{"id":130877,"date":"2023-10-26T06:00:42","date_gmt":"2023-10-26T13:00:42","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=130877"},"modified":"2024-06-19T23:18:21","modified_gmt":"2024-06-20T06:18:21","slug":"linux-pam-apis","status":"publish","type":"post","link":"https:\/\/origin-unit42.paloaltonetworks.com\/ja\/linux-pam-apis\/","title":{"rendered":"\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u60c5\u5831\u306e\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30c8\u3084\u64cd\u4f5c\u3092\u72d9\u3046 Linux \u7528\u30de\u30eb\u30a6\u30a7\u30a2\u306e PAM API \u60aa\u7528"},"content":{"rendered":"<h2><a id=\"post-130877-_f3hurvirgh3f\"><\/a>\u6982\u8981<\/h2>\n<p>\u672c\u7a3f\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u304a\u3051\u308b PAM (Pluggable Authenticaton Modules) \u306e API (application programming interface) \u5229\u7528\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u30b5\u30f3\u30c9\u30dc\u30c3\u30af\u30b9\u74b0\u5883\u3067\u306e PAM API \u76e3\u8996\u304c\u306a\u305c\u5f79\u306b\u7acb\u3064\u306e\u304b\u306b\u3064\u3044\u3066\u3082\u63d0\u793a\u3057\u307e\u3059\u3002<\/p>\n<p>PAM \u3068\u3044\u3046\u306e\u306f\u3001Linux \u30b7\u30b9\u30c6\u30e0\u3067\u8a8d\u8a3c (authentication) \u3084\u8a8d\u53ef (authorization) \u306b\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002Linux \u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u3088\u304f\u4f7f\u308f\u308c\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30b5\u30fc\u30d3\u30b9\u306e\u591a\u304f\u304c PAM \u306b\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001\u8a8d\u8a3c\u306b PAM API \u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001<span style=\"font-family: 'courier new', courier, monospace;\">SSH<\/span> \u30b5\u30fc\u30d3\u30b9\u3084 GNOME \u30c7\u30a3\u30b9\u30d7\u30ec\u30a4 \u30de\u30cd\u30fc\u30b8\u30e3\u30fc (<span style=\"font-family: 'courier new', courier, monospace;\">GDM<\/span>)\u3001\u30b7\u30b9\u30c6\u30e0 \u30b5\u30fc\u30d3\u30b9\u306e <span style=\"font-family: 'courier new', courier, monospace;\">sudo<\/span> \u306a\u3069\u3082 PAM API \u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>PAM \u306e\u8a2d\u8a08\u306f\u67d4\u8edf\u3067\u30e2\u30b8\u30e5\u30fc\u30eb\u5f0f\u3067\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u306e PAM API \u3092\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u306e\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30c8\u3084\u64cd\u4f5c\u306b\u4f7f\u3044\u305f\u3044\u3068\u8003\u3048\u308b\u653b\u6483\u8005\u306b\u3068\u3063\u3066\u3001PAM \u306f\u9b45\u529b\u7684\u306a\u6a19\u7684\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/advanced-wildfire\" target=\"_blank\" rel=\"noopener\">Advanced WildFire for Linux<\/a> \u306f\u3001\u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb (\u8cc7\u683c\u60c5\u5831) \u3078\u306e\u30a2\u30af\u30bb\u30b9\u306a\u3069\u306e\u6f5c\u5728\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8105\u5a01\u3092\u78ba\u5b9f\u306b\u7279\u5b9a\u3057\u3066\u8fc5\u901f\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306b\u3001PAM API \u306e\u4f7f\u7528\u72b6\u6cc1\u3092\u76e3\u8996\u3057\u3001\u30ed\u30b0\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<td style=\"width: 35%;\"><b>\u95a2\u9023\u3059\u308b Unit 42 \u306e\u30c8\u30d4\u30c3\u30af<\/b><\/td>\n<td style=\"width: 100%;\"><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/sandbox-ja\/\" target=\"_blank\" rel=\"noopener\"><b>Sandbox<\/b><\/a>, <strong><a href=\"https:\/\/unit42.paloaltonetworks.jp\/tag\/Linux-ja\/\" target=\"_blank\" rel=\"noopener\">Linux<\/a><\/strong><\/td>\n<\/tr>\n<\/thead>\n<\/table>\n<h2><a id=\"post-130877-_ghmyrbz3biph\"><\/a>\u6982\u8981<\/h2>\n<p>PAM \u306f Linux \u30b7\u30b9\u30c6\u30e0\u7528\u306e\u67d4\u8edf\u306a\u30e2\u30b8\u30e5\u30fc\u30eb\u5f0f\u306e\u8a8d\u8a3c\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u306e\u7ba1\u7406\u3092\u4e00\u5143\u7684\u306b\u884c\u3046\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u3066\u304f\u308c\u307e\u3059\u3002PAM \u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u8a2d\u8a08\u306f\u3001\u7279\u5b9a\u306e\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u30bf\u30b9\u30af\u3092\u51e6\u7406\u3059\u308b\u5171\u6709\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 \u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3067\u3042\u308b\u300cpluggable modules (\u30d7\u30e9\u30b0\u30a4\u30f3\u53ef\u80fd\u306a\u30e2\u30b8\u30e5\u30fc\u30eb)\u300d\u306e\u6982\u5ff5\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u500b\u5225\u306b\u958b\u767a\u3067\u304d\u3066\u3001PAM \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u30d7\u30e9\u30b0\u30a4\u30f3\u3059\u308c\u3070\u6a5f\u80fd\u3092\u62e1\u5f35\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>PAM \u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u4e00\u4f8b\u3068\u3057\u3066\u3001<span style=\"font-family: 'courier new', courier, monospace;\">pam_unix<\/span> \u304c\u3042\u3052\u3089\u308c\u307e\u3059\u3002\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u306f\u3001\u6614\u306a\u304c\u3089\u306e Unix \u30b9\u30bf\u30a4\u30eb\u306e\u30d1\u30b9\u30ef\u30fc\u30c9 \u30d5\u30a1\u30a4\u30eb (<span style=\"font-family: 'courier new', courier, monospace;\">\/etc\/passwd<\/span> \u3068 <span style=\"font-family: 'courier new', courier, monospace;\">\/etc\/shadow<\/span>) \u3092\u4f7f\u3063\u305f\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u30bf\u30b9\u30af\u3092\u51e6\u7406\u3057\u307e\u3059\u3002\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u3092 PAM \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u30d7\u30e9\u30b0\u30a4\u30f3\u3059\u308c\u3070\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c Unix \u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u306b\u57fa\u3065\u3044\u3066\u30e6\u30fc\u30b6\u30fc\u3092\u8a8d\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>PAM \u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u306f\u4e2d\u5fc3\u3068\u306a\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc (<span style=\"font-family: 'courier new', courier, monospace;\">libpam<\/span>) \u304c\u3042\u308a\u3001\u3053\u306e\u30bb\u30f3\u30c8\u30e9\u30eb \u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u304c\u3055\u307e\u3056\u307e\u306a PAM \u30e2\u30b8\u30e5\u30fc\u30eb\u3068\u901a\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002\u8a8d\u8a3c\u3084\u8a8d\u53ef\u3092\u5fc5\u8981\u3068\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001PAM API \u3092\u4f7f\u3063\u3066\u3053\u306e\u30bb\u30f3\u30c8\u30e9\u30eb \u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3068\u5bfe\u8a71\u3057\u3001\u305d\u308c\u3092\u53d7\u3051\u3066\u30bb\u30f3\u30c8\u30e9\u30eb \u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u304c\u305d\u308c\u3089\u306e\u30bf\u30b9\u30af\u3092\u9069\u5207\u306a\u30e2\u30b8\u30e5\u30fc\u30eb\u306b\u59d4\u4efb\u3057\u307e\u3059\u3002\u8981\u3059\u308b\u306b\u3001<span style=\"font-family: 'courier new', courier, monospace;\">libpam<\/span> \u306f PAM \u30e2\u30b8\u30e5\u30fc\u30eb (\u305f\u3068\u3048\u3070 <span style=\"font-family: 'courier new', courier, monospace;\">pam_unix.so<\/span>) \u306e\u30ed\u30fc\u30c9\u3068\u7ba1\u7406\u3092\u62c5\u3044\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3 \u2212 PAM \u30e2\u30b8\u30e5\u30fc\u30eb\u9593\u306e\u901a\u4fe1\u3092\u652f\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Linux \u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u3088\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3084\u30b5\u30fc\u30d3\u30b9\u306e\u591a\u304f\u304c PAM \u306b\u4f9d\u5b58\u3057\u3066\u304a\u308a\u3001\u8a8d\u8a3c\u306b PAM \u306e API \u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001<span style=\"font-family: 'courier new', courier, monospace;\">SSH<\/span> \u30b5\u30fc\u30d3\u30b9\u3084 GNOME \u30c7\u30a3\u30b9\u30d7\u30ec\u30a4 \u30de\u30cd\u30fc\u30b8\u30e3\u30fc (<span style=\"font-family: 'courier new', courier, monospace;\">GDM<\/span>)\u3001\u30b7\u30b9\u30c6\u30e0 \u30b5\u30fc\u30d3\u30b9\u306e <span style=\"font-family: 'courier new', courier, monospace;\">sudo<\/span> \u306a\u3069\u3082 PAM API \u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u56f3 1 \u306f\u3001PAM \u3092\u4f7f\u3063\u305f SSH \u306e\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_130849\" aria-describedby=\"caption-attachment-130849\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-130849 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2023\/10\/image1.png\" alt=\"\u753b\u50cf 1 \u306f\u3001PAM \u3092\u4f7f\u3063\u305f SSH \u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u306e\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u3059\u3002SSH \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c SSH \u30b5\u30fc\u30d0\u30fc\u306b\u63a5\u7d9a\u3057\u3001\u305d\u3053\u304b\u3089\u30e6\u30fc\u30b6\u30fc\u3092\u8a8d\u8a3c\u3059\u308b PAM \u30e2\u30b8\u30e5\u30fc\u30eb\u3078\u3068\u30d7\u30ed\u30bb\u30b9\u304c\u6d41\u308c\u3066\u3044\u304d\u307e\u3059\u3002 \" width=\"900\" height=\"725\" \/><figcaption id=\"caption-attachment-130849\" class=\"wp-caption-text\">\u56f3 1. SSH \u306e\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9<\/figcaption><\/figure>\n<p>\u653b\u6483\u8005\u306f\u3001PAM \u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u3068\u67d4\u8edf\u6027\u3092\u60aa\u7528\u3057\u3001\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u306e\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30c8\u3084\u64cd\u4f5c\u3092\u884c\u3063\u3066\u304d\u307e\u3057\u305f\u3002\u30de\u30eb\u30a6\u30a7\u30a2\u306f\u6a19\u7684\u30b7\u30b9\u30c6\u30e0\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4fb5\u5bb3\u306b PAM API \u3092\u4f7f\u3063\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<h2><a id=\"post-130877-_utd3rduhtc1\"><\/a>\u30de\u30eb\u30a6\u30a7\u30a2\u306b\u304a\u3051\u308b PAM API \u306e\u5229\u7528\u6cd5<\/h2>\n<p>\u4ee5\u4e0b\u3001\u30e6\u30fc\u30b6\u30fc \u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb\u306e\u30ed\u30b0\u306e\u53d6\u5f97\u3084\u30ea\u30e2\u30fc\u30c8 \u30a2\u30af\u30bb\u30b9\u306e\u78ba\u7acb\u306b PAM API \u3092\u4f7f\u3046\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u30fc\u306e\u4e00\u4f8b\u3092\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002<\/p>\n<h3><a id=\"post-130877-_v0mi4nxkc8yc\"><\/a>Orbit \u30de\u30eb\u30a6\u30a7\u30a2<\/h3>\n<p><a href=\"https:\/\/intezer.com\/blog\/incident-response\/orbit-new-undetected-linux-threat\/\" target=\"_blank\" rel=\"noopener\">Orbit \u30de\u30eb\u30a6\u30a7\u30a2<\/a>\u306f 2022 \u5e74\u306b\u767a\u898b\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u306f\u3055\u307e\u3056\u307e\u306a\u5171\u6709\u30aa\u30d6\u30b8\u30a7\u30af\u30c8 \u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306e API \u3092\u30d5\u30c3\u30af\u3057\u307e\u3059\u304c\u3001PAM API \u3082\u305d\u306e\u5bfe\u8c61\u306e 1 \u3064\u3067\u3059\u3002Orbit \u30de\u30eb\u30a6\u30a7\u30a2\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u306f\u3001<span style=\"font-family: 'courier new', courier, monospace;\">pam_open_session()<\/span> API\u3001<span style=\"font-family: 'courier new', courier, monospace;\">pam_authenticate()<\/span> API\u3001<span style=\"font-family: 'courier new', courier, monospace;\">pam_acct_mgmt()<\/span> API \u3092\u30d5\u30c3\u30af\u3057\u3066\u3001\u88ab\u5bb3\u8005\u306e SSH \u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace;\">pam_open_session()<\/span> API \u306f\u8a8d\u8a3c\u304c\u6210\u529f\u3057\u305f\u5834\u5408\u306b\u5bfe\u8c61\u306e\u30e6\u30fc\u30b6\u30fc\u7528\u306e\u65b0\u305f\u306a\u30bb\u30c3\u30b7\u30e7\u30f3\u3092\u958b\u59cb\u3057\u307e\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace;\">pam_authenticate()<\/span> API \u306f\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u51e6\u7406\u3057\u307e\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace;\">pam_acct_mgmt()<\/span> API \u306f\u30e6\u30fc\u30b6\u30fc \u30a2\u30ab\u30a6\u30f3\u30c8\u60c5\u5831\u3092\u7ba1\u7406\u3057\u3066\u3044\u3066\u3001\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u6709\u52b9\u671f\u9650\u306f\u5207\u308c\u3066\u3044\u306a\u3044\u304b\u3001\u305d\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u7279\u5b9a\u306e\u6642\u9593\u306b\u5bfe\u8c61\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u8a31\u53ef\u3055\u308c\u3066\u3044\u308b\u304b\u3001\u3068\u3044\u3063\u305f\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<h3><a id=\"post-130877-_ean6t8g0lntl\"><\/a>Azazel \u30eb\u30fc\u30c8\u30ad\u30c3\u30c8<\/h3>\n<p>Azazel \u30eb\u30fc\u30c8\u30ad\u30c3\u30c8\u306f\u3001\u53e4\u3044 Linux \u30ab\u30fc\u30cd\u30eb\u3092\u72d9\u3046\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30eb\u30fc\u30c8\u30ad\u30c3\u30c8\u3067\u3001<a href=\"https:\/\/man7.org\/linux\/man-pages\/man8\/ld.so.8.html\" target=\"_blank\" rel=\"noopener\"><span style=\"font-family: 'courier new', courier, monospace;\">LD_PRELOAD<\/span><\/a> \u6280\u8853\u3092\u30d9\u30fc\u30b9\u306b\u3057\u3066\u3044\u307e\u3059\u3002\u56f3 2 \u306f\u3001\u3053\u306e\u30eb\u30fc\u30c8\u30ad\u30c3\u30c8\u304c PAM API (<span style=\"font-family: 'courier new', courier, monospace;\">pam_open_session()<\/span>\u3001<span style=\"font-family: 'courier new', courier, monospace;\">pam_authenticate()<\/span>\u3001<span style=\"font-family: 'courier new', courier, monospace;\">pam_acct_mgmt()<\/span>) \u3092\u3069\u306e\u3088\u3046\u306b\u4f7f\u3063\u3066\u30ea\u30e2\u30fc\u30c8\u304b\u3089\u306e\u88ab\u5bb3\u30de\u30b7\u30f3\u4fb5\u5165\u3092\u5b9f\u73fe\u3057\u3066\u3044\u308b\u304b\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_130852\" aria-describedby=\"caption-attachment-130852\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-130852 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2023\/10\/image2.png\" alt=\"\u753b\u50cf 2 \u306f\u3001\u591a\u6570\u306e\u30b3\u30fc\u30c9\u884c\u304b\u3089\u306a\u308b\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u3067\u3059\u3002Azazel \u30eb\u30fc\u30c8\u30ad\u30c3\u30c8\u306f\u3001\u8d64\u3044\u56db\u89d2\u5f62\u3067\u5f37\u8abf\u8868\u793a\u3057\u305f pam_authenticate() \u3092\u4f7f\u3063\u3066\u30ea\u30e2\u30fc\u30c8\u304b\u3089\u306e\u4fb5\u5165\u3092\u5b9f\u73fe\u3057\u3066\u3044\u307e\u3059\u3002 \" width=\"900\" height=\"417\" \/><figcaption id=\"caption-attachment-130852\" class=\"wp-caption-text\">\u56f3 2. Azazel \u30eb\u30fc\u30c8\u30ad\u30c3\u30c8\u306b\u3088\u308b <span style=\"font-family: 'courier new', courier, monospace;\">pam_authenticate()<\/span> API \u306e\u5229\u7528<\/figcaption><\/figure>\n<h3><a id=\"post-130877-_2xutil4smg31\"><\/a>Derusbi \u30de\u30eb\u30a6\u30a7\u30a2<\/h3>\n<p><a href=\"https:\/\/paper.seebug.org\/papers\/APT\/APT_CyberCriminal_Campagin\/2015\/2015.12.15.Newcomers_in_the_Derusbi_family\/Newcomers-in-the-Derusbi-family.pdf\" target=\"_blank\" rel=\"noopener\">Derusbi<\/a> \u306f\u3001Linux \u3068 Windows \u30b7\u30b9\u30c6\u30e0\u306e\u4e21\u65b9\u3092\u72d9\u3046\u3053\u3068\u3067\u77e5\u3089\u308c\u308b\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u30fc\u3067\u3059\u3002\u8105\u5a01\u30a2\u30af\u30bf\u30fc\u306f\u4e3b\u306b\u3001\u6a19\u7684\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u30ea\u30e2\u30fc\u30c8 \u30a2\u30af\u30bb\u30b9\u306e\u53d6\u5f97\u30fb\u7dad\u6301\u306e\u305f\u3081\u306b Derusbi \u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30a2\u30af\u30bf\u30fc\u306f\u6a5f\u5fae\u60c5\u5831\u306e\u7a83\u53d6\u3084\u5075\u5bdf\u306e\u5b9f\u65bd\u306a\u3069\u306e\u60aa\u610f\u306e\u3042\u308b\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002Derusbi \u30de\u30eb\u30a6\u30a7\u30a2\u3082\u307e\u305f <span style=\"font-family: 'courier new', courier, monospace;\">LD_PRELOAD<\/span> \u6280\u8853\u3092\u63a1\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u60aa\u610f\u306e\u3042\u308b\u5171\u6709\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u3092\u30ed\u30fc\u30c9\u3057\u3001\u3053\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306b PAM API \u3092\u30a8\u30af\u30b9\u30dd\u30fc\u30c8\u3055\u305b\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3><a id=\"post-130877-_cqzjw83jeby2\"><\/a>Skidmap \u30de\u30eb\u30a6\u30a7\u30a2<\/h3>\n<p><a href=\"https:\/\/www.trendmicro.com\/en_us\/research\/19\/i\/skidmap-linux-malware-uses-rootkit-capabilities-to-hide-cryptocurrency-mining-payload.html\" target=\"_blank\" rel=\"noopener\">Skidmap \u30de\u30eb\u30a6\u30a7\u30a2<\/a> \u306f 2019 \u5e74\u306b\u521d\u3081\u3066\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u4e3b\u306b Linux \u30b7\u30b9\u30c6\u30e0\u3092\u30af\u30ea\u30d7\u30c8\u30de\u30a4\u30cb\u30f3\u30b0\u306e\u305f\u3081\u306b\u72d9\u3044\u307e\u3059\u3002\u88ab\u5bb3\u30de\u30b7\u30f3\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u3001Skidmap \u306f\u5bfe\u8c61\u30de\u30b7\u30f3\u4e0a\u306e\u6b63\u898f\u306e <span style=\"font-family: 'courier new', courier, monospace;\">pam_unix.so<\/span> \u3092\u60aa\u610f\u306e\u3042\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306b\u7f6e\u304d\u63db\u3048\u307e\u3059\u3002\u3053\u306e\u60aa\u610f\u306e\u3042\u308b <span style=\"font-family: 'courier new', courier, monospace;\">pam_unix.so<\/span> \u30d5\u30a1\u30a4\u30eb\u306f\u7279\u5b9a\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u6307\u5b9a\u3059\u308c\u3070\u3069\u3093\u306a\u30e6\u30fc\u30b6\u30fc\u3067\u3082\u53d7\u3051\u5165\u308c\u307e\u3059\u3002\u3053\u306e\u305f\u3081\u3001\u653b\u6483\u8005\u306f\u30de\u30b7\u30f3\u306b\u4efb\u610f\u306e\u30e6\u30fc\u30b6\u30fc\u3068\u3057\u3066\u30ed\u30b0\u30a4\u30f3\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-130877-_89t4wtsqrc6d\"><\/a>\u7d50\u8ad6<\/h2>\n<p>PAM \u306f Linux \u30b7\u30b9\u30c6\u30e0\u306b\u306f\u6b20\u304b\u305b\u306a\u3044\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3059\u3002Linux \u30b7\u30b9\u30c6\u30e0\u306f\u3053\u308c\u304c\u3042\u308b\u304a\u304b\u3052\u3067\u3001\u6a19\u6e96\u5316\u3055\u308c\u3001\u67d4\u8edf\u3067\u3001\u5b89\u5168\u306a\u30e2\u30b8\u30e5\u30fc\u30eb\u5f0f\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3067\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u3092\u884c\u3048\u3066\u3044\u307e\u3059\u3002\u5b89\u5168\u306a\u8a8d\u8a3c\u30b7\u30b9\u30c6\u30e0\u3092\u7dad\u6301\u3057\u3001\u6a5f\u5fae\u30c7\u30fc\u30bf\u3092\u4fdd\u8b77\u3059\u308b\u306b\u306f\u3001\u30b5\u30f3\u30c9\u30dc\u30c3\u30af\u30b9\u74b0\u5883\u3067 PAM API \u3092\u76e3\u8996\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n<p>\u5b89\u5168\u304b\u3064\u9694\u96e2\u3055\u308c\u305f\u74b0\u5883\u3067\u3001\u307b\u304b\u306e\u6f5c\u5728\u7684\u306b\u4e0d\u5be9\u306a\u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u3068\u3068\u3082\u306b PAM API \u3092\u76e3\u8996\u3059\u308b\u3053\u3068\u306f\u3001PAM API \u7d4c\u7531\u3067\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u3092\u6539\u3056\u3093\u3057\u3088\u3046\u3068\u3059\u308b\u60aa\u610f\u306e\u3042\u308b\u8a66\u307f\u3092\u691c\u51fa\u3059\u308b\u3046\u3048\u3067\u6709\u52b9\u3067\u3059\u3002<span style=\"font-family: 'courier new', courier, monospace;\">LD_PRELOAD<\/span> \u74b0\u5883\u5909\u6570\u306e\u4f7f\u308f\u308c\u304b\u305f\u3084\u3001\u95a2\u9023\u3059\u308b\u30a4\u30d9\u30f3\u30c8\u3092\u3088\u304f\u89b3\u5bdf\u3059\u308b\u3053\u3068\u3067\u3001\u653b\u6483\u8005\u304c PAM API \u3092\u4f7f\u3063\u3066\u8a8d\u8a3c\u30d7\u30ed\u30bb\u30b9\u306b\u5e72\u6e09\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e <a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/advanced-wildfire\" target=\"_blank\" rel=\"noopener\">Advanced WildFire for Linux<\/a> \u306f\u3001\u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306a\u3069\u306e\u6f5c\u5728\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8105\u5a01\u3092\u78ba\u5b9f\u306b\u7279\u5b9a\u3057\u3066\u8fc5\u901f\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306b\u3001PAM API \u306e\u4f7f\u7528\u72b6\u6cc1\u3092\u76e3\u8996\u3057\u3001\u30ed\u30b0\u306b\u8a18\u9332\u3057\u307e\u3059\u3002<\/p>\n<h2><a id=\"post-130877-_mphdedgnypod\"><\/a>Advanced WildFire \u306b\u3088\u308b PAM \u30a2\u30af\u30c6\u30a3\u30d3\u30c6\u30a3\u306e\u6355\u6349<\/h2>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306e <a href=\"https:\/\/www.paloaltonetworks.jp\/network-security\/advanced-wildfire\" target=\"_blank\" rel=\"noopener\">Advanced WildFire for Linux<\/a> \u306f\u3001\u30af\u30ec\u30c7\u30f3\u30b7\u30e3\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306a\u3069\u306e\u6f5c\u5728\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8105\u5a01\u3092\u78ba\u5b9f\u306b\u7279\u5b9a\u3057\u3066\u8fc5\u901f\u306b\u5bfe\u51e6\u3059\u308b\u305f\u3081\u306b\u3001PAM API \u306e\u4f7f\u7528\u72b6\u6cc1\u3092\u76e3\u8996\u3057\u3001\u30ed\u30b0\u306b\u8a18\u9332\u3057\u307e\u3059\u3002\u56f3 3 \u306e\u30b0\u30e9\u30d5\u306f\u3001WildFire \u304c\u691c\u51fa\u3057\u305f PAM API \u3092\u4f7f\u3046\u30de\u30eb\u30a6\u30a7\u30a2\u306e\u767a\u751f\u72b6\u6cc1 (6 \u304b\u6708\u9593) \u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<figure id=\"attachment_130854\" aria-describedby=\"caption-attachment-130854\" style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  class=\"wp-image-130854 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/2023\/10\/image3.png\" alt=\"\u753b\u50cf 3 \u306f\u30012023 \u5e74 5 \u6708\u304b\u3089 2023 \u5e74 10 \u6708\u307e\u3067\u306e 6 \u304b\u6708\u9593\u306b\u767a\u751f\u3057\u305f PAM API \u3092\u4f7f\u3046\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u8a18\u9332\u3057\u305f\u30b0\u30e9\u30d5\u3067\u3059\u3002 \" width=\"900\" height=\"170\" \/><figcaption id=\"caption-attachment-130854\" class=\"wp-caption-text\">\u56f3 3. PAM API \u3092\u4f7f\u3046\u30de\u30eb\u30a6\u30a7\u30a2 (6 \u304b\u6708\u9593\u306e\u7d71\u8a08)<\/figcaption><\/figure>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u306f\u3001\u30d5\u30a1\u30a4\u30eb \u30b5\u30f3\u30d7\u30eb\u3084 IoC (\u4fb5\u5bb3\u6307\u6a19) \u3092\u3075\u304f\u3080\u8abf\u67fb\u7d50\u679c\u3092 Cyber Threat Alliance (CTA: \u30b5\u30a4\u30d0\u30fc\u8105\u5a01\u30a2\u30e9\u30a4\u30a2\u30f3\u30b9) \u306e\u30e1\u30f3\u30d0\u30fc\u3068\u5171\u6709\u3057\u307e\u3057\u305f\u3002CTA \u306e\u30e1\u30f3\u30d0\u30fc\u306f\u3053\u306e\u30a4\u30f3\u30c6\u30ea\u30b8\u30a7\u30f3\u30b9\u3092\u4f7f\u3063\u3066\u3001\u304a\u5ba2\u69d8\u306b\u4fdd\u8b77\u3092\u8fc5\u901f\u306b\u63d0\u4f9b\u3057\u3001\u60aa\u610f\u306e\u3042\u308b\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u8005\u3092\u4f53\u7cfb\u7684\u306b\u963b\u5bb3\u3067\u304d\u307e\u3059\u3002\u8a73\u7d30\u306f <a href=\"https:\/\/www.cyberthreatalliance.org\/\" target=\"_blank\" rel=\"noopener\">Cyber Threat Alliance<\/a> \u306b\u3066\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\uff61<\/p>\n<h2><a id=\"post-130877-_bvgu4sfx9n9p\"><\/a>IoC (\u4fb5\u5bb3\u6307\u6a19)<\/h2>\n<h3>Azazel \u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u30fc<\/h3>\n<ul>\n<li>SHA256 \u30cf\u30c3\u30b7\u30e5: <span style=\"font-family: 'courier new', courier, monospace;\">2ad5993cf4db52ef72e299590d79dd7414bc3b119f5d8be8274ad89bec4cbbae<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 \u672c\u7a3f\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u304a\u3051\u308b PAM (Pluggable Authenticaton Modules) \u306e API (application programming interface) \u5229\u7528\u306b\u3064\u3044\u3066\u89e3<\/p>\n","protected":false},"author":323,"featured_media":134416,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[1974,4428],"tags":[4557,4553,4578],"product_categories":[4444],"coauthors":[3876],"class_list":["post-130877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-malware-ja","category-threat-research-ja","tag-api-ja","tag-linux-ja","tag-sandbox","product_categories-advanced-wildfire-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>\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u60c5\u5831\u306e\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30c8\u3084\u64cd\u4f5c\u3092\u72d9\u3046 Linux \u7528\u30de\u30eb\u30a6\u30a7\u30a2\u306e PAM API \u60aa\u7528<\/title>\n<meta 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