{"id":122972,"date":"2022-05-12T15:00:01","date_gmt":"2022-05-12T22:00:01","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=122972"},"modified":"2022-05-11T17:14:36","modified_gmt":"2022-05-12T00:14:36","slug":"malicious-compiled-html-help-file-agent-tesla","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/malicious-compiled-html-help-file-agent-tesla\/","title":{"rendered":"\u6709\u5bb3\u306a\u30d8\u30eb\u30d7: Agent Tesla\u3092\u914d\u4fe1\u3059\u308b\u60aa\u6027\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb(.chm)\u306e\u5206\u6790"},"content":{"rendered":"<h2><a id=\"post-122925-_o9jiwbz2ue\"><\/a>\u6982\u8981<\/h2>\n<p>\u672c\u7a3f\u306fUnit 42\u306e\u78ba\u8a8d\u3057\u305f\u60aa\u8cea\u306a\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb(.chm)\u306b\u3088\u308b\u653b\u6483\u306e\u89e3\u8aac\u8a18\u4e8b\u3067\u3059\u3002\u307e\u305a\u3053\u306e\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u6790\u65b9\u6cd5\u3092\u3001\u3064\u304e\u306bJavaScript\u3084PowerShell\u306a\u3069\u591a\u6bb5\u968e\u306e\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u304b\u3089\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u306b\u3044\u305f\u308b\u307e\u3067\u306e\u5206\u6790\u65b9\u6cd5\u3092\u9806\u306b\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n<p>\u4eca\u56de\u306e\u653b\u6483\u306f\u3001\u653b\u6483\u8005\u304c\u30da\u30a4\u30ed\u30fc\u30c9\u914d\u4fe1\u306b\u72ec\u5275\u7684\u624b\u53e3\u3092\u6a21\u7d22\u3057\u3066\u3044\u308b\u8208\u5473\u6df1\u3044\u3082\u306e\u3067\u3057\u305f\u3002\u305d\u306e\u76ee\u7684\u306f2\u3064\u3067\u3059\u3002<\/p>\n<ul>\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u88fd\u54c1\u3092\u56de\u907f\u3057\u305f\u3044<\/li>\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6559\u80b2\u3092\u56de\u907f\u3057\u305f\u3044<\/li>\n<\/ul>\n<p>\u6f5c\u5728\u7684\u88ab\u5bb3\u8005\u306f\u3001\u77e5\u3089\u306a\u3044\u9001\u4fe1\u8005\u304b\u3089\u306e\u6587\u66f8\u3084\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3092\u907f\u3051\u308b\u30c8\u30ec\u30fc\u30cb\u30f3\u30b0\u3092\u53d7\u3051\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u7a2e\u5225\u304c\u306a\u3093\u3067\u3042\u308c\u614e\u91cd\u306b\u5bfe\u5fdc\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u7279\u5b9a\u306e\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u306f\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u3068\u3057\u3066Agent Tesla\u3092\u914d\u4fe1\u3057\u3066\u3044\u307e\u3057\u305f\u3002Agent Tesla\u306f\u304b\u306a\u308a\u524d\u304b\u3089\u5b58\u5728\u3059\u308b\u3088\u304f\u77e5\u3089\u308c\u305f\u30de\u30eb\u30a6\u30a7\u30a2\u3067\u3001\u88ab\u5bb3\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u304b\u3089\u6a5f\u5fae\u60c5\u5831\u3092\u7a83\u53d6\u3057\u3001\u305d\u306e\u60c5\u5831\u3092FTP\u3001SMTP\u3001HTTP\u7d4c\u7531\u3067\u653b\u6483\u8005\u306b\u9001\u4fe1\u3059\u308b\u3053\u3068\u306b\u91cd\u70b9\u304c\u304a\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u4e3b\u306b\u306f\u30ad\u30fc\u30b9\u30c8\u30ed\u30fc\u30af\u306e\u8a18\u9332\u3001\u753b\u9762\u30ad\u30e3\u30d7\u30c1\u30e3\u3001\u30ab\u30e1\u30e9\u9332\u753b\u3001\u6a5f\u5bc6\u30c7\u30fc\u30bf\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306a\u3069\u304c\u4f7f\u308f\u308c\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\u3001\u540c\u69d8\u306e\u89e3\u6790\u5bfe\u7b56\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 style=\"width: 76.2314%;\">\n<tbody>\n<tr>\n<td style=\"width: 38.5681%;\"><span style=\"font-weight: 400;\">Unit 42\u306e\u95a2\u9023\u30c8\u30d4\u30c3\u30af<\/span><\/td>\n<td style=\"width: 203.002%;\"><a href=\"https:\/\/unit42.paloaltonetworks.jp\/category\/malware-2-ja\/\"><span style=\"font-weight: 400;\">Malware<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/agenttesla-ja\/\"><span style=\"font-weight: 400;\">Agent Tesla<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/anti-analysis-ja\/\"><span style=\"font-weight: 400;\">anti-analysis<\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><a id=\"post-122925-_lkji4fntta4d\"><\/a>\u76ee\u6b21<\/h2>\n<p><a href=\"#malicious-compiled-HTML-help-file\">\u60aa\u8cea\u306a\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb<\/a><br \/>\n<a href=\"#initial-powershell\">\u7b2c1\u6bb5\u968e\u306ePowerShell<\/a><br \/>\n<a href=\"#second-stage\">\u7b2c2\u6bb5\u968e<\/a><br \/>\n<a href=\"#final-agent-tesla-payload\">\u6700\u7d42\u6bb5\u968e\u306eAgent Tesla\u30da\u30a4\u30ed\u30fc\u30c9<\/a><br \/>\n<a href=\"#conclusion\">\u7d50\u8ad6<\/a><br \/>\n<a href=\"#indicators-of-compromise\">IoC<\/a><\/p>\n<h2><a id=\"malicious-compiled-HTML-help-file\"><\/a>\u60aa\u8cea\u306a\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb<\/h2>\n<p>\u653b\u6483\u306e\u7b2c\u4e00\u6bb5\u968e\u306f<span style=\"font-family: 'courier new', courier, monospace;\">ORDER OF CONTRACT-pdf.7z<\/span>\u3068\u3044\u3046\u540d\u524d\u306e7zip\u5727\u7e2e\u30d5\u30a1\u30a4\u30eb\u3092\u9001\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u4e2d\u306b\u306f\u3001\u60aa\u8cea\u306a\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb<span style=\"font-family: 'courier new', courier, monospace;\">ORDER OF CONTRACT-pdf.chm<\/span>(SHA256:<span style=\"font-family: 'courier new', courier, monospace;\">081fd54d8d4731bbea9a2588ca53672feef0b835dc9fa9855b020a352819feaa<\/span>) \u3060\u3051\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u88ab\u5bb3\u8005\u304c\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3068\u4e00\u898b\u7121\u5bb3\u305d\u3046\u306a\u3053\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122939\" aria-describedby=\"caption-attachment-122939\" style=\"width: 606px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122940 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-25.png\" alt=\"\u88ab\u5bb3\u8005\u304c\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3068\u4e00\u898b\u7121\u5bb3\u305d\u3046\u306a\u3053\u306e\u30a6\u30a3\u30f3\u30c9\u30a6\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\" width=\"606\" height=\"902\" \/><figcaption id=\"caption-attachment-122939\" class=\"wp-caption-text\">\u56f31. \u30c7\u30b3\u30a4(\u304a\u3068\u308a)\u306eHTML\u30d8\u30eb\u30d7\u30a6\u30a3\u30f3\u30c9\u30a6<\/figcaption><\/figure>\n<p>\u3053\u306e\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u30927zip\u3067\u89e3\u51cd\u3059\u308b\u3068\u5185\u5bb9\u3092\u898b\u3089\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u8208\u5473\u6df1\u3044\u306e\u304c\u3001\u304a\u3068\u308a\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u8868\u793a\u3057\u3066\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b<span style=\"font-family: 'courier new', courier, monospace;\">kkjhk.htm<\/span>\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122941\" aria-describedby=\"caption-attachment-122941\" style=\"width: 260px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122942 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-26.png\" alt=\"\u3053\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u306f7zip\u3067\u89e3\u51cd\u3059\u308b\u3068\u5185\u5bb9\u3092\u898b\u3089\u308c\u307e\u3059\u3002\u3053\u3053\u3067\u8208\u5473\u6df1\u3044\u306e\u304c\u3001\u304a\u3068\u308a\u30a6\u30a3\u30f3\u30c9\u30a6\u3092\u8868\u793a\u3057\u3066\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308bkkjhk.htm\u3068\u3044\u3046\u30d5\u30a1\u30a4\u30eb\u3067\u3059\u3002\" width=\"260\" height=\"274\" \/><figcaption id=\"caption-attachment-122941\" class=\"wp-caption-text\">\u56f32. \u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9<\/figcaption><\/figure>\n<p>\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u306f\u96e3\u8aad\u5316\u3055\u308c\u305fJavaScript\u304c\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3068\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122943\" aria-describedby=\"caption-attachment-122943\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122944 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-27.png\" alt=\"kkjhk.htm\u306b\u542b\u307e\u308c\u308b\u96e3\u8aad\u5316\u3055\u308c\u305fJavaScript\u30b3\u30fc\u30c9\" width=\"900\" height=\"903\" \/><figcaption id=\"caption-attachment-122943\" class=\"wp-caption-text\">\u56f33. kkjhk.htm\u306b\u542b\u307e\u308c\u308b\u96e3\u8aad\u5316\u3055\u308c\u305fJavaScript\u30b3\u30fc\u30c9<\/figcaption><\/figure>\n<p>Chrome\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304d\u3001Chrome\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3092\u4f7f\u3046\u3068\u3001\u3053\u306e\u30b3\u30fc\u30c9\u306e\u96e3\u8aad\u5316\u3092\u89e3\u9664\u3067\u304d\u307e\u3059\u3002\u4e0a\u306e\u30b3\u30fc\u30c9\u306f\u8fd4\u308a\u5024\u304c\u5909\u6570<span style=\"font-family: 'courier new', courier, monospace;\">r\u306b<\/span>\u683c\u7d0d\u3055\u308c\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002Chrome\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u306eJavaScript\u30c7\u30d0\u30c3\u30ac\u3092\u4f7f\u3046\u3068return\u6587\u3067\u30d6\u30ec\u30fc\u30af\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3067\u5b9f\u884c\u505c\u6b62\u5f8c\u3001\u5909\u6570<span style=\"font-family: 'courier new', courier, monospace;\">r<\/span>\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u3066\u30b3\u30d4\u30fc\u3059\u308c\u3070\u3055\u3089\u306b\u5206\u6790\u3092\u9032\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122945\" aria-describedby=\"caption-attachment-122945\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122946 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-28.png\" alt=\"\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3067\u5b9f\u884c\u505c\u6b62\u5f8c\u3001\u5909\u6570r\u306e\u5185\u5bb9\u3092\u78ba\u8a8d\u3057\u3066\u30b3\u30d4\u30fc\u3059\u308c\u3070\u3055\u3089\u306b\u5206\u6790\u3092\u9032\u3081\u3089\u308c\u307e\u3059\u3002Chrome\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067kkjhk.htm\u3092\u30c7\u30d0\u30c3\u30b0\u3057\u3066\u3044\u308b\u69d8\u5b50\u3092\u793a\u3059\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 \" width=\"900\" height=\"414\" \/><figcaption id=\"caption-attachment-122945\" class=\"wp-caption-text\">\u56f34. Chrome\u30c7\u30d9\u30ed\u30c3\u30d1\u30fc\u30c4\u30fc\u30eb\u3067kkjhk.htm\u3092\u30c7\u30d0\u30c3\u30b0<\/figcaption><\/figure>\n<p>\u5909\u6570<span style=\"font-family: 'courier new', courier, monospace;\">r<\/span>\u306e\u5185\u5bb9\u306f\u3001\u304a\u3068\u308a\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3059\u308bHTML\u30b3\u30fc\u30c9\u3068PowerShell\u3092\u5b9f\u884c\u3059\u308b\u30b3\u30de\u30f3\u30c9\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122947\" aria-describedby=\"caption-attachment-122947\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122948 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-29.png\" alt=\"\u5909\u6570r\u306e\u5185\u5bb9\u306f\u3001\u304a\u3068\u308a\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3059\u308bHTML\u30b3\u30fc\u30c9\u3068PowerShell\u3092\u5b9f\u884c\u3059\u308b\u30b3\u30de\u30f3\u30c9\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\" width=\"900\" height=\"479\" \/><figcaption id=\"caption-attachment-122947\" class=\"wp-caption-text\">\u56f35. \u96e3\u8aad\u5316\u3092\u89e3\u9664\u3055\u308c\u305fkkjhk.htm\u306e\u5185\u5bb9<\/figcaption><\/figure>\n<h2><a id=\"initial-powershell\"><\/a>\u7b2c1\u6bb5\u968e\u306ePowerShell<\/h2>\n<p>\u96e3\u8aad\u5316\u3055\u308c\u305fPowerShell\u30b3\u30fc\u30c9\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u958b\u304b\u308c\u308b\u3068\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122949\" aria-describedby=\"caption-attachment-122949\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122950 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-30.png\" alt=\"\u96e3\u8aad\u5316\u3055\u308c\u305fPowerShell\u30b3\u30fc\u30c9\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u958b\u304b\u308c\u308b\u3068\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u3067\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\" width=\"900\" height=\"530\" \/><figcaption id=\"caption-attachment-122949\" class=\"wp-caption-text\">\u56f36. \u7b2c1\u6bb5\u968e\u306e\u96e3\u8aad\u5316\u3055\u308c\u305fPowerShell<\/figcaption><\/figure>\n<p>\u6700\u5f8c\u306e\u96e3\u8aad\u5316\u3055\u308c\u305f<span style=\"font-family: 'courier new', courier, monospace;\">Invoke-Expression<\/span> \u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8<span style=\"font-family: 'courier new', courier, monospace;\">(<span class=\"lang:default decode:true crayon-inline\">I`E`X()<\/span><\/span>)\u3092\u53d6\u308a\u9664\u3044\u3066\u30b3\u30fc\u30c9\u306e\u96e3\u8aad\u5316\u3092\u89e3\u9664\u3059\u308c\u3070\u3055\u3089\u306b\u30b3\u30fc\u30c9\u304c\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002PowerShell\u306f\u300c`\u300d\u6587\u5b57\u3092\u7121\u8996\u3059\u308b\u306e\u3067\u3001\u653b\u6483\u8005\u304c\u5358\u7d14\u306a\u6587\u5b57\u5217\u8a8d\u8b58\u3092\u907f\u3051\u3088\u3046\u3068\u3057\u3066\u6a5f\u5fae\u306a\u30b3\u30de\u30f3\u30c9\u306b\u300c`\u300d\u3092\u633f\u5165\u3059\u308b\u3053\u3068\u306f\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u306e\u5834\u5408\u3001PowerShell\u306e<span style=\"font-family: 'courier new', courier, monospace;\">Test-Connection<\/span>\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8\u3092\u4f7f\u3063\u3066Google \u306bping\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u3067\u63a5\u7d9a\u72b6\u614b\u3092\u78ba\u8a8d\u3057\u3066\u304b\u3089\u51e6\u7406\u3092\u7d99\u7d9a\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u6b21\u306b<span style=\"font-family: 'courier new', courier, monospace;\">http:\/\/pk-consult[.]hr\/N2.jpg<\/span>\u304b\u3089\u30b3\u30fc\u30c9\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122951\" aria-describedby=\"caption-attachment-122951\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122952 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-31.png\" alt=\"\u6700\u5f8c\u306e\u96e3\u8aad\u5316\u3055\u308c\u305fInvoke-Expression\u30b3\u30de\u30f3\u30c9\u30ec\u30c3\u30c8(I&#96;E&#96;X())\u3092\u53d6\u308a\u9664\u3044\u3066\u30b3\u30fc\u30c9\u306e\u96e3\u8aad\u5316\u3092\u89e3\u9664\u3059\u308c\u3070\u3055\u3089\u306b\u30b3\u30fc\u30c9\u304c\u8aad\u307f\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\" width=\"900\" height=\"352\" \/><figcaption id=\"caption-attachment-122951\" class=\"wp-caption-text\">\u56f37 \u96e3\u8aad\u5316\u3092\u89e3\u9664\u3055\u308c\u305f\u7b2c1\u6bb5\u968e\u306ePowerShell<\/figcaption><\/figure>\n<h2><a id=\"second-stage\"><\/a>\u7b2c2\u6bb5\u968e<\/h2>\n<p>\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u308b\u306e\u306f\u5b9f\u969b\u306b\u306fjpeg\u3067\u306f\u306a\u304f\u5b9f\u884c\u7528\u306e\u3055\u3089\u306a\u308bPowerShell\u30b3\u30fc\u30c9\u3067\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u8907\u6570\u306ebyte\u578b\u914d\u5217\u3092\u5c55\u958b\u3057\u3066\u30e1\u30e2\u30ea\u306b\u30ed\u30fc\u30c9\u3057\u3066\u3044\u308b\u69d8\u5b50\u304c\u898b\u3066\u53d6\u308c\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_122954\" aria-describedby=\"caption-attachment-122954\" style=\"width: 796px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122954 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-32.png\" alt=\"\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u308b\u306e\u306f\u5b9f\u969b\u306b\u306fjpeg\u3067\u306f\u306a\u304f\u5b9f\u884c\u7528\u306e\u3055\u3089\u306a\u308bPowerShell\u30b3\u30fc\u30c9\u3067\u3059\u3002\u4ee5\u4e0b\u3067\u306f\u8907\u6570\u306ebyte\u578b\u914d\u5217\u3092\u5c55\u958b\u3057\u3066\u30e1\u30e2\u30ea\u306b\u30ed\u30fc\u30c9\u3057\u3066\u3044\u308b\u69d8\u5b50\u304c\u898b\u3066\u53d6\u308c\u307e\u3059\u3002\" width=\"796\" height=\"698\" \/><figcaption id=\"caption-attachment-122954\" class=\"wp-caption-text\">\u56f38 \u7b2c2\u6bb5\u968e<\/figcaption><\/figure>\n<p>\u3053\u3053\u3067\u306f\u5b9f\u884c\u90e8\u5206\u3092\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u3066\u3001byte\u578b\u914d\u5217\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3059\u3088\u3046\u306b\u30b5\u30f3\u30d7\u30eb\u3092\u4fee\u6b63\u3059\u308c\u3070\u3088\u3044\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_122956\" aria-describedby=\"caption-attachment-122956\" style=\"width: 937px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-122956 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2022\/05\/word-image-33.png\" alt=\"\u56f39 byte\u578b\u914d\u5217\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080\" width=\"937\" height=\"134\" \/><figcaption id=\"caption-attachment-122956\" class=\"wp-caption-text\">\u56f39 byte\u578b\u914d\u5217\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u3080<\/figcaption><\/figure>\n<h2><a id=\"final-agent-tesla-payload\"><\/a>\u6700\u7d42\u6bb5\u968e\u306eAgent Tesla\u30da\u30a4\u30ed\u30fc\u30c9<\/h2>\n<p>\u3053\u308c\u3067\u3001\u30ed\u30fc\u30c0\u30fcDLL\u304c<span class=\"lang:default decode:true  crayon-inline \">$decompressedByteArray<\/span>\u00a0 (SHA256: 0fd2e47d373e07488748ac63d9229fdef4fd83d51cf6da79a10628765956de7a)\u306b\u6b8b\u308a\u3001gzip\u5727\u7e2e\u3055\u308c\u305fAgent Tesla\u304c<span class=\"lang:default decode:true  crayon-inline \">$vhRo<\/span>\u00a0 (SHA256: c684f1a6ec49214eba61175303bcaacb91dc0eba75abd0bd0e2407f3e65bce2a)\u306b\u6b8b\u308a\u307e\u3059\u3002\u30ed\u30fc\u30c0\u30fcDLL\u306fAgent Tesla\u3092RegAsm.exe\u30d7\u30ed\u30bb\u30b9\u306b\u30ed\u30fc\u30c9\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306eAgent Tesla\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001FTP\u3067ftp.videoalliance[.]ru\u306b\u63a5\u7d9a\u3057\u3066\u30c7\u30fc\u30bf\u3092\u6f0f\u51fa\u3057\u307e\u3059\u3002<\/p>\n<h2><a id=\"conclusion\"><\/a>\u7d50\u8ad6<\/h2>\n<p>\u8105\u5a01\u30a2\u30af\u30bf\u30fc\u306f\u60aa\u8cea\u306a\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u914d\u4fe1\u3059\u308b\u305f\u3081\u306e\u72ec\u5275\u7684\u624b\u53e3\u3092\u6a21\u7d22\u3057\u3066\u3044\u307e\u3059\u3002\u914d\u4fe1\u3067\u3088\u304f\u5229\u7528\u3055\u308c\u308b\u306e\u306f\u6587\u66f8\u3084\u30b9\u30af\u30ea\u30d7\u30c8\u306a\u3069\u3067\u3059\u304c\u3001Microsoft Compiled HTML\u30d5\u30a1\u30a4\u30eb(.chm)\u3082\u30a2\u30af\u30bf\u30fc\u306b\u60aa\u7528\u3055\u308c\u3046\u308b\u30d5\u30a1\u30a4\u30eb\u5f62\u5f0f\u3067\u3059\u3002\u3068\u304f\u306b\u77e5\u3089\u306a\u3044\u9001\u4fe1\u8005\u304b\u3089\u306e\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u306b\u306f\u6ce8\u610f\u3059\u308b\u3088\u3046\u306b\u30e6\u30fc\u30b6\u30fc\u3092\u6559\u80b2\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\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-xsoar\">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(NGFW)<\/a>\u306b\u3088\u308a\u3001\u540c\u69d8\u306e\u89e3\u6790\u5bfe\u7b56\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<p><span style=\"font-family: 'courier new', courier, monospace;\">3446ec621506d87d372c596e1d384d9fd2c1637b3655d7ccadf5d9f64678681e ORDER OF CONTRACT-pdf.7z<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">081fd54d8d4731bbea9a2588ca53672feef0b835dc9fa9855b020a352819feaa ORDER OF CONTRACT-pdf.chm<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">9ba024231d4aed094757324d8c65c35d605a51cdc1e18ae570f1b059085c2454 N2.jpg<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">0fd2e47d373e07488748ac63d9229fdef4fd83d51cf6da79a10628765956de7a GC.dll<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">c684f1a6ec49214eba61175303bcaacb91dc0eba75abd0bd0e2407f3e65bce2a Agent Tesla dotNet executable<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">hxxp:\/\/pk-consult[.]hr\/N2.jpg<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">ftp.videoalliance[.]ru<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 \u672c\u7a3f\u306fUnit 42\u306e\u78ba\u8a8d\u3057\u305f\u60aa\u8cea\u306a\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb(.chm)\u306b\u3088\u308b\u653b\u6483\u306e\u89e3\u8aac\u8a18\u4e8b\u3067\u3059\u3002\u307e\u305a\u3053\u306e\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u6790\u65b9\u6cd5\u3092\u3001\u3064\u304e\u306bJavaScript\u3084PowerShell\u306a\u3069\u591a\u6bb5\u968e\u306e\u653b\u6483\u30c1\u30a7<\/p>\n","protected":false},"author":39,"featured_media":134332,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4321,1974,4428],"tags":[5269,5366],"product_categories":[4346,4442,4444,4448,4456],"coauthors":[397],"class_list":["post-122972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-threat-research","category-malware-ja","category-threat-research-ja","tag-agenttesla-ja","tag-anti-analysis","product_categories-advanced-threat-prevention","product_categories-advanced-threat-prevention-ja","product_categories-advanced-wildfire-ja","product_categories-cortex-xdr-ja","product_categories-next-generation-firewall-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>\u6709\u5bb3\u306a\u30d8\u30eb\u30d7: Agent Tesla\u3092\u914d\u4fe1\u3059\u308b\u60aa\u6027\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb(.chm)\u306e\u5206\u6790<\/title>\n<meta name=\"description\" content=\"\u672c\u7a3f\u306fUnit 42\u306e\u78ba\u8a8d\u3057\u305f\u60aa\u8cea\u306a\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307fHTML\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb(.chm)\u306b\u3088\u308b\u653b\u6483\u306e\u89e3\u8aac\u8a18\u4e8b\u3067\u3059\u3002\u307e\u305a\u3053\u306e\u30d8\u30eb\u30d7\u30d5\u30a1\u30a4\u30eb\u306e\u5206\u6790\u65b9\u6cd5\u3092\u3001\u3064\u304e\u306bJavaScript\u3084PowerShell\u306a\u3069\u591a\u6bb5\u968e\u306e\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u304b\u3089\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u306b\u3044\u305f\u308b\u307e\u3067\u306e\u5206\u6790\u65b9\u6cd5\u3092\u9806\u306b\u7d39\u4ecb\u3057\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/unit42.paloaltonetworks.com\/ja\/malicious-compiled-html-help-file-agent-tesla\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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