{"id":105352,"date":"2020-03-22T21:41:56","date_gmt":"2020-03-23T04:41:56","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=105352"},"modified":"2020-03-23T17:56:16","modified_gmt":"2020-03-24T00:56:16","slug":"new-mirai-variant-mukashi","status":"publish","type":"post","link":"https:\/\/origin-unit42.paloaltonetworks.com\/ja\/new-mirai-variant-mukashi\/","title":{"rendered":"Zyxel\u306eNAS\u306e\u8106\u5f31\u6027\uff08CVE-2020-9054\uff09\u3092\u6a19\u7684\u306b\u3057\u305f\u65b0\u3057\u3044Mirai\u4e9c\u7a2e\u3001Mukashi\u304c\u767a\u898b\u3055\u308c\u308b"},"content":{"rendered":"<h2><a id=\"post-105352-executive-summary\"><\/a>\u6982\u8981<\/h2>\n<p>\u5148\u6708\u3001Zyxel\u306e\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u30b9\u30c8\u30ec\u30fc\u30b8\uff08NAS\uff09\u30c7\u30d0\u30a4\u30b9\u306b\u304a\u3051\u308b\u8106\u5f31\u6027\uff08<a href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2020-9054\">CVE-2020-9054<\/a>\uff09\u306e\u6982\u5ff5\u5b9f\u8a3c\uff08PoC\uff09\u30b3\u30fc\u30c9\u304c\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u306e\u76f4\u5f8c\u304b\u3089Mirai\u306e\u65b0\u3057\u3044\u4e9c\u7a2e\u3067\u3042\u308bMukashi\u306f\u3001\u672c\u8106\u5f31\u6027\u3092\u60aa\u7528\u3057\u3066\u8106\u5f31\u306a\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u540c\u793eNAS\u30c7\u30d0\u30a4\u30b9\u3078\u306e\u611f\u67d3\u3092\u8a66\u307f\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Mukashi \u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u8cc7\u683c\u60c5\u5831\u3092\u3055\u307e\u3056\u307e\u306b\u7d44\u307f\u5408\u308f\u305b\u3066\u30ed\u30b0\u30a4\u30f3 \u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u653b\u6483\u3092\u884c\u3044\u3001\u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u304c\u6210\u529f\u3059\u308b\u3068\u30b3\u30de\u30f3\u30c9&amp;\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\uff08C2\uff09\u30b5\u30fc\u30d0\u30fc\u306b\u901a\u77e5\u3057\u307e\u3059\u3002\u30d0\u30fc\u30b8\u30e7\u30f35.21\u307e\u3067\u306e\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3092\u5b9f\u884c\u3057\u3066\u3044\u308b\u8907\u6570\u306eZyxel NAS\u88fd\u54c1\u304c\u3053\u306e\u4e8b\u524d\u8a8d\u8a3c\u30b3\u30de\u30f3\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u8106\u5f31\u6027\u306b\u5bfe\u3057\u3066\u8106\u5f31\u3067\u3059\u3002<a href=\"https:\/\/www.zyxel.com\/support\/remote-code-execution-vulnerability-of-NAS-products.shtml\">Zyxel\u306e\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u306f\u3053\u3061\u3089\u3067\u3059\u3002<\/a><\/p>\n<p>\u624b\u5143\u306eZyxel NAS\u30c7\u30d0\u30a4\u30b9\u306e\u8106\u5f31\u6027\u306f\u3001<a href=\"https:\/\/kb.cert.org\/artifacts\/cve-2020-9054.html\">\u3053\u3061\u3089\u306e\u30b5\u30a4\u30c8<\/a>\u3067\u30c6\u30b9\u30c8\u3057\u3066\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u672c\u8106\u5f31\u6027\u306f\u60aa\u7528\u304c\u304d\u308f\u3081\u3066\u5bb9\u6613\uff08trivial\uff09\u306a\u305f\u3081\u3001CVSSv3.1\u306b\u304a\u3051\u308b\u30b9\u30b3\u30a2\u306f\u300c\u7dca\u6025\u300d\uff089.8\uff09\u304c\u4ed8\u4e0e\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u8105\u5a01\u653b\u6483\u8005\u305f\u3061\u304c\u5f53\u8a72\u8106\u5f31\u6027\u3092\u5175\u5668\u5316\u3057\u3001\u30e2\u30ce\u306e\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\uff08IoT\uff09\u5206\u91ce\u3067\u306e\u6df1\u523b\u306a\u4e8b\u614b\u3092\u5f15\u304d\u8d77\u3053\u3057\u3066\u3082\u306a\u3093\u3089\u4e0d\u601d\u8b70\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u672c\u8106\u5f31\u6027\u304c<a href=\"https:\/\/krebsonsecurity.com\/2020\/02\/zyxel-fixes-0day-in-network-storage-devices\/\">\u767a\u898b\u3055\u308c\u305f<\/a>\u304d\u3063\u304b\u3051\u306f\u3053\u308c\u304c\u30bc\u30ed\u30c7\u30a4 \u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8 \u30b3\u30fc\u30c9\u3068\u3057\u3066\u8ca9\u58f2\u3055\u308c\u3066\u3044\u305f\u3053\u3068\u3067\u3001\u305d\u306e\u6642\u70b9\u3067\u306f\u307e\u3060\u30d9\u30f3\u30c0\u3078\u306e\u5831\u544a\u304c\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u6700\u521d\u306b\u767a\u898b\u3055\u308c\u305f\u3055\u3044\u306e\u30d6\u30ed\u30b0\u3067\u3082<em>\u300c\u5f53\u8a72\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306f\u3044\u307eEmotet\u306b\u3053\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u306b\u7d44\u307f\u5165\u308c\u3088\u3046\u3068\u3059\u308b\u653b\u6483\u8005\u305f\u3061\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u300d<\/em>\u3068\u8ff0\u3079\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u672c\u7a3f\u3067\u306f\u753b\u50cf\u3084IoC\u3092\u63d0\u793a\u3057\u3064\u3064\u3001\u30ad\u30eb\u30c1\u30a7\u30fc\u30f3\u5168\u4f53\u306e\u6982\u8981\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h3><a id=\"post-105352-vulnerability-analysis\"><\/a>\u8106\u5f31\u6027\u306e\u5206\u6790<\/h3>\n<p>\u672c\u4ef6\u306e\u8106\u5f31\u6027\u306f\u3001CGI\u5b9f\u884c\u53ef\u80fd\u30d5\u30a1\u30a4\u30ebweblogin.cgi\u304c\u3001\u8a8d\u8a3c\u51e6\u7406\u3067\u30e6\u30fc\u30b6\u30fc\u540d\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u9069\u5207\u306b\u30b5\u30cb\u30bf\u30a4\u30ba\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u306b\u3042\u308a\u307e\u3059\u3002\u653b\u6483\u8005\u306f\u300c'\u300d\uff08\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8\uff09\u3092\u4f7f\u3063\u3066\u6587\u5b57\u5217\u3092\u9589\u3058\u3001\u305d\u306e\u5f8c\u306b\u300c;\u300d\uff08\u30bb\u30df\u30b3\u30ed\u30f3\uff09\u3092\u3064\u3065\u3051\u3066\u4efb\u610f\u306e\u30b3\u30de\u30f3\u30c9\u3092\u3064\u306a\u3052\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u30b3\u30de\u30f3\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002weblogin.cgi\u306fHTTP GET\u30ea\u30af\u30a8\u30b9\u30c8\u3068POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u4e21\u65b9\u3092\u53d7\u3051\u5165\u308c\u308b\u305f\u3081\u3001\u653b\u6483\u8005\u306f\u3044\u305a\u308c\u304b\u306eHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u60aa\u610f\u306e\u3042\u308b\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u57cb\u3081\u8fbc\u3080\u3053\u3068\u3067\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3><a id=\"post-105352-exploit-in-the-wild\"><\/a>\u5b9f\u969b\u306b\u884c\u308f\u308c\u3066\u3044\u308b\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8<\/h3>\n<p>\u79c1\u305f\u3061\u304c\u78ba\u8a8d\u3057\u305f\u6700\u521d\u306e\u30a4\u30f3\u30b7\u30c7\u30f3\u30c8\u306f2020\u5e743\u670812\u65e519\u664207\u5206\uff08UTC\u6642\u9593\u3002\u65e5\u672c\u6642\u9593\u3067\u306f2020\u5e7403\u670813\u65e504\u664207\u5206\uff09\u306b\u767a\u751f\u3057\u3001\u5f0a\u793e\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u3088\u3063\u3066\u691c\u51fa\u3055\u308c\u307e\u3057\u305f\u3002\u4ee5\u4e0b\u306e\u56f31\u3001\u56f32\u306b\u793a\u3059\u3088\u3046\u306b\u3001\u3053\u306e\u3068\u304d\u306e\u8105\u5a01\u653b\u6483\u8005\u306f zi \u3068\u3044\u3046\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8\u3092tmp\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u305f\u5f53\u8a72\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u5b9f\u884c\u5f8c\u3001\u8106\u5f31\u6027\u306e\u3042\u308b\u30c7\u30d0\u30a4\u30b9\u4e0a\u306e\u8a3c\u62e0\u3092\u524a\u9664\u3057\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p><em><span style=\"font-size: 10pt;\"><img width=\"1894\" height=\"194\"  class=\"wp-image-105355 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-1-exploit-request-spotted-in-the-wild.png\" alt=\"Figure 1. Exploit request spotted in the wild\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f31 \u5b9f\u969b\u306e\u60aa\u7528\u304c\u78ba\u8a8d\u3055\u308c\u305f\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u7528HTTP\u30ea\u30af\u30a8\u30b9\u30c8<\/span><\/em><\/p>\n<p>\u3053\u306ezi\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001\u3055\u307e\u3056\u307e\u306a\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u7528\u306eMirai\u30dc\u30c3\u30c8\u304c\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u3001\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3055\u308c\u305f\u30d0\u30a4\u30ca\u30ea\u304c\u5b9f\u884c\u5f8c\u306b\u524a\u9664\u3055\u308c\u307e\u3059\u3002\u5f0a\u793e\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u3088\u308b\u691c\u51fa\u6642\u70b9\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30d0\u30a4\u30ca\u30ea\u306f\u3044\u305a\u308c\u3082VirusTotal\u3067\u60c5\u5831\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u305f\u3060\u3057\u672c\u7a3f\u57f7\u7b46\u6642\u70b9\u3067\u306f8\u7a2e\u4e2d4\u7a2e\u306e\u60c5\u5831\u304cVirusTotal\u3067\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><em><span style=\"font-size: 10pt;\"><img width=\"1240\" height=\"558\"  class=\"wp-image-105357 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-2-shell-script-that-downloads-and-launches.png\" alt=\"Figure 2. Shell script that downloads and launches the bots\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f32 \u30dc\u30c3\u30c8\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3001\u8d77\u52d5\u3059\u308b\u30b7\u30a7\u30eb\u30b9\u30af\u30ea\u30d7\u30c8<\/span><\/em><\/p>\n<h3><a id=\"post-105352-new-mirai-variant-mukashi\"><\/a>Mirai\u306e\u65b0\u4e9c\u7a2eMukashi<\/h3>\n<p>Mukashi\u306f\u3001\u30e9\u30f3\u30c0\u30e0\u306a\u30db\u30b9\u30c8\u306e23\/tcp\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3001\u3055\u307e\u3056\u307e\u306a\u7d44\u307f\u5408\u308f\u305b\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u8a8d\u8a3c\u60c5\u5831\u3067\u30ed\u30b0\u30a4\u30f3 \u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u653b\u6483\u3092\u884c\u3044\u3001\u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u306b\u6210\u529f\u3059\u308b\u3068C2\u30b5\u30fc\u30d0\u30fc\u306b\u5831\u544a\u3059\u308b\u30dc\u30c3\u30c8\u3067\u3059\u3002\u307b\u304b\u306eMirai\u4e9c\u7a2e\u540c\u69d8\u3001Mukashi\u306fC2\u30b3\u30de\u30f3\u30c9\u3092\u53d7\u3051\u53d6\u3063\u3066DDoS\u653b\u6483\u3092\u4ed5\u639b\u3051\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5b9f\u884c\u3055\u308c\u308b\u3068\u3001Mukashi\u306f\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u300cProtecting your device from further infections.\uff08\u30c7\u30d0\u30a4\u30b9\u3092\u3055\u3089\u306a\u308b\u611f\u67d3\u304b\u3089\u4fdd\u8b77\u3057\u307e\u3059\uff09\u300d\u3068\u3044\u3046\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u529b\u3057\u3001\u81ea\u8eab\u306e\u30d7\u30ed\u30bb\u30b9\u540d\u3092dvrhelper\u306b\u5909\u66f4\u3057\u307e\u3059\u3002\u3053\u306e\u3053\u3068\u304b\u3089\u3001Mukashi\u306f\u81ea\u8eab\u306e\u7956\u5148\u3068\u306a\u308b\u4e9c\u7a2e\u304b\u3089\u7279\u5b9a\u306e\u6a5f\u80fd\u3092\u7d99\u627f\u3057\u3066\u3044\u305f\u3088\u3046\u3059\u304c\u3046\u304b\u304c\u3048\u307e\u3059\u3002<\/p>\n<p>Mukashi\u306f\u610f\u56f3\u3057\u305f\u30aa\u30da\u30ec\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u59cb\u524d\u306b23448\/tcp\u306b\u30d0\u30a4\u30f3\u30c9\u3057\u3001\u611f\u67d3\u30b7\u30b9\u30c6\u30e0\u4e0a\u30671\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3057\u304b\u5b9f\u884c\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u307b\u304b\u3001\u521d\u671f\u5316\u51e6\u7406\u4e2d\u306b\u3044\u304f\u3064\u304b\u306e\u6587\u5b57\u5217\u3092\u30c7\u30b3\u30fc\u30c9\u3057\u307e\u3059\u3002\u6b21\u306e\u8868\u306b\u793a\u3059\u3088\u3046\u306b\u3001\u3053\u3046\u3057\u3066\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u308b\u6587\u5b57\u5217\u306b\u306f\u8cc7\u683c\u60c5\u5831\u3084C2\u30b3\u30de\u30f3\u30c9\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u5f93\u6765\u306eXOR\u6697\u53f7\u3092\u4f7f\u7528\u3059\u308b\u7956\u5148\u3068\u306f\u7570\u306a\u308a\u3001Mukashi\u306f\u3053\u308c\u3089\u306e\u30b3\u30de\u30f3\u30c9\u3084\u8cc7\u683c\u60c5\u5831\u306e\u6697\u53f7\u5316\u306b\u30ab\u30b9\u30bf\u30e0\u5fa9\u53f7\u30eb\u30fc\u30c1\u30f3\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002\u5fa9\u53f7\u30b9\u30af\u30ea\u30d7\u30c8\u306f\u4ed8\u9332\u306b\u8a18\u8f09\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td>\/cmdline<\/td>\n<td>.udprand<\/td>\n<td>.udpbypass<\/td>\n<td>.udphex<\/td>\n<td>user<\/td>\n<td>tsgoingon<\/td>\n<\/tr>\n<tr>\n<td>\/proc\/<\/td>\n<td>.udpplain<\/td>\n<td>.tcpbypass<\/td>\n<td>default<\/td>\n<td>daemon<\/td>\n<td>zlxx.<\/td>\n<\/tr>\n<tr>\n<td>\/status<\/td>\n<td>.http<\/td>\n<td>.tcp<\/td>\n<td>admin<\/td>\n<td>juantech<\/td>\n<td>Zte521<\/td>\n<\/tr>\n<tr>\n<td>\/maps<\/td>\n<td>\/exe<\/td>\n<td>killallbots<\/td>\n<td>root<\/td>\n<td>123456<\/td>\n<td>hunt5759<\/td>\n<\/tr>\n<tr>\n<td>\/proc\/self\/cmdline<\/td>\n<td>None<\/td>\n<td>.\/<\/td>\n<td>guest<\/td>\n<td>solokey<\/td>\n<td>samsung<\/td>\n<\/tr>\n<tr>\n<td>self<\/td>\n<td>POST<\/td>\n<td>killer<\/td>\n<td>dvr2580222<\/td>\n<td>xc3511<\/td>\n<td>vizxv<\/td>\n<\/tr>\n<tr>\n<td>ping<\/td>\n<td>GET<\/td>\n<td>scanner<\/td>\n<td>support<\/td>\n<td>12345<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>.udp<\/td>\n<td>\/<\/td>\n<td>world<\/td>\n<td>guest<\/td>\n<td>xmhdipc<\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: 10pt;\"><em>\u88681 \u30c7\u30b3\u30fc\u30c9\u3055\u308c\u305f\u8cc7\u683c\u60c5\u5831\u3068\u30b3\u30de\u30f3\u30c9<\/em><\/span><\/p>\n<p>Mukashi\u306f\u3001\u8cc7\u683c\u60c5\u5831\u306e\u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u653b\u6483\u5b9f\u884c\u6642\u3001\u30b9\u30ad\u30e3\u30f3\u306e\u524d\u6bb5\u968e\u3067\u30c7\u30b3\u30fc\u30c9\u3057\u3066\u304a\u3044\u305f\u8cc7\u683c\u60c5\u5831\u306e\u307b\u304b\u306b\u3001\u3088\u304f\u77e5\u3089\u308c\u3066\u3044\u308b\u30c7\u30d5\u30a9\u30eb\u30c8 \u30d1\u30b9\u30ef\u30fc\u30c9\u3082\u4f7f\u7528\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070 t0talc0ntr0l4! \u3084 taZz@23495859 \u306a\u3069\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u56f33\u306f\u3001Mukashi\u304c\u30e9\u30f3\u30c0\u30e0\u306a\u30db\u30b9\u30c8\u3092\u30b9\u30ad\u30e3\u30f3\u4e2d\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u305f\u958b\u59cb\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u3067\u3059\u3002\u56f34\u306f\u3001Mukashi\u304c\u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u653b\u6483\u306b\u3088\u308a\u8a8d\u8a3c\u3092\u8a66\u307f\u3066\u3044\u308b\u69d8\u5b50\u3067\u3059\u3002<\/p>\n<p><em><span style=\"font-size: 10pt;\"><img width=\"1412\" height=\"442\"  class=\"wp-image-105359 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-3-scanning-tcp-port-23-of-random-hosts.png\" alt=\"Figure 3. Scanning TCP port 23 of random hosts\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f33 \u30e9\u30f3\u30c0\u30e0\u306a\u30db\u30b9\u30c8\u306e23\/tcp\u3092\u30b9\u30ad\u30e3\u30f3\u3057\u3066\u3044\u308b\u3068\u3053\u308d<\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\"><img width=\"846\" height=\"816\"  class=\"wp-image-105361 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-4-brute-forcing.png\" alt=\"Figure 4. Brute forcing\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f34 \u30d6\u30eb\u30fc\u30c8\u30d5\u30a9\u30fc\u30b9\u653b\u6483<\/span><\/em><\/p>\n<p>\u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u304c\u6210\u529f\u3059\u308b\u3068\u3001Mukashi\u306f\u8cc7\u683c\u60c5\u5831\u306e\u6709\u52b9\u306a\u7d44\u307f\u5408\u308f\u305b\u3092C2\u30b5\u30fc\u30d0\u30fc45[.]84[.]196[.]75\u306b\u5bfe\u3057\u300134834\/tcp\u7d4c\u7531\u3067\u5831\u544a\u3057\u307e\u3059\u3002<\/p>\n<p>\u5831\u544a\u6642\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306f&lt;\u30db\u30b9\u30c8\u306eIP\u30a2\u30c9\u30ec\u30b9&gt;:23 &lt;\u30e6\u30fc\u30b6\u30fc\u540d&gt;:&lt;\u30d1\u30b9\u30ef\u30fc\u30c9&gt;\u3068\u3044\u3046\u5f62\u5f0f\u3067\u3059\u3002\u6b21\u306e\u56f3\u306f\u3053\u306e\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002<\/p>\n<p><em><span style=\"font-size: 10pt;\"><img width=\"526\" height=\"44\"  class=\"wp-image-105363 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-5-reporting-successful-login-attempt.png\" alt=\"Figure 5. Reporting successful login attempt\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f35 \u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u306e\u6210\u529f\u3092\u5831\u544a\u3059\u308b\u30e1\u30c3\u30bb\u30fc\u30b8<\/span><\/em><\/p>\n<p>\u8d77\u52d5\u30fb\u521d\u671f\u5316\u304c\u3059\u3080\u3068\u3001Mukashi\u306f\u30d3\u30fc\u30b3\u30f3\u30924864\/tcp\u3067\u30ea\u30c3\u30b9\u30f3\u3057\u3066\u3044\u308bC2\u30b5\u30fc\u30d0\u30fc45[.]84[.]196[.]75\u306b\u9001\u308a\u8fd4\u3057\u3001\u30b3\u30de\u30f3\u30c9\u53d7\u3051\u5165\u308c\u6e96\u5099\u304c\u6574\u3063\u305f\u3053\u3068\u3092\u901a\u77e5\u3057\u307e\u3059\u3002\u30d3\u30fc\u30b3\u30f3\u306e\u4f8b\u3092\u4ee5\u4e0b\u306e\u56f36\u306b\u793a\u3057\u307e\u3059\u3002\u3053\u306e\u30d3\u30fc\u30b3\u30f3\u306f <em>&lt;\u540d\u524d&gt;.&lt;\u5165\u529b\u5f15\u6570&gt; <\/em>\u3068\u3044\u3046\u5f62\u5f0f\u3067\u3059\u3002\u3053\u306e <em>&lt;\u540d\u524d&gt;<\/em> \u306e\u90e8\u5206\u6587\u5b57\u5217\u306f\u3001\u30bd\u30b1\u30c3\u30c8\u751f\u6210\u6642\u306e\u623b\u308a\u5024\u306b\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u30bd\u30b1\u30c3\u30c8\u304c\u3046\u307e\u304f\u751f\u6210\u3055\u308c\u308c\u3070\u3053\u306e <em>&lt;\u540d\u524d&gt;<\/em> \u306f<em>root<\/em>\u306b\u306a\u308a\u3001\u305d\u3046\u3067\u306a\u3051\u308c\u3070<em>default<\/em>\u306b\u306a\u308a\u307e\u3059\u3002<em> &lt;\u5165\u529b\u5f15\u6570&gt;<\/em> \u306e\u90e8\u5206\u6587\u5b57\u5217\u306f\u3001\u5b9f\u884c\u6642\u306b\u30d0\u30a4\u30ca\u30ea\u306b\u6e21\u3055\u308c\u308b\u5165\u529b\u5f15\u6570\u3067\u3059\u3002\u5165\u529b\u5f15\u6570\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u30d3\u30fc\u30b3\u30f3\u306e\u6587\u5b57\u5217\u306f<em>None<\/em>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><em><span style=\"font-size: 10pt;\"><img width=\"260\" height=\"15\"  class=\"wp-image-105365 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-6-c2-beacon-from-the-x86-bot.png\" alt=\"Figure 6. C2 beacon from the x86 bot\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f36 x86\u30dc\u30c3\u30c8\u304b\u3089\u306eC2\u30d3\u30fc\u30b3\u30f3<\/span><\/em><\/p>\n<p>Mirai\u3068\u305d\u306e\u4e9c\u7a2e\u306eDDoS\u653b\u6483\u306e\u4ed5\u7d44\u307f\uff08UDP\u3001TCP\u3001UDP\u30d0\u30a4\u30d1\u30b9\u3001TCP\u30d0\u30a4\u30d1\u30b9\u306a\u3069\uff09\u306b\u3064\u3044\u3066\u306f\u65e2\u306b<a href=\"https:\/\/www.akamai.com\/us\/en\/multimedia\/documents\/state-of-the-internet\/akamai-mirai-botnet-threat-advisory.pdf\">\u8a73\u7d30\u306b<\/a>\u5206\u6790\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001Mukashi\u306eDDoS\u6a5f\u80fd\u306b\u3053\u308c\u3089\u306e\u4e9c\u7a2e\u3068\u306e\u9055\u3044\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u306a\u304a\u3001Mukashi\u306b\u3082\u30a2\u30f3\u30c1DDoS\u30c7\u30a3\u30d5\u30a7\u30f3\u30b9\u6a5f\u80fd\u304c\u5099\u308f\u3063\u3066\u304a\u308a\u3001\u3053\u308c\u306f\u300cMukashi\u306fdvrhelper\u306e\u4e9c\u7a2e\u306e\u7279\u5b9a\u6a5f\u80fd\u3092\u7d99\u627f\u3057\u3066\u3044\u308b\u300d\u3068\u3044\u3046\u4ee5\u524d\u304b\u3089\u306e\u63a8\u6e2c\u3092\u88cf\u4ed8\u3051\u308b\u3082\u306e\u3068\u306a\u308a\u307e\u3059\u3002\u6b21\u306e\u8868\u306b\u3001Mukashi\u304c\u30b5\u30dd\u30fc\u30c8\u3059\u308bC2\u30b3\u30de\u30f3\u30c9\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td>PING<\/td>\n<td>scanner<\/td>\n<td>.udpplain<\/td>\n<td>.tcp<\/td>\n<\/tr>\n<tr>\n<td>killallbots<\/td>\n<td>.udp<\/td>\n<td>.udpbypass<\/td>\n<td>.tcpbypass<\/td>\n<\/tr>\n<tr>\n<td>killer<\/td>\n<td>.udprand<\/td>\n<td>.udphex<\/td>\n<td>.http<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: 10pt;\"><em>\u88682 C2\u30b3\u30de\u30f3\u30c9<\/em><\/span><\/p>\n<p>Mukashi\u304cC2\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u53d7\u4fe1\u3057\u305fC2\u30b3\u30de\u30f3\u30c9\u6587\u5b57\u5217\u306e\u51e6\u7406\u3092\u62c5\u5f53\u3059\u308b\u306e\u306fattack_parsing() \u95a2\u6570\u3067\u3059\u3002C2\u30b3\u30de\u30f3\u30c9\u6587\u5b57\u5217\u306b\u306f\u3001\u30b3\u30de\u30f3\u30c9\u306e\u7a2e\u985e\u3084\u6a19\u7684\u306e\u30a2\u30c9\u30ec\u30b9\u306b\u52a0\u3048\u3001SYN\u30d5\u30e9\u30b0\u3001ACK\u30d5\u30e9\u30b0\u3001URG\u30d5\u30e9\u30b0\u3001PSH\u30d5\u30e9\u30b0\u3001RST\u30d5\u30e9\u30b0\u3001TTL\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u5b9b\u5148\u30dd\u30fc\u30c8\u756a\u53f7\u3001\u30d1\u30b1\u30c3\u30c8\u9577\u306a\u3069\u3001Mukashi\u304c\u30d1\u30b1\u30c3\u30c8\u30d8\u30c3\u30c0\u3092\u69cb\u7bc9\u3059\u308b\u3055\u3044\u306b\u5fc5\u8981\u3068\u3055\u308c\u308b\u95a2\u9023\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u3055\u3044\u5b9b\u5148\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u30e9\u30f3\u30c0\u30e0\u306a\u30dd\u30fc\u30c8\u756a\u53f7\u304c\u9078\u629e\u3055\u308c\u3001\u30d1\u30b1\u30c3\u30c8\u9577\u304c\u6307\u5b9a\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30dd\u30fc\u30c8\u756a\u53f7\u3068\u3057\u30661458\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>Mukashi\u306e\u30d0\u30a4\u30ca\u30ea\u306f\u3055\u307e\u3056\u307e\u306a\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u5411\u3051\u306b\u591a\u6570\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u3044\u305a\u308c\u3082\u6a5f\u80fd\u7684\u306b\u306f\u307b\u307c\u540c\u3058\u3067\u3059\u3002\u305f\u3060\u3057x86\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u306f\u3001\u30d7\u30ed\u30bb\u30b9 \u30b3\u30de\u30f3\u30c9 \u30e9\u30a4\u30f3\u3001\u7279\u5b9a\u6587\u5b57\u5217\u3001\u30d1\u30fc\u30df\u30c3\u30b7\u30e7\u30f3\u306b\u3088\u308a\u30d7\u30ed\u30bb\u30b9\u3092kill\u3059\u308bcleaner()\u95a2\u6570\u306f\u542b\u307e\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u6b21\u306e\u56f3\u306f\u3001x86\u30d0\u30fc\u30b8\u30e7\u30f3\u3068arm7\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u9055\u3044\u3092\u793a\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p><em><span style=\"font-size: 10pt;\"><img width=\"428\" height=\"374\"  class=\"wp-image-105367 aligncenter lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-7-main-routine-arm7.png\" alt=\"Figure 7. main routine (arm7)\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f37 \u30e1\u30a4\u30f3\u30eb\u30fc\u30c1\u30f3\uff08arm7\uff09<\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\"><img width=\"536\" height=\"280\"  class=\"wp-image-105369 lozad\"  data-src=\"https:\/\/unit42.paloaltonetworks.com\/wp-content\/uploads\/\/2020\/03\/figure-8-main-routine-x86.png\" alt=\"Figure 8. main routine (x86)\" \/><\/span><\/em><\/p>\n<p style=\"text-align: center;\"><em><span style=\"font-size: 10pt;\">\u56f38 \u30e1\u30a4\u30f3\u30eb\u30fc\u30c1\u30f3\uff08x86\uff09<\/span><\/em><\/p>\n<h2><a id=\"post-105352-conclusion-and-mitigation\"><\/a>\u7d50\u8ad6 \/ \u7de9\u548c\u7b56<\/h2>\n<p>\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u3092\u66f4\u65b0\u3057\u3001\u653b\u6483\u8005\u3092\u5bc4\u305b\u4ed8\u3051\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3092\u5f37\u304f\u304a\u52e7\u3081\u3057\u307e\u3059\u3002<a href=\"https:\/\/www.zyxel.com\/support\/remote-code-execution-vulnerability-of-NAS-products.shtml\">\u30d5\u30a1\u30fc\u30e0\u30a6\u30a7\u30a2\u306e\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u306f\u3053\u3061\u3089\u304b\u3089\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u53ef\u80fd\u3067\u3059\u3002<\/a>\u8907\u96d1\u306a\u30ed\u30b0\u30a4\u30f3\u30d1\u30b9\u30ef\u30fc\u30c9\u3067\u7dcf\u5f53\u305f\u308a\u653b\u6483\u3092\u9632\u6b62\u3059\u308b\u3053\u3068\u3082\u63a8\u5968\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u30d1\u30ed\u30a2\u30eb\u30c8\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30b9\u88fd\u54c1\u3092\u3054\u5229\u7528\u4e2d\u306e\u304a\u5ba2\u69d8\u306f\u3001\u6b21\u306e\u88fd\u54c1\u3068\u30b5\u30fc\u30d3\u30b9\u306b\u3088\u3063\u3066\u5f53\u8a72\u8106\u5f31\u6027\u304b\u3089\u4fdd\u8b77\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u3068\u3001Threat Prevention\u30e9\u30a4\u30bb\u30f3\u30b9\u3092\u6709\u52b9\u306b\u3057\u305f\u6b21\u4e16\u4ee3\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306e\u8105\u5a01\u9632\u6b62\u30b7\u30b0\u30cd\u30c1\u30e3 57806\u306b\u3088\u308a\u3001\u653b\u6483\u306f\u30d6\u30ed\u30c3\u30af\u3055\u308c\u307e\u3059\u3002<\/li>\n<li>WildFire\u3067\u306f\u3001\u9759\u7684\u30b7\u30b0\u30cd\u30c1\u30e3\u306b\u3088\u308b\u691c\u51fa\u3067\u540c\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u963b\u6b62\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2><a id=\"post-105352-iocs\"><\/a>IoC<\/h2>\n<h3><a id=\"post-105352-file-sha256\"><\/a>\u30d5\u30a1\u30a4\u30eb\uff08Sha256\u5024\uff09<\/h3>\n<ul>\n<li>8c0c4d8d727bff5e03f6b2aae125d3e3607948d9dff578b18be0add2fff3411c (arm.bot)<\/li>\n<li>5f918c2b5316c52cbb564269b116ce63935691ee6debe06ce1693ad29dbb5740 (arm5.bot)<\/li>\n<li>8fa54788885679e4677296fca4fe4e949ca85783a057750c658543645fb8682f (arm6.bot)<\/li>\n<li>90392af3fdc7af968cc6d054fc1a99c5156de5b1834d6432076c40d548283c22 (arm7.bot)<\/li>\n<li>675f4af00520905e31ff96ecef2d4dc77166481f584da89a39a798ea18ae2144 (mips.bot)<\/li>\n<li>46228151b547c905de9772211ce559592498e0c8894379f14adb1ef6c44f8933 (mpsl.bot)<\/li>\n<li>753914aa3549e52af2627992731ca18e702f652391c161483f532173daeb0bbd (sh4.bot)<\/li>\n<li>ce793ddec5410c5104d0ea23809a40dd222473e3d984a1e531e735aebf46c9dc (x86.bot)<\/li>\n<li>a059e47b4c76b6bbd70ca4db6b454fd9aa19e5a0487c8032fe54fa707b0f926d (zi)<\/li>\n<\/ul>\n<h3><a id=\"post-105352-network\"><\/a>\u30cd\u30c3\u30c8\u30ef\u30fc\u30af<\/h3>\n<ul>\n<li>45[.]84[.]196[.]75:34834 (\u30ed\u30b0\u30a4\u30f3\u8a66\u884c\u304c\u6210\u529f\u3057\u305f\u5834\u5408\u306e\u5831\u544a\u5148)<\/li>\n<li>45[.]84[.]196[.]75:4864 (C2)<\/li>\n<li>0[.]0[.]0[.]0:23448 (\u5358\u4e00\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9)<\/li>\n<\/ul>\n<h3><a id=\"post-105352-previous-activity\"><\/a>\u4ee5\u524d\u306e\u6d3b\u52d5<\/h3>\n<p>\u4ee5\u4e0b\u306e\u8868\u306f\u3001\u540c\u4e00IP\u30a2\u30c9\u30ec\u30b9\u4e0a\u306b\u30db\u30b9\u30c6\u30a3\u30f3\u30b0\u3055\u308c\u3066\u3044\u308b\u540c\u4e9c\u7a2e\u30b5\u30f3\u30d7\u30eb\u306e\u30cf\u30c3\u30b7\u30e5\u5024\u3067\u3059\u3002\u305f\u3060\u3057\u3001CVE-2020-9054\u306e\u30a8\u30af\u30b9\u30d7\u30ed\u30a4\u30c8\u3067\u3053\u308c\u3089\u304c\u914d\u5e03\u3055\u308c\u305f\u3068\u3044\u3046\u8a3c\u62e0\u306f\u78ba\u8a8d\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002<\/p>\n<table>\n<tbody>\n<tr>\n<td><strong>\u521d\u51fa<\/strong><\/td>\n<td><strong>URL<\/strong><\/td>\n<td><strong>SHA256\u5024<\/strong><\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/arc.corona<\/td>\n<td>3e8af889a10a7c8efe6a0951a78f3dbadae1f0aa28140552efa0477914afd4fd<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/arm5.corona<\/td>\n<td>213cdcf6fd5ca833d03d6f5fa0ec5c7e5af25be8c140b3f2166dccccf1232c3e<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/m68k.corona<\/td>\n<td>4f1fe9dc48661efe2c21b42bd5779f89db402b5caa614939867508fa6ba22cd6<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/arm6.corona<\/td>\n<td>0f7fb7fb27ce859b8780502c12d16611b3a7ae72086142a4ea22d5e7eaa229bc<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/mips.corona<\/td>\n<td>9a983a4cee09e77100804f6dae7f678283e2d2ff32d8dbcf356ef40dcdff8070<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/arm.corona<\/td>\n<td>060547ee0be2d5e588e38d1ad11e1827ba6ce7b443b67e78308571e9d455d79b<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/ppc.corona<\/td>\n<td>dcb52fbd54fd38b6111670554a20a810b9caccc0afce7669ba34fc729afe2049<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/mpsl.corona<\/td>\n<td>60be483526d1ae9576617907b80a781296404220affcf01d47e9e2bfa2cdc55f<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/x86.corona<\/td>\n<td>12d3d391462f7b66985f216dbca330ac13a75263d0f9439692fd53065eeb5657<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/arm7.corona<\/td>\n<td>0c016ce7576b5c041ea1e36e8561214dee85d7ce87a50bb092def026881183f4<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/spc.corona<\/td>\n<td>4e21b2547a8fc15b1435441fa6567b4626dfa3049c2dd6911b333449dd6756fd<\/td>\n<\/tr>\n<tr>\n<td>2020-03-04<\/td>\n<td>45.84.196[.]75\/bins\/sh4.corona<\/td>\n<td>049a1570e76c025d431997fb7a9963d465959a6c470eeeab4ac8420f6e3829a6<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/arc.bot<\/td>\n<td>3df226be94f99ece7875032e41b025b5a19152e1d63bd0cda2af204f667cd140<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/arm5.bot<\/td>\n<td>768430ee908a6fc5fa6d5785b2ec15cd334fbc302d98ee3045aa44c2137a7a35<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/arm6.bot<\/td>\n<td>228eac174dcf166c97a7baa854ab3803ade9934915ef701dd0634f033ca252fe<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/arm7.bot<\/td>\n<td>eac71fd11ebb70ab256afa417e6621de0b66ec4830eb229b04192f9f866037ca<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/arm.bot<\/td>\n<td>1734610c5d09be7a0e4459f8bd2a9373ae3da8812165f08733b3a5efdd38ff29<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/m68k.bot<\/td>\n<td>b6e859812efecce70041ad5fda2b4881b1b1a89e6ae982cb43af67b301640620<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/mips.bot<\/td>\n<td>8f047170fceb05164429968ae24839f1419e58e30fd10057ab14291bfe0945c1<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/mpsl.bot<\/td>\n<td>7dbd6923a425d3464318e22c3bd88ea1e8f2d0ae914ac29664f95cef5cb4d748<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/ppc.bot<\/td>\n<td>635d7bb69b758cb7df9b9fcab9de7671139fdbe3f03f79299476706cfe54553d<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/sh4.bot<\/td>\n<td>d400cb7c2bb69011c8b21d8f24da08ac31cc55ee88b45f21cf4e4a1683548e38<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/spc.bot<\/td>\n<td>83022c991d5da2725b8e39128862e5ae987d53846e0539655ab66f7ed3355a6b<\/td>\n<\/tr>\n<tr>\n<td>2020-03-09<\/td>\n<td>45.84.196[.]75\/bins\/x86.bot<\/td>\n<td>bca0cffe842196be283d28572d7c43a53c1e5e5a231ad3d7969aa40965e2406b<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/arc.bot<\/td>\n<td>a3a674b3481e3b9e5e12b332f4508134db6405f59d3c8dc74aaa4943c84fafb6<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/arm5.bot<\/td>\n<td>c9c546967620830745796b87993e9b89d3405e0a8cc083f09bfbf08675ef87ba<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/arm6.bot<\/td>\n<td>72d44204ad26a974b1bdbed2970955670ce2697bfe99e697eb7df255cccea0be<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/arm7.bot<\/td>\n<td>62ad931aa37a227211ccb1d89050630c9122e2d24eecef824416e913f578f969<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/arm.bot<\/td>\n<td>be1d0f53d7647a46047102ffdc063d06be511ffc9832a72cca1420ac2811f807<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/m68k.bot<\/td>\n<td>46d868913a330e5b36673c229240dc971b535f95f091fc9bd9c9fa315c7cf838<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/mips.bot<\/td>\n<td>7b0176099dd032a5c2d6834e8840af78f91332a0b7cee000746bcaec5fbb3e9b<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/mpsl.bot<\/td>\n<td>940fa7d9ef770a3e70c5f227a0ad1aaac88071f3c4879a2c92e7c155d9626d73<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/ppc.bot<\/td>\n<td>514e5ca58df6ba22708046cd034af05e3a88f80da893e4d7e2124137086468b0<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/sh4.bot<\/td>\n<td>af6a51c012062078d6fcf112b3e4239eb029fc895f5f74fb5e40eb0b71fe67ce<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/spc.bot<\/td>\n<td>3ae3b155c274edb389fe9d06bf9349bfd829c0e55db34238c3a8f53da16b4d98<\/td>\n<\/tr>\n<tr>\n<td>2020-03-10<\/td>\n<td>45.84.196[.]75\/bins\/x86.bot<\/td>\n<td>5060a00c235566726cdf0e0a07f022cdbf2f59cff636f37b19576bf98ea70027<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/arc.bot<\/td>\n<td>906d945b00465b1b7f6a828eb47edc0e875e745b7638258afbe8032d4c2d6ac6<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/arm5.bot<\/td>\n<td>27f26c710b4d461396749acfbe8fadc57ba19dcb70b1e1890599ca938c0d6aec<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/arm6.bot<\/td>\n<td>162add056aef065ff0e19242ca8674698586b295b2f75c03f9f22a14f6e16ff3<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/arm7.bot<\/td>\n<td>948776a3c50a8e6a2f58f27f29095b63f7bbc0f8b5aeb08c6a4ba27558b13a0d<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/arm.bot<\/td>\n<td>3061fd4a4a57e8c1948c30728f82a82213a1907ee8fccb7037dd1649e1c51e0e<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/m68k.bot<\/td>\n<td>941e2833d313d33e53db5416718ba4c68609ac0537d3f16bf600c0bee2f562d0<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/mips.bot<\/td>\n<td>8473645820c828758a7655730ab6bd6967c97872687f4b6d5eff769387f59059<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/mpsl.bot<\/td>\n<td>1a4efe25a8f660e44abdb82d84912cf24db7eabfe9ad3c4c12080ca05636d73b<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/ppc.bot<\/td>\n<td>dbcd46dabd2fbddb40e17c2f7790950086b0108370d2448ff5fe407a9cd83103<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/sh4.bot<\/td>\n<td>751b0fe6616034a72235c7d3021e3f54f0634b9b5b29fed56cd44843389da0e9<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/spc.bot<\/td>\n<td>5a69a7c079555b53263a64dc0757f2168e255b29bc17ab846aceb2f8d08f3830<\/td>\n<\/tr>\n<tr>\n<td>2020-03-12<\/td>\n<td>45.84.196[.]75\/bins\/x86.bot<\/td>\n<td>47f9e2e65b17b937bc32fc6bb5bfbbb0efd2b86305b9d29a976512cbcc049d28<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><a id=\"post-105352-appendix\"><\/a>\u4ed8\u9332<\/h2>\n<h3><a id=\"post-105352-idapython-6.x-7.3-script\"><\/a>IDApython 6.x - 7.3\u7528\u30b9\u30af\u30ea\u30d7\u30c8<\/h3>\n<pre class=\"lang:python decode:true\">import ida_kernwin\r\nfrom idc import *\r\nfrom idautils import *\r\nfrom idaapi import *\r\n\r\ndef decode_str(encoded_str):\r\n    if len(encoded_str) == 0:\r\n        return \"\"\r\n\r\n    buf = list(encoded_str)\r\n    result = \"\"\r\n    buf[0] = chr(ord(buf[0]) - 2)\r\n\r\n    slen = len(encoded_str)\r\n\r\n    v1 = slen \/ 2;\r\n    if v1 > 0:\r\n        i = v1\r\n        while True:\r\n            if  i >= slen:\r\n\t           break;\r\n            buf[i] = chr(ord(buf[i]) - 1);\r\n            i += 1\r\n\r\n    v2 = slen \/ 4;\r\n    if v2 > 0:\r\n        j = v2\r\n        while True:\r\n            if j >= slen:\r\n                break;\r\n            buf[j] = chr(ord(buf[j]) - 1)\r\n            j += 1\r\n\r\n    for k in xrange(0, slen):\r\n        buf[k] = chr(ord(buf[k]) - 1)\r\n\r\n    v3 = 0\r\n    if slen > 24:\r\n        if slen > 99:\r\n            v3 = slen \/ 5 - 3;\r\n        else:\r\n            v3 = slen \/ 5 - 1;\r\n    else:\r\n        v3 = slen \/ 5;\r\n\r\n    l = v3\r\n    while True:\r\n        if l >= slen:\r\n            break\r\n        buf[l]= chr(0);\r\n        l += 1\r\n\r\n    result = \"\".join(buf)\r\n    return result\r\n\r\n\r\ndef main():\r\n    for addr in XrefsTo(0x080482A0, flags=0):\r\n        print(\"[*] addr.frm: {0}\".format(hex(addr.frm)))\r\n        prev_addr = PrevHead(addr.frm)\r\n\r\n        encoded_str = \"\"\r\n        if GetMnem(prev_addr) == \"push\":\r\n            str_addr = GetOperandValue(prev_addr, 0)\r\n        elif GetMnem(prev_addr) == \"mov\":\r\n            str_addr = GetOperandValue(prev_addr, 1)\r\n            \r\n        print(\"\\tstr_addr: {0}\".format(hex(str_addr)))\r\n        encoded_str = GetString(str_addr)\r\n        print(\"\\tencoded_str: {0}\".format(encoded_str))\r\n        decoded_str = decode_str(encoded_str)\r\n        print(\"\\tdecoded_str: {0}\".format(decoded_str))\r\n\r\nif __name__ == '__main__':\r\n    main()\r\n<\/pre>\n<h3>IDApython 7.4 \u7528\u30b9\u30af\u30ea\u30d7\u30c8<\/h3>\n<pre class=\"lang:python decode:true\">def decrypt_string(enc_str):\r\n    strlen = len(enc_str)\r\n    str = chr(ord(enc_str[0])-2) + enc_str[1:]\r\n    v1 = strlen\/2\r\n    if v1&gt;0:\r\n        str = str[0:v1] + ''.join([chr(ord(x)-1) for x in str[v1:]])\r\n    v2 = strlen\/4\r\n    if v2&gt;0:\r\n        str = str[0:v2] + ''.join([chr(ord(x)-1) for x in str[v2:]])\r\n\r\n    str = ''.join([chr(ord(x)-1) for x in str])\r\n\r\n    if strlen&gt;24:\r\n        if strlen&gt;99:\r\n            v9 = strlen\/5 - 3\r\n        else:\r\n            v9 = strlen\/5 - 1\r\n    else:\r\n        v9 = strlen\/5\r\n\r\n    str = str[:v9] + chr(0) + str[v9+1:]\r\n    return str\r\n\r\ndef main():\r\n    strrefs = []\r\n    for addr in XrefsTo(0x080482a0, flags=0):\r\n        prev_ins = prev_head(addr.frm)\r\n        ref = get_operand_value(prev_ins, 1)\r\n        if ref&gt;0:\r\n            strrefs.append(ref)\r\n\r\n    for ref in strrefs:\r\n        enc_str = get_strlit_contents(ref)\r\n        print \"Encrypted string: %s\" %enc_str\r\n        dec_str = decrypt_string(enc_str)\r\n        print \"Decrypted string: %s\" %dec_str\r\n\r\nif __name__ == '__main__':\r\n    main()\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 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