{"id":118569,"date":"2021-04-15T06:00:38","date_gmt":"2021-04-15T13:00:38","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=118569"},"modified":"2021-04-29T19:04:25","modified_gmt":"2021-04-30T02:04:25","slug":"exchange-server-credential-harvesting","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/exchange-server-credential-harvesting\/","title":{"rendered":"\u653b\u6483\u8005\u306b\u3088\u308bMicrosoft Exchange Server\u306e\u8106\u5f31\u6027\u60aa\u7528\u3067 Cortex XDR\u304c\u8a8d\u8a3c\u60c5\u5831\u306e\u53ce\u96c6\u3092\u9632\u6b62"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u6700\u8fd1\u767a\u898b\u30fb\u4fee\u6b63\u3055\u308c\u305fMicrosoft Exchange\u306e\u8106\u5f31\u6027\uff08<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26855\">CVE-2021-26855<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26857\">CVE-2021-26857<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26858\">CVE-2021-26858<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-27065\">CVE-2021-27065<\/a>\uff09\u306f\u3001\u305d\u306e\u60aa\u7528\u6570\u306e\u591a\u3055\u3068\u305d\u3053\u304b\u3089\u7d44\u7e54\u304c\u88ab\u308b\u5f71\u97ff\u306e\u6df1\u523b\u3055\u304b\u3089\u9ad8\u3044\u6ce8\u76ee\u3092\u96c6\u3081\u3066\u3044\u307e\u3059\u30022021\u5e743\u67086\u65e5\u3001\u672a\u77e5\u306e\u653b\u6483\u8005\u304cMicrosoft Exchange 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href=\"https:\/\/www.paloaltonetworks.jp\/products\/secure-the-network\/subscriptions\/threat-prevention\">\u8105\u5a01\u9632\u5fa1<\/a>\u3001<a href=\"https:\/\/www.paloaltonetworks.jp\/products\/threat-detection-and-prevention\/web-security\">URL\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/a>\u306e\u5404\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3057\u305f<a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/next-generation-firewall\">\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb<\/a>\u3068\u3001<a href=\"https:\/\/www.paloaltonetworks.jp\/cortex\/cortex-xdr\">Cortex XDR<\/a>\u3001<a href=\"https:\/\/www.paloaltonetworks.jp\/cortex\/xsoar\">Cortex XSOAR<\/a>\u306b\u3088\u308aMicrosoft Exchange Server\u3078\u306e\u653b\u6483\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>Web\u30b7\u30a7\u30eb\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3<\/h2>\n<p>2021\u5e743\u670811\u65e5\u306812\u65e5\u3001Unit 42\u306f6\u3064\u306e\u7570\u306a\u308b\u7d44\u7e54\u306eMicrosoft Exchange\u30b5\u30fc\u30d0\u30fc\u4e0a\u306eWeb\u30b7\u30a7\u30eb\u3068\u3084\u308a\u3068\u308a\u3059\u308b\u30a2\u30af\u30bf\u30fc\u3092\u89b3\u6e2c\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u653b\u6483\u306b\u304a\u3051\u308b\u30a2\u30af\u30bf\u30fc\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306b\u3001\u4fb5\u5bb3\u3055\u308c\u305fExchange\u30b5\u30fc\u30d0\u30fc\u306e1\u3064\u304b\u3089\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30a4\u30f3\u30d5\u30a9\u30e1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d3\u30b9\uff08IIS\uff09\u30ed\u30b0\u3092\u5206\u6790\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001Web\u30b7\u30a7\u30eb\u3078\u306e\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9Web\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u3001\u751f\u6210\u3055\u308c\u305f\u95a2\u9023\u30d7\u30ed\u30bb\u30b9\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u89b3\u6e2c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30ed\u30b0\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u4f7f\u7528\u3057\u3066\u3001\u3053\u306e\u7279\u5b9a\u306e\u30a2\u30af\u30bf\u30fc\u3068\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u306b\u95a2\u9023\u3059\u308b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u3092\u3053\u306e\u5206\u6790\u306e\u6b8b\u308a\u306e\u90e8\u5206\u3067\u300c\u653b\u6483\u300d\u3068\u547c\u3073\u307e\u3059\u3002\u56f31\u306f\u30012021\u5e743\u67086\u65e5\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u958b\u59cb\u304b\u3089\u59cb\u307e\u308b\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u3053\u306b\u793a\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u306b\u30012021\u5e743\u670812\u65e5\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u5f8c\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u958b\u59cb\u307e\u3067\u306b\u306f6\u65e5\u9593\u306e\u7a7a\u767d\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_118509\" aria-describedby=\"caption-attachment-118509\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-118510 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/word-image-85.png\" alt=\"\u3053\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3\u306f\u30012021\u5e743\u67086\u65e5\u306b\u89b3\u5bdf\u3055\u308c\u305f\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u958b\u59cb\u304b\u3089\u3001\u6700\u7d42\u7684\u306b\u8a8d\u8a3c\u60c5\u5831\u53ce\u96c6\u306e\u8a66\u307f\u304c\u5931\u6557\u3059\u308b\u307e\u3067\u306e\u904e\u7a0b\u3067\u3001Exchange Server\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u305f\u30a2\u30af\u30bf\u30fc\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u8ffd\u8de1\u3057\u305f\u3082\u306e\u3067\u3059\u3002 \" width=\"900\" height=\"220\" \/><figcaption id=\"caption-attachment-118509\" class=\"wp-caption-text\">\u56f31 Exchange\u30b5\u30fc\u30d0\u30fc\u306b\u95a2\u9023\u4ed8\u3051\u3089\u308c\u305f\u30a2\u30af\u30bf\u30fc\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3<\/figcaption><\/figure>\n<p>\u30ed\u30b0\u306b\u3088\u308b\u3068\u3001\u3053\u306e\u30a2\u30af\u30bf\u30fc\u306f2021\u5e743\u67086\u65e502:38:16\u306bWeb\u30b7\u30a7\u30eb\u3092Exchange\u30b5\u30fc\u30d0\u30fc\u306e<span style=\"font-family: 'courier new', courier, monospace;\">C:\\inetpub\\wwwroot\\aspnet_client\\supp0rt.aspx<\/span>\u306b\u4fdd\u5b58\u3059\u308b\u3053\u3068\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u305fWeb\u30b7\u30a7\u30eb\u3078\u306e\u30d1\u30b9\u306fIIS\u30b5\u30fc\u30d0\u30fc\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u5185\u306b\u5b58\u5728\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u304c\u3001<span style=\"font-family: 'courier new', courier, monospace;\">\/aspnet_client\/supp0rt.aspx<\/span>\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u8a2a\u554f\u8005\u306bWeb\u30b7\u30a7\u30eb\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u306a\u304a<span style=\"font-family: 'courier new', courier, monospace;\">\/aspnet_client\/supp0rt.aspx<\/span>\u3068\u3044\u3046URL\u306f\u3053\u306e\u653b\u6483\u306b\u7279\u6709\u306e\u3082\u306e\u3067\u306f\u306a\u304f\u3001Unit 42\u304c\u4ee5\u524d\u300c<a href=\"https:\/\/blog.paloaltonetworks.com\/security-operations\/attacks-targeting-microsoft-exchange\/?lang=ja\">Microsoft Exchange Server\u3092\u6a19\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u653b\u6483\u306e\u635c\u7d22<\/a>\u300d\u3068\u3044\u3046\u30d6\u30ed\u30b0\u3067\u8ff0\u3079\u305f\u3088\u3046\u306b\u3001Exchange\u95a2\u9023\u306e\u591a\u304f\u306e\u653b\u6483\u3067Web\u30b7\u30a7\u30eb\u306b\u3053\u306eURL\u306e\u4f7f\u7528\u304c\u78ba\u8a8d\u3055\u308c\u3066\u3044\u307e\u3059\u3002<a href=\"https:\/\/us-cert.cisa.gov\/ncas\/analysis-reports\/ar21-072f\">\u6700\u8fd1\u306eCISA\u30ec\u30dd\u30fc\u30c8<\/a>\u306b\u3088\u308b\u3068\u3001Exchange\u95a2\u9023\u306e\u653b\u6483\u3067\u4f7f\u7528\u3055\u308c\u305fsupp0rt.aspx\u306f\u3001\u300cExternalUrl\u300d\u30d5\u30a3\u30fc\u30eb\u30c9\u306bWeb\u30b7\u30a7\u30eb\u306e\u8ffd\u52a0\u3055\u308c\u305f\u30aa\u30d5\u30e9\u30a4\u30f3\u30a2\u30c9\u30ec\u30b9\u30d6\u30c3\u30af\uff08OAB\uff09\u69cb\u6210\u30d5\u30a1\u30a4\u30eb\u3067\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js.png\" rel=\"wpdevart_lightbox\"><img  class=\"aligncenter wp-image-118574 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js.png\" alt=\"JScript\" width=\"878\" height=\"15\" \/><\/a><\/p>\n<p>\u79c1\u305f\u3061\u306f\u3053\u306e\u7279\u5b9a\u306e\u653b\u6483\u3067\u4f7f\u7528\u3055\u308c\u305f<span style=\"font-family: 'courier new', 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new', courier, monospace;\">supp0rt.aspx<\/span> Web\u30b7\u30a7\u30eb\u304b\u3089\u62bd\u51fa\u3057\u305f\u3082\u306e\u3067\u3001<span style=\"font-family: 'courier new', courier, monospace;\">54242e9b610a7ca15024a784969c9e0d<\/span>\u3068\u3044\u3046\u30d1\u30e9\u30e1\u30fc\u30bf\u5185\u3067\u30a2\u30af\u30bf\u30fc\u304c\u63d0\u4f9b\u3057\u305f\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u653b\u6483\u3067\u306f\u3001\u30a2\u30af\u30bf\u30fc\u304c<span style=\"font-family: 'courier new', courier, monospace;\">supp0rt.aspx<\/span>Web\u30b7\u30a7\u30eb\u306b\u5bfe\u3057\u3001\u5b9f\u884c\u3059\u308b\u30b3\u30fc\u30c9\u3092<span style=\"font-family: 'courier new', courier, monospace;\">6b83ccc96b4abd4cea1c7c607688a8ad<\/span>\u3068\u3044\u3046\u540d\u524d\u306e\u4ed8\u3044\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u5185\u3067\u63d0\u4f9b\u3057\u3066\u3044\u308b\u69d8\u5b50\u304c\u89b3\u6e2c\u3055\u308c\u307e\u3057\u305f\u3002\u5148\u306b\u898b\u305f\u3068\u304a\u308a\u3001\u79c1\u305f\u3061\u306f\u9ad8\u3044\u78ba\u5ea6\u3067\u30a2\u30af\u30bf\u30fc\u304c\u3053\u308c\u3089\u306e\u653b\u6483\u3067\u540c\u3058Web\u30b7\u30a7\u30eb\u30b3\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u305f\u3082\u306e\u3068\u78ba\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u3055\u3044\u306f\u3001\u30d1\u30e9\u30e1\u30fc\u30bf<span style=\"font-family: 'courier new', courier, monospace;\">54242e9b610a7ca15024a784969c9e0d<\/span>\u306e\u3068\u3053\u308d\u3067\u304b\u308f\u308a\u306e\u30d1\u30e9\u30e1\u30fc\u30bf<span style=\"font-family: 'courier new', courier, monospace;\">6b83ccc96b4abd4cea1c7c607688a8ad<\/span>\u3092\u4f7f\u3063\u3066\u3044\u305f\u3082\u306e\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u305f\u3057\u304b\u306bChina Chopper\u306e\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9JScript\u306f\u30aa\u30f3\u30e9\u30a4\u30f3\u3067\u7c21\u5358\u306b\u5165\u624b\u53ef\u80fd\u3067\u3059\u304c\u3001\u540c\u3058Web\u30b7\u30a7\u30eb\u306e\u7d44\u307f\u5408\u308f\u305b\u3092\u4f7f\u3063\u3066\u3044\u308b\u3053\u3068\u3001<span style=\"font-family: 'courier new', courier, monospace;\">supp0rt.aspx<\/span>\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u540d\u3001\u305d\u308c\u306bPowerShell\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u306e\u306b\u30e9\u30f3\u30c0\u30e0\u306a32\u6587\u5b57\u306e\u82f1\u6570\u5b57\u304b\u3089\u306a\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u540d\u3092\u4f7f\u3063\u3066\u3044\u308b\u3053\u3068\u3001\u3053\u308c\u3089\u304b\u3089\u8003\u3048\u3066\u3001\u80cc\u5f8c\u306b\u3044\u308b\u306e\u306f\u540c\u4e00\u306e\u30a2\u30af\u30bf\u30fc\u3067\u3042\u308b\u304b\u3001\u540c\u3058\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u8907\u6570\u306e\u30a2\u30af\u30bf\u30fc\u3067\u3042\u308b\u3053\u3068\u304c\u793a\u5506\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u30a2\u30af\u30bf\u30fc\u304c\u30b5\u30fc\u30d0\u30fc\u3092\u60aa\u7528\u3057\u3066Web\u30b7\u30a7\u30eb\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3057\u305fIP\u30a2\u30c9\u30ec\u30b9\u306f\u6b63\u78ba\u306b\u306f\u308f\u304b\u3063\u3066\u3044\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">supp0rt.aspx<\/span>\u30d5\u30a1\u30a4\u30eb\u304c\u30c7\u30a3\u30b9\u30af\u306b\u66f8\u304d\u8fbc\u307e\u308c\u3066\u304b\u30891\u5206\u4ee5\u5185\u306b\u3001Exchange\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3088\u3046\u3068\u3059\u308b<span style=\"font-family: 'courier new', courier, monospace;\">\/ecp\/program.js<\/span>\u3078\u306e\u6210\u529f\u3057\u305fHTTP POST\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u8907\u6570\u3042\u3063\u305f\u305f\u3081\u3067\u3059\u3002\u30d1\u30b9<span style=\"font-family: 'courier new', courier, monospace;\">\/ecp\/program.js<\/span>\u306f\u3053\u306e\u653b\u6483\u306b\u7279\u6709\u306e\u3082\u306e\u3067\u306f\u306a\u3044\u3088\u3046\u3067\u3001<a href=\"https:\/\/twitter.com\/SecShoggoth\/status\/1368699174066266115?s=20\">\u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b5\u30fc\u30c1\u30e3\u30fc\u3082<\/a>Exchange Server\u3092\u60aa\u7528\u3059\u308b\u305f\u3081\u306b\u3053\u306e\u30d1\u30b9\u304c\u4f7f\u308f\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u3044\u308b\u3068\u8ff0\u3079\u3066\u3044\u307e\u3059\uff08<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26855\">CVE-2021-26855<\/a>\uff09\u3002\u6210\u529f\u3057\u305f\u3059\u3079\u3066\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306fUser-Agent\u3068\u3057\u3066<span style=\"font-family: 'courier new', courier, monospace;\">ExchangeServicesClient\/0.0.0.0<\/span>\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u307e\u305f\u3001\u9001\u4fe1\u5143IP\u30a2\u30c9\u30ec\u30b9\u306f\u4ee5\u4e0b\u306e\u3082\u306e\u3067\u3057\u305f\u3002<\/p>\n<ul>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">156.194.127[.]178<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">112.160.243[.]172<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">221.179.87[.]175<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">73.184.77[.]174<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">41.237.156[.]15<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">223.16.210[.]90<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">63.76.255[.]110<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">218.103.234[.]104<\/span><\/li>\n<li><span style=\"font-family: 'courier new', courier, monospace;\">83.110.215[.]7<\/span><\/li>\n<\/ul>\n<p>\u6570\u65e5\u9593\u306f\u6d3b\u52d5\u304c\u898b\u3089\u308c\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u30012021\u5e743\u670812\u65e52:35:27\u306b\u30a2\u30af\u30bf\u30fc\u306f<span style=\"font-family: 'courier new', courier, monospace;\">121.150.12[.]35<\/span>\u304b\u3089\u6700\u521d\u306bWeb\u30b7\u30a7\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001<span style=\"font-family: 'courier new', courier, monospace;\">\/aspnet_client\/supp0rt.aspx<\/span>\u306b\u79fb\u52d5\u3057\u307e\u3057\u305f\u3002HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">6b83ccc96b4abd4cea1c7c607688a8ad<\/span>\u3068\u3044\u3046\u30e9\u30d9\u30eb\u306e\u4ed8\u3044\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u306fWeb\u30b7\u30a7\u30eb\u304c\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u5b9f\u884c\u3059\u308bbase64\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305fPowerShell\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u6b21\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u4e00\u89a7\u8868\u793a\u3057\u3001\u6587\u5b57\u5217<span style=\"font-family: 'courier new', courier, monospace;\">oamoisjmdo<\/span>\u3068\u6587\u5b57\u5217<span style=\"font-family: 'courier new', courier, monospace;\">sodknousfnfdklj<\/span>\u3068\u306e\u9593\u306e\u631f\u3093\u3067\u30ea\u30b9\u30c8\u3092\u8fd4\u3057\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js2.png\" rel=\"wpdevart_lightbox\"><img  class=\"aligncenter wp-image-118578 size-full lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js2.png\" alt=\"Jscript2\" width=\"932\" height=\"73\" \/><\/a><br \/>\n\u30a2\u30af\u30bf\u30fc\u306f\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u5217\u6319\u3057\u3066Local Security Authority Subsystem Service\uff08LSASS\uff09\u30d7\u30ed\u30bb\u30b9\u306e\u30d7\u30ed\u30bb\u30b9ID\uff08PID\uff09\u3092\u898b\u3064\u3051\u3088\u3046\u3068\u3057\u307e\u3057\u305f\u3002\u30e1\u30e2\u30ea\u3092\u30c0\u30f3\u30d7\u3057\u3066\u8a8d\u8a3c\u60c5\u5831\u3092\u53ce\u96c6\u3059\u308b\u305f\u3081\u3067\u3059\u3002\u30a2\u30af\u30bf\u30fc\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">6b83ccc96b4abd4cea1c7c607688a8ad<\/span>\u30d1\u30e9\u30e1\u30fc\u30bf\u5185\u306b\u3042\u308b<span style=\"font-family: 'courier new', courier, monospace;\">\/aspnet_client\/supp0rt.aspx<\/span>\u306b\u3042\u308b\u540c\u3058Web\u30b7\u30a7\u30eb\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u308c\u305f2\u756a\u76ee\u306ePowerShell\u30b9\u30af\u30ea\u30d7\u30c8\u5185\u3067LSASS\u306ePID\uff08584\u3002\u5f8c\u306e\u4f8b\u3092\u53c2\u7167\uff09\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002\u30a2\u30af\u30bf\u30fc\u306f\u30012021\u5e743\u670812\u65e52:35:30\u3001\u6700\u521d\u306ePowerShell\u304b\u30893\u79d2\u5f8c\u306b2\u756a\u76ee\u306ePowerShell\u3092Web\u30b7\u30a7\u30eb\u306b\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3057\u3001\u305d\u306e\u5f8c<span style=\"font-family: 'courier new', courier, monospace;\">164.68.156[.]31<\/span>\u306bIP\u30a2\u30c9\u30ec\u30b9\u3092\u5207\u308a\u66ff\u3048\u305f\u3088\u3046\u3067\u3059\u3002Web\u30b7\u30a7\u30eb\u3078\u306e2\u3064\u306e\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9\u30ea\u30af\u30a8\u30b9\u30c8\u9593\u9694\u304c\u77ed\u304f\u3001IP\u30a2\u30c9\u30ec\u30b9\u3092\u5207\u308a\u66ff\u3048\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u3001\u30a2\u30af\u30bf\u30fc\u306f\u3053\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u3042\u308b\u7a0b\u5ea6\u81ea\u52d5\u5316\u3057\u3066\u3044\u308b\u3082\u306e\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002Unit 42\u306f\u3001\u30a2\u30af\u30bf\u30fc\u304cWeb\u30b7\u30a7\u30eb\u3068\u306e\u3084\u308a\u3068\u308a\u3092\u81ea\u52d5\u5316\u3057\u3066\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3057\u3001\u4fb5\u5bb3\u6e08\u307fExchange\u30b5\u30fc\u30d0\u30fc\u306e\u9577\u3044\u30ea\u30b9\u30c8\u306b\u5bfe\u3057\u3066\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u5f8c\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u3057\u304b\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u305f\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u30022\u756a\u76ee\u306ePowerShell\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u306f\u3001\u30d0\u30c3\u30c1\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u30b5\u30fc\u30d0\u30fc\u4e0a\u306e<span style=\"font-family: 'courier new', courier, monospace;\">test.bat<\/span>\u306b\u4fdd\u5b58\u3059\u308b\u6b21\u306e\u5185\u5bb9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u305d\u306e\u5f8c\u3001<span style=\"font-family: 'courier new', courier, monospace;\">cmd.exe<\/span>\u30d7\u30ed\u30bb\u30b9\u3092\u751f\u6210\u3057\u3066\u3053\u308c\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<br \/>\n<a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js3.png\" rel=\"wpdevart_lightbox\"><img  class=\"aligncenter size-full wp-image-118581 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js3.png\" alt=\"jscript3\" width=\"918\" height=\"243\" \/><\/a><br \/>\n\u3053\u306e<span style=\"font-family: 'courier new', courier, monospace;\">test.bat<\/span>\u3068\u3044\u3046\u30d0\u30c3\u30c1\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u3001\u6b21\u306e4\u3064\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3088\u3046\u3068\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u3067\u306f\u5b9f\u8cea\u4e0a\u3001<span style=\"font-family: 'courier new', courier, monospace;\">comsvcs.dll<\/span>\u3067LSASS\u306e\u30e1\u30e2\u30ea\u3092\u30c0\u30f3\u30d7\u3057\u3001<span style=\"font-family: 'courier new', courier, monospace;\">dsquery<\/span>\u3067\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u95a2\u3059\u308b\u3088\u308a\u591a\u304f\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u60c5\u5831\u3092\u53d6\u5f97\u3057\u3001<span style=\"font-family: 'courier new', courier, monospace;\">makecab<\/span>\u3067\u524d\u306e2\u3064\u306e\u6f0f\u51fa\u7528\u30b3\u30de\u30f3\u30c9\u306e\u7d50\u679c\u304b\u3089\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u4f5c\u6210\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js4.png\" rel=\"wpdevart_lightbox\"><img  class=\"aligncenter size-full wp-image-118584 lozad\"  data-src=\"https:\/\/unit42-preview.paloaltonetworks.com\/wp-content\/uploads\/2021\/04\/js4.png\" alt=\"Jscript4\" width=\"918\" height=\"110\" \/><\/a><br \/>\n\u6570\u6642\u9593\u5f8c\u306e2021\u5e743\u670812\u65e510:07:09\u3001\u30a2\u30af\u30bf\u30fc\u306fIP\u30a2\u30c9\u30ec\u30b9\u3092<span style=\"font-family: 'courier new', courier, monospace;\">45.77.140[.]214<\/span>\u306b\u5909\u66f4\u3057\u3001<span style=\"font-family: 'courier new', courier, monospace;\">dsquery<\/span>\u30b3\u30de\u30f3\u30c9\u306e\u7d50\u679c\u304c\u542b\u307e\u308c\u308b\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb<span style=\"font-family: 'courier new', courier, monospace;\">f4[\u25cf\u25cf\u25cf\u25cf]9b.dmp.zip<\/span>\u3092\u6b63\u5e38\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u3088\u3046\u3067\u3059\u3002User-Agent\u304c<span style=\"font-family: 'courier new', courier, monospace;\">Mozilla\/5.0 (Windows NT 6.1; Trident\/7.0; rv:11.0) like Gecko<\/span>\u3067\u3042\u308b\u3053\u3068\u304b\u3089\u3001\u30a2\u30af\u30bf\u30fc\u306fWindows 7\u30b7\u30b9\u30c6\u30e0\u306eInternet Explorer 11\u30d6\u30e9\u30a6\u30b6\u3067\u6b63\u3057\u3044URL\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3066\u3053\u306e\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u3088\u3046\u3067\u3059\u3002\u79c1\u305f\u3061\u304c<span style=\"font-family: 'courier new', courier, monospace;\">f4[\u25cf\u25cf\u25cf\u25cf]9b.dmp.zip<\/span>\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u8a8d\u3057\u305f\u3068\u3053\u308d\u3001\u3053\u306e\u4e2d\u306b\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">f4[\u25cf\u25cf\u25cf\u25cf]9b.tmp<\/span>\u30d5\u30a1\u30a4\u30eb\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u304c\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306f\u7a7a\u3067\u3057\u305f\u3002\u3053\u308c\u306f\u3064\u307e\u308a\u30d0\u30c3\u30c1\u30b9\u30af\u30ea\u30d7\u30c8\u306b\u3088\u3063\u3066\u5b9f\u884c\u3055\u308c\u305f<span style=\"font-family: 'courier new', courier, monospace;\">dsquery<\/span>\u30b3\u30de\u30f3\u30c9\u306f\u3001Active Directory\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u60c5\u5831\u3092\u3046\u307e\u304f\u53ce\u96c6\u3067\u304d\u306a\u304b\u3063\u305f\u3068\u3044\u3046\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e1\u79d2\u5f8c\u306e2021\u5e743\u670812\u65e510:07:10\u3001\u30a2\u30af\u30bf\u30fc\u306f<span style=\"font-family: 'courier new', courier, monospace;\">45.77.140[.]214<\/span>\u304b\u3089<span style=\"font-family: 'courier new', courier, monospace;\">\/aspnet_client\/f4[\u25cf\u25cf\u25cf\u25cf]9b1.dmp.zip<\/span>\u306b\u5bfe\u3057\u3066GET\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51fa\u3057\u3066LASS\u306e\u30e1\u30e2\u30ea\u30c0\u30f3\u30d7\u3092\u542b\u3080\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3088\u3046\u3068\u3057\u307e\u3057\u305f\u304c\u3001\u30b5\u30fc\u30d0\u30fc\u306f\u300c404 Not Found\u300d\u30a8\u30e9\u30fc\u3067\u5fdc\u7b54\u3057\u307e\u3057\u305f\u3002\u30a2\u30af\u30bf\u30fc\u306f2021\u5e743\u670812\u65e517:35:15\u307e\u3067\u7d99\u7d9a\u3057\u3066\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3092\u8a66\u307f\u307e\u3057\u305f\u3002\u3053\u3053\u3067\u30012021\u5e743\u670813\u65e5\u306e05:40:05\u306805:40:06\u306b\u30d5\u30a1\u30a4\u30eb\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3092\u3055\u3089\u306b2\u56de\u30ea\u30af\u30a8\u30b9\u30c8\u3055\u308c\u308b\u307e\u3067\u306e\u9593\u3001\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u304c\u4e2d\u65ad\u3055\u308c\u307e\u3057\u305f\u3002\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3059\u308b\u3059\u3079\u3066\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u306f\u540c\u3058404\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8fd4\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p>\u305d\u308c\u304b\u308920\u5206\u3082\u7d4c\u305f\u306a\u30442021\u5e743\u670813\u65e506:02:04\u3001\u30a2\u30af\u30bf\u30fc\u306f\u518d\u3073IP\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u66f4\u3057\uff08\u4eca\u56de\u306f<span style=\"font-family: 'courier new', courier, monospace;\">78.141.218[.]225<\/span>\uff09\u3001\u3055\u3089\u306b\u3053\u306e\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3092\u8a66\u307f\u307e\u3057\u305f\u3002\u30a2\u30af\u30bf\u30fc\u306f2021\u5e743\u670813\u65e516:33:03\u307e\u3067\u3053\u306e\u8a66\u884c\u3092\u7d9a\u3051\u3001\u5408\u8a0833\u56de\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u767a\u884c\u3057\u3001\u305d\u306e\u3059\u3079\u3066\u306bHTTP 404 \u5fdc\u7b54\u304c\u8fd4\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u79c1\u305f\u3061\u306f<span style=\"font-family: 'courier new', courier, monospace;\">f4[\u25cf\u25cf\u25cf\u25cf]9b1.dmp<\/span>\u30d5\u30a1\u30a4\u30eb\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u78ba\u304b\u306b\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u306fLSASS\u30d7\u30ed\u30bb\u30b9\u306e\u30e1\u30e2\u30ea\u5185\u5bb9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001Mimikatz\u3092\u4f7f\u7528\u3057\u3066\u8a8d\u8a3c\u60c5\u5831\u3092\u30c0\u30f3\u30d7\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u3053\u306eExchange\u30b5\u30fc\u30d0\u30fc\u3067\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u53d6\u5f97\u9632\u6b62\u30e2\u30b8\u30e5\u30fc\u30eb\uff08Password Theft Protection\uff09\u3092\u6709\u52b9\u306b\u3057\u305fCortex XDR\u3092\u7a3c\u50cd\u3057\u3066\u304a\u308a\u3001\u3053\u306e\u305f\u3081\u306b\u30c0\u30f3\u30d7\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u8a8d\u8a3c\u60c5\u5831\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u304c\u524a\u9664\u3055\u308c\u3066\u3044\u305f\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3057\u305f\u3002\u3064\u307e\u308a\u3001\u30a2\u30af\u30bf\u30fc\u304c\u30e1\u30e2\u30ea\u30c0\u30f3\u30d7\u3092\u542b\u3080\u30ad\u30e3\u30d3\u30cd\u30c3\u30c8\u30d5\u30a1\u30a4\u30eb<span style=\"font-family: 'courier new', courier, monospace;\">f4[\u25cf\u25cf\u25cf\u25cf]9b1.dmp.zip<\/span>\u3092\u6b63\u5e38\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3067\u304d\u3066\u3044\u305f\u3068\u3057\u3066\u3082\u3001\u7d44\u7e54\u306b\u3055\u3089\u306b\u88ab\u5bb3\u3092\u4e0e\u3048\u308b\u3079\u304f\u8ffd\u52a0\u306e\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u884c\u3046\u306e\u3067\u3042\u308c\u3070\u5fc5\u8981\u3068\u306a\u308b\u8a8d\u8a3c\u60c5\u5831\u306f\u3001Mimikatz\u3092\u4f7f\u3063\u3066\u62bd\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u304b\u3063\u305f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>Microsoft Exchange Server\u306e\u6700\u8fd1\u306e\u8106\u5f31\u6027\u306b\u5bfe\u3057\u3001\u5927\u898f\u6a21\u306a\u60aa\u7528\u304c\u6a2a\u884c\u3057\u3066\u3044\u307e\u3059\u3002\u7d44\u7e54\u304c<a href=\"https:\/\/blog.paloaltonetworks.com\/2021\/03\/patching-microsoft-exchange-servers\/?lang=ja\">\u30b5\u30fc\u30d0\u30fc\u306b\u3059\u3070\u3084\u304f\u30d1\u30c3\u30c1\u3092\u9069\u7528\u3057\u3088\u3046<\/a>\u3068\u3059\u308b\u4e00\u65b9\u3067\u3001\u653b\u6483\u8005\u306f\u30c1\u30e3\u30f3\u30b9\u304c\u3042\u308b\u3046\u3061\u306f\u60aa\u7528\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002Unit 42\u306f\u3001\u3055\u307e\u3056\u307e\u306a\u30a2\u30af\u30bf\u30fc\u304c\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u3092\u4f7f\u7528\u3057\u3066\u591a\u7a2e\u591a\u69d8\u306aWeb\u30b7\u30a7\u30eb\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3001\u4fb5\u5bb3\u3057\u305fExchange\u30b5\u30fc\u30d0\u30fc\u3092\u4fb5\u5165\u53e3\u3068\u3057\u3066\u3001Exchange\u30b5\u30fc\u30d0\u30fc\u3084\u305d\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u3055\u3089\u306a\u308b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u5b9f\u884c\u3057\u3088\u3046\u3068\u3059\u308b\u69d8\u5b50\u3092\u89b3\u6e2c\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>EMEA\u5730\u57df\u306e\u91d1\u878d\u6a5f\u95a2\u306b\u5bfe\u3059\u308b\u3042\u308b\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u3067\u306f\u3001\u653b\u6483\u8005\u304cWeb\u30b7\u30a7\u30eb\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3001\u81ea\u52d5\u5316\u306e\u30a2\u30d7\u30ed\u30fc\u30c1\u3067Web\u30b7\u30a7\u30eb\u3068\u3084\u308a\u3068\u308a\u3057\u3001\u60c5\u5831\u3092\u53ce\u96c6\u3057\u3001\u4fb5\u5bb3\u3055\u308c\u305f\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u8a8d\u8a3c\u60c5\u5831\u3092\u30c0\u30f3\u30d7\u3059\u308b\u69d8\u5b50\u3092\u89b3\u6e2c\u3057\u307e\u3057\u305f\u3002\u3055\u3044\u308f\u3044\u3053\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u3067\u306f\u3001\u88ab\u5bb3\u7d44\u7e54\u304cCortex XDR\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u30d1\u30b9\u30ef\u30fc\u30c9\u53d6\u5f97\u9632\u6b62\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u6709\u52b9\u306b\u3057\u3066\u3044\u305f\u305f\u3081\u306b\u3001\u30a2\u30af\u30bf\u30fc\u304c\u8a8d\u8a3c\u60c5\u5831\u53ce\u96c6\u7528\u306b\u53d6\u5f97\u3057\u3088\u3046\u3068\u3057\u305f\u30e1\u30e2\u30ea\u30c0\u30f3\u30d7\u304b\u3089\u306f\u8a8d\u8a3c\u60c5\u5831\u306e\u30cf\u30c3\u30b7\u30e5\u3078\u306e\u30dd\u30a4\u30f3\u30bf\u304c\u524a\u9664\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u305f\u3081Mimikatz \u3092\u4f7f\u3063\u3066\u30a2\u30af\u30bf\u30fc\u304c\u8a8d\u8a3c\u60c5\u5831\u3092\u30c0\u30f3\u30d7\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<p>Unit 42 \u30d6\u30ed\u30b0\u300c<a href=\"https:\/\/unit42.paloaltonetworks.jp\/microsoft-exchange-server-vulnerabilities\/\">\u8105\u5a01\u306e\u8a55\u4fa1: Microsoft Exchange Server\u306b\u304a\u3051\u308b4\u3064\u306e\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\u306e\u60aa\u7528\u304c\u6d3b\u767a\u5316<\/a>\u300d\u3067\u8aac\u660e\u3057\u305f\u3068\u304a\u308a\u3001\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001\u88fd\u54c1\u30a8\u30b3\u30b7\u30b9\u30c6\u30e0\u5168\u4f53\u3067Microsoft Exchange Server\u3078\u306e\u653b\u6483\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u672c\u653b\u6483\u306b\u7279\u5316\u3057\u305f\u4fdd\u8b77\u3092\u6b21\u306e\u88fd\u54c1\u3084\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u306b\u5c55\u958b\u6e08\u307f\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\n<ul>\n<li>\u8105\u5a01\u9632\u5fa1\uff084\u3064\u306e\u8106\u5f31\u6027\u3092\u691c\u51fa\u3059\u308bContent Pack 8380\u3092\u5c55\u958b\uff09<\/li>\n<li>URL\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0<\/li>\n<\/ul>\n<\/li>\n<li><a href=\"https:\/\/docs.paloaltonetworks.com\/cortex\/cortex-xdr\/7-3\/cortex-xdr-agent-release-notes\/cortex-xdr-agent-release-information\/features-introduced-in-cortex-xdr-agent.html\">Cortex XDR 7.3.1<\/a><\/li>\n<li>Cortex XSOAR<\/li>\n<\/ul>\n<h4>\u8ffd\u52a0\u8cc7\u6599<\/h4>\n<ul>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/microsoft-exchange-server-attack-timeline\/\">Microsoft Exchange Server\u3078\u306e\u653b\u6483\u306e\u30bf\u30a4\u30e0\u30e9\u30a4\u30f3<\/a><\/li>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/microsoft-exchange-server-vulnerabilities\/\">\u8105\u5a01\u306e\u8a55\u4fa1: Microsoft Exchange Server\u306b\u304a\u3051\u308b4\u3064\u306e\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\u306e\u60aa\u7528\u304c\u6d3b\u767a\u5316<\/a><\/li>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/remediation-steps-for-the-microsoft-exchange-server-vulnerabilities\/\">Microsoft Exchange Server\u306e\u8106\u5f31\u6027\u306e\u4fee\u5fa9\u624b\u9806<\/a><\/li>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/china-chopper-webshell\/\">China Chopper Web\u30b7\u30a7\u30eb\u3092\u4f7f\u7528\u3057\u305fMicrosoft Exchange Server\u306b\u5bfe\u3059\u308b\u653b\u6483\u306e\u5206\u6790<\/a><\/li>\n<\/ul>\n<h4>IoC<\/h4>\n<ul>\n<li>156.194.127[.]178<\/li>\n<li>112.160.243[.]172<\/li>\n<li>221.179.87[.]175<\/li>\n<li>73.184.77[.]174<\/li>\n<li>41.237.156[.]15<\/li>\n<li>223.16.210[.]90<\/li>\n<li>63.76.255[.]110<\/li>\n<li>218.103.234[.]104<\/li>\n<li>83.110.215[.]7<\/li>\n<li>121.150.12[.]35<\/li>\n<li>164.68.156[.]31<\/li>\n<li>45.77.140[.]214<\/li>\n<li>78.141.218[.]225<\/li>\n<\/ul>\n<h4>TTP\uff08\u6226\u8853\u3001\u6280\u8853\u3001\u304a\u3088\u3073\u624b\u9806\uff09<\/h4>\n<table style=\"width: 101.483%;\">\n<tbody>\n<tr>\n<td style=\"width: 36.5619%;\"><strong>\u30c6\u30af\u30cb\u30c3\u30af\uff08ID\uff09<\/strong><\/td>\n<td style=\"width: 13.8385%;\"><strong>\u30c6\u30af\u30cb\u30c3\u30afID<\/strong><\/td>\n<td style=\"width: 83.4852%;\"><strong>\u8aac\u660e<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1190\/\">Exploit Public-Facing Application\uff08\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u516c\u958b\u3055\u308c\u305f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u60aa\u7528\uff09 <\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1190\/\">T1190<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304cMicrosoft Exchange\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1505\/003\/\">Server Software Component: Web Shell\uff08\u30b5\u30fc\u30d0\u30fc\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8: Web\u30b7\u30a7\u30eb\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1505\/003\/\">T1505.003<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u4fb5\u5bb3\u3057\u305fExchange\u30b5\u30fc\u30d0\u30fc\u3078Web\u30b7\u30a7\u30eb\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1132\/001\/\">Data Encoding: Standard Encoding\uff08\u30c7\u30fc\u30bf\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0: \u6a19\u6e96\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1132\/001\/\">T1132.001<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u5b9f\u884c\u7528base64\u30a8\u30f3\u30b3\u30fc\u30c9\u30b9\u30af\u30ea\u30d7\u30c8\u3092Web\u30b7\u30a7\u30eb\u3078\u767a\u884c<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1119\/\">Automated Collection\uff08\u81ea\u52d5\u5316\u3055\u308c\u305f\u53ce\u96c6\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1119\/\">T1119<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u30d0\u30c3\u30c1\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f7f\u3044\u60c5\u5831\u3092\u53ce\u96c6\u3057LSASS\u306e\u30e1\u30e2\u30ea\u3092\u30c0\u30f3\u30d7<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1005\/\">Data from Local System\uff08\u30ed\u30fc\u30ab\u30eb\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u306e\u30c7\u30fc\u30bf\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1005\/\">T1005<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u53ce\u96c6\u3057LSASS\u306e\u30d7\u30ed\u30bb\u30b9ID\uff08PID\uff09\u3092\u767a\u898b<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1087\/002\/\">Account Discovery: Domain Account\uff08\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u63a2\u7d22: \u30c9\u30e1\u30a4\u30f3\u30a2\u30ab\u30a6\u30f3\u30c8\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1087\/002\/\">T1087.002<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u300cdsquery\u300d\u3067Active Directory\u3001\u7279\u306b\u30e6\u30fc\u30b6\u30fc\u30a2\u30ab\u30a6\u30f3\u30c8\u304b\u3089\u60c5\u5831\u3092\u53ce\u96c6<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1003\/001\/\">OS Credential Dumping: LSASS Memory\uff08OS\u8a8d\u8a3c\u60c5\u5831\u306e\u30c0\u30f3\u30d7: LSASS\u30e1\u30e2\u30ea)<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1003\/001\/\">T1003.001<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u300ccomsvc.dll\u300d\u5185\u306eMiniDump\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066LSASS\u306e\u30e1\u30e2\u30ea\u3092\u30c0\u30f3\u30d7\u3057\u3066\u8a8d\u8a3c\u60c5\u5831\u3092\u30c0\u30f3\u30d7<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1560\/001\/\">Archive Collected Data: Archive via Utility\uff08\u53ce\u96c6\u30c7\u30fc\u30bf\u306e\u30a2\u30fc\u30ab\u30a4\u30d6: \u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u306b\u3088\u308b\u30a2\u30fc\u30ab\u30a4\u30d6\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1560\/001\/\">T1560.001<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u300cmakecab\u300d\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3092\u4f7f\u7528\u3057\u6f0f\u51fa\u524d\u306b\u30d5\u30a1\u30a4\u30eb\u3092\u5727\u7e2e<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 36.5619%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1074\/001\/\">Data Staged: Local Data Staging\uff08\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u3055\u308c\u305f\u30c7\u30fc\u30bf: \u30ed\u30fc\u30ab\u30eb\u30c7\u30fc\u30bf\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\uff09<\/a><\/td>\n<td style=\"width: 13.8385%;\"><a href=\"https:\/\/attack.mitre.org\/techniques\/T1074\/001\/\">T1074.001<\/a><\/td>\n<td style=\"width: 83.4852%;\">\u30a2\u30af\u30bf\u30fc\u304c\u6f0f\u51fa\u7528\u30d5\u30a1\u30a4\u30eb\u3092c:\\inetpub\\wwwroot\\aspnet_client\\\u306b\u4fdd\u5b58\u3057\u30d6\u30e9\u30a6\u30b6\u3092\u4ecb\u3057\u3066\u30ea\u30e2\u30fc\u30c8\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>\u66f4\u65b0\u5c65\u6b74<\/h4>\n<ul>\n<li>2021-04-30 \u82f1\u8a9e\u7248\u306e\u66f4\u65b0\u3092\u53cd\u6620\u3057\u307e\u3057\u305f\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 \u6700\u8fd1\u767a\u898b\u30fb\u4fee\u6b63\u3055\u308c\u305fMicrosoft 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