{"id":122916,"date":"2022-05-08T23:18:46","date_gmt":"2022-05-09T06:18:46","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=122916"},"modified":"2025-08-25T04:20:03","modified_gmt":"2025-08-25T11:20:03","slug":"cobalt-strike-metadata-encoding-decoding","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/cobalt-strike-metadata-encoding-decoding\/","title":{"rendered":"Cobalt Strike\u89e3\u6790&#038;\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: Cobalt Strike\u306b\u3088\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9"},"content":{"rendered":"<h2><a id=\"post-122916-_4lt92rr5muov\"><\/a><strong>\u6982\u8981<\/strong><\/h2>\n<p>Cobalt Strike\u306f\u5546\u7528\u306e\u8105\u5a01\u30a8\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u9577\u671f\u7684\u306b\u3072\u305d\u3080\u30a2\u30af\u30bf\u30fc\u3092\u30a8\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u307e\u3059\u3002Beacon\u3068\u547c\u3070\u308c\u308b\u3053\u306e\u30a2\u30af\u30bf\u30fc\u306f\u5916\u90e8\u30c1\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\u3068\u901a\u4fe1\u3057\u3066\u30b3\u30de\u30f3\u30c9\uff06\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb(C2)\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u6a21\u5023\u3057\u307e\u3059\u3002\u6c4e\u7528\u6027\u304c\u9ad8\u304f\u3001\u30ec\u30c3\u30c9\u30c1\u30fc\u30e0\u306e\u6b63\u898f\u30c4\u30fc\u30eb\u3068\u3057\u3066\u3088\u304f\u5229\u7528\u3055\u308c\u307e\u3059\u304c\u3001\u8105\u5a01\u30a2\u30af\u30bf\u30fc\u306e\u5b9f\u969b\u306e\u653b\u6483\u3067\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u6c4e\u7528\u6027\u306e\u9ad8\u3055\u306fCobalt Strike \u306b\u305d\u306a\u308f\u308b\u591a\u304f\u306e\u6a5f\u80fd\u306b\u8d77\u56e0\u3057\u3066\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070C2\u30b5\u30fc\u30d0\u30fc\u3078\u9001\u4fe1\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u96e3\u8aad\u5316\u3059\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u7528\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306a\u3069\u304c\u305d\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<p>\u524d\u56de\u306e\u30d6\u30ed\u30b0\u300c<a href=\"https:\/\/unit42.paloaltonetworks.jp\/cobalt-strike-malleable-c2-profile\/\">Cobalt Strike\u89e3\u6790&amp;\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: Malleable C2\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067Cobalt Strike\u691c\u51fa\u304c\u96e3\u3057\u304f\u306a\u308b\u7406\u7531<\/a>\u300d\u3067\u3001\u653b\u6483\u8005\u307e\u305f\u306f\u30ec\u30c3\u30c9 \u30c1\u30fc\u30e0\u304c HTTP \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3001Malleable C2 \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u30e1\u30bf\u30c7\u30fc\u30bf \u30a8\u30f3\u30b3\u30fc\u30c9 \u30a4\u30f3\u30b8\u30b1\u30fc\u30bf\u30fc\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3053\u3068\u3092\u5b66\u3073\u307e\u3057\u305f\u3002Cobalt Strike Beacon\u306f\u3001Phone Home\u901a\u4fe1 (C2\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u9023\u7d61\u901a\u4fe1)\u6642\u306b\u3001\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u60c5\u5831\u3067\u3042\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092Cobalt Strike TeamServer\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002\u30ec\u30c3\u30c9\u30c1\u30fc\u30e0\u3084\u653b\u6483\u8005\u306f\u3001\u3053\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u3069\u306e\u3088\u3046\u306b\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u3001HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3067\u9001\u4fe1\u3057\u3001C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u3092\u7d42\u4e86\u3055\u305b\u308b\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u7a3f\u306f\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3001Cobalt Strike\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u4f7f\u7528\u3055\u308c\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u30bf\u30a4\u30d7\u306e\u5b9a\u7fa9\u3068\u9055\u3044\u3001\u5b9f\u969b\u306b\u89b3\u6e2c\u3055\u308c\u3066\u3044\u308b\u60aa\u610f\u306e\u3042\u308b\u653b\u6483\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u89e3\u8aac\u3067\u306fC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u4e2d\u306b\u30a8\u30f3\u30b3\u30fc\u30c9\u7528\u30fb\u30c7\u30b3\u30fc\u30c9\u7528\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u793a\u3059\u307b\u304b\u3001\u306a\u305c\u6c4e\u7528\u6027\u304c\u9ad8\u3044\u3068Cobalt Strike\u304c\u30a8\u30df\u30e5\u30ec\u30fc\u30bf\u3068\u3057\u3066\u6709\u52b9\u3067\u3001\u5f93\u6765\u578b\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u5bfe\u7b56\u306e\u8a2d\u8a08\u304c\u96e3\u3057\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u304b\u306b\u3064\u3044\u3066\u3082\u793a\u3057\u307e\u3059\u3002<\/p>\n<table style=\"width: 80.2168%;\">\n<tbody>\n<tr>\n<td style=\"width: 44.9036%;\"><span style=\"font-weight: 400;\">\u95a2\u9023\u3059\u308b Unit 42 \u306e\u30c8\u30d4\u30c3\u30af<\/span><\/td>\n<td style=\"width: 266.942%;\"><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/cobalt-strike-ja\/\"><span style=\"font-weight: 400;\">Cobalt Strike<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/C2-ja\/\"><span style=\"font-weight: 400;\">C2<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/unit42.paloaltonetworks.jp\/category\/tutorial-ja\/\"><span style=\"font-weight: 400;\">Tutorials<\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><a id=\"post-122916-_d1nha5oq9zwf\"><\/a><strong>\u76ee\u6b21<\/strong><\/h2>\n<p><a href=\"#Metadata-Encoding-Algorithm\">\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u7528\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/a><br \/>\n<a href=\"#Base64-Encoding-and-Decoding\">Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/a><br \/>\n<a href=\"#Base64URL-Encoding-and-Decoding\">Base64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/a><br \/>\n<a href=\"#NetBIOS-Encoding-and-Decoding\">NetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/a><br \/>\n<a href=\"#NetBIOSU-Encoding-and-Decoding\">NetBIOSU\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/a><br \/>\n<a href=\"#Mask-Encoding-and-Decoding\">\u30de\u30b9\u30af\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/a><br \/>\n<a href=\"#Cases-in-the-Wild\">\u5b9f\u969b\u306e\u653b\u6483\u4e8b\u4f8b<\/a><br \/>\n<a href=\"#Conclusion\">\u7d50\u8ad6<\/a><br \/>\n<a href=\"#Indicators-of-Compromise\">IoC<\/a><br \/>\n<a href=\"#Additional-Resources\">\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/a><\/p>\n<h2><a id=\"Metadata-Encoding-Algorithm\"><\/a><strong>\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u7528\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/strong><\/h2>\n<p>Cobalt Strike\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u306f5\u3064\u3042\u308a\u307e\u3059\u3002RSA\u3067\u6697\u53f7\u5316\u3057\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308c\u3070\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3053\u306e\u6697\u53f7\u5316\u3057\u305f\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u3092\u7c21\u5358\u306b\u8ee2\u9001\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122871\" aria-describedby=\"caption-attachment-122871\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122871 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image.png\" alt=\"Cobalt Strike\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u306f\u3001Base64\u3001Base64URL\u3001Mask\u3001NetBIOS\u3001NetBIOSU\u3067\u3059\u3002\" width=\"900\" height=\"201\" \/><figcaption id=\"caption-attachment-122871\" class=\"wp-caption-text\">\u56f3 1. Cobalt Strike \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f<\/figcaption><\/figure>\n<h2><a id=\"Base64-Encoding-and-Decoding\"><\/a><strong>Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/strong><\/h2>\n<p>Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9\u306f\u6a19\u6e96\u7684\u306aRFC\u7528\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u5b9f\u88c5\u3067\u3059\u3002\u4f5c\u8005\u306fBase64\u306e\u6587\u5b57\u96c6\u5408\u306b\u306a\u3093\u3089\u5909\u66f4\u3092\u304f\u308f\u3048\u3066\u3044\u307e\u305b\u3093\u3002\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9\u306b\u4f7f\u7528\u3055\u308c\u308b\u6587\u5b57\u306e\u4e00\u89a7\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\"><strong>[ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '\/' ]<\/strong><\/span><\/p>\n<p>Malleable\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306eBase64\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528\u306b\u3064\u3044\u3066\u3001\u5b9f\u969b\u306e\u4f8b\u3092\u3068\u308a\u3042\u3052\u3066\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>1. \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf<\/p>\n<p><a href=\"https:\/\/github.com\/rsmudge\/Malleable-C2-Profiles\/blob\/26323784672913923d20c5a638c6ca79459e8529\/APT\/havex.profile\">Havex.profile<\/a>\u306f\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u60c5\u5831\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3067\u5909\u63db\u3057\u3066\u304b\u3089\u9001\u4fe1\u3057\u307e\u3059\u3002\u56f32\u306f\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u304cBase64\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3001\u305d\u306e\u7d50\u679c\u304c<span style=\"font-family: 'courier new', courier, monospace;\">Cookie<\/span>\u30d8\u30c3\u30c0\u306b\u914d\u7f6e\u3055\u308c\u308b\u69d8\u5b50\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122873\" aria-describedby=\"caption-attachment-122873\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122873 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-1.png\" alt=\"Havex\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3\u3002\u3053\u306e\u56f3\u304c\u793a\u3059\u3088\u3046\u306b\u30e1\u30bf\u30c7\u30fc\u30bf\u306fBase64\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3001\u305d\u306e\u7d50\u679c\u304cCookie\u30d8\u30c3\u30c0\u306b\u914d\u7f6e\u3055\u308c\u308b\u3002 \" width=\"900\" height=\"237\" \/><figcaption id=\"caption-attachment-122873\" class=\"wp-caption-text\">\u56f3 2. Havex\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u5185\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3<\/figcaption><\/figure>\n<p>2. HTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/p>\n<p>\u56f33\u306f\u3053\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3057\u305fHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3067\u3059\u3002\u30cf\u30a4\u30e9\u30a4\u30c8\u8868\u793a\u3057\u305f\u90e8\u5206\u304c\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122875\" aria-describedby=\"caption-attachment-122875\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122875 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-2.png\" alt=\"Havex\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3057\u305fHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3002\u30cf\u30a4\u30e9\u30a4\u30c8\u8868\u793a\u3057\u305f\u90e8\u5206\u304c\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u3082\u306e\u3067\u3059\u3002 \" width=\"900\" height=\"242\" \/><figcaption id=\"caption-attachment-122875\" class=\"wp-caption-text\">\u56f3 3. Havex\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3057\u305fHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/figcaption><\/figure>\n<p>3. Base64\u30c7\u30b3\u30fc\u30c9<\/p>\n<ul>\n<li>\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306f\u4f55\u3092\u4f7f\u3063\u3066\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u3082\u304b\u307e\u3044\u307e\u305b\u3093\u3002\u79c1\u305f\u3061\u306fPython\u306eBase64 \u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u30c7\u30b3\u30fc\u30c9\u3057\u307e\u3057\u305f\u3002\u56f34\u306f\u3053\u306e\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3057\u306616\u9032\u6570\u3067\u8868\u793a\u3059\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002<\/li>\n<li>\u4ee5\u4e0b\u306f\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u30c7\u30b3\u30fc\u30c9\u3057\u305f\u30c7\u30fc\u30bf\u3067\u3001\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308bRSA\u6697\u53f7\u5316\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3067\u3059\u3002<br \/>\n<strong style=\"color: #ff6600; font-family: 'courier new', courier, monospace;\">\"<\/strong><span style=\"color: #ff6600; font-family: 'courier new', courier, monospace;\">751990bee317e74e4f2aa6f13078ef22dd884e065b738f8373f49dee401a069d5dfd1d3e39e94cc637e21364e1fd71ab3322fb9c7a987fc6aa27dfab981f077e7ddc2f20aba8e9d841250adc4edd4d15082445869278f2bbcf66e145aa74152a22b85c9b6c5f15d69f7d8b3708b33deea7198683d6468bd0424f537617f759b5<\/span><strong style=\"color: #ff6600; font-family: 'courier new', courier, monospace;\">\"<\/strong><\/li>\n<\/ul>\n<figure id=\"attachment_122877\" aria-describedby=\"caption-attachment-122877\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122877 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-3.png\" alt=\"\u30b5\u30f3\u30d7\u30eb\u306ePython\u30b9\u30af\u30ea\u30d7\u30c8\u3002\u3053\u308c\u3067\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3057\u306616\u9032\u6570\u3067\u8868\u793a\u3059\u308b\" width=\"900\" height=\"138\" \/><figcaption id=\"caption-attachment-122877\" class=\"wp-caption-text\">\u56f3 4. \u30b5\u30f3\u30d7\u30eb\u306ePython\u30b9\u30af\u30ea\u30d7\u30c8\u3002\u3053\u308c\u3067\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b<\/figcaption><\/figure>\n<h2><a id=\"Base64URL-Encoding-and-Decoding\"><\/a><strong>Base64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/strong><\/h2>\n<p>Base64URL\u306fBase64\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5909\u5f62\u7248\u3067\u3001URL\u3068\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u554f\u984c\u306a\u304f\u6271\u3048\u308b\u6587\u5b57\u96c6\u5408\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u304c\u305d\u306e\u6587\u5b57\u96c6\u5408\u3067\u3059\u3002<\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\"><strong>[ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '-', '_' ]<\/strong><\/span><\/p>\n<p>\u6a19\u6e96Base64\u6587\u5b57\u96c6\u5408\u3068\u306e\u9055\u3044\u306f\u3001\u5909\u5f62\u7248\u304c\u300c+\u300d\u3092\u300c-\u300d\u306b\u3001\u300c\/\u300d\u3092\u300c_\u300d\u306b\u7f6e\u304d\u63db\u3048\u3066\u3044\u308b\u3068\u3053\u308d\u3067\u3059\u3002\u30d1\u30c7\u30a3\u30f3\u30b0\u6587\u5b57\u306e\u300c=\u300d\u306f\u30a8\u30f3\u30b3\u30fc\u30c9\u30c7\u30fc\u30bf\u306b\u306f\u542b\u307e\u308c\u307e\u305b\u3093\u3002\u901a\u5e38\u3001URI\u3067\u306f\u30d1\u30fc\u30bb\u30f3\u30c8\u30a8\u30f3\u30b3\u30fc\u30c9\u304c\u884c\u308f\u308c\u308b\u305f\u3081\u3067\u3059\u3002<\/p>\n<p>Malleable\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306eBase64URL\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528\u306b\u3064\u3044\u3066\u3001\u5b9f\u969b\u306e\u4f8b\u3092\u3068\u308a\u3042\u3052\u3066\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>1. \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf<\/p>\n<p><a href=\"https:\/\/github.com\/rsmudge\/Malleable-C2-Profiles\/blob\/26323784672913923d20c5a638c6ca79459e8529\/normal\/cnnvideo_getonly.profile\">Cnnvideo_getonly.profile<\/a>\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u60c5\u5831\u306e\u5909\u63db\u306bBase64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002\u306a\u304a\u3001\u3053\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306f\u6b63\u898f\u306eCNN HTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u6a21\u5023\u3057\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u305d\u306e\u540d\u304c\u3064\u3044\u3066\u3044\u307e\u3059\u304c\u3001\u5f53\u8a72\u7d44\u7e54\u3068\u306f\u7121\u95a2\u4fc2\u306a\u306e\u3067\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u3055\u3066\u3001\u56f35\u306fBase64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u3001\u30d1\u30e9\u30e1\u30fc\u30bf<span style=\"font-family: 'courier new', courier, monospace;\">g<\/span>\u306b\u30c7\u30fc\u30bf\u3092\u30a2\u30da\u30f3\u30c9\u3057\u305f\u3068\u3053\u308d\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122879\" aria-describedby=\"caption-attachment-122879\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122879 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-4.png\" alt=\"\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u3092Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u3001\u305d\u306e\u30c7\u30fc\u30bf\u3092\u30d1\u30e9\u30e1\u30fc\u30bfg\u306b\u30a2\u30da\u30f3\u30c9\u3057\u3066\u3044\u308b\u3002 \" width=\"900\" height=\"491\" \/><figcaption id=\"caption-attachment-122879\" class=\"wp-caption-text\">\u56f3 5. Cnnvideo\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<p>2. HTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/p>\n<p>\u56f36\u306fBeacon\u304c\u751f\u6210\u3059\u308bHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5024\u306f\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092Base64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122881\" aria-describedby=\"caption-attachment-122881\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122881 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-5.png\" alt=\"Beacon\u304c\u751f\u6210\u3059\u308bHTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3002\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u5024\u306f\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092Base64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u3082\u306e\u3067\u3059\u3002 \" width=\"900\" height=\"245\" \/><figcaption id=\"caption-attachment-122881\" class=\"wp-caption-text\">\u56f3 6. Cnnvideo\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3057\u305fHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/figcaption><\/figure>\n<p>3. Base64URL\u30c7\u30b3\u30fc\u30c9<\/p>\n<p>\u3053\u306e\u30c7\u30fc\u30bf\u306e\u30c7\u30b3\u30fc\u30c9\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u300c+\u300d\u3092\u300c-\u300d\u306b\u3001\u300c_\u300d\u3092\u300c\/\u300d\u306b\u7f6e\u304d\u63db\u3048\u3066\u30d1\u30c7\u30a3\u30f3\u30b0\u6587\u5b57\u306e\u300c=\u300d\u3092\u8ffd\u52a0\u3059\u308b\u3002\u7f6e\u63db\u3057\u305f\u6587\u5b57\u5217\u306f\u6a19\u6e96Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u30c7\u30fc\u30bf\u306b\u306a\u308b\u306e\u3067\u4efb\u610f\u306eBase64\u30c7\u30b3\u30fc\u30c9\u30c4\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u6697\u53f7\u5316\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u5f97\u3089\u308c\u308b\u3002<\/li>\n<li>\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e\u306b\u51e6\u7406\u3055\u305b\u308b\u3002\u56f37\u306b\u3053\u306e\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u793a\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace;\">urlsafe_b64decode<\/span>\u547d\u4ee4\u306f\u6587\u5b57\u3092\u7f6e\u304d\u63db\u3048\u308b\u3060\u3051\u3067\u30d1\u30c7\u30a3\u30f3\u30b0\u6587\u5b57\u306f\u8ffd\u52a0\u3057\u306a\u3044\u306e\u3067\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u300c<span style=\"font-family: 'courier new', courier, monospace;\">=<\/span>\u300d\u3092\u8ffd\u52a0\u3057\u3066Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u4e92\u63db\u306e\u51fa\u529b\u3092\u5f97\u3066\u3044\u308b\u3002\u30d1\u30c7\u30a3\u30f3\u30b0\u6587\u5b57\u306f\u3082\u3063\u3068\u8ffd\u52a0\u3057\u3066\u3082\u3088\u3044\u3002Python\u306f\u30d1\u30c7\u30a3\u30f3\u30b0\u304c\u5c11\u306a\u3059\u304e\u308b\u5834\u5408\u306b\u306e\u307f\u30a8\u30e9\u30fc\u3092\u8fd4\u3059\u3002<\/li>\n<li>\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u51fa\u529b\u3055\u308c\u308bRSA\u3067\u6697\u53f7\u5316\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306f\u6b21\u306e\u3068\u304a\u308a\u3002<span style=\"font-family: 'courier new', courier, monospace; color: #ff6600;\">\"60495dff002eddaa0c409aaaae0fda592810993ae0ae319c87d62b65c54d92447daf2c1bc84930c5d90ed3a023227e254d3a2c28763be372bb7444ef5719d5948b99d33ede3775f51c216bba97bc5fd4777e819517e89a737284c784bdc30b1d6b3b7debe2448c1dc28b00e3ac611fd5a8fd070502f3f7f672786f6b5787af51\"<\/span><\/li>\n<\/ul>\n<figure id=\"attachment_122883\" aria-describedby=\"caption-attachment-122883\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122883 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-6.png\" alt=\"\u30b5\u30f3\u30d7\u30eb\u306ePython\u30b9\u30af\u30ea\u30d7\u30c8\u3002\u3053\u308c\u3067\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b\u3002urlsafe_b64decode\u547d\u4ee4\u306f\u6587\u5b57\u3092\u7f6e\u304d\u63db\u3048\u308b\u3060\u3051\u3067\u30d1\u30c7\u30a3\u30f3\u30b0\u6587\u5b57\u306f\u8ffd\u52a0\u3057\u306a\u3044\u3002\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f '=' \u3092\u8ffd\u52a0\u3057\u3066Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u4e92\u63db\u306e\u51fa\u529b\u3092\u5f97\u3066\u3044\u308b\u3002 \" width=\"900\" height=\"134\" \/><figcaption id=\"caption-attachment-122883\" class=\"wp-caption-text\">\u56f3 7. Base64URL\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u30b9\u30af\u30ea\u30d7\u30c8<\/figcaption><\/figure>\n<h2><a id=\"NetBIOS-Encoding-and-Decoding\"><\/a><strong>NetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/strong><\/h2>\n<p>NetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u306fNetBIOS\u30b5\u30fc\u30d3\u30b9\u540d\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002Cobalt Strike\u306fC2\u901a\u4fe1\u3067\u88ab\u5bb3\u30b7\u30b9\u30c6\u30e0\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u8ee2\u9001\u3059\u308b\u3055\u3044\u3053\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>NetBIOS\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u5404\u30d0\u30a4\u30c8\u30922\u30d0\u30a4\u30c8\u306eASCII\u6587\u5b57\u3067\u8868\u73fe\u3057\u307e\u3059\u3002\u5165\u529b\u30d0\u30a4\u30c8\u306e\u54044\u30d3\u30c3\u30c8\uff08\u3053\u308c\u3092\u300c\u30cb\u30d6\u30eb\u300d\u3068\u3044\u3046\uff09\u306b2\u9032\u6570\u306e\u53f3\u5bc4\u305b\/\u30bc\u30ed\u57cb\u3081\u3092\u884c\u3044\u3001\u305d\u308c\u305e\u308c\u3092\u5225\u306e\u30d0\u30a4\u30c8\u3068\u3057\u3066\u6271\u3044\u307e\u3059\u3002\u305d\u306e\u6570\u5024\u306f\u6b21\u306bASCII\u6587\u5b57\u306e\u300c<span style=\"font-family: 'courier new', courier, monospace;\">a<\/span>\u300d\u306e\u5024\u306b\u52a0\u7b97\u3055\u308c\u3001\u7d50\u679c\u3068\u3057\u3066\u5f97\u3089\u308c\u305f\u30d0\u30a4\u30c8\u3082\u305d\u308c\u305e\u308c\u5225\u306e\u30d0\u30a4\u30c8\u3068\u3057\u3066\u4fdd\u5b58\u3055\u308c\u307e\u3059\u3002\u30a8\u30f3\u30b3\u30fc\u30c9\u306b\u4f7f\u7528\u3059\u308b\u6587\u5b57\u96c6\u5408\u306f<strong>[<span style=\"font-family: 'courier new', courier, monospace;\">a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p']<\/span>\u3067\u3059\u3002<\/strong><\/p>\n<p>\u56f38\u306f\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u306e\u69d8\u5b50\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122885\" aria-describedby=\"caption-attachment-122885\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122885 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-7.png\" alt=\"NetBIOS\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u3092\u5143\u306e\u30d0\u30a4\u30c8\u304b\u3089\u30cb\u30d6\u30eb\u3092\u5206\u5272\u3059\u308b\u624b\u9806\u3001\u6700\u5f8c\u306b'a' (16\u9032\u6570\u30670x61)\u3092\u8ffd\u52a0\u3059\u308b\u624b\u9806\u307e\u3067\u5b9f\u6f14\u3002\" width=\"900\" height=\"581\" \/><figcaption id=\"caption-attachment-122885\" class=\"wp-caption-text\">\u56f3 8. NetBIOS\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406<\/figcaption><\/figure>\n<p>Malleable\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306eNetBIOS\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528\u306b\u3064\u3044\u3066\u3001\u5b9f\u969b\u306e\u4f8b\u3092\u3068\u308a\u3042\u3052\u3066\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>1. \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf<\/p>\n<p><a href=\"https:\/\/github.com\/rsmudge\/Malleable-C2-Profiles\/blob\/26323784672913923d20c5a638c6ca79459e8529\/normal\/ocsp.profile\">Ocsp.profile<\/a>\u306f\u88ab\u5bb3\u30b7\u30b9\u30c6\u30e0\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u5909\u63db\u306bNetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002\u56f39\u306f\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u304cNetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u308b\u69d8\u5b50\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u306fURI\u306b\u30a2\u30da\u30f3\u30c9\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122887\" aria-describedby=\"caption-attachment-122887\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122887 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-8.png\" alt=\"\u30e1\u30bf\u30c7\u30fc\u30bf\u304cNetBIOS\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u306fURI\u306b\u30a2\u30da\u30f3\u30c9\u3055\u308c\u307e\u3059\u3002 \" width=\"900\" height=\"744\" \/><figcaption id=\"caption-attachment-122887\" class=\"wp-caption-text\">\u56f3 9. OCSP\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<p>2. HTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/p>\n<p>\u56f310\u306fBeacon\u304cOCSP\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u751f\u6210\u3059\u308bHTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122889\" aria-describedby=\"caption-attachment-122889\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122889 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-9.png\" alt=\"\u56f3 10. OCSP\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3057\u305fHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\" width=\"900\" height=\"218\" \/><figcaption id=\"caption-attachment-122889\" class=\"wp-caption-text\">\u56f3 10. OCSP\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3057\u305fHTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/figcaption><\/figure>\n<p>3. NetBIOS\u30c7\u30b3\u30fc\u30c9<\/p>\n<p>\u56f311\u306f\u3001NetBIOS\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u306e\u5b9f\u88c5\u3067\u3059\u3002<\/p>\n<p>\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u51fa\u529b\u306f\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092RSA\u3067\u6697\u53f7\u5316\u3057\u305f\u3082\u306e\u3067\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace; color: #ff6600;\">\"5725245edcb589b305e33e02da1cda208ed083bed8a1ae0b3a87da0f9d6ebe31025ab67c58572acb9757288cc2e78bea414249fa8cb0783485a1b5a3c0863501fc1c89c6ac59b7129c51cacbfa197cc64eea31ec8ac204cbcdbefaecf19762f9efcc56280f3e9b183c37f98f371f5e1c08b645524646d7010af4408f4ebb8a2f\"<\/span><\/p>\n<figure id=\"attachment_122891\" aria-describedby=\"caption-attachment-122891\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122891 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-10.png\" alt=\"NetBIOS\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u306e\u5b9f\u88c5\u3002 \" width=\"900\" height=\"209\" \/><figcaption id=\"caption-attachment-122891\" class=\"wp-caption-text\">\u56f3 11. NetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u30b9\u30af\u30ea\u30d7\u30c8<\/figcaption><\/figure>\n<h2><a id=\"NetBIOSU-Encoding-and-Decoding\"><\/a><strong>NetBIOSU\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/strong><\/h2>\n<p>NetBIOSU\u306f\u5148\u306eNetBIOS\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u82e5\u5e72\u5909\u66f4\u3057\u305f\u3082\u306e\u3067\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u306b\u4f7f\u7528\u3059\u308b\u6587\u5b57\u96c6\u5408\u304c\u7570\u306a\u3063\u3066\u3044\u307e\u3059\u3002NetBIOSU\u306e\u6587\u5b57\u96c6\u5408\u306f\u3001\u901a\u5e38\u306eNetBIOS\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u4f7f\u7528\u3055\u308c\u308b\u6587\u5b57\u96c6\u5408\u3092\u5927\u6587\u5b57\u306b\u3057\u305f\u3082\u306e\u3067\u3001\u305d\u306e\u5185\u5bb9\u306f<span style=\"font-family: 'courier new', courier, monospace;\"><strong>['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P']<\/strong><\/span>\u3067\u3059\u3002<\/p>\n<p>NetBIOSU\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u51e6\u7406\u306fNetBIOS\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u540c\u3058\u3067\u3059\u3002\u8a73\u3057\u304f\u306f\u3001\u56f38\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>Malleable\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306eNetBIOSU\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u4f7f\u7528\u306b\u3064\u3044\u3066\u3001\u5b9f\u969b\u306e\u4f8b\u3092\u3068\u308a\u3042\u3052\u3066\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>1. \u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf<\/p>\n<p><a href=\"https:\/\/github.com\/rsmudge\/Malleable-C2-Profiles\/blob\/26323784672913923d20c5a638c6ca79459e8529\/crimeware\/asprox.profile\">Asprox.profile<\/a>\u306f\u88ab\u5bb3\u30b7\u30b9\u30c6\u30e0\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u5909\u63db\u306bNetBIOSU\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002\u56f312\u306f\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u304cNetBIOSU\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u308b\u69d8\u5b50\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u306fURI\u306b\u30a2\u30da\u30f3\u30c9\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122893\" aria-describedby=\"caption-attachment-122893\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122893 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-11.png\" alt=\"\u30e1\u30bf\u30c7\u30fc\u30bf\u304cNetBIOSU\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u308b\u69d8\u5b50\u3002\u5f97\u3089\u308c\u305f\u30c7\u30fc\u30bf\u306fURI\u306b\u30a2\u30da\u30f3\u30c9\u3055\u308c\u307e\u3059\u3002 \" width=\"900\" height=\"605\" \/><figcaption id=\"caption-attachment-122893\" class=\"wp-caption-text\">\u56f3 12. asprox\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<p>2. HTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/p>\n<p>\u56f313\u306f\u3001Beacon\u304casprox\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u751f\u6210\u3059\u308bHTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3001\u30cf\u30a4\u30e9\u30a4\u30c8\u3057\u305f\u7b87\u6240\u304c\u88ab\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122895\" aria-describedby=\"caption-attachment-122895\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122895 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-12.png\" alt=\"Beacon\u304casprox\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u751f\u6210\u3059\u308bHTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3002\u30cf\u30a4\u30e9\u30a4\u30c8\u3057\u305f\u7b87\u6240\u304c\u88ab\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3002 \" width=\"900\" height=\"227\" \/><figcaption id=\"caption-attachment-122895\" class=\"wp-caption-text\">\u56f3 13. Beacon\u304casprox\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u751f\u6210\u3059\u308bHTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/figcaption><\/figure>\n<p>3. NetBIOSU\u30c7\u30b3\u30fc\u30c9<\/p>\n<p>\u56f314\u306f\u3001NetBIOSU\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u306e\u5b9f\u88c5\u3067\u3059\u3002<\/p>\n<p>\u30b9\u30af\u30ea\u30d7\u30c8\u306e\u51fa\u529b\u306f\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u3092RSA\u3067\u6697\u53f7\u5316\u3057\u305f\u3082\u306e\u3067\u3059\u3002<br \/>\n<span style=\"font-family: 'courier new', courier, monospace; color: #ff6600;\">\"722676e535f86ffc29ba1cafb9856d98d1f697a83b0afc5bb143e2cf2242152a351081fb837192da3e3b2d9021fab75ce32677b6299a24d15e28db883adb36c5fe448d5eb47014f6d2e72eff389f0176efced60380450c87e2015a8c5de6aa90dc8f105683ac5fd96dc33d4d63da62818facda595910cf9aee10f36fe54d4a6a\"<\/span><\/p>\n<figure id=\"attachment_122897\" aria-describedby=\"caption-attachment-122897\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122897 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-13.png\" alt=\"NetBIOSU\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u306e\u5b9f\u88c5\u3002 \" width=\"900\" height=\"228\" \/><figcaption id=\"caption-attachment-122897\" class=\"wp-caption-text\">\u56f3 14. NetBIOSU\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308bPython\u30b9\u30af\u30ea\u30d7\u30c8<\/figcaption><\/figure>\n<h2><a id=\"Mask-Encoding-and-Decoding\"><\/a><strong>\u30de\u30b9\u30af\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/strong><\/h2>\n<p>\u30de\u30b9\u30af\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306fMalleable C2\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u307b\u304b\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u6307\u5b9a\u3057\u3066\u7d44\u307f\u5408\u308f\u305b\u3067\u4f7f\u3048\u307e\u3059\u3002\u305d\u306e\u5185\u5bb9\u3092TeamServer\u304c\u30ed\u30fc\u30c9\u3057\u3066C2\u901a\u4fe1\u3068\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Beacon\u306f\u30e9\u30f3\u30c0\u30e0\u306a4\u30d0\u30a4\u30c8\u3092\u30de\u30b9\u30af\u306eXOR\u30ad\u30fc\u3068\u3057\u3066\u751f\u6210\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u751f\u6210\u3057\u305f\u30de\u30b9\u30af\u30ad\u30fc\u3067\u3001\u6697\u53f7\u5316\u3057\u305f128\u30d0\u30a4\u30c8\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u3092XOR\u3057\u3001\u30de\u30b9\u30af\u30ad\u30fc\u3068\u6697\u53f7\u5316\u30c7\u30fc\u30bf\u3092C2\u901a\u4fe1\u306e\u305f\u3081\u306bTeamServer\u306b\u9001\u308a\u307e\u3059\u3002\u4f8b\u3068\u3057\u3066 <a href=\"https:\/\/github.com\/rsmudge\/Malleable-C2-Profiles\/blob\/master\/normal\/randomized.profile\">randomized.profile<\/a>\u306e\u5185\u5bb9\u3092\u9806\u3092\u8ffd\u3063\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<p>1. \u56f315\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30de\u30b9\u30af\u3068Base64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u4e00\u90e8\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306fURI\u3068\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u30de\u30b9\u30af\u3068Base64URL\u3068\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306fURI\u306b\u30a2\u30da\u30f3\u30c9\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122899\" aria-describedby=\"caption-attachment-122899\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122899 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-14.png\" alt=\"\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u30de\u30b9\u30af\u3068Base64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u4e00\u90e8\u3092\u793a\u3057\u305f\u3082\u306e\u3002\u3053\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067\u306fURI\u3068\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u30de\u30b9\u30af\u3068Base64URL\u3068\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306fURI\u306b\u30a2\u30da\u30f3\u30c9\u3055\u308c\u307e\u3059\u3002 \" width=\"900\" height=\"295\" \/><figcaption id=\"caption-attachment-122899\" class=\"wp-caption-text\">\u56f3 15. \u30e9\u30f3\u30c0\u30e0\u5316\u3055\u308c\u305f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9\u30aa\u30d7\u30b7\u30e7\u30f3<\/figcaption><\/figure>\n<p>2. HTTP C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/p>\n<p>\u56f316\u306f\u56f315\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u57fa\u3065\u304fC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306a\u306e\u3067\u3001\u6b21\u306e\u624b\u9806\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u30c7\u30fc\u30bf\u3092\u5143\u306b\u623b\u305b\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u304b\u3089\u3001\u5168\u4f53\u306eURI\u304c<span style=\"font-family: 'courier new', courier, monospace;\">\/zChN7QMDhftv10Li9Cu-fm_T_3qDQawT-Z1GzNg1FWfAfSILT-u_rKLvXP-RE0ac-pxJTlGFCUIm4Aw9rGHPCIJVl0zNdCbM_G2VkYXJ5GGtVh8LWM4YLGZD9okLcFBc402j5zESK71HaR_owJb-AVBfFvAo8q0I2J74rmfGyIROyg<\/span>\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/li>\n<li>\u63a5\u982d\u8f9e\u306e<span style=\"font-family: 'courier new', courier, monospace;\">\/zC<\/span>\u3092\u53d6\u308a\u9664\u304d\u307e\u3059\u3002\u6b8b\u308a\u306e\u5024\u306fBase64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hN7QMDhftv10Li9Cu-fm_T_3qDQawT-Z1GzNg1FWfAfSILT-u_rKLvXP-RE0ac-pxJTlGFCUIm4Aw9rGHPCIJVl0zNdCbM_G2VkYXJ5GGGtVh8S0LWMM4YLGZD9okLcFBc402j5zESK71HaR_owJb-AVBfFvAo8q0I2J74rmfGyIROyg<\/span><\/li>\n<\/ul>\n<figure id=\"attachment_122901\" aria-describedby=\"caption-attachment-122901\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122901 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-15.png\" alt=\"\u56f315\u306e\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u57fa\u3065\u304fC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3002\u672c\u6587\u3067\u8a73\u3057\u304f\u8aac\u660e\u3057\u305f\u624b\u9806\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u30c7\u30fc\u30bf\u3092\u5143\u306b\u623b\u305b\u308b\u3002 \" width=\"900\" height=\"174\" \/><figcaption id=\"caption-attachment-122901\" class=\"wp-caption-text\">\u56f3 16. \u30e9\u30f3\u30c0\u30e0\u5316\u3055\u308c\u305f\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306b\u57fa\u3065\u304fC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af<\/figcaption><\/figure>\n<p>3. \u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9<\/p>\n<ul>\n<li>Base64URL\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9 Base64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30c7\u30fc\u30bf:<br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hN7QMDhftv10Li9Cu-fm_T_3qDQawT-Z1GzNg1FWfAfSILT-u_rKLvXP-RE0ac-pxJTlGFCUIm4Aw9rGHPCIJVl0zNdCbM_G2VkYXJ5GGGtVh8S0LWMM4YLGZD9okLcFBc402j5zESK71HaR_owJb-AVBfFvAo8q0I2J74rmfGyIROyg<\/span><\/li>\n<li>Base64URL\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30c7\u30fc\u30bf: <span style=\"font-family: 'courier new', courier, monospace;\"><span style=\"font-family: 'courier new', courier, monospace;\"><span style=\"color: #ff6600;\">84ded030<\/span>385fb6fd742e2f42bbe7e6fd3ff7a8341ac13f99d46ccd8351567c07d220b4febbfaca2ef5cff9113469cfa9c494e5185094226e00c3dac61cf088255974ccd7426ccfc6d959185c9e46186b5587c4b42d630ce182c6643f6890b70505ce34da3e731122bbd47691fe8c096fe01505f16f028f2ad08d89ef8ae67c6c8844eca0<\/span><\/span> \u56f317\u306b\u793a\u3057\u305f\u30b3\u30fc\u30c9\u306e\u3088\u3046\u306b\u3001Python\u306eBase64\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066Base64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b\u3068\u3001\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u305f16\u9032\u30c7\u30fc\u30bf\u306e\u9577\u3055\u306f132\u3067\u3001\u6700\u521d\u306e4\u30d0\u30a4\u30c8(<span style=\"font-family: 'courier new', courier, monospace; color: #ff6600;\">84ded030<\/span>)\u304c\u30de\u30b9\u30af\u306eXOR\u30ad\u30fc\u3067\u3059\u3002\u6b8b\u308a\u306e128\u30d0\u30a4\u30c8\u306f\u3001\u30de\u30b9\u30af\u306eXOR\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3067\u3059\u3002Python\u30b3\u30fc\u30c9\u3067\u306eBase64URL\u30c7\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<figure id=\"attachment_122903\" aria-describedby=\"caption-attachment-122903\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122903 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-16.png\" alt=\"Python Base64\u30e9\u30a4\u30d6\u30e9\u30ea\u3067Base64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b\u3002 \" width=\"900\" height=\"120\" \/><figcaption id=\"caption-attachment-122903\" class=\"wp-caption-text\">\u56f3 17. Base64URL\u30c7\u30b3\u30fc\u30c9\u3092\u884c\u3046Python3\u306e\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<ul>\n<li>\u30de\u30b9\u30af\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9: \u30de\u30b9\u30af\u306e\u30ad\u30fc\u306f<span style=\"font-family: 'courier new', courier, monospace; color: #ff6600;\">84ded030<\/span>\u3067\u3059\u3002\u30de\u30b9\u30af\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u30c7\u30fc\u30bf\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace;\">385fb6fd742e2f42bbe7e6fd3ff7a8341ac13f99d46ccd8351567c07d220b4febbfaca2ef5cff9113469cfa9c494e5185094226e00c3dac61cf088255974ccd7426ccfc6d959185c9e46186b5587c4b42d630ce182c6643f6890b70505ce34da3e731122bbd47691fe8c096fe01505f16f028f2ad08d89ef8ae67c6c8844eca0<\/span>\u30de\u30b9\u30af\u30c7\u30b3\u30fc\u30c9\u3057\u305f\u30c7\u30fc\u30bf:<br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">bc8166cdf0f0ff723f3936cdbb2978049e1fefa950b21db3d588ac3756fe64ce3f241a1e71112921b0b71f99404a3528d44af25e841d0af6982e5815ddaa1ce7c6b21ff65d87c86c1a98c85bd1591484a9bddcd10618b40fec4e67358110e4eabaadc1123f0aa6a17a52d95f64cbd5c1ebdc5f1a545359df0e38ac5c0c9a3c90<\/span><\/p>\n<p>\u56f318\u306ePython\u30b3\u30fc\u30c9\u3067\u30de\u30b9\u30af\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u30c7\u30fc\u30bf\u3092\u30c7\u30b3\u30fc\u30c9\u3059\u308b\u3068\u3001\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u305f16\u9032\u30c7\u30fc\u30bf\u306e\u9577\u3055\u306f128\u30d0\u30a4\u30c8\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e128\u30d0\u30a4\u30c8\u306fRSA\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u6697\u53f7\u5316\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3067\u3001\u8a73\u7d30\u306f\u3061\u304b\u304f\u516c\u958b\u4e88\u5b9a\u306e\u30d6\u30ed\u30b0\u3067\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p>\u30de\u30b9\u30af\u30c7\u30b3\u30fc\u30c9\u3092\u884c\u3046Python\u30b3\u30fc\u30c9:<\/li>\n<\/ul>\n<figure id=\"attachment_122905\" aria-describedby=\"caption-attachment-122905\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122905 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-17.png\" alt=\"\u3053\u306ePython\u30b3\u30fc\u30c9\u306fMask\u30a8\u30f3\u30b3\u30fc\u30c9\u3057\u305f\u30c7\u30fc\u30bf\u306e\u30c7\u30b3\u30fc\u30c9\u306b\u4f7f\u3048\u308b \" width=\"900\" height=\"321\" \/><figcaption id=\"caption-attachment-122905\" class=\"wp-caption-text\">\u56f3 18. \u30de\u30b9\u30af\u30c7\u30b3\u30fc\u30c9\u3092\u884c\u3046Python3\u306e\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<h2><a id=\"Cases-in-the-Wild\"><\/a><strong>\u5b9f\u969b\u306e\u653b\u6483\u4e8b\u4f8b<\/strong><\/h2>\n<p>\u4ee5\u4e0b\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001\u5b9f\u969b\u306b\u30de\u30eb\u30a6\u30a7\u30a2\u306b\u3088\u308b\u4f7f\u7528\u304c\u78ba\u8a8d\u3055\u308c\u305f\u30012\u3064\u306e\u7570\u306a\u308b\u4e8b\u4f8b\u3067\u306eCobalt Strike\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u30021\u3064\u3081\u306e\u4e8b\u4f8b\u3067\u306fBase64\u30a8\u30f3\u30b3\u30fc\u30c9\u304c\u4f7f\u308f\u308c\u30012\u3064\u3081\u306e\u4e8b\u4f8b\u3067\u306fBase64URL\u30a8\u30f3\u30b3\u30fc\u30c9\u304c\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306f<a href=\"https:\/\/www.paloaltonetworks.jp\/cortex\/autofocus\">AutoFocus<\/a>\u30b7\u30b9\u30c6\u30e0\u306e<span style=\"font-family: 'courier new', courier, monospace;\">Unit42.CobaltStrike<\/span>\u30bf\u30b0\u4ee5\u4e0b\u3067\u9759\u7684\u30fb\u52d5\u7684\u5206\u6790\u306b\u3088\u308a\u3053\u308c\u3089\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u7279\u5b9a\u3057\u307e\u3057\u305f\u3002<\/p>\n<h3><a id=\"post-122916-_2lj5tzlirmtq\"><\/a>Base64\u30a8\u30f3\u30b3\u30fc\u30c9<\/h3>\n<p>SHA256: <span style=\"font-family: 'courier new', courier, monospace;\">6b6413a059a9f12d849c007055685d981ddb0ff308d6e3c2638d197e6d3e8802<\/span><\/p>\n<figure id=\"attachment_122907\" aria-describedby=\"caption-attachment-122907\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122907 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-18.png\" alt=\"\u30de\u30eb\u30a6\u30a7\u30a2\u306b\u3088\u308bCobalt Strike\u306e\u5229\u7528\u5b9f\u4f8b\u3002\u3053\u306e\u4e8b\u4f8b\u3067\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u304cBase64\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u3002 \" width=\"900\" height=\"320\" \/><figcaption id=\"caption-attachment-122907\" class=\"wp-caption-text\">\u56f3 19. Base64\u30a8\u30f3\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<h3><a id=\"post-122916-_i4gqz64zi7ma\"><\/a>Base64URL\u30a8\u30f3\u30b3\u30fc\u30c9<\/h3>\n<p>SHA256: <span style=\"font-family: 'courier new', courier, monospace;\">f6e75c20ddcbe3bc09e1d803a8268a00bf5f7e66b7dbd221a36ed5ead079e093<\/span><\/p>\n<figure id=\"attachment_122909\" aria-describedby=\"caption-attachment-122909\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122909 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-19.png\" alt=\"\u30de\u30eb\u30a6\u30a7\u30a2\u306b\u3088\u308bCobalt Strike\u306e\u5229\u7528\u5b9f\u4f8b\u3002\u3053\u306e\u4e8b\u4f8b\u3067\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u304cBase64URL\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u3002 \" width=\"900\" height=\"419\" \/><figcaption id=\"caption-attachment-122909\" class=\"wp-caption-text\">\u56f3 20. Base64URL\u30a8\u30f3\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<h2><a id=\"Conclusion\"><\/a><strong>\u7d50\u8ad6<\/strong><\/h2>\n<p>Cobalt Strike\u306f\u4fb5\u5bb3\u5f8c\u306e\u30a2\u30af\u30bf\u30fc\u3092\u30a8\u30df\u30e5\u30ec\u30fc\u30c8\u3059\u308b\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002\u4e0a\u8a18\u306e5\u3064\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u5de7\u5999\u3067\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u691c\u51fa\u56de\u907f\u3092\u306d\u3089\u3063\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30d7\u30e9\u30a4\u30a2\u30f3\u30b9\u5358\u4f53\u3067\u306fCobalt Strike\u306e\u653b\u6483\u3092\u9632\u3052\u306a\u3044\u306e\u3067\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001\u30b5\u30f3\u30c9\u30dc\u30c3\u30af\u30b9\u3001\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u3001\u3055\u3089\u306b\u3053\u308c\u3089\u3059\u3079\u3066\u306e\u8981\u7d20\u3092\u7d71\u5408\u3057\u3066\u304f\u308c\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u3046\u3053\u3068\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001\u6b21\u306e\u65b9\u6cd5\u3067\u3053\u306e\u7a2e\u306e\u653b\u6483\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li><a href=\"https:\/\/www.paloaltonetworks.jp\/products\/secure-the-network\/subscriptions\/threat-prevention\">\u8105\u5a01\u9632\u5fa1<\/a>\u30b7\u30b0\u30cd\u30c1\u30e386445\u306886446\u3092\u542b\u3080<a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/next-generation-firewall\">\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a>(NGFW)\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u306eBase64\u30e1\u30bf\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c9\u3092\u884c\u3046HTTP C2\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u8b58\u5225\u3057\u307e\u3059\u3002<\/li>\n<li>NGFW\u7528\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3<a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/wildfire\">WildFire<\/a>\u3068<a href=\"https:\/\/www.paloaltonetworks.jp\/cortex\/cortex-xdr\">Cortex XDR<\/a>\u306fCobalt Strike Beacon\u3092\u8b58\u5225\u30fb\u30d6\u30ed\u30c3\u30af\u3057\u307e\u3059\u3002<\/li>\n<li><a href=\"https:\/\/www.paloaltonetworks.com\/products\/secure-the-network\/subscriptions\/autofocus\">AutoFocus<\/a>\u3092\u304a\u4f7f\u3044\u306e\u304a\u5ba2\u69d8\u306f\u6b21\u306e\u30bf\u30b0\u3092\u4f7f\u7528\u3057\u3066\u3053\u308c\u3089\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u8ffd\u8de1\u3067\u304d\u307e\u3059: <a href=\"https:\/\/autofocus.paloaltonetworks.com\/#\/tag\/Unit42.Cobaltstrike\">CobaltStrike<\/a><\/li>\n<\/ol>\n<h2><a id=\"Indicators-of-Compromise\"><\/a><strong>IoC (\u4fb5\u5bb3\u6307\u6a19)<\/strong><\/h2>\n<h3><a id=\"post-122916-_763h15eckspk\"><\/a>Cobalt Strike \u30b5\u30f3\u30d7\u30eb<\/h3>\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">6b6413a059a9f12d849c007055685d981ddb0ff308d6e3c2638d197e6d3e8802<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">f6e75c20ddcbe3bc09e1d803a8268a00bf5f7e66b7dbd221a36ed5ead079e093<\/span><\/li>\n<\/ul>\n<h3><a id=\"post-122916-_u7f7n141ag7e\"><\/a>Cobalt Strike Beacon \u30b5\u30f3\u30d7\u30eb<\/h3>\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">\/n9Rd<\/span>\n<ul>\n<li>SHA256\u30cf\u30c3\u30b7\u30e5:\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">fc95e7f4c8ec810646c16c8b6075b0b9e2cc686153cdad46e82d6cca099b19e7<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">\/flas<\/span>\n<ul>\n<li>SHA-256\u30cf\u30c3\u30b7\u30e5:\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">11b8beaa53353f5f52607e994849c3086733dfa01cc57fea2dae42eb7a6ee972<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><a id=\"post-122916-_t06djbjund6r\"><\/a>Cobalt Strike TeamServer\u306eIP\u30a2\u30c9\u30ec\u30b9<\/h3>\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">80.255.3[.]109<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">143.244.178[.]247<\/span><\/li>\n<\/ul>\n<h2><a id=\"Additional-Resources\"><\/a><strong>\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/strong><\/h2>\n<p><a href=\"https:\/\/www.cobaltstrike.com\/training\">Cobalt Strike Training (Cobalt Strike\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0)<\/a><br \/>\n<a href=\"https:\/\/www.cobaltstrike.com\/help-malleable-c2\">Cobalt Strike Malleable C2 Profile (Cobalt Strike Malleable C2\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb)<\/a><br \/>\n<a href=\"https:\/\/unit42.paloaltonetworks.jp\/cobalt-strike-malleable-c2-profile\/\">Cobalt Strike\u89e3\u6790&amp;\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: Malleable C2\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3067Cobalt Strike\u691c\u51fa\u304c\u96e3\u3057\u304f\u306a\u308b\u7406\u7531<\/a><br \/>\n<a href=\"https:\/\/live.paloaltonetworks.com\/t5\/blogs\/cobalt-strike-attack-detection-amp-defense-technology-overview\/ba-p\/533753\" target=\"_blank\" rel=\"noopener\"><span class=\"lia-inline-image-display-wrapper lia-image-align-inline\"><span class=\"lia-inline-image-caption\">Cobalt Strike Attack Detection &amp; Defense Technology Overview<\/span><\/span><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 Cobalt Strike\u306f\u5546\u7528\u306e\u8105\u5a01\u30a8\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u9577\u671f\u7684\u306b\u3072\u305d\u3080\u30a2\u30af\u30bf\u30fc\u3092\u30a8\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u307e\u3059\u3002Beacon\u3068\u547c\u3070\u308c\u308b\u3053\u306e\u30a2\u30af\u30bf\u30fc\u306f\u5916\u90e8\u30c1\u30fc\u30e0\u30b5\u30fc\u30d0\u30fc\u3068\u901a\u4fe1\u3057\u3066\u30b3\u30de\u30f3\u30c9\uff06\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb<\/p>\n","protected":false},"author":347,"featured_media":134402,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4438,4435,4428],"tags":[4843,4899,5381,4869,4871,5383],"product_categories":[],"coauthors":[2423,1360,2479,845,1726],"class_list":["post-122916","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cybersecurity-tutorials-ja","category-learning-hub-ja","category-threat-research-ja","tag-c2-ja","tag-cobalt-strike-ja","tag-cobalt-strike-series-ja","tag-evasion-ja","tag-malleable-c2-profile-ja","tag-post-exploitation-ja"],"yoast_head":"<!-- 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Strike\u306f\u306a\u305c\u30a8\u30df\u30e5\u30ec\u30fc\u30bf\u3068\u3057\u3066\u6709\u52b9\u3067\u3001\u5f93\u6765\u578b\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u5bfe\u7b56\u306e\u8a2d\u8a08\u304c\u96e3\u3057\u304f\u306a\u308b\u306e\u304b\u3082\u793a\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unit42.paloaltonetworks.com\/ja\/cobalt-strike-metadata-encoding-decoding\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cobalt Strike\u89e3\u6790&amp;\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: Cobalt Strike\u306b\u3088\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u3068\u30c7\u30b3\u30fc\u30c9\" \/>\n<meta property=\"og:description\" content=\"Cobalt Strike \u306eC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u3067\u5229\u7528\u3055\u308c\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u7528\u30fb\u30c7\u30b3\u30fc\u30c9\u7528\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e05\u7a2e\u985e\u304c\u305d\u308c\u305e\u308c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002\u6c4e\u7528\u6027\u306e\u9ad8\u3044Cobalt Strike\u306f\u306a\u305c\u30a8\u30df\u30e5\u30ec\u30fc\u30bf\u3068\u3057\u3066\u6709\u52b9\u3067\u3001\u5f93\u6765\u578b\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u5bfe\u7b56\u306e\u8a2d\u8a08\u304c\u96e3\u3057\u304f\u306a\u308b\u306e\u304b\u3082\u793a\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/unit42.paloaltonetworks.com\/ja\/cobalt-strike-metadata-encoding-decoding\/\" \/>\n<meta property=\"og:site_name\" content=\"Unit 42\" \/>\n<meta property=\"article:published_time\" content=\"2022-05-09T06:18:46+00:00\" \/>\n<meta property=\"article:modified_time\" 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\u306eC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u3067\u5229\u7528\u3055\u308c\u308b\u30a8\u30f3\u30b3\u30fc\u30c9\u7528\u30fb\u30c7\u30b3\u30fc\u30c9\u7528\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e05\u7a2e\u985e\u304c\u305d\u308c\u305e\u308c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002\u6c4e\u7528\u6027\u306e\u9ad8\u3044Cobalt 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