{"id":917,"date":"2026-08-05T05:34:15","date_gmt":"2026-08-05T05:34:15","guid":{"rendered":"https:\/\/windowsreport.com\/ja\/greatness-phishing-service-%e3%81%8c-ringcentral-%e3%82%92%e3%81%aa%e3%82%8a%e3%81%99%e3%81%be%e3%81%97%e3%81%a6-microsoft-365-%e3%82%a2%e3%82%ab%e3%82%a6%e3%83%b3%e3%83%88%e3%82%92%e7%9b%97%e3%82%80\/"},"modified":"2026-08-05T05:34:15","modified_gmt":"2026-08-05T05:34:15","slug":"greatness-phishing-service-%e3%81%8c-ringcentral-%e3%82%92%e3%81%aa%e3%82%8a%e3%81%99%e3%81%be%e3%81%97%e3%81%a6-microsoft-365-%e3%82%a2%e3%82%ab%e3%82%a6%e3%83%b3%e3%83%88%e3%82%92%e7%9b%97%e3%82%80","status":"publish","type":"post","link":"https:\/\/windowsreport.com\/ja\/greatness-phishing-service-%e3%81%8c-ringcentral-%e3%82%92%e3%81%aa%e3%82%8a%e3%81%99%e3%81%be%e3%81%97%e3%81%a6-microsoft-365-%e3%82%a2%e3%82%ab%e3%82%a6%e3%83%b3%e3%83%88%e3%82%92%e7%9b%97%e3%82%80\/","title":{"rendered":"Greatness Phishing Service \u304c RingCentral \u3092\u306a\u308a\u3059\u307e\u3057\u3066 Microsoft 365 \u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u76d7\u3080"},"content":{"rendered":"\n<p>\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9\u300cGreatness\u300d\u304c\u73fe\u5728\u3001RingCentral\u3092\u507d\u88c5\u3057\u3001Adversary-in-the-Middle\u653b\u6483\u3084\u30c7\u30d0\u30a4\u30b9\u30b3\u30fc\u30c9\u653b\u6483\u3092\u901a\u3058\u3066Microsoft 365\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u7a83\u53d6\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>Greatness\u306f\u5f53\u521d\u3001\u5f93\u6765\u578b\u306e\u8a8d\u8a3c\u60c5\u5831\u7a83\u53d6\u578b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066\u904b\u7528\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u305d\u308c\u4ee5\u964d\u3001\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u6355\u6349\u3057\u3001\u4e00\u90e8\u306e\u591a\u8981\u7d20\u8a8d\u8a3c\u3092\u56de\u907f\u3067\u304d\u308b\u3001\u3088\u308a\u5e83\u7bc4\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3078\u3068\u9032\u5316\u3092\u9042\u3052\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u307e\u3067\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306f\u3001\u4e3b\u306b\u7c73\u56fd\u3001\u30ab\u30ca\u30c0\u3001\u82f1\u56fd\u3001\u30aa\u30fc\u30b9\u30c8\u30e9\u30ea\u30a2\u3001\u5357\u30a2\u30d5\u30ea\u30ab\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u6a19\u7684\u3068\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306fMicrosoft 365\u306b\u3068\u3069\u307e\u3089\u305a\u3001iCloud\u3001Yahoo\u3001Google Workspace\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u72d9\u3046\u653b\u6483\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u62e1\u5f35\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-attackers-impersonate-ringcentral-notifications\">\u653b\u6483\u8005\u304cRingCentral\u306e\u901a\u77e5\u3092\u507d\u88c5<\/h2>\n\n\n\n<p><a href=\"https:\/\/zerobec.com\/blog\/greatness-phaas-aitm-and-device-code-phishing\" target=\"_blank\" rel=\"noopener noreferrer\">ZeroBEC\u306e\u7814\u7a76\u8005<\/a>\u306f\u3001Greatness\u306e\u904b\u55b6\u8005\u304cRingCentral\u306e\u4fe1\u983c\u3055\u308c\u305f\u5730\u4f4d\u3092\u60aa\u7528\u3057\u3001\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4fdd\u8b77\u3092\u56de\u907f\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u653b\u6483\u8005\u306f\u3001service@ringcentral[.]com \u306e\u30a2\u30c9\u30ec\u30b9\u3092\u8a50\u79f0\u3057\u3001\u6b63\u898f\u306eRingCentral\u9867\u5ba2\u306b\u60aa\u610f\u306e\u3042\u308b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u30dc\u30a4\u30b9\u30e1\u30fc\u30eb\u901a\u77e5\u3084\u5f93\u696d\u54e1\u306e\u696d\u7e3e\u8a55\u4fa1\u30a2\u30e9\u30fc\u30c8\u3092\u88c5\u3063\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u5404\u30e1\u30fc\u30eb\u306b\u306f\u3001\u9001\u4fe1\u8005\u304c\u7d44\u7e54\u306e\u5dee\u51fa\u4eba\u30bb\u30fc\u30d5\u30ea\u30b9\u30c8\u3092\u901a\u3058\u3066\u627f\u8a8d\u3092\u53d7\u3051\u305f\u3068\u4e3b\u5f35\u3059\u308b\u507d\u306e\u901a\u77e5\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u3088\u3063\u3066\u3001\u30e1\u30fc\u30eb\u306e\u4fe1\u983c\u6027\u304c\u9ad8\u304f\u898b\u3048\u3001\u53d7\u4fe1\u8005\u306f\u57cb\u3081\u8fbc\u307e\u308c\u305f\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3088\u3046\u306b\u4fc3\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>ZeroBEC\u306b\u3088\u308b\u3068\u3001Microsoft Exchange\u306f\u3053\u308c\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u300cSpam Confidence Level -1\u300d\u3092\u5272\u308a\u5f53\u3066\u307e\u3057\u305f\u3002\u3053\u306e\u5206\u985e\u306b\u3088\u308a\u3001\u30e1\u30fc\u30eb\u306f\u901a\u5e38\u306e\u30b9\u30d1\u30e0\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u56de\u907f\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-greatness-steals-microsoft-365-authentication-tokens\">Greatness\u304cMicrosoft 365\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u7a83\u53d6<\/h3>\n\n\n\n<p>\u60aa\u610f\u306e\u3042\u308b\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u88ab\u5bb3\u8005\u306fGreatness\u904b\u55b6\u8005\u304c\u7ba1\u7406\u3059\u308b\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u4e00\u90e8\u306e\u88ab\u5bb3\u8005\u306f\u3001Microsoft\u306eAdversary-in-the-Middle\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30da\u30fc\u30b8\u306b\u5230\u9054\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u30da\u30fc\u30b8\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304cMFA\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b8c\u4e86\u3057\u305f\u5f8c\u3001\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u6355\u6349\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u4ed6\u306e\u88ab\u5bb3\u8005\u306f\u30c7\u30d0\u30a4\u30b9\u30b3\u30fc\u30c9\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u8a98\u5c0e\u3055\u308c\u3001Microsoft\u306e\u6b63\u898f\u306e\u8a8d\u8a3c\u30b7\u30b9\u30c6\u30e0\u3092\u901a\u3058\u3066\u3001\u653b\u6483\u8005\u304c\u5236\u5fa1\u3059\u308b\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u627f\u8a8d\u3059\u308b\u3088\u3046\u8aac\u5f97\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u30a2\u30af\u30bb\u30b9\u3092\u53d6\u5f97\u3057\u305f\u5f8c\u3001\u653b\u6483\u8005\u306f\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u3084\u5546\u7528VPN\u30b5\u30fc\u30d3\u30b9\u3092\u901a\u3058\u3066\u3001\u76d7\u307f\u51fa\u3057\u305fMicrosoft 365\u30c8\u30fc\u30af\u30f3\u3092\u518d\u5229\u7528\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u901a\u5e38\u306e\u30b5\u30a4\u30f3\u30a4\u30f3\u3092\u6539\u3081\u3066\u5b8c\u4e86\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u4fb5\u5bb3\u3057\u305f\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u4fb5\u5165\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-attackers-search-emails-teams-chats-and-cloud-files\">\u653b\u6483\u8005\u304c\u30e1\u30fc\u30eb\u3001Teams\u306e\u30c1\u30e3\u30c3\u30c8\u3001\u30af\u30e9\u30a6\u30c9\u30d5\u30a1\u30a4\u30eb\u3092\u691c\u7d22<\/h3>\n\n\n\n<p>\u653b\u6483\u8005\u306f\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4fb5\u5bb3\u3057\u305f\u5f8c\u3001Outlook\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3084Microsoft Teams\u306e\u4f1a\u8a71\u3092\u691c\u7d22\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001SharePoint\u30b5\u30a4\u30c8\u3001OneDrive\u30d5\u30a1\u30a4\u30eb\u3001\u9023\u7d61\u5148\u3001\u4e88\u5b9a\u8868\u3001\u767b\u9332\u6e08\u307f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3082\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3057\u305f\u3002\u60c5\u5831\u306e\u591a\u304f\u306fMicrosoft Graph\u3092\u901a\u3058\u3066\u53ce\u96c6\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u4e00\u90e8\u306e\u30b1\u30fc\u30b9\u3067\u306f\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u304c2\u9031\u9593\u4ee5\u4e0a\u306b\u308f\u305f\u3063\u3066\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u72b6\u614b\u3092\u7dad\u6301\u3057\u3001\u653b\u6483\u8005\u306b\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u30d3\u30b8\u30cd\u30b9\u60c5\u5831\u3092\u691c\u7d22\u3057\u3001\u8ffd\u52a0\u306e\u6a19\u7684\u3092\u7279\u5b9a\u3059\u308b\u6642\u9593\u3092\u4e0e\u3048\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-researchers-examine-possible-ringcentral-breach-connection\">\u7814\u7a76\u8005\u304cRingCentral\u4fb5\u5bb3\u3068\u306e\u95a2\u9023\u6027\u306e\u53ef\u80fd\u6027\u3092\u8abf\u67fb<\/h3>\n\n\n\n<p>RingCentral\u306f\u6700\u8fd1\u3001\u8105\u5a01\u30b0\u30eb\u30fc\u30d7\u300cShinyHunters\u300d\u304c\u4e3b\u5f35\u3059\u308b\u5225\u306e\u30c7\u30fc\u30bf\u4fb5\u5bb3\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u540c\u793e\u306f\u3001\u3053\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u304c\u9650\u3089\u308c\u305f\u6570\u306e\u9867\u5ba2\u306b\u5c5e\u3059\u308b\u60c5\u5831\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305f\u3068\u3057\u3001\u5bfe\u8c61\u306e\u9867\u5ba2\u306b\u76f4\u63a5\u9023\u7d61\u3092\u53d6\u3063\u3066\u3044\u308b\u3068\u8ff0\u3079\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>ZeroBEC\u306f\u3001Greatness\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u3053\u306e\u4fb5\u5bb3\u304b\u3089\u6709\u52b9\u306aRingCentral\u9867\u5ba2\u306e\u30ea\u30b9\u30c8\u3092\u5165\u624b\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u7814\u7a76\u8005\u3089\u306f\u3053\u308c\u3089\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u9593\u306e\u76f4\u63a5\u7684\u306a\u95a2\u9023\u6027\u3092\u78ba\u8a8d\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-organizations-should-review-email-allowlists\">\u7d44\u7e54\u306f\u30e1\u30fc\u30eb\u306e\u8a31\u53ef\u30ea\u30b9\u30c8\u3092\u898b\u76f4\u3059\u3079\u304d<\/h3>\n\n\n\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c1\u30fc\u30e0\u306f\u3001\u904e\u5ea6\u306b\u5e83\u7bc4\u306a\u4f8b\u5916\u304c\u306a\u3044\u304b\u3001\u5dee\u51fa\u4eba\u30bb\u30fc\u30d5\u30ea\u30b9\u30c8\u3068\u30e1\u30fc\u30eb\u306e\u8a31\u53ef\u30ea\u30b9\u30c8\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u7d44\u7e54\u306f\u3001\u5305\u62ec\u7684\u306a\u30c9\u30e1\u30a4\u30f3\u9664\u5916\u3092\u3001\u6709\u52b9\u306aSPF\u3001DKIM\u3001DMARC\u8a8d\u8a3c\u3082\u8981\u6c42\u3059\u308b\u30eb\u30fc\u30eb\u306b\u7f6e\u304d\u63db\u3048\u308b\u3079\u304d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u7ba1\u7406\u8005\u306f\u3001\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3001\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u3001\u307e\u305f\u306f\u5546\u7528VPN\u30a2\u30c9\u30ec\u30b9\u304b\u3089\u306e\u3001MFA\u627f\u8a8d\u6e08\u307f\u306eMicrosoft 365\u3078\u306e\u7570\u5e38\u306a\u30b5\u30a4\u30f3\u30a4\u30f3\u306b\u3064\u3044\u3066\u3082\u8abf\u67fb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u7ba1\u7406\u8005\u304c\u4fb5\u5bb3\u306e\u7591\u3044\u3092\u6301\u3063\u305f\u5834\u5408\u3001\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u30a2\u30af\u30bb\u30b9\u6a29\u3068\u66f4\u65b0\u30c8\u30fc\u30af\u30f3\u3092\u76f4\u3061\u306b\u53d6\u308a\u6d88\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001OAuth\u30a2\u30af\u30bb\u30b9\u8a31\u53ef\u3001Microsoft Graph\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3001\u767b\u9332\u6e08\u307f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3001Microsoft 365\u30b5\u30fc\u30d3\u30b9\u5168\u4f53\u306b\u308f\u305f\u308b\u30a2\u30af\u30bb\u30b9\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305d\u306e\u4ed6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u95a2\u9023\u30cb\u30e5\u30fc\u30b9\u3068\u3057\u3066\u3001Microsoft\u306f<a href=\"https:\/\/windowsreport.com\/ja\/microsoft%e3%80%81%e4%b8%96%e7%95%8c%e8%a6%8f%e6%a8%a1%e3%81%ae%e3%83%9b%e3%83%86%e3%83%abwi-fi%e3%83%9e%e3%83%ab%e3%82%a6%e3%82%a7%e3%82%a2%e3%82%ad%e3%83%a3%e3%83%b3%e3%83%9a%e3%83%bc%e3%83%b3\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u4e16\u754c\u7684\u306a\u30db\u30c6\u30ebWi-Fi\u30de\u30eb\u30a6\u30a7\u30a2\u30ad\u30e3\u30f3\u30da\u30fc\u30f3<\/a>\u3092\u767a\u898b\u3057\u3001<a href=\"https:\/\/windowsreport.com\/ja\/microsoft%e3%81%8cnuget-api%e3%82%ad%e3%83%bc%e3%81%ae%e6%9c%89%e5%8a%b9%e6%9c%9f%e9%96%93%e3%82%9230%e6%97%a5%e9%96%93%e3%81%ab%e7%9f%ad%e7%b8%ae%e3%81%97%e3%81%be%e3%81%97%e3%81%9f\/\" target=\"_blank\" rel=\"noopener noreferrer\">NuGet API\u30ad\u30fc\u306e\u6709\u52b9\u671f\u9593\u309230\u65e5\u9593\u306b\u77ed\u7e2e<\/a>\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u304cGoogle\u30d1\u30b9\u30ad\u30fc\u3092\u7a83\u53d6\u3067\u304d\u308b\u65b0\u305f\u306a\u624b\u6cd5\u3092\u767a\u898b\u3057\u305f\u3053\u3068\u3067\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u30ec\u30b9\u8a8d\u8a3c\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5168\u6027\u306b\u5bfe\u3059\u308b\u61f8\u5ff5\u304c\u3055\u3089\u306b\u9ad8\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>Via <a href=\"https:\/\/www.bleepingcomputer.com\/news\/security\/phishing-service-spoofs-ringcentral-to-steal-microsoft-365-accounts\/\" target=\"_blank\" rel=\"noopener noreferrer\">BleepingComputer<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9\u300cGreatness\u300d\u304c\u73fe\u5728\u3001RingCentral\u3092\u507d\u88c5\u3057\u3001Adversary-in-the-Middle\u653b\u6483\u3084\u30c7\u30d0\u30a4\u30b9\u30b3\u30fc\u30c9\u653b\u6483\u3092\u901a\u3058\u3066Microsoft 365\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u7a83\u53d6\u3057\u3066\u3044\u307e\u3059\u3002 Greatness\u306f\u5f53\u521d\u3001\u5f93\u6765\u578b\u306e\u8a8d\u8a3c\u60c5\u5831\u7a83\u53d6\u578b\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30b5\u30fc\u30d3\u30b9\u3068\u3057\u3066\u904b\u7528\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u305d\u308c\u4ee5\u964d\u3001\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u6355\u6349\u3057\u3001\u4e00\u90e8\u306e\u591a\u8981\u7d20\u8a8d\u8a3c\u3092\u56de\u907f\u3067\u304d\u308b\u3001\u3088\u308a\u5e83\u7bc4\u306a\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3078\u3068\u9032\u5316\u3092\u9042\u3052\u3066\u3044\u307e\u3059\u3002 \u3053\u308c\u307e\u3067\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306f\u3001\u4e3b\u306b\u7c73\u56fd\u3001\u30ab\u30ca\u30c0\u3001\u82f1\u56fd\u3001\u30aa\u30fc\u30b9\u30c8\u30e9\u30ea\u30a2\u3001\u5357\u30a2\u30d5\u30ea\u30ab\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u6a19\u7684\u3068\u3057\u3066\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306fMicrosoft 365\u306b\u3068\u3069\u307e\u3089\u305a\u3001iCloud\u3001Yahoo\u3001Google Workspace\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u72d9\u3046\u653b\u6483\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u62e1\u5f35\u3055\u308c\u3066\u3044\u307e\u3059\u3002 \u653b\u6483\u8005\u304cRingCentral\u306e\u901a\u77e5\u3092\u507d\u88c5 ZeroBEC\u306e\u7814\u7a76\u8005\u306f\u3001Greatness\u306e\u904b\u55b6\u8005\u304cRingCentral\u306e\u4fe1\u983c\u3055\u308c\u305f\u5730\u4f4d\u3092\u60aa\u7528\u3057\u3001\u30e1\u30fc\u30eb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4fdd\u8b77\u3092\u56de\u907f\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002 \u653b\u6483\u8005\u306f\u3001service@ringcentral[.]com \u306e\u30a2\u30c9\u30ec\u30b9\u3092\u8a50\u79f0\u3057\u3001\u6b63\u898f\u306eRingCentral\u9867\u5ba2\u306b\u60aa\u610f\u306e\u3042\u308b\u30e1\u30fc\u30eb\u3092\u9001\u4fe1\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306f\u3001\u30dc\u30a4\u30b9\u30e1\u30fc\u30eb\u901a\u77e5\u3084\u5f93\u696d\u54e1\u306e\u696d\u7e3e\u8a55\u4fa1\u30a2\u30e9\u30fc\u30c8\u3092\u88c5\u3063\u3066\u3044\u307e\u3057\u305f\u3002 \u5404\u30e1\u30fc\u30eb\u306b\u306f\u3001\u9001\u4fe1\u8005\u304c\u7d44\u7e54\u306e\u5dee\u51fa\u4eba\u30bb\u30fc\u30d5\u30ea\u30b9\u30c8\u3092\u901a\u3058\u3066\u627f\u8a8d\u3092\u53d7\u3051\u305f\u3068\u4e3b\u5f35\u3059\u308b\u507d\u306e\u901a\u77e5\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u3088\u3063\u3066\u3001\u30e1\u30fc\u30eb\u306e\u4fe1\u983c\u6027\u304c\u9ad8\u304f\u898b\u3048\u3001\u53d7\u4fe1\u8005\u306f\u57cb\u3081\u8fbc\u307e\u308c\u305f\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3088\u3046\u306b\u4fc3\u3055\u308c\u307e\u3057\u305f\u3002 ZeroBEC\u306b\u3088\u308b\u3068\u3001Microsoft Exchange\u306f\u3053\u308c\u3089\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306b\u300cSpam Confidence Level -1\u300d\u3092\u5272\u308a\u5f53\u3066\u307e\u3057\u305f\u3002\u3053\u306e\u5206\u985e\u306b\u3088\u308a\u3001\u30e1\u30fc\u30eb\u306f\u901a\u5e38\u306e\u30b9\u30d1\u30e0\u30d5\u30a3\u30eb\u30bf\u30ea\u30f3\u30b0\u3092\u56de\u907f\u3067\u304d\u307e\u3057\u305f\u3002 Greatness\u304cMicrosoft 365\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u7a83\u53d6 \u60aa\u610f\u306e\u3042\u308b\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u88ab\u5bb3\u8005\u306fGreatness\u904b\u55b6\u8005\u304c\u7ba1\u7406\u3059\u308b\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u306b\u30ea\u30c0\u30a4\u30ec\u30af\u30c8\u3055\u308c\u307e\u3057\u305f\u3002 \u4e00\u90e8\u306e\u88ab\u5bb3\u8005\u306f\u3001Microsoft\u306eAdversary-in-the-Middle\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u30da\u30fc\u30b8\u306b\u5230\u9054\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u30da\u30fc\u30b8\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304cMFA\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b8c\u4e86\u3057\u305f\u5f8c\u3001\u8a8d\u8a3c\u30c8\u30fc\u30af\u30f3\u3092\u6355\u6349\u3057\u307e\u3057\u305f\u3002 \u4ed6\u306e\u88ab\u5bb3\u8005\u306f\u30c7\u30d0\u30a4\u30b9\u30b3\u30fc\u30c9\u30d5\u30a3\u30c3\u30b7\u30f3\u30b0\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u8a98\u5c0e\u3055\u308c\u3001Microsoft\u306e\u6b63\u898f\u306e\u8a8d\u8a3c\u30b7\u30b9\u30c6\u30e0\u3092\u901a\u3058\u3066\u3001\u653b\u6483\u8005\u304c\u5236\u5fa1\u3059\u308b\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u627f\u8a8d\u3059\u308b\u3088\u3046\u8aac\u5f97\u3055\u308c\u307e\u3057\u305f\u3002 \u30a2\u30af\u30bb\u30b9\u3092\u53d6\u5f97\u3057\u305f\u5f8c\u3001\u653b\u6483\u8005\u306f\u4eee\u60f3\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u3084\u5546\u7528VPN\u30b5\u30fc\u30d3\u30b9\u3092\u901a\u3058\u3066\u3001\u76d7\u307f\u51fa\u3057\u305fMicrosoft 365\u30c8\u30fc\u30af\u30f3\u3092\u518d\u5229\u7528\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u901a\u5e38\u306e\u30b5\u30a4\u30f3\u30a4\u30f3\u3092\u6539\u3081\u3066\u5b8c\u4e86\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u4fb5\u5bb3\u3057\u305f\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u4fb5\u5165\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3057\u305f\u3002 \u653b\u6483\u8005\u304c\u30e1\u30fc\u30eb\u3001Teams\u306e\u30c1\u30e3\u30c3\u30c8\u3001\u30af\u30e9\u30a6\u30c9\u30d5\u30a1\u30a4\u30eb\u3092\u691c\u7d22 \u653b\u6483\u8005\u306f\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4fb5\u5bb3\u3057\u305f\u5f8c\u3001Outlook\u306e\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u3084Microsoft Teams\u306e\u4f1a\u8a71\u3092\u691c\u7d22\u3057\u307e\u3057\u305f\u3002 \u307e\u305f\u3001SharePoint\u30b5\u30a4\u30c8\u3001OneDrive\u30d5\u30a1\u30a4\u30eb\u3001\u9023\u7d61\u5148\u3001\u4e88\u5b9a\u8868\u3001\u767b\u9332\u6e08\u307f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3082\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3057\u305f\u3002\u60c5\u5831\u306e\u591a\u304f\u306fMicrosoft Graph\u3092\u901a\u3058\u3066\u53ce\u96c6\u3055\u308c\u307e\u3057\u305f\u3002 \u4e00\u90e8\u306e\u30b1\u30fc\u30b9\u3067\u306f\u3001\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u304c2\u9031\u9593\u4ee5\u4e0a\u306b\u308f\u305f\u3063\u3066\u30a2\u30af\u30c6\u30a3\u30d6\u306a\u72b6\u614b\u3092\u7dad\u6301\u3057\u3001\u653b\u6483\u8005\u306b\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u30d3\u30b8\u30cd\u30b9\u60c5\u5831\u3092\u691c\u7d22\u3057\u3001\u8ffd\u52a0\u306e\u6a19\u7684\u3092\u7279\u5b9a\u3059\u308b\u6642\u9593\u3092\u4e0e\u3048\u307e\u3057\u305f\u3002 \u7814\u7a76\u8005\u304cRingCentral\u4fb5\u5bb3\u3068\u306e\u95a2\u9023\u6027\u306e\u53ef\u80fd\u6027\u3092\u8abf\u67fb RingCentral\u306f\u6700\u8fd1\u3001\u8105\u5a01\u30b0\u30eb\u30fc\u30d7\u300cShinyHunters\u300d\u304c\u4e3b\u5f35\u3059\u308b\u5225\u306e\u30c7\u30fc\u30bf\u4fb5\u5bb3\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002\u540c\u793e\u306f\u3001\u3053\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u304c\u9650\u3089\u308c\u305f\u6570\u306e\u9867\u5ba2\u306b\u5c5e\u3059\u308b\u60c5\u5831\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u305f\u3068\u3057\u3001\u5bfe\u8c61\u306e\u9867\u5ba2\u306b\u76f4\u63a5\u9023\u7d61\u3092\u53d6\u3063\u3066\u3044\u308b\u3068\u8ff0\u3079\u307e\u3057\u305f\u3002 ZeroBEC\u306f\u3001Greatness\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u3053\u306e\u4fb5\u5bb3\u304b\u3089\u6709\u52b9\u306aRingCentral\u9867\u5ba2\u306e\u30ea\u30b9\u30c8\u3092\u5165\u624b\u3057\u305f\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u7814\u7a76\u8005\u3089\u306f\u3053\u308c\u3089\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u9593\u306e\u76f4\u63a5\u7684\u306a\u95a2\u9023\u6027\u3092\u78ba\u8a8d\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002 \u7d44\u7e54\u306f\u30e1\u30fc\u30eb\u306e\u8a31\u53ef\u30ea\u30b9\u30c8\u3092\u898b\u76f4\u3059\u3079\u304d 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