{"id":139814,"date":"2021-08-11T23:43:44","date_gmt":"2021-08-12T06:43:44","guid":{"rendered":"https:\/\/www.paloaltonetworks.com\/blog\/?p=139814"},"modified":"2021-08-11T23:43:44","modified_gmt":"2021-08-12T06:43:44","slug":"protect-against-ransomware","status":"publish","type":"post","link":"https:\/\/origin-researchcenter.paloaltonetworks.com\/blog\/2021\/08\/protect-against-ransomware\/?lang=ja","title":{"rendered":"\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u5bfe\u7b56\u306f\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u306e\u767a\u751f\u524d\u306b"},"content":{"rendered":"<p>\u6700\u8fd1\u306e<a href=\"https:\/\/unit42.paloaltonetworks.jp\/threat-brief-kaseya-vsa-ransomware-attacks\/\" rel=\"nofollow,noopener\" >REvil\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u30ae\u30e3\u30f3\u30b0\u306b\u3088\u308bKaseya VSA<\/a>\u3078\u306e\u653b\u6483\u3067\u306f\u3001Kaseya\u306e\u591a\u6570\u306e\u9867\u5ba2\u3082\u653b\u6483\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3057\u305f\u3002Kaseya\u306f\u81ea\u793e\u306e\u9867\u5ba2\u306b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u5229\u7528\u3092\u505c\u6b62\u3059\u308b\u3088\u3046\u7dca\u6025\u63d0\u8a00\u3092\u51fa\u3057\u3001\u591a\u6570\u306e\u9867\u5ba2\u304c\u305d\u306e\u6c42\u3081\u306b\u5fdc\u3058\u307e\u3057\u305f\u3002\u3053\u308c\u3092\u53d7\u3051\u3001\u5f0a\u793e\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u653b\u6483\u9818\u57df\u3092\u7ba1\u7406\u3059\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0Cortex Xpanse\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u653b\u6483\u8005\u306e\u76ee\u306b\u89e6\u308c\u308b\u8106\u5f31\u306aKaseya\u30b5\u30fc\u30d0\u30fc\u6570\u304c96\u30d1\u30fc\u30bb\u30f3\u30c8\u6e1b\u5c11\u3057\u305f\u3053\u3068\u3092\u691c\u51fa\u3057\u307e\u3057\u305f\u30027\u67082\u65e5\u6642\u70b9\u3067\u306f\u7d041,500\u53f0\u3060\u3063\u305f\u306e\u304c7\u67088\u65e5\u306b\u306f\u308f\u305a\u304b60\u53f0\u306b\u307e\u3067\u6e1b\u5c11\u3057\u305f\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u3046\u3057\u305f\u5bfe\u5fdc\u306e\u304a\u304b\u3052\u3067\u305d\u308c\u4ee5\u4e0a\u306e\u611f\u67d3\u3092\u9632\u3050\u3053\u3068\u306f\u3067\u304d\u305f\u3082\u306e\u306e\u3001\u540c\u6642\u306b\u6b8b\u5ff5\u306a\u4e8b\u60c5\u3082\u57a3\u9593\u898b\u3048\u3066\u304d\u307e\u3057\u305f\u3002\u30a2\u30e9\u30fc\u30c8\u3092\u3042\u3052\u3066\u91cd\u8981\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u614c\u3066\u3066\u906e\u65ad\u3059\u308b\u3068\u3044\u3046\u306e\u306f\u62e1\u5927\u3059\u308b\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u306e\u8513\u5ef6\u306b\u5bfe\u6297\u3059\u308b\u3046\u3048\u3067\u306e\u6700\u5584\u7b56\u3068\u306f\u3044\u3048\u307e\u305b\u3093\u3002\u6ce5\u7e04\u5f0f\u306e\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u5bfe\u5fdc\u3067\u306f\u4e8b\u696d\u3078\u306e\u5f71\u97ff\u306f\u907f\u3051\u3089\u308c\u307e\u305b\u3093\u3002\u305d\u3082\u305d\u3082\u3001\u76ee\u6a19\u306f\u653b\u6483\u3084\u4e8b\u696d\u3078\u306e\u5f71\u97ff\u3092\u672a\u7136\u306b\u9632\u3050\u3053\u3068\u306b\u3042\u308b\u306f\u305a\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u3078\u306e\u5099\u3048\u3092\u306f\u3058\u3081\u308b\u306a\u3089\u3070\u653b\u6483\u3092\u53d7\u3051\u308b<em>\u524d<\/em>\u306e\u4eca\u304c\u6700\u9069\u306a\u30bf\u30a4\u30df\u30f3\u30b0\u3060\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<h2>\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u306e\u8105\u5a01\u306f\u62e1\u5927\u3059\u308b<\/h2>\n<p><a href=\"https:\/\/unit42.paloaltonetworks.jp\/revil-threat-actors\/\" rel=\"nofollow,noopener\" >REvil\u306e\u653b\u6483<\/a>\u306f\u3001\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u30ae\u30e3\u30f3\u30b0\u304c\u8cea\u91cf\u3068\u3082\u306b\u6210\u9577\u3092\u7d9a\u3051\u3066\u3044\u308b\u3053\u3068\u3001\u5f7c\u3089\u304c\u3088\u308a\u5927\u80c6\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3001\u304d\u308f\u3081\u3066\u5927\u898f\u6a21\u3067\u5229\u76ca\u7387\u306e\u9ad8\u3044\u653b\u6483\u3092\u4ed5\u639b\u3051\u3089\u308c\u308b\u3088\u3046\u3001\u5f7c\u3089\u304c\u81ea\u3089\u3092\u5909\u3048\u3064\u3065\u3051\u3066\u3044\u308b\u3053\u3068\u3001\u3053\u308c\u3089\u3092\u793a\u3057\u305f\u6700\u65b0\u306e\u5146\u5019\u3068\u3044\u3048\u307e\u3059\u3002\u305d\u308c\u3082\u305d\u306e\u306f\u305a\u3001\u6295\u8cc7\u3078\u306e\u30ea\u30bf\u30fc\u30f3\u306f\u76ee\u3092\u898b\u5f35\u308b\u3082\u306e\u304c\u3042\u308a\u3001\u6355\u307e\u308b\u30ea\u30b9\u30af\u304c\u307b\u3068\u3093\u3069\u306a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p>REvil\u306e\u3053\u306e\u6700\u65b0\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u3067\u79c1\u305f\u3061\u306f\u3055\u3089\u306a\u308b\u5b66\u3073\u3092\u5f97\u307e\u3057\u305f\u3002\u305d\u308c\u306f\u3044\u3063\u3066\u307f\u308c\u3070\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u306e\u5378\u58f2\u3068\u3067\u3082\u547c\u3076\u3079\u304d\u30a2\u30d7\u30ed\u30fc\u30c1\u3067\u3001\u5f7c\u3089\u306fKaseya\u306e\u76f4\u63a5\u306e\u9867\u5ba2\u3092\u5c11\u6570\u611f\u67d3\u3055\u305b\u3001Kaseya\u81ea\u4f53\u306b\u305f\u3063\u305f1\u5ea6\u653b\u6483\u3092\u884c\u3046\u3053\u3068\u3067\u3001\u5f7c\u3089\u306e\u5148\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u591a\u304f\u3092\u611f\u67d3\u3055\u305b\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3059\u3002(<a href=\"https:\/\/www.kaseya.com\/potential-attack-on-kaseya-vsa\/\" rel=\"nofollow,noopener\">\u653b\u6483\u306b\u95a2\u3059\u308b\u30a2\u30c3\u30d7\u30c7\u30fc\u30c8<\/a>\u3067\u3001Kaseya\u306f\u300c60\u793e\u672a\u6e80\u300d\u306e\u76f4\u63a5\u306e\u9867\u5ba2\u304c\u5f71\u97ff\u3092\u53d7\u3051\u305f\u3053\u3068\u3001\u3055\u3089\u306b\u305d\u306e\u9867\u5ba2\u306e\u9867\u5ba2\u3067\u3042\u308b\u300c1,500\u793e\u672a\u6e80\u306e\u30c0\u30a6\u30f3\u30b9\u30c8\u30ea\u30fc\u30e0\u30d3\u30b8\u30cd\u30b9\u300d\u304c\u5f71\u97ff\u3092\u53d7\u3051\u305f\u3053\u3068\u3092\u8aac\u660e\u3057\u3066\u3044\u307e\u3059)\u3002\u3053\u306e\u3068\u304dREvil\u306f\u3001\u88ab\u5bb3\u8005\u304c\u8ab0\u3067\u3082\u4f7f\u3048\u308b\u6c4e\u7528\u306e\u5fa9\u53f7\u9375\u3068\u5f15\u304d\u63db\u3048\u306b\u3001\u4e00\u62ec\u30677,000\u4e07\u30c9\u30eb\uff08\u65e5\u672c\u5186\u3067\u304a\u3088\u305d77\u5104\u5186\u3002\u305d\u306e\u5f8c\u306f\u6e1b\u984d\u3057\u30665,000\u4e07\u30c9\u30eb\u3001\u65e5\u672c\u5186\u3067\u306f55\u5104\u5186\uff09\u3068\u3044\u3046\u76ee\u3092\u898b\u5f35\u308b\u3088\u3046\u306a\u8eab\u4ee3\u91d1\u3092\u8981\u6c42\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>6\u5e74\u524d\u306f\u8eab\u4ee3\u91d1\u8981\u6c42\u984d\u306f\u5e73\u5747\u30671\u4e07\u30c9\u30eb\u7a0b\u5ea6\u3067\u3057\u305f\u3002\u307e\u305f\u53bb\u5e74\u3067\u3044\u3048\u3070\u3001<a href=\"https:\/\/start.paloaltonetworks.jp\/unit-42-ransomware-threat-report\" rel=\"nofollow,noopener\" >2021 Unit 42 \u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u8105\u5a01\u30ec\u30dd\u30fc\u30c8<\/a>\u3067\u5e73\u5747\u8eab\u4ee3\u91d1\u8981\u6c42\u984d\u304c\u7d0485\u4e07\u30c9\u30eb\u306b\u4e0a\u3063\u305f\u3053\u3068\u3001\u305d\u306e\u5e74\u306e\u6700\u9ad8\u652f\u6255\u984d\u304c<a href=\"https:\/\/www.itgovernance.co.uk\/blog\/the-5-biggest-ransomware-pay-outs-of-all-time\" rel=\"nofollow,noopener\">500\u4e07\u30c9\u30eb\u4ee5\u4e0b<\/a>\u3060\u3063\u305f\u3053\u3068\u304c\u5831\u544a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4fb5\u5bb3\u306e\u61f8\u5ff5\u304c\u3042\u308a\u3001\u5f0a\u793e\u306b\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u30ec\u30b9\u30dd\u30f3\u30b9\u306b\u95a2\u3059\u308b\u3054\u76f8\u8ac7\u3092\u306a\u3055\u308a\u305f\u3044\u5834\u5408\u306f\u3001<a href=\"mailto:infojapan@paloaltonetworks.com\">infojapan@paloaltonetworks.com<\/a> \u307e\u3067\u96fb\u5b50\u30e1\u30fc\u30eb\u306b\u3066\u3054\u9023\u7d61\u304f\u3060\u3055\u3044 \uff08\u3054\u76f8\u8ac7\u306f\u5f0a\u793e\u88fd\u54c1\u306e\u304a\u5ba2\u69d8\u306b\u306f\u9650\u5b9a\u3055\u308c\u307e\u305b\u3093\uff09\u3002<\/p>\n<h2>\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u5bfe\u7b56\u306f\u4e8b\u524d\u6e96\u5099\u304b\u3089<\/h2>\n<p>\u706b\u707d\u3084\u5730\u9707\u306a\u3069\u306e\u81ea\u7136\u707d\u5bb3\u3092\u60f3\u5b9a\u3057\u305f\u4e8b\u696d\u5fa9\u65e7\u8a08\u753b\u3092\u304a\u6301\u3061\u306e\u65b9\u306f\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u653b\u6483\u3082\u81ea\u7136\u707d\u5bb3\u306b\u985e\u3059\u308b\u5f71\u97ff\u3092\u4e8b\u696d\u306b\u4e0e\u3048\u308b\u3082\u306e\u3067\u3059\u306e\u3067\u3001\u81ea\u7136\u707d\u5bb3\u540c\u69d8\u306e\u5099\u3048\u3092\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305a\u306f\u81ea\u5206\u81ea\u8eab\u306b\u6b21\u306e\u3088\u3046\u306a\u8cea\u554f\u3092\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li>\u653b\u6483\u8005\u306e\u7acb\u5834\u3067\u8003\u3048\u3066\u307f\u308b\u3002\u7686\u3055\u3093\u3068\u540c\u3058\u304f\u3089\u3044\u7d44\u7e54\u306b\u7cbe\u901a\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u4f55\u3092\u3055\u308c\u308b\u3068\u4e00\u756a\u56f0\u308a\u307e\u3059\u304b\u3002\u3069\u306e\u30c7\u30fc\u30bf\u306b\u3064\u3044\u3066\u691c\u8a0e\u30fb\u4fdd\u8b77\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304b\u3002<\/li>\n<li>\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u4e8b\u4f8b\u306e\u767a\u751f\u6642\u306b\u5099\u3048\u305f<a href=\"https:\/\/start.paloaltonetworks.com\/incident-response-plan-webinar.html\">\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5bfe\u5fdc\u8a08\u753b<\/a>\u3084\u30d7\u30ec\u30a4\u30d6\u30c3\u30af\u306f\u4f5c\u6210\u6e08\u307f\u3067\u3059\u304b\u3002\u7d44\u7e54\u306e\u4eba\u54e1\u3084\u65b0\u305f\u306b\u5c0e\u5165\u3055\u308c\u305f\u6280\u8853\u306a\u3069\u3067\u306a\u306b\u304b\u5909\u5316\u306f\u3042\u308a\u307e\u3057\u305f\u304b\u3002\u6700\u5f8c\u306b\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5bfe\u5fdc\u8a08\u753b\u3084\u30d7\u30ec\u30a4\u30d6\u30c3\u30af\u306e\u691c\u8a3c\u3068\u4fee\u6b63\u3092\u884c\u3063\u305f\u306e\u306f\u3044\u3064\u3067\u3059\u304b\u3002<\/li>\n<li>\u30b7\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3\u3001\u30da\u30cd\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3066\u691c\u77e5\u6a5f\u80fd\u3084\u5fdc\u7b54\u6a5f\u80fd\u306e\u30d7\u30ed\u30bb\u30b9\u3092\u691c\u8a3c\u3057\u307e\u3057\u305f\u304b\u3002\u8a08\u753b\u3068\u6a19\u6e96\u4f5c\u696d\u624b\u9806\u3068\u306e\u9593\u3067\u304d\u3061\u3093\u3068\u6574\u5408\u6027\u304c\u53d6\u308c\u3066\u3044\u307e\u3057\u305f\u304b\u3002<\/li>\n<li><a href=\"https:\/\/start.paloaltonetworks.com\/best-practices-backing-up-data.html\">\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/a>\u306f\u53d6\u3063\u3066\u3044\u307e\u3059\u304b\u3002\u6700\u3082\u91cd\u8981\u306a\u30c7\u30fc\u30bf\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u30aa\u30d5\u30e9\u30a4\u30f3\u3068\u30aa\u30d5\u30b5\u30a4\u30c8\u306e\u4e21\u65b9\u3067\u884c\u308f\u308c\u3066\u3044\u307e\u3059\u304b\u3002\u5fa9\u65e7\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3066\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u60f3\u5b9a\u3057\u305f\u3068\u304a\u308a\u306b\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3057\u305f\u304b\u3002<\/li>\n<li>\u6700\u5f8c\u306b\u3001\u6700\u60aa\u306e\u4e8b\u614b\u306b\u5099\u3048\u3066\u30b5\u30a4\u30d0\u30fc\u4fdd\u967a\u3068<a href=\"https:\/\/www.paloaltonetworks.com\/resources\/datasheets\/cybersecurity-expertise-retainer\">\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u30ec\u30b9\u30dd\u30f3\u30b9\u30ea\u30c6\u30fc\u30ca\u30fc<\/a>\u3092\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u304b\u3002<\/li>\n<\/ul>\n<p>\u91cd\u8981\u306a\u306e\u306f\u3001\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u653b\u6483\u3092\u53d7\u3051\u305f\u300c\u5f8c\u300d\u306b\u5909\u66f4\u3059\u308b\u3067\u3042\u308d\u3046\u3053\u3068\u3092\u300c\u4e88\u3081\u300d\u8003\u3048\u3066\u304a\u304d\u3001\u5b9f\u969b\u306e\u653b\u6483\u306e\u300c\u524d\u300d\u306b\u305d\u306e\u5909\u66f4\u3092\u884c\u3063\u3066\u304a\u304f\u65b9\u6cd5\u3092\u8003\u3048\u308b\u3053\u3068\u3067\u3059\u3002\u7686\u3055\u3093\u306b\u306f\u53cd\u6483\u3067\u304d\u308b\u529b\u304c\u3042\u308a\u307e\u3059\u3002\u3067\u3082\u305d\u308c\u306f\u521d\u3081\u306e\u5099\u3048\u3042\u308a\u304d\u3067\u3059\u3002<\/p>\n<p>\u30b5\u30a4\u30d0\u30fc\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u5c02\u9580\u5bb6\u30c1\u30fc\u30e0\u306b<a href=\"https:\/\/www.paloaltonetworks.com\/ransomware-readiness-assessment\">Ransomware Readiness Assessment\uff08\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u5bfe\u5fdc\u8a55\u4fa1\uff09<\/a>\u3092\u4f9d\u983c\u3059\u308b\u3053\u3068\u3082\u691c\u8a0e\u3057\u307e\u3057\u3087\u3046\u3002\u653b\u6483\u306b\u5bfe\u3057\u3066\u3069\u306e\u7a0b\u5ea6\u306e\u5099\u3048\u304c\u3042\u308b\u304b\u3092\u8a3a\u65ad\u3057\u3001\u673a\u4e0a\u6f14\u7fd2\u3092\u5b9f\u65bd\u3057\u3001\u4fee\u6b63\u3059\u3079\u304d\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u554f\u984c\u70b9\u3092\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u306eREvil\u30e9\u30f3\u30b5\u30e0\u30a6\u30a7\u30a2\u30ae\u30e3\u30f3\u30b0\u306b\u3088\u308bKaseya VSA\u3078\u306e\u653b\u6483\u3067\u306f\u3001Kaseya\u306e\u591a\u6570\u306e\u9867\u5ba2\u3082\u653b\u6483\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3057\u305f\u3002Kaseya\u306f\u81ea\u793e\u306e\u9867\u5ba2\u306b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306e\u5229\u7528\u3092\u505c\u6b62\u3059\u308b\u3088\u3046\u7dca\u6025\u63d0\u8a00\u3092\u51fa\u3057\u3001\u591a\u6570\u306e\u9867\u5ba2\u304c\u305d\u306e\u6c42\u3081\u306b\u5fdc\u3058\u307e\u3057\u305f\u3002\u3053\u308c\u3092\u53d7\u3051\u3001\u5f0a\u793e\u306e\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u653b\u6483\u9818\u57df\u3092\u7ba1\u7406\u3059\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0Cortex Xpanse\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u3067\u653b\u6483\u8005\u306e\u76ee\u306b\u89e6\u308c\u308b\u8106\u5f31\u306aKaseya\u30b5\u30fc\u30d0\u30fc\u6570\u304c96\u30d1\u30fc\u30bb\u30f3\u30c8\u6e1b\u5c11\u3057\u305f\u3053\u3068\u3092\u691c\u51fa\u3057\u307e\u3057\u305f\u30027\u67082\u65e5\u6642\u70b9\u3067\u306f\u7d041,500\u53f0\u3060\u3063\u305f\u306e\u304c7\u67088\u65e5\u306b\u306f\u308f\u305a\u304b60\u53f0\u306b\u307e\u3067\u6e1b\u5c11\u3057\u305f\u306e\u3067\u3059\u3002 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