{"id":409,"date":"2026-07-30T10:05:18","date_gmt":"2026-07-30T10:05:18","guid":{"rendered":"https:\/\/windowsreport.com\/ja\/owareaper%e3%83%90%e3%83%83%e3%82%af%e3%83%89%e3%82%a2%e3%81%8cmicrosoft-exchange%e3%83%a6%e3%83%bc%e3%82%b6%e3%83%bc%e3%82%92%e6%a8%99%e7%9a%84%e3%81%ab\/"},"modified":"2026-07-30T10:05:18","modified_gmt":"2026-07-30T10:05:18","slug":"owareaper%e3%83%90%e3%83%83%e3%82%af%e3%83%89%e3%82%a2%e3%81%8cmicrosoft-exchange%e3%83%a6%e3%83%bc%e3%82%b6%e3%83%bc%e3%82%92%e6%a8%99%e7%9a%84%e3%81%ab","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/ja\/owareaper%e3%83%90%e3%83%83%e3%82%af%e3%83%89%e3%82%a2%e3%81%8cmicrosoft-exchange%e3%83%a6%e3%83%bc%e3%82%b6%e3%83%bc%e3%82%92%e6%a8%99%e7%9a%84%e3%81%ab\/","title":{"rendered":"OWAReaper\u30d0\u30c3\u30af\u30c9\u30a2\u304cMicrosoft Exchange\u30e6\u30fc\u30b6\u30fc\u3092\u6a19\u7684\u306b"},"content":{"rendered":"\n<p>\u30ed\u30b7\u30a2\u653f\u5e9c\u652f\u63f4\u306e\u30cf\u30c3\u30ab\u30fc\u304c\u3001Microsoft Exchange Outlook Web Access\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3001\u9577\u671f\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30a2\u30af\u30bb\u30b9\u7528\u306b\u8a2d\u8a08\u3055\u308c\u305fWeb\u30e1\u30fc\u30eb\u30d0\u30c3\u30af\u30c9\u30a2\u300cOWAReaper\u300d\u3092\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306f\u3001Laundry Bear\u3084Void Blizzard\u3068\u3057\u3066\u77e5\u3089\u308c\u3001<a href=\"https:\/\/www.proofpoint.com\/us\/blog\/threat-insight\/cleaning-out-inboxes-ta488-comes-outlook-another-half-click-exploit\" target=\"_blank\" rel=\"noopener noreferrer\">Proofpoint<\/a>\u306b\u3088\u3063\u3066TA488\u3068\u3057\u3066\u8ffd\u8de1\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6a19\u7684\u306b\u306f\u3001\u7c73\u56fd\u3068\u6b27\u5dde\u306e\u653f\u5e9c\u6a5f\u95a2\u306e\u307b\u304b\u3001\u901a\u4fe1\u3001\u91d1\u878d\u3001\u30db\u30b9\u30d4\u30bf\u30ea\u30c6\u30a3\u3001\u822a\u7a7a\u5b87\u5b99\u4f01\u696d\u304c\u542b\u307e\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-attack-exploits-cve-2026-42897\">\u653b\u6483\u306fCVE-2026-42897\u3092\u60aa\u7528<\/h2>\n\n\n\n<p>\u3053\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306f\u3001<a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-42897\" target=\"_blank\" rel=\"noopener noreferrer\">CVE-2026-42897<\/a>\uff08Outlook Web Access\u306e\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30b9\u30af\u30ea\u30d7\u30c6\u30a3\u30f3\u30b0\u8106\u5f31\u6027\uff09\u3092\u60aa\u7528\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u6b20\u9665\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u304cOWA\u306e\u95b2\u89a7\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u7d30\u5de5\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3092\u958b\u304f\u3068\u3001\u60aa\u610f\u306e\u3042\u308bJavaScript\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u60aa\u610f\u306e\u3042\u308b\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3001\u30ea\u30f3\u30af\u3001\u8ffd\u52a0\u306e\u30af\u30ea\u30c3\u30af\u306f\u4e00\u5207\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>Microsoft\u306f5\u670814\u65e5\u306b\u3053\u306e\u8106\u5f31\u6027\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u304c\u3001\u5165\u624b\u53ef\u80fd\u306a\u8a3c\u62e0\u306f\u3001\u516c\u958b\u524d\u306bLaundry Bear\u304c\u65e2\u306b\u30bc\u30ed\u30c7\u30a4\u3068\u3057\u3066\u60aa\u7528\u3057\u3066\u3044\u305f\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u653b\u6483\u8005\u306f\u610f\u56f3\u7684\u306b\u3001\u3053\u308c\u3089\u306e\u30e1\u30fc\u30eb\u3092\u91cd\u8981\u3067\u306a\u3044\u3088\u3046\u306b\u898b\u305b\u304b\u3051\u307e\u3059\u3002\u53d7\u4fe1\u8005\u306f\u305d\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u958b\u304d\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u3057\u3066\u7121\u8996\u3057\u3001\u660e\u3089\u304b\u306a\u60aa\u610f\u306e\u3042\u308b\u30ea\u30f3\u30af\u3084\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u304c\u306a\u3044\u305f\u3081\u5831\u544a\u3092\u907f\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001SNS\u30a2\u30a4\u30b3\u30f3\u306eURL\u5185\u90e8\u306bJavaScript\u30ed\u30fc\u30c0\u30fc\u3068Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u96a0\u3057\u3066\u3044\u307e\u3059\u3002\u60aa\u610f\u306e\u3042\u308b\u30c7\u30fc\u30bf\u306f<code>#<\/code>\u6587\u5b57\u306e\u5f8c\u306b\u8868\u793a\u3055\u308c\u3001\u30e1\u30fc\u30eb\u3092\u653b\u6483\u3068\u3057\u3066\u8b58\u5225\u3057\u306b\u304f\u304f\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-owareaper-removes-evidence-and-collects-credentials\">OWAReaper\u304c\u8a3c\u62e0\u3092\u524a\u9664\u3057\u3001\u8cc7\u683c\u60c5\u5831\u3092\u53ce\u96c6<\/h3>\n\n\n\n<p>OWAReaper\u306f\u3001\u5b8c\u5168\u306bOutlook Web Access\u306e\u95b2\u89a7\u30a6\u30a3\u30f3\u30c9\u30a6\u5185\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001\u30d0\u30c3\u30af\u30c9\u30a2\u306fExchange\u30b5\u30fc\u30d0\u30fc\u4e0a\u306e\u5143\u306e\u30e1\u30fc\u30eb\u3092\u66f8\u304d\u63db\u3048\u3001\u60aa\u7528\u306e\u75d5\u8de1\u3092\u524a\u9664\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u306e\u5f8c\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3001Outlook\u306e\u69cb\u6210\u306e\u8a73\u7d30\u306a\u3069\u3001\u88ab\u5bb3\u8005\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u53ce\u96c6\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u306f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u3084\u30d6\u30e9\u30a6\u30b6\u306e\u81ea\u52d5\u5165\u529b\u6a5f\u80fd\u306b\u3088\u3063\u3066\u81ea\u52d5\u5165\u529b\u3055\u308c\u305f\u8cc7\u683c\u60c5\u5831\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3088\u3046\u3068\u3059\u308b\u4e0d\u53ef\u8996\u306e\u30d6\u30e9\u30a6\u30b6\u8981\u7d20\u3082\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>OWAReaper\u306f\u3001<code>ReadWriteMailbox<\/code>\u6a29\u9650\u3092\u6301\u3064Outlook\u30a2\u30c9\u30a4\u30f3\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u30a2\u30c9\u30a4\u30f3\u304c\u898b\u3064\u304b\u308b\u3068\u3001\u305d\u306e\u30a2\u30af\u30bb\u30b9\u6a29\u3092\u60aa\u7528\u3057\u3066OAuth\u30c8\u30fc\u30af\u30f3\u3092\u76d7\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mailbox-permissions-create-server-side-persistence\">\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u6a29\u9650\u304c\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u6c38\u7d9a\u6027\u3092\u5b9f\u73fe<\/h3>\n\n\n\n<p>\u3053\u306e\u30d0\u30c3\u30af\u30c9\u30a2\u306f\u3001\u3059\u3079\u3066\u306e\u30e1\u30fc\u30eb\u30d5\u30a9\u30eb\u30c0\u30fc\u306b\u5bfe\u3057\u3066Exchange Default\u30e6\u30fc\u30b6\u30fc\u306b\u6240\u6709\u8005\u30ec\u30d9\u30eb\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u6a29\u9650\u3092\u4ed8\u4e0e\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8a2d\u5b9a\u306b\u3088\u308a\u3001\u653b\u6483\u8005\u306f\u7d44\u7e54\u5185\u306e\u5225\u306e\u8a8d\u8a3c\u6e08\u307f\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u901a\u3058\u3066\u4fb5\u5bb3\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>Exchange\u304c\u3053\u308c\u3089\u306e\u6a29\u9650\u3092\u30b5\u30fc\u30d0\u30fc\u306b\u4fdd\u5b58\u3059\u308b\u305f\u3081\u3001\u88ab\u5bb3\u8005\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u3092\u518d\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u3082\u653b\u6483\u8005\u3092\u6392\u9664\u3067\u304d\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u60aa\u610f\u306e\u3042\u308b\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u6a29\u9650\u3068\u76d7\u307e\u308c\u305fOAuth\u30c8\u30fc\u30af\u30f3\u304c\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u307e\u307e\u3067\u3042\u308b\u5834\u5408\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5909\u66f4\u3057\u3066\u3082\u30a2\u30af\u30bb\u30b9\u3092\u30d6\u30ed\u30c3\u30af\u3067\u304d\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>OWAReaper\u306f\u3001Outlook Web Access\u306e\u30aa\u30d5\u30e9\u30a4\u30f3\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u901a\u3058\u3066\u3082\u3046\u4e00\u3064\u306e\u6c38\u7d9a\u5316\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002OWA\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6709\u52b9\u306b\u3057\u3001\u30d6\u30e9\u30a6\u30b6\u306eIndexedDB\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u4fdd\u5b58\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u60aa\u610f\u306e\u3042\u308biframe\u3092\u6ce8\u5165\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306eiframe\u306f\u3001\u88ab\u5bb3\u8005\u304c\u30aa\u30d5\u30e9\u30a4\u30f3\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u7d30\u5de5\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u958b\u304f\u305f\u3073\u306b\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u624b\u6cd5\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u6a29\u9650\u3068\u306f\u5225\u306b\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-commands-hidden-in-github-and-email-messages\">GitHub\u3068\u30e1\u30fc\u30eb\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u96a0\u3055\u308c\u305f\u30b3\u30de\u30f3\u30c9<\/h3>\n\n\n\n<p>OWAReaper\u306f\u30012\u3064\u306e\u30b3\u30de\u30f3\u30c9\uff06\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u65b9\u6cd5\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>1\u3064\u76ee\u306f\u3001GitHub\u306e\u30b3\u30df\u30c3\u30c8\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u96a0\u3055\u308c\u305f\u6697\u53f7\u5316\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u307e\u3059\u30022\u3064\u76ee\u306f\u3001\u4fb5\u5bb3\u3055\u308c\u305f\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u306b\u76f4\u63a5\u9001\u4fe1\u3055\u308c\u308b\u7279\u5225\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u305f\u30e1\u30fc\u30eb\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30c7\u30fc\u30bf\u7a83\u53d6\u306b\u306f\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u306f\u4e3b\u306b\u753b\u50cf\u30b3\u30f3\u30c6\u30f3\u30c4\u914d\u4fe1\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30c9\u30e1\u30a4\u30f3\u3092\u4ecb\u3057\u3066HTTPS\u3067\u6697\u53f7\u5316\u60c5\u5831\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u30ea\u30af\u30a8\u30b9\u30c8\u30d1\u30b9\u5185\u306b\u914d\u7f6e\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092AES-CTR\u3067\u6697\u53f7\u5316\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30d7\u30e9\u30a4\u30de\u30ea\u30e1\u30bd\u30c3\u30c9\u304c\u5931\u6557\u3057\u305f\u5834\u5408\u3001\u30bb\u30ab\u30f3\u30c0\u30ea\u30c1\u30e3\u30cd\u30eb\u304c\u76d7\u3093\u3060\u60c5\u5831\u3092\u653b\u6483\u8005\u306e\u5236\u5fa1\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u306b\u76f4\u63a5\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-organizations-should-review-exchange-permissions\">\u7d44\u7e54\u306fExchange\u6a29\u9650\u3092\u78ba\u8a8d\u3059\u3079\u304d<\/h3>\n\n\n\n<p>Proofpoint\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u30c9\u30e1\u30a4\u30f3\u3084\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3068\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u542b\u3080HTML\u306a\u3069\u3001\u9650\u5b9a\u7684\u306a\u4fb5\u5bb3\u6307\u6a19\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u7d44\u7e54\u306f\u3001CVE-2026-42897\u306eMicrosoft\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3001Exchange\u74b0\u5883\u306b\u4fb5\u5bb3\u306e\u5146\u5019\u304c\u306a\u3044\u304b\u8abf\u67fb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u7ba1\u7406\u8005\u306f\u4ee5\u4e0b\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Default\u30e6\u30fc\u30b6\u30fc\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u6a29\u9650<\/li>\n\n\n\n<li>\u5e83\u7bc4\u306a\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30a2\u30af\u30bb\u30b9\u3092\u6301\u3064Outlook\u30a2\u30c9\u30a4\u30f3<\/li>\n\n\n\n<li>\u4e0d\u5be9\u306aOAuth\u30c8\u30fc\u30af\u30f3\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3<\/li>\n\n\n\n<li>\u7570\u5e38\u306aGitHub API\u30ea\u30af\u30a8\u30b9\u30c8<\/li>\n\n\n\n<li>OWA\u30ad\u30e3\u30c3\u30b7\u30e5\u306b\u4fdd\u5b58\u3055\u308c\u305f\u6f5c\u5728\u7684\u306b\u60aa\u610f\u306e\u3042\u308b\u30e1\u30c3\u30bb\u30fc\u30b8<\/li>\n<\/ul>\n\n\n\n<p>\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u30ea\u30bb\u30c3\u30c8\u3084\u30c7\u30d0\u30a4\u30b9\u306e\u518d\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3067\u306f\u3001\u653b\u6483\u8005\u304c\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u6a29\u9650\u3068\u30aa\u30d5\u30e9\u30a4\u30f3\u30ad\u30e3\u30c3\u30b7\u30e5\u3055\u308c\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u901a\u3058\u3066\u30a2\u30af\u30bb\u30b9\u3092\u7dad\u6301\u3067\u304d\u308b\u305f\u3081\u3001OWAReaper\u3092\u5b8c\u5168\u306b\u524a\u9664\u3067\u304d\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30cb\u30e5\u30fc\u30b9\u3067\u306f\u3001\u30cf\u30c3\u30ab\u30fc\u304c\u30db\u30c6\u30eb\u306eWi-Fi\u3092\u4f7f\u7528\u3057\u3066Microsoft 365\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u76d7\u3080\u4e8b\u4f8b\u304c\u767a\u898b\u3055\u308c\u3066\u3044\u308b\u4e00\u65b9\u3001Chaos\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u306fmsaRAT\u3092\u4f7f\u7528\u3057\u3066Chrome\u304a\u3088\u3073Edge\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3092\u96a0\u853d\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u65b0\u305f\u306a\u30b5\u30a4\u30d0\u30fc\u8105\u5a01\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u3001Microsoft\u306f\u65b0\u3057\u3044MAI-Cyber-1-Flash\u30e2\u30c7\u30eb\u3082\u30ea\u30ea\u30fc\u30b9\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/russian-hackers-exploit-exchange-owa-zero-day-for-long-term-mailbox-access\/\" target=\"_blank\" rel=\"noopener noreferrer\">BleepingComputer<\/a> \u7d4c\u7531<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30ed\u30b7\u30a2\u653f\u5e9c\u652f\u63f4\u306e\u30cf\u30c3\u30ab\u30fc\u304c\u3001Microsoft Exchange Outlook Web Access\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3001\u9577\u671f\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30a2\u30af\u30bb\u30b9\u7528\u306b\u8a2d\u8a08\u3055\u308c\u305fWeb\u30e1\u30fc\u30eb\u30d0\u30c3\u30af\u30c9\u30a2\u300cOWAReaper\u300d\u3092\u5c55\u958b\u3057\u3066\u3044\u307e\u3059\u3002 \u3053\u306e\u30b0\u30eb\u30fc\u30d7\u306f\u3001Laundry Bear\u3084Void Blizzard\u3068\u3057\u3066\u77e5\u3089\u308c\u3001Proofpoint\u306b\u3088\u3063\u3066TA488\u3068\u3057\u3066\u8ffd\u8de1\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6a19\u7684\u306b\u306f\u3001\u7c73\u56fd\u3068\u6b27\u5dde\u306e\u653f\u5e9c\u6a5f\u95a2\u306e\u307b\u304b\u3001\u901a\u4fe1\u3001\u91d1\u878d\u3001\u30db\u30b9\u30d4\u30bf\u30ea\u30c6\u30a3\u3001\u822a\u7a7a\u5b87\u5b99\u4f01\u696d\u304c\u542b\u307e\u308c\u307e\u3059\u3002 \u653b\u6483\u306fCVE-2026-42897\u3092\u60aa\u7528 \u3053\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306f\u3001CVE-2026-42897\uff08Outlook Web Access\u306e\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30b9\u30af\u30ea\u30d7\u30c6\u30a3\u30f3\u30b0\u8106\u5f31\u6027\uff09\u3092\u60aa\u7528\u3057\u307e\u3059\u3002 \u3053\u306e\u6b20\u9665\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u304cOWA\u306e\u95b2\u89a7\u30a6\u30a3\u30f3\u30c9\u30a6\u3067\u7d30\u5de5\u3055\u308c\u305f\u30e1\u30fc\u30eb\u3092\u958b\u304f\u3068\u3001\u60aa\u610f\u306e\u3042\u308bJavaScript\u304c\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002\u60aa\u610f\u306e\u3042\u308b\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u3001\u30ea\u30f3\u30af\u3001\u8ffd\u52a0\u306e\u30af\u30ea\u30c3\u30af\u306f\u4e00\u5207\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002 Microsoft\u306f5\u670814\u65e5\u306b\u3053\u306e\u8106\u5f31\u6027\u3092\u516c\u958b\u3057\u307e\u3057\u305f\u304c\u3001\u5165\u624b\u53ef\u80fd\u306a\u8a3c\u62e0\u306f\u3001\u516c\u958b\u524d\u306bLaundry Bear\u304c\u65e2\u306b\u30bc\u30ed\u30c7\u30a4\u3068\u3057\u3066\u60aa\u7528\u3057\u3066\u3044\u305f\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002 \u653b\u6483\u8005\u306f\u610f\u56f3\u7684\u306b\u3001\u3053\u308c\u3089\u306e\u30e1\u30fc\u30eb\u3092\u91cd\u8981\u3067\u306a\u3044\u3088\u3046\u306b\u898b\u305b\u304b\u3051\u307e\u3059\u3002\u53d7\u4fe1\u8005\u306f\u305d\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u958b\u304d\u3001\u8ff7\u60d1\u30e1\u30fc\u30eb\u3068\u3057\u3066\u7121\u8996\u3057\u3001\u660e\u3089\u304b\u306a\u60aa\u610f\u306e\u3042\u308b\u30ea\u30f3\u30af\u3084\u6dfb\u4ed8\u30d5\u30a1\u30a4\u30eb\u304c\u306a\u3044\u305f\u3081\u5831\u544a\u3092\u907f\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002 \u3053\u308c\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001SNS\u30a2\u30a4\u30b3\u30f3\u306eURL\u5185\u90e8\u306bJavaScript\u30ed\u30fc\u30c0\u30fc\u3068Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u96a0\u3057\u3066\u3044\u307e\u3059\u3002\u60aa\u610f\u306e\u3042\u308b\u30c7\u30fc\u30bf\u306f#\u6587\u5b57\u306e\u5f8c\u306b\u8868\u793a\u3055\u308c\u3001\u30e1\u30fc\u30eb\u3092\u653b\u6483\u3068\u3057\u3066\u8b58\u5225\u3057\u306b\u304f\u304f\u3057\u3066\u3044\u307e\u3059\u3002 OWAReaper\u304c\u8a3c\u62e0\u3092\u524a\u9664\u3057\u3001\u8cc7\u683c\u60c5\u5831\u3092\u53ce\u96c6 OWAReaper\u306f\u3001\u5b8c\u5168\u306bOutlook Web Access\u306e\u95b2\u89a7\u30a6\u30a3\u30f3\u30c9\u30a6\u5185\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001\u30d0\u30c3\u30af\u30c9\u30a2\u306fExchange\u30b5\u30fc\u30d0\u30fc\u4e0a\u306e\u5143\u306e\u30e1\u30fc\u30eb\u3092\u66f8\u304d\u63db\u3048\u3001\u60aa\u7528\u306e\u75d5\u8de1\u3092\u524a\u9664\u3057\u307e\u3059\u3002 \u305d\u306e\u5f8c\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u30e6\u30fc\u30b6\u30fc\u540d\u3001Outlook\u306e\u69cb\u6210\u306e\u8a73\u7d30\u306a\u3069\u3001\u88ab\u5bb3\u8005\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u53ce\u96c6\u3057\u307e\u3059\u3002 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