{"id":117400,"date":"2021-03-09T18:33:31","date_gmt":"2021-03-10T02:33:31","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=117400"},"modified":"2021-03-11T16:46:55","modified_gmt":"2021-03-12T00:46:55","slug":"remediation-steps-for-the-microsoft-exchange-server-vulnerabilities","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/remediation-steps-for-the-microsoft-exchange-server-vulnerabilities\/","title":{"rendered":"Microsoft Exchange Server\u306e\u8106\u5f31\u6027\u306e\u4fee\u5fa9\u624b\u9806"},"content":{"rendered":"<h2><a id=\"post-117393-_i8ettj7qddvr\"><\/a>\u80cc\u666f<\/h2>\n<p>2021\u5e743\u67082\u65e5\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306b\u5bfe\u3057\u3001Microsoft Exchange Server\u306e4\u3064\u306e\u91cd\u5927\u306a\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\uff08<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26855\">CVE-2021-26855<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26857\">CVE-2021-26857<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-26858\">CVE-2021-26858<\/a>\u3001<a href=\"https:\/\/msrc.microsoft.com\/update-guide\/vulnerability\/CVE-2021-27065\">CVE-2021-27065<\/a>\uff09\u304c\u77e5\u3089\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<p>\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u306b\u3088\u308a\u3001\u653b\u6483\u8005\u306fExchange Server\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u88ab\u5bb3\u74b0\u5883\u306b\u9577\u671f\u306b\u308f\u305f\u3063\u3066\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002Microsoft Threat Intelligence Center\uff08MSTIC\uff09\u306f\u3001\u6700\u521d\u306e\u30ad\u30e3\u30f3\u30da\u30fc\u30f3\u306b\u3064\u3044\u3066\u3001\u9ad8\u3044\u78ba\u5ea6\u3067\u3053\u308c\u304c<a href=\"https:\/\/blogs.microsoft.com\/on-the-issues\/?p=64505\">HAFNIUM<\/a>\u3068\u3044\u3046\u4e2d\u56fd\u3067\u6d3b\u52d5\u3057\u3066\u3044\u308b\u56fd\u5bb6\u652f\u63f4\u306e\u30b0\u30eb\u30fc\u30d7\u304b\u3089\u306e\u3082\u306e\u3067\u3042\u308b\u3068\u8a55\u4fa1\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001MSTIC\u3001Unit 42\u3092\u542b\u3080\u8907\u6570\u306e\u8105\u5a01\u30a4\u30f3\u30c6\u30ea\u30b8\u30a7\u30f3\u30b9\u30c1\u30fc\u30e0\u306f\u3001\u8907\u6570\u306e\u8105\u5a01\u30a2\u30af\u30bf\u30fc\u304c\u3053\u308c\u3089\u306e\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\u3092\u5b9f\u969b\u306b\u60aa\u7528\u3057\u3066\u3044\u308b\u69d8\u5b50\u3092\u89b3\u6e2c\u3057\u3066\u3044\u307e\u3059\u3002\u4fb5\u5bb3\u3055\u308c\u305f\u53ef\u80fd\u6027\u306e\u3042\u308b\u63a8\u5b9a\u7d44\u7e54\u6570\u306f\u4e16\u754c\u6570\u4e07\u793e\u306b\u306e\u307c\u308a\u307e\u3059\u3002\u306a\u304a\u3001\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u306e\u63d0\u4f9b\u958b\u59cb\u306e\u5c11\u306a\u304f\u3068\u30822\u304b\u6708\u524d\u304b\u3089\u3001\u6d3b\u767a\u306b\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3055\u308c\u3066\u3044\u305f\u70b9\u304c\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u3064\u307e\u308a\u63d0\u4f9b\u958b\u59cb\u5f8c\u305f\u3060\u3061\u306b\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u9069\u7528\u3057\u305f\u5834\u5408\u3067\u3082\u3001Exchange Server\u304c\u4fb5\u5bb3\u3055\u308c\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002\u3055\u3089\u306b\u3001\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9Expanse\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u53ce\u96c6\u3055\u308c\u305f\u30c6\u30ec\u30e1\u30c8\u30ea\u306b\u57fa\u3065\u3051\u3070\u3001\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u9069\u7528\u3055\u308c\u3066\u3044\u306a\u3044Exchange Server\u306f\u3001\u4e16\u754c\u4e2d\u306b125,000\u53f0\u4ee5\u4e0a\u6b8b\u3063\u3066\u3044\u308b\u3068\u63a8\u6e2c\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306b\u3001\u7d44\u7e54\u74b0\u5883\u5185\u306b\u3042\u308b\u6f5c\u5728\u7684\u8105\u5a01\u3078\u306e\u5bfe\u5fdc\u306b\u3042\u305f\u308a\u53c2\u8003\u3068\u306a\u308b\u7c21\u6f54\u306a\u30d7\u30ec\u30a4\u30d6\u30c3\u30af\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-117393-_jtyfc7tpxson\"><\/a>1) \u7d44\u7e54\u5185\u306e\u5168Exchange Server\u3092\u7279\u5b9a\u3057\u3001\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u9069\u7528\u306e\u5fc5\u8981\u6027\u3092\u5224\u65ad\u3059\u308b<\/h2>\n<p>Exchange Online\u306f\u5f71\u97ff\u3092\u53d7\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>\u540c\u8106\u5f31\u6027\u304b\u3089\u306e\u5f71\u97ff\u3092\u53d7\u3051\u308bExchange Server \u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306f2013\u30012016\u30012019\u3067\u3059\u3002Exchange 2010\u306fExchange Server 2013\u30012016\u30012019\u3068\u540c\u3058\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u306b\u5bfe\u3059\u308b\u8106\u5f31\u6027\u3042\u308a\u307e\u305b\u3093\u304c\u3001Microsoft\u306fExchange 2010\u306eCVE-2021-26857\u7528\u306b<a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/description-of-the-security-update-for-microsoft-exchange-server-2010-service-pack-3-march-2-2021-kb5000978-894f27bf-281e-44f8-b9ba-dad705534459\">\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0<\/a>\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u540c\u793e\u306f\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u6e08\u307f\u306e\u53e4\u3044\u30d0\u30fc\u30b8\u30e7\u30f3\u306eExchange\u7528\u306b\u3064\u3044\u3066\u3082\u6700\u8fd1<a href=\"https:\/\/techcommunity.microsoft.com\/t5\/exchange-team-blog\/march-2021-exchange-server-security-updates-for-older-cumulative\/ba-p\/2192020\">\u8ffd\u52a0\u30ac\u30a4\u30c0\u30f3\u30b9<\/a>\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Microsoft\u306f\u3001\u3059\u3079\u3066\u306eExchange Server\u306b\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3053\u3068\u3001\u3068\u304f\u306b\u5916\u90e8\u3084\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u5411\u3044\u305f\u30b5\u30fc\u30d0\u30fc\u3092\u512a\u5148\u3057\u3066\u305d\u306e\u5bfe\u5fdc\u3092\u884c\u3046\u3053\u3068\u3092\u63a8\u5968\u3057\u3066\u3044\u307e\u3059\u3002Exchange Server\u304c\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u63a5\u7d9a\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3067\u3082\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u306a\u3093\u3089\u304b\u306e\u65b9\u6cd5\u3067\u5230\u9054\u53ef\u80fd\u306e\u5834\u5408\u3001\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u304c\u60aa\u7528\u3055\u308c\u308b\u53ef\u80fd\u6027\u306f\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Microsoft\u306fExchange Server\u306e\u6b21\u306e\u7279\u5b9a\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u66f4\u65b0\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/description-of-the-security-update-for-microsoft-exchange-server-2019-2016-and-2013-march-2-2021-kb5000871-9800a6bb-0a21-4ee7-b9da-fa85b3e1d23b\">Exchange Server 2019\uff08\u66f4\u65b0\u306b\u306f\u7d2f\u7a4d\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\uff08CU\uff098\u306a\u3044\u30577\u304c\u5fc5\u8981\uff09<\/a><\/p>\n<p><a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/description-of-the-security-update-for-microsoft-exchange-server-2019-2016-and-2013-march-2-2021-kb5000871-9800a6bb-0a21-4ee7-b9da-fa85b3e1d23b\">Exchange Server 2016\uff08\u66f4\u65b0\u306b\u306fCU19\u307e\u305f\u306fCU18\u304c\u5fc5\u8981\uff09<\/a><\/p>\n<p><a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/description-of-the-security-update-for-microsoft-exchange-server-2019-2016-and-2013-march-2-2021-kb5000871-9800a6bb-0a21-4ee7-b9da-fa85b3e1d23b\">Exchange Server 2013\uff08\u66f4\u65b0\u306b\u306fCU 23\u304c\u5fc5\u8981\uff09<\/a><\/p>\n<p><a href=\"https:\/\/support.microsoft.com\/en-us\/topic\/description-of-the-security-update-for-microsoft-exchange-server-2010-service-pack-3-march-2-2021-kb5000978-894f27bf-281e-44f8-b9ba-dad705534459\">Exchange Server 2010\uff08\u66f4\u65b0\u306b\u306fSP3\u307e\u305f\u306f\u4efb\u610f\u306eSP3 RU\u304c\u5fc5\u8981 - \u3053\u308c\u306f\u591a\u5c64\u9632\u5fa1\u306e\u66f4\u65b0\uff09<\/a><\/p>\n<h2><a id=\"post-117393-_s2okexzd43g\"><\/a>2) \u5168Exchange Server\u306b\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u9069\u7528\u3057\u3066\u4fdd\u8b77\u3059\u308b<\/h2>\n<p>\u3054\u4f7f\u7528\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306eExchange Server\u306e\u5b9a\u4f8b\u5916\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u307e\u3059\u3002<\/p>\n<p>Exchange Server\u3092\u305f\u3060\u3061\u306b\u66f4\u65b0\u3067\u304d\u306a\u3044\u5834\u5408\u3084\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3059\u3050\u306b\u9069\u7528\u3067\u304d\u306a\u3044\u5834\u5408\u306f\u3001\u3044\u304f\u3064\u304b<a href=\"https:\/\/msrc-blog.microsoft.com\/2021\/03\/05\/microsoft-exchange-server-vulnerabilities-mitigations-march-2021\/\">\u7de9\u548c\u7b56\u3068\u56de\u907f\u7b56<\/a>\u304c\u7528\u610f\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3001\u3053\u308c\u306b\u3088\u308a\u653b\u6483\u8005\u304cExchange Server\u3092\u60aa\u7528\u3059\u308b\u53ef\u80fd\u6027\u3092\u6e1b\u3089\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305f\u3060\u3057\u3053\u308c\u306f\u4fee\u6b63\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u9069\u7528\u5b8c\u4e86\u307e\u3067\u306e\u4e00\u6642\u7684\u51e6\u7f6e\u3068\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e<a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/next-generation-firewall\">\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\uff08NGFW\uff09<\/a>\u3067\u3001Exchange Server\u3078\u306e\u30a4\u30f3\u30d0\u30a6\u30f3\u30c9\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u5bfe\u3057\u3066SSL\u5fa9\u53f7\u3092\u6709\u52b9\u5316\u3057\u3001<a href=\"https:\/\/www.paloaltonetworks.jp\/products\/secure-the-network\/subscriptions\/threat-prevention\">\u8105\u5a01\u9632\u5fa1<\/a>\u3092Content Pack 8380\u4ee5\u964d\u306b\u66f4\u65b0\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u304b\u3089\u4fdd\u8b77\u3055\u308c\u307e\u3059\u3002<a href=\"https:\/\/www.paloaltonetworks.jp\/cortex\/cortex-xdr\">Cortex XDR<\/a>\u3092Exchange Server\u4e0a\u3067\u5b9f\u884c\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u3053\u308c\u3089\u306e\u653b\u6483\u3067\u3088\u304f\u4f7f\u7528\u3055\u308c\u308bWeb\u30b7\u30a7\u30eb\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u691c\u51fa\u30fb\u9632\u6b62\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u6700\u521d\u306e\u653b\u6483\u306b\u6210\u529f\u3059\u308b\u306b\u306f\u3001Exchange Server\u306e443\/tcp\u306b\u5bfe\u3057\u3001\u4fe1\u983c\u3055\u308c\u3066\u3044\u306a\u3044\u63a5\u7d9a\u3092\u78ba\u7acb\u3067\u304d\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u672a\u4fe1\u983c\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u30b7\u30b9\u30c6\u30e0\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3059\u308b\u3053\u3068\u3067\u3053\u308c\u3092\u9632\u3052\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u306b\u306f\u3001VPN\u3092\u4ecb\u3057\u3066\u3059\u3067\u306b\u8a8d\u8a3c\u3055\u308c\u3066\u3044\u308b\u30e6\u30fc\u30b6\u30fc\u304b\u3089\u306e\u30b7\u30b9\u30c6\u30e0\u30a2\u30af\u30bb\u30b9\u306e\u307f\u8a31\u53ef\u3059\u308b\u304b\u3001\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u30db\u30b9\u30c8\u306a\u3044\u3057IP\u7bc4\u56f2\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3057\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u3053\u306e\u7de9\u548c\u7b56\u306b\u3088\u308b\u4fdd\u8b77\u304c\u6709\u52b9\u3067\u3042\u308b\u306e\u306f\u653b\u6483\u306e\u6700\u521d\u306e\u6bb5\u968e\u306b\u5bfe\u3057\u3066\u306e\u307f\u3067\u3059\u3002\u653b\u6483\u8005\u304c\u3059\u3067\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306b\u30a2\u30af\u30bb\u30b9\u6e08\u307f\u306e\u5834\u5408\u3084\u3001\u7ba1\u7406\u8005\u306b\u60aa\u610f\u306e\u3042\u308b\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304b\u305b\u308b\u3053\u3068\u306b\u6210\u529f\u3057\u305f\u5834\u5408\u306f\u3001\u653b\u6483\u30c1\u30a7\u30fc\u30f3\u306e\u6b8b\u308a\u306e\u90e8\u5206\u3092\u30c8\u30ea\u30ac\u30fc\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b5\u30d6\u30b9\u30af\u30ea\u30d7\u30b7\u30e7\u30f3\u3092\u5099\u3048\u305f\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3001Cortex XSOAR\u306b\u3088\u308b\u81ea\u52d5\u5316\u3001Cortex XDR\u306b\u3088\u308b\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u4fdd\u8b77\u306a\u3069\u3001\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u88fd\u54c1\u306e\u4f7f\u7528\u306b\u95a2\u3059\u308b\u8a73\u7d30\u306f\u3053\u3061\u3089\u306e<a href=\"https:\/\/unit42.paloaltonetworks.jp\/microsoft-exchange-server-vulnerabilities\/\">\u8105\u5a01\u306e\u8a55\u4fa1<\/a>\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2><a id=\"post-117393-_jtyfc7tpxson\"><\/a>3) Exchange Server\u304c\u4fb5\u5bb3\u3092\u53d7\u3051\u305f\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b<\/h2>\n<p>\u3053\u308c\u3089\u306e\u8106\u5f31\u6027\u306f\u3059\u3067\u306b1\u304b\u6708\u4ee5\u4e0a\u306b\u308f\u305f\u3063\u3066\u5e83\u304f\u6d3b\u767a\u306a\u60aa\u7528\u304c\u898b\u3089\u308c\u3066\u304a\u308a\u3001\u60aa\u7528\u306e\u3082\u3063\u3068\u3082\u65e9\u3044\u5146\u5019\u306f2021\u5e741\u67083\u65e5\u306b\u307e\u3067\u3055\u304b\u306e\u307c\u308a\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u8106\u5f31\u6027\u306e\u3042\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u306eExchange Server\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u7d44\u7e54\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u4fb5\u5bb3\u6709\u7121\u3092\u8a55\u4fa1\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3092\u9069\u7528\u3057\u3066\u3082\u3001\u3059\u3067\u306b\u5c55\u958b\u3055\u308c\u3066\u3057\u307e\u3063\u305f\u30de\u30eb\u30a6\u30a7\u30a2\u304c\u524a\u9664\u3055\u308c\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002Outlook WebAccess\u304bExchange Web\u30b5\u30fc\u30d3\u30b9\u3092\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u516c\u958b\u3057\u3066\u3044\u308bExchange Server\u306b\u3064\u3044\u3066\u306f\u3001\u306a\u3093\u3089\u304b\u306e\u65b9\u6cd5\u3067\u5b89\u5168\u3067\u3042\u308b\u3068\u3044\u3046\u78ba\u8a8d\u304c\u3068\u308c\u306a\u3044\u304b\u304e\u308a\u3001\u4fb5\u5bb3\u3055\u308c\u305f\u3068\u307f\u306a\u3059\u306e\u304c\u8ce2\u660e\u3067\u3059\u3002<\/p>\n<p>Exchange \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30d7\u30ed\u30bb\u30b9\u3084\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u30a4\u30f3\u30d5\u30a9\u30e1\u30fc\u30b7\u30e7\u30f3\u30b5\u30fc\u30d3\u30b9\uff08IIS\uff09\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u7591\u308f\u3057\u3044\u30d7\u30ed\u30bb\u30b9\u3084\u30b7\u30b9\u30c6\u30e0\u4e0a\u306e\u632f\u308b\u821e\u3044\u3001\u305f\u3068\u3048\u3070PowerShell\u3001\u30b3\u30de\u30f3\u30c9\u30b7\u30a7\u30eb\uff08cmd.exe\uff09\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30a2\u30c9\u30ec\u30b9\u7a7a\u9593\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306a\u3069\u304c\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9Cortex XDR Pro\u306e\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u4fdd\u8b77\u3092\u4f7f\u7528\u3057\u3066\u3054\u4f7f\u7528\u4e2d\u306e\u74b0\u5883\u3067\u653b\u6483\u306e\u30cf\u30f3\u30c6\u30a3\u30f3\u30b0\u3092\u884c\u3046\u65b9\u6cd5\u306b\u3064\u3044\u3066\u306f\u300c<a href=\"https:\/\/blog.paloaltonetworks.com\/security-operations\/attacks-targeting-microsoft-exchange\/?lang=ja\">Microsoft Exchange Server\u3092\u6a19\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u653b\u6483\u306e\u635c\u7d22<\/a>\u300d\u3067\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u306e\u3067\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>Microsoft\u306f<a href=\"https:\/\/github.com\/microsoft\/CSS-Exchange\/tree\/main\/Security\">PowerShell\u3068Nmap\u30b9\u30af\u30ea\u30d7\u30c8<\/a>\u3092\u516c\u958b\u3057\u3001\u3053\u308c\u3089\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u3088\u308b\u4fb5\u5bb3\u306e\u5146\u5019\u304c\u306a\u3044\u304b\u3069\u3046\u304bExchange Server\u3092\u30c1\u30a7\u30c3\u30af\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u540c\u3058\u5834\u6240\u3067\u5225\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3082\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u3061\u3089\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u306f\u3001Exchange Server\u306e\u4eee\u60f3\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u3001\u7279\u5b9aExchange\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u60f3\u5b9a\u3055\u308c\u308b\u30d5\u30a1\u30a4\u30eb\u3068\u306e\u9055\u3044\u304c\u308f\u304b\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u7c73\u56fd\u306e\u30b5\u30a4\u30d0\u30fc\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a4\u30f3\u30d5\u30e9\u30b9\u30c8\u30e9\u30af\u30c1\u30e3\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5e81\uff08CISA\uff09\u3082<a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/aa21-062a\">TPP\uff08\u6226\u8853\u3001\u6280\u8853\u3001\u624b\u9806\uff09\u306e\u30ea\u30b9\u30c8\u3092\u516c\u958b<\/a>\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Unit 42\u306e\u8105\u5a01\u8a55\u4fa1\u306e\u884c\u52d5\u65b9\u91dd\u8868\u306b\u3082\u8a18\u8f09\u3057\u307e\u3057\u305f\u304c\u3001Exchange\u3078\u306e\u653b\u6483\u3092\u5b9f\u884c\u3059\u308b\u6700\u521d\u306e\u653b\u6483\u8005\u304c\u4f7f\u7528\u3057\u305f\u4fb5\u5165\u5f8c\u306eTTP\u306b\u306f\u3001\u6b21\u306e\u3082\u306e\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>Procdump\u3092\u4f7f\u3063\u3066LSASS\u30d7\u30ed\u30bb\u30b9\u30e1\u30e2\u30ea\u3092\u30c0\u30f3\u30d7\u3059\u308b<\/li>\n<li>7-Zip\u3092\u4f7f\u3063\u3066\u7a83\u53d6\u3057\u305f\u30c7\u30fc\u30bf\u3092ZIP\u30d5\u30a1\u30a4\u30eb\u306b\u5727\u7e2e\u3057\u3066\u6f0f\u51fa\u3059\u308b<\/li>\n<li>Exchange PowerShell\u30b9\u30ca\u30c3\u30d7\u30a4\u30f3\u3092\u8ffd\u52a0\u30fb\u4f7f\u7528\u3057\u3066\u30e1\u30fc\u30eb\u30dc\u30c3\u30af\u30b9\u30c7\u30fc\u30bf\u3092\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3059\u308b<\/li>\n<li>Nishang Invoke-PowerShellTcpOneLine\u30ea\u30d0\u30fc\u30b9\u30b7\u30a7\u30eb\u3092\u4f7f\u7528\u3059\u308b<\/li>\n<li>PowerCat\u3092GitHub\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305d\u308c\u3092\u4f7f\u3063\u3066\u30ea\u30e2\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u63a5\u7d9a\u3092\u958b\u304f<\/li>\n<\/ul>\n<p>\u6700\u521d\u306e\u653b\u6483\u4ee5\u964d\u3001\u4ed6\u306e\u30a2\u30af\u30bf\u30fc\u3082Exchange\u306e\u540c\u8106\u5f31\u6027\u3092\u30d5\u30eb\u6d3b\u7528\u3057\u3088\u3046\u3068\u3082\u304f\u308d\u3093\u3067\u3044\u308b\u3068\u4e88\u60f3\u3055\u308c\u307e\u3059\u304c\u3001\u305d\u306e\u52d5\u6a5f\u30fb\u76ee\u7684\u30fbTTP\u306f\u5927\u304d\u304f\u7570\u306a\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-117393-_ltnv6zte3ar\"><\/a>4) \u4fb5\u5bb3\u304c\u7591\u308f\u308c\u308b\u5834\u5408\u306f\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u5bfe\u5fdc\u30c1\u30fc\u30e0\u3078\u3054\u9023\u7d61\u3092<\/h2>\n<p>\u3059\u3067\u306b\u3044\u305a\u308c\u304b\u306e\u6642\u70b9\u3067Exchange Server\u304c\u4fb5\u5bb3\u3055\u308c\u3066\u3044\u308b\u3068\u8003\u3048\u3089\u308c\u308b\u5834\u5408\u3067\u3082\u3001\u5148\u306b\u8ff0\u3079\u305f\u540c\u8106\u5f31\u6027\u304b\u3089\u306eExchange Server\u4fdd\u8b77\u63aa\u7f6e\u306f\u8b1b\u3058\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306b\u3088\u308a\u3001\u307b\u304b\u306e\u653b\u6483\u8005\u304c\u30b7\u30b9\u30c6\u30e0\u3092\u3055\u3089\u306b\u4fb5\u5bb3\u3057\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3089\u3067\u3059\u3002\u306a\u304a\u3054\u4f7f\u7528\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306eExchange 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href=\"mailto:infojapan@paloaltonetworks.com\">infojapan@paloaltonetworks.com<\/a>\u3002<\/p>\n<h2><a id=\"post-117393-_54lzc2yh24po\"><\/a>\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9\uff1a<\/h2>\n<ol>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/china-chopper-webshell\/\">China Chopper Web\u30b7\u30a7\u30eb\u3092\u4f7f\u7528\u3057\u305fMicrosoft Exchange Server\u306b\u5bfe\u3059\u308b\u653b\u6483\u306e\u5206\u6790<\/a><\/li>\n<li><a href=\"https:\/\/unit42.paloaltonetworks.jp\/microsoft-exchange-server-vulnerabilities\/\">\u8105\u5a01\u306e\u8a55\u4fa1: Microsoft Exchange Server\u306b\u304a\u3051\u308b4\u3064\u306e\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\u306e\u60aa\u7528\u304c\u6d3b\u767a\u5316<\/a><\/li>\n<li><a href=\"https:\/\/blog.paloaltonetworks.com\/security-operations\/attacks-targeting-microsoft-exchange\/?lang=ja\">Microsoft Exchange Server\u3092\u6a19\u7684\u3068\u3057\u305f\u6700\u8fd1\u306e\u653b\u6483\u306e\u635c\u7d22<\/a><\/li>\n<li><a href=\"https:\/\/www.microsoft.com\/security\/blog\/2021\/03\/02\/hafnium-targeting-exchange-servers\/\">HAFNIUM targeting Exchange Servers with 0-day exploits<\/a><\/li>\n<li><a href=\"https:\/\/www.volexity.com\/blog\/2021\/03\/02\/active-exploitation-of-microsoft-exchange-zero-day-vulnerabilities\/\">Operation Exchange Marauder: Active Exploitation of Multiple Zero-Day Microsoft Exchange Vulnerabilities<\/a><\/li>\n<li><a href=\"https:\/\/blog.rapid7.com\/2021\/03\/03\/mass-exploitation-of-exchange-server-zero-day-cves-what-you-need-to-know\/\">Mass Exploitation of Exchange Server Zero-Day CVEs: What You Need to Know<\/a><\/li>\n<li><a href=\"https:\/\/msrc-blog.microsoft.com\/2021\/03\/02\/multiple-security-updates-released-for-exchange-server\/\">Multiple Security Updates Released for Exchange Server<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f 2021\u5e743\u67082\u65e5\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u306b\u5bfe\u3057\u3001Microsoft Exchange Server\u306e4\u3064\u306e\u91cd\u5927\u306a\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\uff08CVE-2021-26855\u3001CVE-2021-26857\u3001CVE-2021-26<\/p>\n","protected":false},"author":23,"featured_media":134396,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[4469,4428,4470],"tags":[5075,6019,6021,6022,5085],"product_categories":[4344,4465],"coauthors":[1025],"class_list":["post-117400","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vulnerabilities","category-threat-research-ja","category-vulnerabilities-ja","tag-cve-2021-26855-ja","tag-cve-2021-26857-ja","tag-cve-2021-26858-ja","tag-cve-2021-27065","tag-microsoft-exchange-server-ja","product_categories-unit-42-incident-response","product_categories-unit-42-incident-response-ja"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.0) - 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