u4ee4\u6240\u8f38\u51fa\u7684\u5167\u5bb9\uff0c\u4f8b\u5982\uff1a<em>ps\u3001ls\u3001top <\/em>\u8207 <em>pstree \u00a0<\/em>\u7b49\u7b49\u3002\u56e0\u70ba\u9019\u4e9b\u6307\u4ee4\u90fd\u7528\u5230\u4e86 <em>libc<\/em> \u7576\u4e2d\u7684\u51fd\u5f0f\uff0c\u6240\u6709\u8f38\u51fa\u7d50\u679c\u90fd\u5df2\u906d\u7ac4\u6539\u3002<\/p>\n<p><strong><em>\u5982\u4f55\u5075\u6e2c Umbreon<\/em><\/strong><\/p>\n<p>Linux \u7cfb\u7d71\u7576\u4e2d\u7d55\u5927\u591a\u6578\u7684\u5de5\u5177\u90fd\u662f\u7528 C \u8a9e\u8a00\u64b0\u5beb\u3002\u751a\u81f3\u4e00\u4e9b\u4f7f\u7528 Perl\u3001Python\u3001Ruby\u3001PHP \u548c\u5176\u4ed6\u8173\u672c\u8a9e\u8a00\u6240\u64b0\u5beb\u7684\u7a0b\u5f0f\uff0c\u6700\u5f8c\u9084\u662f\u547c\u53eb\u7d93\u904e\u5305\u88dd\u7684 GNU C \u51fd\u5f0f\uff0c\u56e0\u70ba\u9019\u4e9b\u8173\u672c\u8a9e\u8a00\u7684\u89e3\u8b6f\u5668\u4e5f\u662f\u7528 C \u8a9e\u8a00\u64b0\u5beb\u3002\u6b63\u56e0\u70ba Umbreon \u7684\u51fd\u5f0f\u5eab\u6703\u6514\u622a <em>libc<\/em> \u7684\u51fd\u5f0f\uff0c\u56e0\u6b64\uff0c\u8981\u88fd\u4f5c\u4e00\u500b\u80fd\u5920\u5075\u6e2c Umbreon \u7684\u53ef\u9760\u5de5\u5177\uff0c\u5c31\u4e0d\u80fd\u7528\u5230 \u00a0<em>libc<\/em> \u51fd\u5f0f\u5eab\u3002<\/p>\n<p>\u6709\u4e00\u500b\u65b9\u6cd5\u53ef\u4ee5\u5beb\u51fa\u53ef\u5217\u51fa Umbreon Rootkit \u9810\u8a2d\u76ee\u9304\u5167\u5bb9\u7684\u5c0f\u5de5\u5177\uff0c\u90a3\u5c31\u662f\u76f4\u63a5\u4f7f\u7528 \u00a0Linux \u6838\u5fc3\u7684\u7cfb\u7d71\u547c\u53eb\u3002\u9019\u6a23\u5c31\u80fd\u907f\u958b Umbreon \u5728\u7cfb\u7d71\u4e0a\u5b89\u88dd\u7684\u4efb\u4f55 C \u51fd\u5f0f\u5eab\u3002\u4e00\u65e6\u8a72\u5de5\u5177\u5217\u51fa\u4efb\u4f55\u4ee5\u300c<em>libc.so<\/em>\u00a0\u300d\u5b57\u6a23\u958b\u982d\u7136\u5f8c\u8ddf\u8457\u4e00\u4e32\u96a8\u6a5f\u6574\u6578\u5b57\u4e32\u7d50\u5c3e\u7684\u6a94\u6848\u540d\u7a31\uff0c\u90a3\u5c31\u662f\u7cfb\u7d71\u53ef\u80fd\u611f\u67d3 Umbreon \u7684\u5fb5\u5146\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u6211\u5011\u4e5f\u5efa\u7acb\u4e86\u4e00\u7d44 YARA \u898f\u5247\u4f86\u5075\u6e2c Umbreon\uff0c\u8acb\u81f3<a href=\"https:\/\/documents.trendmicro.com\/assets\/20160905-umbreon-yara.txt\">\u9019\u88e1\u4e0b\u8f09<\/a>\u3002<\/p>\n<p><strong><em>Rootkit \u6e05\u9664\u6b65\u9a5f<\/em><\/strong><\/p>\n<p>Umbreon \u662f\u4e00\u500b Ring 3 (\u4f7f\u7528\u8005\u5c64\u7d1a) \u7684 Rootkit\uff0c\u56e0\u6b64\u662f\u6709\u8fa6\u6cd5\u53ef\u4ee5\u6e05\u9664\u7684\u3002\u4e0d\u904e\u9084\u662f\u6709\u9ede\u9ebb\u7169\uff0c\u800c\u4e14\u7d93\u9a57\u4e0d\u8db3\u7684\u4f7f\u7528\u8005\u53ef\u80fd\u6703\u4e0d\u5c0f\u5fc3\u6bc0\u4e86\u7cfb\u7d71\uff0c\u8b93\u7cfb\u7d71\u7121\u6cd5\u5fa9\u539f\u3002\u82e5\u60a8\u6709\u8db3\u5920\u7684\u52c7\u6c23\u60f3\u8a66\u8a66\u770b\u7684\u8a71\uff0c\u6700\u7c21\u55ae\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 Linux LiveCD \u4f86\u91cd\u65b0\u958b\u6a5f\uff0c\u7136\u5f8c\u4f9d\u7167\u4e0b\u5217\u6b65\u9a5f\u57f7\u884c\uff1a<\/p>\n<ol>\n<li>\u639b\u8f09 <em>\/usr<\/em> \u76ee\u9304\u6240\u5728\u7684\u786c\u789f\u5206\u5272 (\u9700\u8981\u5beb\u5165\u6b0a\u9650)\u3002<\/li>\n<li>\u5728\u9032\u884c\u4efb\u4f55\u8b8a\u66f4\u4e4b\u524d\uff0c\u5148\u5099\u4efd\u6240\u6709\u6a94\u6848\u3002<\/li>\n<li>\u79fb\u9664\u300c<em>\/etc\/ld.so.&lt;random&gt;<\/em>\u300d\u6a94\u6848\u3002<\/li>\n<li>\u79fb\u9664\u300c<em>\/usr\/lib\/libc.so.&lt;random&gt;<\/em>\u300d\u76ee\u9304\u3002<\/li>\n<li>\u5fa9\u539f\u6240\u6709\u300c<em>\/usr\/share\/libc.so.&lt;random&gt;.&lt;arch&gt;.*.so<\/em> \u6a94\u6848\u7684\u5c6c\u6027\uff0c\u7136\u5f8c\u5c07\u5b83\u5011\u4e5f\u5168\u6578\u79fb\u9664\u3002<\/li>\n<li>\u4fee\u6b63\u7a0b\u5f0f\u8f09\u5165\u5668\u4f7f\u7528\u7684\u51fd\u5f0f\u5eab\uff0c\u6062\u5fa9\u6210\u539f\u4f86\u4f7f\u7528\u7684<em>\/etc\/ld.so.preload<\/em>\u3002<\/li>\n<li>\u5378\u8f09\u786c\u789f\u5206\u5272\uff0c\u7136\u5f8c\u5c07\u7cfb\u7d71\u6b63\u5e38\u91cd\u65b0\u958b\u6a5f\u3002<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u771f\u5be6\u7684\u6e05\u9664\u6b65\u9a5f\u7bc4\u4f8b (\u8acb\u6ce8\u610f\uff0c\u6a94\u6848\u540d\u7a31\u4e0d\u4e00\u5b9a\u548c\u60a8\u770b\u5230\u7684\u76f8\u540c\uff0c\u56e0\u70ba\u9019\u4e9b\u4e82\u6578\u78bc\u662f\u60e1\u610f\u7a0b\u5f0f\u7522\u751f\u7684)\u3002\u5728\u4e0b\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c<em>\/dev\/sda1<\/em> \u662f <em>\/usr<\/em> \u76ee\u9304\u6240\u5728\u7684\u78c1\u789f\u5206\u5272\u3002<\/p>\n<p># mount \/dev\/sda1 \/mnt<br \/>\n# rm -f \/mnt\/etc\/ld.so.khVrkEQ<br \/>\n# rm -rf \/mnt\/usr\/lib\/libc.so.41762810374176281037\/<br \/>\n# chattr -ai \/mnt\/usr\/share\/libc.so.4176281037.*<br \/>\n# rm -f \/mnt\/usr\/share\/libc.so.4176281037.*<br \/>\n# sed -i &#8216;s:\/etc\/ld\\.so\\.khVrkEQ:\/etc\/ld.so.preload:&#8217; \/lib\/x86_64-linux-gnu\/ld-2.19.so<br \/>\n# umount \/mnt<br \/>\n# reboot<\/p>\n<p>\u5728\u6b64\u7bc4\u4f8b\u4e2d\uff0c\u4f7f\u7528 <em>chattr<\/em> \u6307\u4ee4\u662f\u5fc5\u8981\u7684\u6b65\u9a5f\uff0c\u56e0\u70ba Umbreon \u51fd\u5f0f\u5eab\u7684\u6a94\u6848\u5c6c\u6027\u8a2d\u5b9a\u4e86\u300ca\u300d(\u53ea\u80fd\u8ffd\u52a0) \u548c\u300ci\u300d(\u4e0d\u53ef\u4fee\u6539) \u5c6c\u6027\u3002<\/p>\n<p><strong><em>\u5165\u4fb5\u6307\u6a19\u8cc7\u6599<\/em><\/strong><\/p>\n<p>\u4ee5\u4e0b\u662f\u8207\u6b64\u5a01\u8105\u76f8\u95dc\u7684\u6a94\u6848\u6a23\u672c\uff1a<\/p>\n<ul>\n<li>b5e68f8e23115bdbe868d19d09c90eb535184acd \u2014 \/.bashrc<\/li>\n<li>73ddcd21bf05a9edc7c85d1efd5304eea039d3cb \u2014 \/bin\/pkg<\/li>\n<li>48a6e43af0cb40d4f92b38062012117081b6774e \u2014 \/bin\/espeon-shell (detected as\u00a0BKDR_UMREON.A)<\/li>\n<li>88aea4bb5e68c1afe1fb11d55a190dddb8b1586f \u2014\/bin\/unhide-self<\/li>\n<li>73ddcd21bf05a9edc7c85d1efd5304eea039d3cb \u2014 \/bin\/zypper and\u00a0.\/bin\/emerge<\/li>\n<li>42802085c28c0712ac0679c100886be3bcf07341 \u2014 \/bin\/umbreon.py<\/li>\n<li>66d246e02492821f7e5bbaeb8156ece44c101bbc \u2014 \/bin\/espeon (detected as\u00a0ELF_UMREON.A)<\/li>\n<li>73ddcd21bf05a9edc7c85d1efd5304eea039d3cb \u2014\/bin\/yum<\/li>\n<li>4f6c6d42bdf93f4ccf68d888ce7f98bcd929fc72 \u2014 \/bin\/spytty<\/li>\n<li>73ddcd21bf05a9edc7c85d1efd5304eea039d3cb \u2014 \/bin\/apt-get<\/li>\n<li>1f1ab0a8e9ec43d154cd7ab39bfaaa1eada4ad5e \u2014 \/bin\/.x<\/li>\n<li>81ad3260c0fc38a3b0f65687f7c606cb66c525a8 \u2014 \/.init-append<\/li>\n<li>7b10bf8187100cdc2e1d59536c19454b0c0da46f \u2014 \/.umbreon-ascii<\/li>\n<li>96d5e513b6900e23b18149a516fb7e1425334a44 \u2014\u00a0\/.profile<\/li>\n<li>851b7f07736be6789cbcc617efd6dcb682e0ce54 \u2014\u00a0\/usr\/share\/libc.so.2284441204.i686.ld-2.22.so\u00a0(detected as\u00a0ELF_UMREON.A)<\/li>\n<li>e2bc8945f0d7ca8986b4223ed9ba13686a798446 \u2014\u00a0\/usr\/share\/libc.so.2284441204.x86_64.ld-2.22.so\u00a0(detected as\u00a0ELF_UMREON.A)<\/li>\n<li>17b42374795295f776536b86aa571a721b041c38 \u2014 \/.ldso\/strace.so (detected as\u00a0ELF_UMREON.A)<\/li>\n<li>394fae7d40b0c54c16d7ff3c3ff0d247409bd28f \u2014\/promptlog<\/li>\n<li>738ac5f6a443f925b3198143488365c5edf73679 \u2014\/hideports<\/li>\n<li>022be09c68a410f6bed15c98b63e15bb57e920a9 \u2014 espeon (ARM version, detected as ELF_UMREON.B)<\/li>\n<li>3762c537801c21f68f9eac858ecc8d436927c77a \u2014 pkg (ARM version, detected as ELF_UMREON.B)<\/li>\n<li>2cd24c5701a7af76ab6673502c80109b6ce650c6 \u2014 strace.so (ARM version, detected as ELF_UMREON.B)<\/li>\n<li>358afd4bd02de3ce1db43970de5e4cb0c38c2848 \u2014 umbreon.so (ARM version, detected as ELF_UMREON.B)\u539f\u6587\u51fa\u8655\uff1a <a href=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/pokemon-themed-umbreon-linux-rootkit-hits-x86-arm-systems\/\">Pok\u00e9mon-themed Umbreon Linux Rootkit Hits x86, ARM Systems<\/a> \u4f5c\u8005\uff1a<a href=\"https:\/\/blog.trendmicro.com\/trendlabs-security-intelligence\/author\/fernandomerces\/\">Fernando Merc\u00eas (\u8cc7\u6df1\u5a01\u8105\u7814\u7a76\u54e1)<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee5\u795e\u5947\u5bf6\u8c9d\u6708\u7cbe\u9748\u70ba\u540d\u7684 Umbreon Rootkit , \u653b\u64ca x86 \u548c ARM \u8655\u7406\u5668\u7684 Linux \u7cfb [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":28848,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_wpscppro_dont_share_socialmedia":false,"_wpscppro_custom_social_share_image":0,"_facebook_share_type":"","_twitter_share_type":"","_linkedin_share_type":"","_pinterest_share_type":"","_linkedin_share_type_page":"","_instagram_share_type":"","_medium_share_type":"","_threads_share_type":"","_google_business_share_type":"","_selected_social_profile":[],"_wpsp_enable_custom_social_template":false,"_wpsp_social_scheduling":{"enabled":false,"datetime":null,"platforms":[],"status":"template_only","dateOption":"today","timeOption":"now","customDays":"","customHours":"","customDate":"","customTime":"","schedulingType":"absolute"},"_wpsp_active_default_template":true},"categories":[2679,2859,820,369],"tags":[2690,1759,2860,2862,1380,2861,2689,2810,2807],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/28846"}],"collection":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=28846"}],"version-history":[{"count":0,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/posts\/28846\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=\/wp\/v2\/media\/28848"}],"wp:attachment":[{"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=28846"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=28846"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.trendmicro.com.tw\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=28846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}