{"id":123996,"date":"2022-07-13T19:40:39","date_gmt":"2022-07-14T02:40:39","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=123996"},"modified":"2025-08-25T04:19:52","modified_gmt":"2025-08-25T11:19:52","slug":"cobalt-strike-metadata-encryption-decryption","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/cobalt-strike-metadata-encryption-decryption\/","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\u6697\u53f7\u5316\u3068\u5fa9\u53f7"},"content":{"rendered":"<h2><a id=\"post-123996-_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\u90e8TeamServer\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\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306a\u3069\u304c\u305d\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<p>\u4ee5\u524d\u306e\u30d6\u30ed\u30b0\u300c<a href=\"https:\/\/unit42.paloaltonetworks.jp\/cobalt-strike-metadata-encoding-decoding\/\">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<\/a>\u300d\u3067\u306f\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u304cHTTP\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7528\u306b\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u308b\u3053\u3068\u3092\u5b66\u3073\u307e\u3057\u305f\u3002<\/p>\n<p>Cobalt Strike Beacon\u306f\u3001Phone Home\u901a\u4fe1 (C2\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u9023\u7d61\u901a\u4fe1)\u6642\u306b\u3001RSA\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u516c\u958b\u9375\u3067\u30e1\u30bf\u30c7\u30fc\u30bf(\u4fb5\u5bb3\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u3059\u308b\u60c5\u5831)\u3092\u6697\u53f7\u5316\u3057\u3001Cobalt Strike TeamServer\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002TeamServer\u306f\u79d8\u5bc6\u9375\u3092\u4f7f\u3063\u3066Beacon\u306e\u5e73\u6587\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u5fa9\u5143\u3057\u3001Beacon\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3092\u8b58\u5225\u3057\u307e\u3059\u3002\u307e\u305f\u5fa9\u53f7\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u304b\u3089\u306fAES\u306e\u5171\u901a\u9375\u3092\u62bd\u51fa\u53ef\u80fd\u3067\u3059\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u30b5\u30fc\u30d0\u30fc\u306f\u3053\u306eAES\u9375\u3092\u4f7f\u3063\u3066\u305d\u306e\u5f8c\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u30c7\u30fc\u30bf\u3084\u30ec\u30b9\u30dd\u30f3\u30b9\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7\u3092\u884c\u3044\u3001C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u3092\u7d42\u4e86\u3057\u307e\u3059\u3002<\/p>\n<p>\u672c\u7a3f\u3067\u306f\u3001\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3001\u9375\u306e\u751f\u6210\u30fb\u62bd\u51fa\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30b9\u30ad\u30fc\u30de\u5b9a\u7fa9\u306e\u8a73\u7d30\u8aac\u660e\u3068\u30c7\u30e2\u3092\u884c\u3044\u307e\u3059\u3002\u307e\u305f\u3001C2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u3067\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u793a\u3057\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\u9632\u5fa1\u304c\u96e3\u3057\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u306e\u304b\u306b\u3064\u3044\u3066\u3082\u793a\u3057\u307e\u3059\u3002\u3053\u3053\u304c\u672c\u7a3f\u3067\u3082\u3068\u308a\u308f\u3051\u8208\u5473\u6df1\u3044\u90e8\u5206\u306e\u3072\u3068\u3064\u3067\u3057\u3087\u3046\u3002<\/p>\n<table style=\"width: 89.2921%;\">\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: 254.03%;\"><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-123996-_d1nha5oq9zwf\"><\/a>\u76ee\u6b21<\/h2>\n<p><a href=\"#post-123996-_xo0txwjxe2xo\">\u30c7\u30fc\u30bf\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/a><br \/>\n<a href=\"#post-123996-_aubaskmy983x\">\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30b9\u30ad\u30fc\u30de\u5b9a\u7fa9<\/a><br \/>\n<a href=\"#post-123996-_qssyqy1vf3pd\">\u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u306e\u751f\u6210\u30fb\u62bd\u51fa<\/a><br \/>\n<a href=\"#post-123996-_ul13omw62lhd\">RSA\u3068AES\u306b\u3088\u308bC2\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\/\u5fa9\u53f7\u306e\u4e00\u4f8b<\/a><br \/>\n<a href=\"#post-123996-_eijf9lk8gvyu\">\u7d50\u8ad6<\/a><br \/>\n<a href=\"#post-123996-_v8176g40kstn\">IoC<\/a><br \/>\n<a href=\"#post-123996-_570cbe1pdhwx\">\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/a><\/p>\n<h2><a id=\"post-123996-_xo0txwjxe2xo\"><\/a><strong>\u30c7\u30fc\u30bf\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/strong><\/h2>\n<p>Cobalt Strike Beacon\u306f\u3001TeamServer\u3068\u901a\u4fe1\u3059\u308b\u3055\u3044\u3001\u5171\u901a\u9375\u6697\u53f7(AES)\u3068\u516c\u958b\u9375\u6697\u53f7(RSA)\u306e\u6697\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u4f7f\u7528\u3057\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001TeamServer\u304c\u65b0\u305f\u306a\u516c\u958b\u9375\u3068\u79d8\u5bc6\u9375\u306e\u30da\u30a2\u3092\u751f\u6210\u3057\u3001\u3053\u306e\u9375\u30da\u30a2\u3092<span style=\"font-family: 'courier new', courier, monospace;\">.cobaltstrike.beacon_keys<\/span>\u30d5\u30a1\u30a4\u30eb\u306b\u683c\u7d0d\u3057\u307e\u3059\u3002\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306fCobalt Strike\u306esetup\u306e\u89e3\u51cd\u5148\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3068\u540c\u3058\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u304c\u3059\u3067\u306b\u5b58\u5728\u3059\u308b\u5834\u5408\u306f\u540c\u3058\u30ad\u30fc\u30da\u30a2\u304c\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u516c\u958b\u9375\u6697\u53f7\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306fRSA\/ECB\/PKCS1Padding\u65b9\u5f0f\u3001\u5171\u901a\u9375\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306fAES\/CBC\/NoPadding\u65b9\u5f0f\u3067\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\/\u5fa9\u53f7\u3092\u884c\u3044\u307e\u3059\u3002AES\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u3001\u30cf\u30fc\u30c9\u30b3\u30fc\u30c9\u3055\u308c\u305f\u521d\u671f\u5316\u30d9\u30af\u30c8\u30eb(IV)\u3067\u521d\u671f\u5316\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u9759\u7684IV\u306f<span style=\"font-family: 'courier new', courier, monospace;\">abcdefghijklmnop<\/span>\u3067\u3059\u3002<\/p>\n<p>\u56f31\u306fCobalt Strike Beacon\u3068TeamServer\u3068\u306e\u9593\u306eC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123984\" aria-describedby=\"caption-attachment-123984\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123984 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/figure-1.png\" alt=\"\u3053\u306e\u56f3\u306f\u3001Beacon\u30d7\u30ed\u30bb\u30b9(\u5de6)\u3068TeamServer(\u53f3)\u306e\u9593\u306e\u901a\u4fe1\u306e\u6d41\u308c\u306e\u8a73\u7d30\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u901a\u4fe1\u3067\u306f\u3001Beacon\u30d7\u30ed\u30bb\u30b9\u304cGET\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u7d4c\u7531\u3067RSA\u3067\u6697\u53f7\u5316\u3057\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3057\u3001AES\u3067\u6697\u53f7\u5316\u3055\u308c\u305f\u30bf\u30b9\u30af\u3092\u53d7\u4fe1\u3059\u308b\u69d8\u5b50\u304c\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001Beacon\u30d7\u30ed\u30bb\u30b9\u304cTeamServer\u306bAES\u3067\u6697\u53f7\u5316\u3055\u308c\u305f\u30bf\u30b9\u30af\u306e\u7d50\u679c\u3092\u9001\u4fe1\u3057\u3001\u305d\u306e\u5fdc\u7b54\u3092\u53d7\u4fe1\u3057\u3066\u7834\u68c4\u3059\u308b\u69d8\u5b50\u3082\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002 \" width=\"900\" height=\"437\" \/><figcaption id=\"caption-attachment-123984\" class=\"wp-caption-text\">\u56f3 1. C2 Beacon\u30d7\u30ed\u30bb\u30b9\u3068TeamServer\u306e\u9593\u306e\u901a\u4fe1<\/figcaption><\/figure>\n<h2><a id=\"post-123996-_aubaskmy983x\"><\/a><strong>\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30b9\u30ad\u30fc\u30de\u5b9a\u7fa9<\/strong><\/h2>\n<p>\u30e1\u30bf\u30c7\u30fc\u30bf\u306f\u305d\u306e\u540d\u304c\u793a\u3059\u901a\u308a\u6a19\u7684\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002\u30e1\u30bf\u30c7\u30fc\u30bf\u306f\u5148\u982d\u306b4\u30d0\u30a4\u30c8\u306e\u30de\u30b8\u30c3\u30af\u30ca\u30f3\u30d0\u30fc(0xBEEF)\u3092\u3082\u3064\u69cb\u9020\u5316\u3055\u308c\u305f\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u56f32\u306b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123986\" aria-describedby=\"caption-attachment-123986\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123986 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/figure-2.png\" alt=\"Beacon\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u69cb\u9020\u306b\u306f\u3001\u56f3\u306e\u3088\u3046\u306a\u30d8\u30c3\u30c0\u3001\u30c7\u30fc\u30bf\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30b5\u30a4\u30ba\u3092\u793a\u3059\u3072\u3068\u7d9a\u304d\u306e\u30d0\u30a4\u30c8\u3001\u6700\u5f8c\u306b\u5fa9\u53f7\u3055\u308c\u305f\u30c7\u30fc\u30bf\u305d\u306e\u3082\u306e\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002 \" width=\"900\" height=\"225\" \/><figcaption id=\"caption-attachment-123986\" class=\"wp-caption-text\">\u56f3 2. Beacon\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u69cb\u9020<\/figcaption><\/figure>\n<p>\u5fa9\u53f7\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306f\u3055\u307e\u3056\u307e\u306a\u60c5\u5831\u306e\u304b\u305f\u307e\u308a(Blob)\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u5fa9\u53f7\u3055\u308c\u305fBlob\u306e\u69cb\u9020\u306fCobalt Strike\u306e\u30d0\u30fc\u30b8\u30e7\u30f34.0\u3067\u66f4\u65b0\u3055\u308c\u3066\u304a\u308a\u3001Beacon\u306f\u30e1\u30bf\u30c7\u30fc\u30bf\u306b\u3055\u3089\u306b\u591a\u304f\u306e\u60c5\u5831\u3092\u8ffd\u52a0\u3057\u3066\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u30b5\u30a4\u30ba\u306f4\u30d0\u30a4\u30c8\u3067\u3001\u3053\u308c\u306f\u4f5c\u8005\u304c\u5c06\u6765\u7684\u306b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u3092\u66f4\u65b0\u3059\u308b\u53ef\u80fd\u6027\u3092\u793a\u5506\u3057\u3066\u3044\u307e\u3059\u3002\u56f33\u306f\u3001\u30e1\u30bf\u30c7\u30fc\u30bf\u306b\u8a70\u3081\u8fbc\u307e\u308c\u3066\u3044\u308b\u3055\u307e\u3056\u307e\u306a\u60c5\u5831\u306e\u7a2e\u985e\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u69cb\u6210\u306f\u73fe\u5728\u306e\u5b9f\u88c5\u306b\u6e96\u3058\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123953\" aria-describedby=\"caption-attachment-123953\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123953 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-66.png\" alt=\"Cobalt Strike\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u30b9\u30ad\u30fc\u30de\u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u305f\u56f3\u3002\u30d8\u30c3\u30c0\u3001\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u30d5\u30a3\u30fc\u30eb\u30c9\u3001ANSI\u6587\u5b57\u30bb\u30c3\u30c8\u3001OEM\u6587\u5b57\u30bb\u30c3\u30c8\u3001BeaconID\u3001\u30d7\u30ed\u30bb\u30b9ID\u3001\u30dd\u30fc\u30c8\u3001\u30d5\u30e9\u30b0\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u756a\u53f7\u3001\u30d3\u30eb\u30c9\u30d0\u30fc\u30b8\u30e7\u30f3\u30014\u30d0\u30a4\u30c8\u306e\u30d7\u30ec\u30d5\u30a3\u30c3\u30af\u30b9\u3001\u6a19\u7684\u306eIP\u30a2\u30c9\u30ec\u30b9\u3001 \\t (\u30bf\u30d6)\u3067\u533a\u5207\u3089\u308c\u305f\u30c7\u30fc\u30bf\u3001 GetModuleHandleA \u3084 GetProcAddress \u3078\u306e\u30dd\u30a4\u30f3\u30bf\u306a\u3069\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3002 \" width=\"900\" height=\"251\" \/><figcaption id=\"caption-attachment-123953\" class=\"wp-caption-text\">\u56f3 3. \u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30b9\u30ad\u30fc\u30de<\/figcaption><\/figure>\n<p>\u4ee5\u4e0b\u3001\u5fa9\u53f7\u3055\u308c\u305f\u30c7\u30fc\u30bf\u306e\u5404\u30c7\u30fc\u30bf\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u5185\u8a33\u3092\u9806\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u6700\u521d\u306e16\u30d0\u30a4\u30c8\u306fBeacon\u304c\u751f\u6210\u3059\u308b\u30e9\u30f3\u30c0\u30e0\u30d0\u30a4\u30c8\u3067\u3001\u5404\u5b9f\u884c\u30d7\u30ed\u30bb\u30b9\u306b\u56fa\u6709\u3067\u3059\u3002Beacon\u3068TeamServer\u306f\u3053\u306e16\u30d0\u30a4\u30c8\u304b\u3089AES\u9375\u3068HMAC\u9375\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u30d7\u30ed\u30bb\u30b9\u306f\u3053\u308c\u308916\u30d0\u30a4\u30c8\u306eSHA256\u30cf\u30c3\u30b7\u30e5\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002SHA256\u30cf\u30c3\u30b7\u30e5\u306e\u6700\u521d\u306e16\u30d0\u30a4\u30c8\u304c\u5171\u901a\u6697\u53f7\u306eAES\u9375\u3068\u3057\u3066\u5272\u308a\u5f53\u3066\u3089\u308c\u3001\u6b8b\u308a\u306e16\u30d0\u30a4\u30c8\u304c\u30e1\u30c3\u30bb\u30fc\u30b8\u8a8d\u8a3c\u30b3\u30fc\u30c9\u7528\u306eHMAC\u9375\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li>\u6b21\u306e\u30ea\u30c8\u30eb\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306e2\u30d0\u30a4\u30c8\u306fANSI\u6587\u5b57\u30bb\u30c3\u30c8\u3068\u3057\u3066\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002\u6587\u5b57\u30bb\u30c3\u30c8\u306e\u5168\u30ea\u30b9\u30c8\u306b\u3064\u3044\u3066\u306f<a href=\"https:\/\/docs.microsoft.com\/ja-jp\/windows\/win32\/intl\/code-page-identifiers\">\u30b3\u30fc\u30c9\u30da\u30fc\u30b8\u8b58\u5225\u5b50<\/a>\u306b\u95a2\u3059\u308b\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u305d\u306e\u6b21\u306e\u30ea\u30c8\u30eb\u30a8\u30f3\u30c7\u30a3\u30a2\u30f32\u30d0\u30a4\u30c8\u306fOEM\u6587\u5b57\u30bb\u30c3\u30c8\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>4\u30d0\u30a4\u30c8\u306e\u30d3\u30c3\u30b0\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306fBeacon ID\u3067\u3001\u5404Beacon\u306b\u306f\u4e00\u610f\u306aID\u304c\u4e0e\u3048\u3089\u308c\u307e\u3059\u3002<\/li>\n<li>4\u30d0\u30a4\u30c8\u306e\u30d3\u30c3\u30b0\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306f\u88ab\u5bb3\u30de\u30b7\u30f3\u4e0a\u3067\u7a3c\u50cd\u3059\u308bBeacon\u306e\u30d7\u30ed\u30bb\u30b9ID\u3067\u3059\u3002<\/li>\n<li>2\u30d0\u30a4\u30c8\u306f\u30dd\u30fc\u30c8\u3068\u3057\u3066\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>1\u30d0\u30a4\u30c8\u306f\u30d5\u30e9\u30b0\u3068\u3057\u3066\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002\u73fe\u5728\u306eCobalt Strike\u306e\u5b9f\u88c5\u3067\u306f\u3001\u3053\u306e\u30d5\u30e9\u30b0\u306e\u5024\u3067Beacon\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3(32\u30d3\u30c3\u30c8\/64\u30d3\u30c3\u30c8)\u3092\u8a2d\u5b9a\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li>2\u30d0\u30a4\u30c8\u304cBeacon\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u756a\u53f7\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30d0\u30a4\u30c8\u306f\u9593\u306b\u300c.\u300d\u3092\u633f\u5165\u3057\u305f\u6587\u5b57\u5217\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002\u4f8b: <span style=\"font-family: 'courier new', courier, monospace;\">A.B<\/span><\/li>\n<li>2\u30d0\u30a4\u30c8\u306fBeacon\u306e\u30d3\u30eb\u30c9\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u3057\u3066\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>\u6b21\u306e4\u30d0\u30a4\u30c8\u306e\u30d3\u30c3\u30b0\u30a8\u30f3\u30c7\u30a3\u30a2\u30f3\u306e\u5024\u306f\u95a2\u6570\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3092\u30d7\u30ec\u30d5\u30a3\u30af\u30b9\u3059\u308b\u306e\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059(Beacon\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u304c64\u30d3\u30c3\u30c8\u306e\u5834\u5408)\u3002\u3053\u308c\u30894\u30d0\u30a4\u30c8\u306f32\u30d3\u30c3\u30c8\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u5834\u5408\u306f\u7834\u68c4\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>\u7d9a\u304f2\u3064\u306e4\u30d0\u30a4\u30c8\u5024\u306f<span style=\"font-family: 'courier new', courier, monospace;\">GetModuleHandleA<\/span>\u3068<span style=\"font-family: 'courier new', courier, monospace;\">GetProcAddress<\/span>\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u5024\u3092\u4f7f\u3046\u3053\u3068\u3067\u30b7\u30a7\u30eb\u30b3\u30fc\u30c9\u306f\u660e\u793a\u7684\u306b\u30a4\u30f3\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u306a\u3044\u95a2\u6570\u3092\u89e3\u6c7a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002Beacon\u304c64\u30d3\u30c3\u30c8\u306e\u5834\u5408\u306f\u5148\u306e\u5024\u306b\u30d7\u30ec\u30d5\u30a3\u30af\u30b9\u3092\u4ed8\u3051\u305f\u7d50\u679c\u306e\u5024\u5168\u4f53\u304c\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>\u6b21\u306e4\u30d0\u30a4\u30c8\u306f\u6a19\u7684\u306eIP\u30a2\u30c9\u30ec\u30b9\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u30d0\u30a4\u30c8\u306f\u5f8c\u3067IPv4\u3068\u3057\u3066\u8aad\u307f\u53d6\u308a\u53ef\u80fd\u306a\u30a2\u30c9\u30ec\u30b9\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>\u6700\u5f8c\u306e\u30d0\u30a4\u30c8\u5217\u306fUTF-8\u3067\u3001\u3053\u306e\u5024\u306f\u300c<span style=\"font-family: 'courier new', courier, monospace;\">\\t<\/span>\u300d\u3067\u533a\u5207\u3089\u308c\u307e\u3059\u3002\u73fe\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u3053\u306e\u30c7\u30fc\u30bf\u306f\u300c<span style=\"font-family: 'courier new', courier, monospace;\">ComputerName\\tUserName\\tBeaconProcessName<\/span>\u300d\u3068\u3044\u3046\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2><a id=\"post-123996-_qssyqy1vf3pd\"><\/a><strong>\u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u306e\u751f\u6210\u30fb\u62bd\u51fa<\/strong><\/h2>\n<p>Beacon\u306f\u30c1\u30a7\u30c3\u30af\u30a4\u30f3\u3059\u308b\u3055\u3044\u3001RSA\u516c\u958b\u9375\u3067\u6697\u53f7\u5316\u3057\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306eBlob\u3092TeamServer\u306b\u9001\u4fe1\u3057\u307e\u3059\u3002TeamServer\u306f\u3053\u308c\u3092\u79d8\u5bc6\u9375\u3067\u5fa9\u53f7\u3057\u3066\u5e73\u6587\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u5fa9\u5143\u3057\u3001\u3053\u306e\u5f8c\u306e\u901a\u4fe1\u3067\u4f7f\u3046\u307b\u304b\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u3068AES\u9375\u3068\u3092\u62bd\u51fa\u3057\u307e\u3059\u3002AES\u9375\u306f\u89e3\u8aad\u304c\u6975\u3081\u3066\u56f0\u96e3\u306a\u516c\u958b\u9375\u6697\u53f7\u3067\u6697\u53f7\u5316\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u3053\u308c\u3067MitM\u653b\u6483(\u4e2d\u9593\u8005\u653b\u6483)\u3084\u691c\u51fa\u3092\u56de\u907f\u3067\u304d\u307e\u3059\u3002\u3055\u3089\u306b\u3001C2\u901a\u4fe1\u306f\u5171\u901a\u9375\u3067\u6697\u53f7\u5316\u3055\u308c\u308b\u306e\u3067\u30de\u30fc\u30ab\u30fc\u306b\u4f7f\u3048\u308b\u30d5\u30a3\u30f3\u30ac\u30fc\u30d7\u30ea\u30f3\u30c8\u3092\u898b\u3064\u3051\u308b\u306e\u304c\u96e3\u3057\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d7\u30ed\u30d5\u30a1\u30a4\u30eb\u3092\u30ed\u30fc\u30c9\u3057\u3066\u8d77\u52d5\u3057\u305fTeamServer\u306f\u3001\u516c\u958b\u9375\u3068\u79d8\u5bc6\u9375\u306e\u9375\u30da\u30a2\u3092\u751f\u6210\u3057\u3001\u305d\u308c\u3089\u3092TeamServer\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e<span style=\"font-family: 'courier new', courier, monospace;\">.cobaltstrike.beacon_keys<\/span>\u30d5\u30a1\u30a4\u30eb\u306b\u683c\u7d0d\u3057\u307e\u3059(\u30d5\u30a1\u30a4\u30eb\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408)\u3002<\/p>\n<p>\u3053\u306e\u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u306f\u3001GitHub\u3067\u5171\u6709\u3055\u308c\u3066\u3044\u308b<a href=\"https:\/\/gist.github.com\/olliencc\/af056560e943bafa145120103a0947a3#file-dump-java\">\u9375\u3092\u30c0\u30f3\u30d7\u3059\u308bJava\u30d7\u30ed\u30b0\u30e9\u30e0<\/a>\u3092\u4f7f\u3046\u3068\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002\u305d\u306e\u65b9\u6cd5\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>1. \u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u30da\u30a2\u306f<span style=\"font-family: 'courier new', courier, monospace;\">.cobaltstrike.beacon_keys<\/span>\u306b<a href=\"https:\/\/docs.oracle.com\/javase\/7\/docs\/api\/java\/security\/KeyPair.html\">java.security.KeyPair<\/a>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059(\u56f34\u53c2\u7167)\u3002<\/p>\n<figure id=\"attachment_123955\" aria-describedby=\"caption-attachment-123955\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123955 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-67.png\" alt=\"\u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u30da\u30a2\u306f.cobaltstrike.beacon_keys\u306bjava.security.KeyPair\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u683c\u7d0d\u3055\u308c\u3066\u3044\u307e\u3059\u3002\" width=\"900\" height=\"420\" \/><figcaption id=\"caption-attachment-123955\" class=\"wp-caption-text\">\u56f3 4. \u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u30da\u30a2\u306eJava\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/figcaption><\/figure>\n<p>2. TeamServer\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3067\u56f35\u306eJava\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5b9f\u884c\u3059\u308b\u3068\u3001\u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u306e\u30da\u30a2\u304cbase64\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123957\" aria-describedby=\"caption-attachment-123957\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123957 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-68.png\" alt=\"TeamServer\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3067\u3053\u306e\u56f3\u306eJava\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u5b9f\u884c\u3059\u308b\u3068\u3001\u516c\u958b\u9375\/\u79d8\u5bc6\u9375\u306e\u30da\u30a2\u304cbase64\u3067\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002 \" width=\"900\" height=\"103\" \/><figcaption id=\"caption-attachment-123957\" class=\"wp-caption-text\">\u56f3 5. \u516c\u958b\u9375\/\u79d8\u5bc6\u9375<\/figcaption><\/figure>\n<h2><a id=\"post-123996-_ul13omw62lhd\"><\/a><strong>RSA\u3068AES\u306b\u3088\u308bC2\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\/\u5fa9\u53f7\u306e\u4e00\u4f8b<\/strong><\/h2>\n<p>\u4ee5\u4e0b\u306b\u4f8b\u3092\u3042\u3052\u3001Cobalt Strike Beacon\u306e\u30e1\u30bf\u30c7\u30fc\u30bf\u3084C2\u306eHTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u901a\u4fe1\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u5206\u6790\u3067\u306f<a href=\"https:\/\/www.virustotal.com\/gui\/file\/50ea11254f184450a7351d407fbb53c54686ce1e62e99c0a41ee7ee3e505d60c\">VirusTotal\u304b\u3089\u76f4\u63a5<\/a>\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u53ef\u80fd\u306a\u5b9f\u30b5\u30f3\u30d7\u30eb(SHA256\uff1a<span style=\"font-family: 'courier new', courier, monospace;\">50ea11254f184450a7351d407fbb53c54686ce1e62e99c0a41e7e3e505d60c<\/span>)\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u306eC2\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u5206\u6790\u306f\u6b21\u306e3\u3064\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u5206\u304b\u308c\u307e\u3059\u3002<\/p>\n<ol>\n<li><a href=\"#post-123996-_75wnufm959pp\">Cobalt Strike Beacon\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/a><\/li>\n<li><a href=\"#post-123996-_zqx24k7cw21\">C2 Beacon\u30cf\u30fc\u30c8\u30d3\u30fc\u30c8<\/a><\/li>\n<li><a href=\"#post-123996-_oupyfgc0n9to\">C2\u306e\u30bf\u30b9\u30af\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u30ec\u30b9\u30dd\u30f3\u30b9(\u30b3\u30fc\u30eb\u30d0\u30c3\u30af)<\/a><\/li>\n<\/ol>\n<p>\u3053\u308c\u30893\u3064\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u6697\u53f7\u5316\/\u5fa9\u53f7\u306e\u5206\u6790\u306b\u3088\u308a\u6b21\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li>RSA\u516c\u958b\u9375\u3068<a href=\"https:\/\/github.com\/DidierStevens\/DidierStevensSuite\/blob\/master\/1768.json\">\u6f0f\u3048\u3044\u3057\u305f\u79d8\u5bc6\u9375<\/a>\u3092\u4f7f\u3063\u3066<a href=\"#post-123996-_6srcrvxg3b1c\">\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u5fa9\u53f7<\/a>\u3057\u3001AES\u9375\u3068HMAC\u9375\u3092\u53d6\u5f97\u3059\u308b<\/li>\n<li>AES\u9375\u3092\u4f7f\u3063\u3066HTTP GET\u30ec\u30b9\u30dd\u30f3\u30b9\u5185\u306e\u6697\u53f7\u5316\u3055\u308c\u305f<a href=\"#post-123996-_21gkjr77362t\">\u30bf\u30b9\u30af\u30c7\u30fc\u30bf\u3092\u5fa9\u53f7<\/a>\u3059\u308b<\/li>\n<li>AES\u9375\u3092\u4f7f\u3063\u3066HTTP POST\u30ea\u30af\u30a8\u30b9\u30c8\u30dc\u30c7\u30a3\u5185\u306e<a href=\"#post-123996-_tw28phuzroyh\">\u30bf\u30b9\u30af\u5b9f\u884c\u7d50\u679c\u3092\u5fa9\u53f7<\/a>\u3059\u308b<\/li>\n<\/ol>\n<h3><a id=\"post-123996-_75wnufm959pp\"><\/a>Cobalt Strike Beacon\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/h3>\n<figure id=\"attachment_123959\" aria-describedby=\"caption-attachment-123959\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123959 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-69.png\" alt=\"\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306fBeacon\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u306eWireshark pcap\u3067\u3059\u3002 \" width=\"900\" height=\"559\" \/><figcaption id=\"caption-attachment-123959\" class=\"wp-caption-text\">\u56f3 6. Beacon\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/figcaption><\/figure>\n<p><a href=\"https:\/\/blog.didierstevens.com\/programs\/cobalt-strike-tools\/\">1768.py<\/a>\u3068\u3044\u3046\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u8a2d\u5b9a\u3092\u30d1\u30fc\u30b9\u3059\u308b\u3068\u3001\u3053\u306eBeacon\u306fRSA\u79d8\u5bc6\u9375\u304c\u6f0f\u3048\u3044\u3057\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u306eCobalt Strike\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u751f\u6210\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123961\" aria-describedby=\"caption-attachment-123961\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123961 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-70.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306f\u3001RSA\u79d8\u5bc6\u9375\u3092\u6f0f\u6d29\u3057\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u306eCobalt Strike\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u3088\u3063\u3066Beacon\u304c\u751f\u6210\u3055\u308c\u305f\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002 \" width=\"900\" height=\"297\" \/><figcaption id=\"caption-attachment-123961\" class=\"wp-caption-text\">\u56f3 7. Beacon\u306e\u30d1\u30fc\u30b9\u3068\u79d8\u5bc6\u9375\u306e\u691c\u7d22<\/figcaption><\/figure>\n<h3><a id=\"post-123996-_zqx24k7cw21\"><\/a>C2 Beacon\u30cf\u30fc\u30c8\u30d3\u30fc\u30c8<\/h3>\n<p>Beacon\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3068\u5b9f\u884c\u5f8c\u306fTeamServer\u3078\u306eC2\u30c1\u30a7\u30c3\u30af\u30a4\u30f3\u304c\u884c\u308f\u308c\u3001HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306eCookie\u306b\u611f\u67d3\u30de\u30b7\u30f3\u306b\u95a2\u3059\u308b\u6697\u53f7\u5316\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u60c5\u5831\u304c\u6f0f\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123963\" aria-describedby=\"caption-attachment-123963\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123963 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-71.png\" alt=\"\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306fWireshark\u306epcap\u3067\u3059\u3002Beacon\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3068\u5b9f\u884c\u5f8c\u306fTeamServer\u3078\u306eC2\u30c1\u30a7\u30c3\u30af\u30a4\u30f3\u304c\u884c\u308f\u308c\u3001HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306eCookie\u306b\u611f\u67d3\u30de\u30b7\u30f3\u306b\u95a2\u3059\u308b\u6697\u53f7\u5316\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u60c5\u5831\u304c\u6f0f\u51fa\u3055\u308c\u307e\u3059\u3002 \" width=\"900\" height=\"527\" \/><figcaption id=\"caption-attachment-123963\" class=\"wp-caption-text\">\u56f3 8. C2 \u30cf\u30fc\u30c8\u30d3\u30fc\u30c8<\/figcaption><\/figure>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">cs-crypto-parser.py<\/span>\u30b9\u30af\u30ea\u30d7\u30c8(<span style=\"font-family: 'courier new', courier, monospace;\"><a href=\"https:\/\/github.com\/DidierStevens\/AdHoc\/blob\/master\/cs-mitm.py\">cs-mitm.py<\/a><\/span>\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u82e5\u5e72\u4fee\u6b63\u3057\u305f\u30d0\u30fc\u30b8\u30e7\u30f3)\u3092\u5b9f\u884c\u3057\u3066\u30e1\u30bf\u30c7\u30fc\u30bf\u60c5\u5831\u3092\u5fa9\u53f7\u3057\u307e\u3059\u3002\u3053\u306e\u3055\u3044Cookie\u304b\u3089\u306e\u5024(<span style=\"font-family: 'courier new', courier, monospace;\">XjaoBxbLchqKBL\/s\/m8Pgz\/wHRbx660\/2Aa8Toa9T\/AJ0Ns8mgjPBWdYIL9mEFM1DE\/5GXGCSURf6RP+wxo5Zx0G\/yENlMTuzPaCO11\/XPNxRj69Nf6++05qe7iMKfg8D4ZFGiEQAVo6UXqUteZlAqubJ+uNZBglsyioa+aSQw=<\/span>)\u3092\u7b2c\u4e00\u5f15\u6570\u3068\u3057\u3066\u6e21\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h4><a id=\"post-123996-_6srcrvxg3b1c\"><\/a>RSA\u306e\u5fa9\u53f7<\/h4>\n<p>\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5b9f\u884c\u3059\u308b\u6700\u521d\u306e\u30bf\u30b9\u30af\u306f\u30d1\u30e9\u30e1\u30fc\u30bf\u30922\u3064\u53d7\u3051\u53d6\u308b<span style=\"font-family: 'courier new', courier, monospace;\">RSADecrypt()<\/span>\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u3067\u3059\u30021\u3064\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u79d8\u5bc6\u9375\u30012\u3064\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u6697\u53f7\u5316\u3055\u308c\u305f<span style=\"font-family: 'courier new', courier, monospace;\">Cookie<\/span>\u306e\u5024\u3067\u3059\u3002\u3053\u306e\u30bf\u30b9\u30af\u304c\u5b8c\u4e86\u3059\u308b\u3068RSA\u79d8\u5bc6\u9375\u3092\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3001\u65b0\u305f\u306aPKCS1\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306f<span style=\"font-family: 'courier new', courier, monospace;\">decrypt<\/span>\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u5909\u6570\u3092\u5f15\u6570\u3068\u3057\u3066\u3053\u306e\u95a2\u6570\u306b\u6e21\u3057\u3001\u6697\u53f7\u6587\u306e\u5fa9\u53f7\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123965\" aria-describedby=\"caption-attachment-123965\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123965 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-72.png\" alt=\"2 \u3064\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u53d7\u3051\u53d6\u308bRSADecrypt()\u95a2\u6570\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u30021\u3064\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u79d8\u5bc6\u9375\u30012\u3064\u3081\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306f\u6697\u53f7\u5316\u3055\u308c\u305fCookie\u306e\u5024\u3002 \" width=\"900\" height=\"192\" \/><figcaption id=\"caption-attachment-123965\" class=\"wp-caption-text\">\u56f3 9. RSADecrypt()\u95a2\u6570<\/figcaption><\/figure>\n<p>\u51fa\u529b\u7d50\u679c\u3068\u3057\u3066\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u8a73\u7d30\u306a\u5185\u8a33\u304c16\u9032\u6570\u5024\u3068\u3068\u3082\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123967\" aria-describedby=\"caption-attachment-123967\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123967 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-73.png\" alt=\"\u51fa\u529b\u7d50\u679c\u3068\u3057\u3066\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u8a73\u7d30\u306a\u5185\u8a33\u304c16\u9032\u6570\u5024\u3068\u3068\u3082\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002 \" width=\"900\" height=\"552\" \/><figcaption id=\"caption-attachment-123967\" class=\"wp-caption-text\">\u56f3 10. C2\u306e\u5fa9\u53f7\u3057\u305f\u30e1\u30bf\u30c7\u30fc\u30bf<\/figcaption><\/figure>\n<p>\u5fa9\u53f7\u3055\u308c\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u69cb\u9020\u306b\u3064\u3044\u3066\u306f\u672c\u7a3f\u306e\u300c<a href=\"#post-123996-_aubaskmy983x\">\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u30b9\u30ad\u30fc\u30de\u5b9a\u7fa9<\/a>\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3><a id=\"post-123996-_oupyfgc0n9to\"><\/a>C2\u306e\u30bf\u30b9\u30af\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u30ec\u30b9\u30dd\u30f3\u30b9(\u30b3\u30fc\u30eb\u30d0\u30c3\u30af)<\/h3>\n<h4><a id=\"post-123996-_nz9rreq7b8i7\"><\/a>AES\u9375\u3068HMAC\u9375<\/h4>\n<p>\u30da\u30a4\u30ed\u30fc\u30c9\u306fCBC\u30e2\u30fc\u30c9\u306eAES-256\u6697\u53f7\u306bHMAC-SHA-256\u9375\u4ed8\u304d\u30cf\u30c3\u30b7\u30e5\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u6307\u5b9a\u3057\u3066\u6697\u53f7\u5316\u3055\u308c\u307e\u3059\u3002RSA\u79d8\u5bc6\u9375\u3084\u5fa9\u53f7\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u3042\u308b\u306e\u3067\u3053\u308c\u306b\u306f\u751f\u306e\u9375\u3082\u542b\u307e\u308c\u307e\u3059\u3002\u3053\u306e\u9375\u306f16\u30d0\u30a4\u30c8\u3067\u3001\u5fa9\u53f7\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u306e8\u30d0\u30a4\u30c8\u76ee\u306b\u4f4d\u7f6e\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u30b5\u30f3\u30d7\u30eb\u306e\u5834\u5408\u3001\u9375\u306f<span style=\"font-family: 'courier new', courier, monospace;\">1a 13 7e 76 f9 15 6a 67 f9 99 af d6 57 64 75 bd<\/span>\u3067\u3059(16\u9032\u6570\u8868\u8a18)\u3002AES\u9375\u3068HMAC\u9375\u3092\u751f\u6210\u3059\u308b\u305f\u3081\u751f\u306e\u9375\u304b\u3089SHA256\u30cf\u30c3\u30b7\u30e5\u304c\u8a08\u7b97\u3055\u308c\u307e\u3059\u304c\u3001\u8a08\u7b97\u3055\u308c\u305f\u7d50\u679c\u306f\u3001\u524d\u534a(16\u30d0\u30a4\u30c8)\u304c\u5b9f\u969b\u306eAES\u9375\u3067\u5f8c\u534a(16\u30d0\u30a4\u30c8)\u304cHMAC\u9375\u306b\u306a\u308a\u307e\u3059\u3002\u4e0b\u306e\u56f311\u306fcrypto-parser\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5b9f\u884c\u3057\u305f\u3055\u3044\u306e\u8a08\u7b97\u306e\u69d8\u5b50\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_123969\" aria-describedby=\"caption-attachment-123969\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123969 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-74.png\" alt=\"\u9ec4\u8272\u306e\u77e9\u5f62\u3067\u3053\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u30b5\u30f3\u30d7\u30eb\u306b\u542b\u307e\u308c\u308bSHA-256\u30c0\u30a4\u30b8\u30a7\u30b9\u30c8\u3092\u30cf\u30a4\u30e9\u30a4\u30c8\u8868\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u8d64\u3067\u56f2\u3063\u305f\u90e8\u5206\u304cAES\u9375\u3067\u9752\u3067\u56f2\u3063\u305f\u90e8\u5206\u304cHMAC\u9375\u3067\u3059\u3002\u3053\u308c\u30892\u3064\u3092\u5408\u308f\u305b\u3066\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u306e\u30cf\u30c3\u30b7\u30e5\u3068\u9375\u3092\u69cb\u6210\u3057\u3066\u3044\u307e\u3059\u3002\" width=\"900\" height=\"323\" \/><figcaption id=\"caption-attachment-123969\" class=\"wp-caption-text\">\u56f3 11. \u6697\u53f7\u5316\/\u5fa9\u53f7\u306e\u30cf\u30c3\u30b7\u30e5\u3068\u9375<\/figcaption><\/figure>\n<h4><a id=\"post-123996-_21gkjr77362t\"><\/a>C2\u30bf\u30b9\u30af\u30ea\u30af\u30a8\u30b9\u30c8<\/h4>\n<p>C2\u30c1\u30e3\u30f3\u30cd\u30eb\u304c\u78ba\u7acb\u3055\u308c\u3066\u30c1\u30a7\u30c3\u30af\u30a4\u30f3\u304c\u884c\u308f\u308c\u308b\u3068\u3001Beacon\u306f\u30c1\u30a7\u30c3\u30af\u3084\u65b0\u3057\u3044\u30bf\u30b9\u30af\u306e\u5b9f\u884c\u3092\u884c\u3044\u307e\u3059\u3002\u56f312\u306f\u3001\u30bf\u30b9\u30af\u30ea\u30af\u30a8\u30b9\u30c8\u304cTeamServer\u304b\u3089\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u53d7\u4fe1\u3057\u305f\u69d8\u5b50\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123971\" aria-describedby=\"caption-attachment-123971\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123971 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-75.png\" alt=\"\u3053\u306eWireshark\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u306f\u3001HTTP GET\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002 \" width=\"900\" height=\"614\" \/><figcaption id=\"caption-attachment-123971\" class=\"wp-caption-text\">\u56f3 12. C2\u306e\u30bf\u30b9\u30af\u30ea\u30af\u30a8\u30b9\u30c8(\u53d6\u5f97)<\/figcaption><\/figure>\n<p>\u3053\u3053\u306748\u30d0\u30a4\u30c8\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u30c7\u30fc\u30bf\u3092\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u6e21\u3057\u3066\u5fa9\u53f7\u3057\u307e\u3059\u3002\u6697\u53f7\u5316\u3055\u308c\u305fBlob\u306e\u6700\u5f8c\u306e16\u30d0\u30a4\u30c8\u306fHMAC Signature\u3067\u3001\u3053\u308c\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u5b8c\u5168\u6027\u306e\u57fa\u6e96\u3068\u3057\u3066\u7528\u3044\u3089\u308c\u307e\u3059\u3002\u56f313\u306f\u3001\u30bf\u30b9\u30af\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u30c7\u30fc\u30bf\u3092\u30d1\u30fc\u30b9\u3057\u3066\u5fa9\u53f7\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_123973\" aria-describedby=\"caption-attachment-123973\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123973 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-76.png\" alt=\"\u30bf\u30b9\u30af\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u30c7\u30fc\u30bf\u3092\u30d1\u30fc\u30b9\u3057\u3066\u5fa9\u53f7\u3057\u305f\u3082\u306e\u3092\u8868\u793aHMAC Signature\u306f\u9ec4\u8272\u306e\u67a0\u3067\u56f2\u308f\u308c\u305f\u90e8\u5206 \" width=\"900\" height=\"329\" \/><figcaption id=\"caption-attachment-123973\" class=\"wp-caption-text\">\u56f3 13. Cobalt Strike\u306e\u30bf\u30b9\u30af \u30ea\u30af\u30a8\u30b9\u30c8 \u30da\u30a4\u30ed\u30fc\u30c9\u306e\u5fa9\u53f7<\/figcaption><\/figure>\n<p>\u5fa9\u53f7\u51e6\u7406\u3092\u62c5\u3063\u3066\u3044\u308b\u306e\u304c<span style=\"font-family: 'courier new', courier, monospace;\">Decrypt()<\/span>\u95a2\u6570\u3067\u3001\u3053\u306e\u95a2\u6570\u304c\u4ee5\u4e0b\u306e\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u53d7\u3051\u53d6\u308b<\/li>\n<li>\u6697\u53f7\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u304b\u3089HMAC Signature\u3092\u62bd\u51fa\u3059\u308b<\/li>\n<li>\u6697\u53f7\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u306eHMAC\u9375\u3092\u4f7f\u3063\u3066HMAC Signature\u3092\u8a08\u7b97\u30fb\u691c\u8a3c\u3059\u308b<\/li>\n<li>AES\u9375\u3092\u30ed\u30fc\u30c9\u3057\u3066\u30e2\u30fc\u30c9(CBC)\u3068\u521d\u671f\u5316\u30d9\u30af\u30c8\u30eb(IV)\u3092\u8a2d\u5b9a\u3059\u308b<\/li>\n<li>\u6697\u53f7\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u5fa9\u53f7\u3059\u308b<\/li>\n<\/ol>\n<figure id=\"attachment_123975\" aria-describedby=\"caption-attachment-123975\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123975 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-77.png\" alt=\"Decrypt()\u95a2\u6570\u306e\u5185\u5bb9\u3002\u3053\u306e\u95a2\u6570\u306f\u6697\u53f7\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u53d7\u3051\u53d6\u308a\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u304b\u3089HMAC Signature\u3092\u62bd\u51fa\u3057\u3001\u6697\u53f7\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u306bHMAC\u9375\u3092\u7528\u3044\u3066HMAC Signature\u3092\u8a08\u7b97\u30fb\u691c\u8a3c\u3057\u3001AES\u9375\u3092\u30ed\u30fc\u30c9\u3057\u3066\u30e2\u30fc\u30c9\u3068\u305d\u306e\u521d\u671f\u5316\u30d9\u30af\u30c8\u30eb\u3092\u8a2d\u5b9a\u3057\u3001\u6697\u53f7\u5316\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u5fa9\u53f7\u3059\u308b\u3002 \" width=\"900\" height=\"248\" \/><figcaption id=\"caption-attachment-123975\" class=\"wp-caption-text\">\u56f3 14. AES\/HMAC\u5fa9\u53f7\u95a2\u6570<\/figcaption><\/figure>\n<h4><a id=\"post-123996-_tw28phuzroyh\"><\/a>C2\u30bf\u30b9\u30af\u30ec\u30b9\u30dd\u30f3\u30b9<\/h4>\n<p>Beacon\u304cC2\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u306e\u30bf\u30b9\u30af\u3092\u53d7\u3051\u3068\u3063\u3066\u5b9f\u884c\u3059\u308b\u3068\u3001\u305d\u306e\u7d50\u679c\u304c\u53ce\u96c6\u3055\u308c\u3066TeamServer\u306b\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123977\" aria-describedby=\"caption-attachment-123977\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123977 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-78.png\" alt=\"HTTP POST\u30ea\u30af\u30a8\u30b9\u30c8\u306eWireshark\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 \" width=\"900\" height=\"616\" \/><figcaption id=\"caption-attachment-123977\" class=\"wp-caption-text\">\u56f3 15. Cobalt Strike\u306e\u30bf\u30b9\u30af\u30ec\u30b9\u30dd\u30f3\u30b9(\u30c7\u30fc\u30bf\u306e\u6f0f\u51fa)<\/figcaption><\/figure>\n<p>\u4e0a\u8a18\u3068\u540c\u3058<span style=\"font-family: 'courier new', courier, monospace;\">Decrypt()<\/span>\u95a2\u6570\u3092\u4f7f\u3063\u3066\u6697\u53f7\u5316\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u304c\u63d0\u4f9b\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001Cobalt Strike\u306e\u30bf\u30b9\u30af\u30ec\u30b9\u30dd\u30f3\u30b9\u3067\u306f\u6700\u521d\u306e4\u30d0\u30a4\u30c8\u304c\u5fa9\u53f7\u5bfe\u8c61\u306b\u306a\u3089\u305a\u3001\u95a2\u6570\u306b\u6e21\u3055\u308c\u308b\u30c7\u30fc\u30bf\u304b\u3089\u306f\u3053\u308c\u30894\u30d0\u30a4\u30c8\u304c\u9664\u5916\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_123979\" aria-describedby=\"caption-attachment-123979\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-123979 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/07\/word-image-79.png\" alt=\"Cobalt Strike\u306e\u30bf\u30b9\u30af\u30ec\u30b9\u30dd\u30f3\u30b9\u3002\u30ab\u30a6\u30f3\u30bf\u3092\u9752\u3001\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u3092\u9ec4\u3001\u30bf\u30a4\u30d7\u3092\u8d64\u3001\u30bf\u30b9\u30af\u30c7\u30fc\u30bf\u3092\u30aa\u30ec\u30f3\u30b8\u3067\u56f2\u3063\u3066\u793a\u3059\u3002 \" width=\"900\" height=\"353\" \/><figcaption id=\"caption-attachment-123979\" class=\"wp-caption-text\">\u56f3 16. Cobalt Strike\u306e\u30bf\u30b9\u30af\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u5fa9\u53f7<\/figcaption><\/figure>\n<p>\u3053\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u542b\u307e\u308c\u308b\u30bf\u30b9\u30af\u30c7\u30fc\u30bf\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u306f\u3001ASCII\u6587\u5b57\u5217<span style=\"font-family: 'courier new', courier, monospace;\">BOBSPC\\\\Administrator<\/span>\u3067\u3001\u611f\u67d3\u3057\u305f\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u30de\u30b7\u30f3\u540d\u3068\u30e6\u30fc\u30b6\u30fc\u540d\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-123996-_eijf9lk8gvyu\"><\/a>\u7d50\u8ad6<\/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\u5148\u306b\u8aac\u660e\u3057\u305f\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\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\u672c\u7a3f\u3067\u8aac\u660e\u3057\u305fCobalt Strike\u306e\u653b\u6483\u540c\u69d8\u306e\u653b\u6483\u304b\u3089\u6b21\u306e\u65b9\u6cd5\u3067\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\u3002Advanced Threat Prevention\u306b\u306f\u3001\u30b7\u30b0\u30cd\u30c1\u30e3\u306b\u983c\u3089\u305a\u306b\u3053\u308c\u3089\u306e\u653b\u6483\u3092\u691c\u77e5\u3059\u308b\u65b0\u6a5f\u80fd\u304c\u3042\u308a\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=\"post-123996-_v8176g40kstn\"><\/a><strong>IoC (\u4fb5\u5bb3\u6307\u6a19)<\/strong><\/h2>\n<h3><a id=\"post-123996-_763h15eckspk\"><\/a>Cobalt Strike \u30b5\u30f3\u30d7\u30eb<\/h3>\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">50ea11254f184450a7351d407fbb53c54686ce1e62e99c0a41ee7ee3e505d60c<\/span><\/li>\n<\/ul>\n<h3><a id=\"post-123996-_u7f7n141ag7e\"><\/a>Cobalt Strike Beacon \u30b5\u30f3\u30d7\u30eb<\/h3>\n<ul>\n<li>\/lNj8\n<ul>\n<li>SHA256\u30cf\u30c3\u30b7\u30e5:\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">e712d670382ad6f837feeb5a66adb2d0f133481b5db854de0dd4636d7e906a8e<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3><a id=\"post-123996-_t06djbjund6r\"><\/a>Cobalt Strike TeamServer\u306eIP\u30a2\u30c9\u30ec\u30b9<\/h3>\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">92.255.85[.]93<\/span><\/li>\n<\/ul>\n<h2><a id=\"post-123996-_570cbe1pdhwx\"><\/a><strong>\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/strong><\/h2>\n<ul>\n<li><a href=\"https:\/\/www.cobaltstrike.com\/training\">Cobalt Strike Training (Cobalt Strike\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0)<\/a><\/li>\n<li><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><\/li>\n<li><a href=\"https:\/\/blog.nviso.eu\/2021\/10\/21\/cobalt-strike-using-known-private-keys-to-decrypt-traffic-part-1\/\">Cobalt Strike Decryption with Known Private Key (Cobalt Strike\u3092\u65e2\u77e5\u306e\u79d8\u5bc6\u9375\u3067\u5fa9\u53f7\u3059\u308b)<\/a><\/li>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/cobalt-strike-malleable-c2-profile\/\">Cobalt Strike\u89e3\u6790\u30fb\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><\/li>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/cobalt-strike-metadata-encoding-decoding\/\">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<\/a><\/li>\n<li><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><\/li>\n<\/ul>\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\u90e8TeamServer\u3068\u901a\u4fe1\u3057\u3066\u30b3\u30de\u30f3\u30c9\uff06\u30b3\u30f3\u30c8<\/p>\n","protected":false},"author":347,"featured_media":134292,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4438,4435,4428],"tags":[4843,4899,5381,4869,5383],"product_categories":[],"coauthors":[2423,1360,2479,845,1726],"class_list":["post-123996","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-post-exploitation-ja"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Cobalt Strike\u89e3\u6790&amp;\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb: Cobalt Strike\u306b\u3088\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u3068\u5fa9\u53f7<\/title>\n<meta name=\"description\" content=\"Cobalt Strike\u306b\u3088\u308b\u30e1\u30bf\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u30fb\u5fa9\u53f7\u51e6\u7406\u3092\u5b9f\u30b5\u30f3\u30d7\u30eb\u3092\u4f7f\u3063\u3066\u89e3\u8aac\u3059\u308b\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002\u672c\u7a3f\u3067\u306f\u3053\u308c\u3089\u306e\u51e6\u7406\u306b\u3088\u308a\u4fdd\u8b77\u304c\u96e3\u3057\u304f\u306a\u308b\u7406\u7531\u306b\u3064\u3044\u3066\u3082\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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