{"id":91017,"date":"2021-09-20T11:23:00","date_gmt":"2021-09-20T02:23:00","guid":{"rendered":"https:\/\/softantenna.com\/wp\/?p=91017"},"modified":"2021-09-20T11:23:00","modified_gmt":"2021-09-20T02:23:00","slug":"new-malware-using-windows-subsystem-for-linux","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/new-malware-using-windows-subsystem-for-linux\/","title":{"rendered":"Windows Subsystem for Linux\u3092\u5229\u7528\u3057\u305f\u65b0\u7a2e\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u304c\u898b\u3064\u304b\u308b"},"content":{"rendered":"<p><img decoding=\"async\" style=\"display:block; margin-left:auto; margin-right:auto;\" src=\"https:\/\/softantenna.com\/blog\/wp-content\/uploads\/2016\/08\/hacker.jpg\" alt=\"Hacker\" title=\"hacker.jpg\" border=\"0\" width=\"960\" height=\"720\" \/><\/p>\n<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u4fee\u304c\u3001Windows 10\u4e0a\u3067Linux\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u300cWindows Subsystem for Linux(WSL)\u300d\u3092\u5229\u7528\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u3092\u5bc6\u304b\u306b\u653b\u6483\u3059\u308b\u65b0\u7a2e\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u767a\u898b\u3057\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057\u305f(<a href=\"https:\/\/betanews.com\/2021\/09\/18\/new-malware-uses-windows-subsystem-for-linux-as-an-attack-vector\/\">BetaNews<\/a>)\u3002<\/p>\n<p>\u30de\u30eb\u30a6\u30a7\u30a2\u306f\u60aa\u610f\u306e\u3042\u308bLinux\u30d0\u30a4\u30ca\u30ea\u3092\u4f7f\u7528\u3057\u3001\u3053\u308c\u307e\u3067\u7406\u8ad6\u4e0a\u306f\u53ef\u80fd\u3067\u3042\u308b\u3082\u306e\u306e\u78ba\u8a8d\u3055\u308c\u3066\u3044\u306a\u304b\u3063\u305f\u624b\u6cd5\u3092\u7528\u3044\u3066\u653b\u6483\u3092\u884c\u3044\u307e\u3059\u3002\u767a\u898b\u8005\u3067\u3042\u308b<a href=\"https:\/\/blog.lumen.com\/no-longer-just-theory-black-lotus-labs-uncovers-linux-executables-deployed-as-stealth-windows-loaders\/\">Black Lotus Labs<\/a>\u793e\u306e\u7814\u7a76\u8005\u306f\u300cWSL\u3092\u60aa\u7528\u3057\u3066\u5f8c\u7d9a\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u884c\u70ba\u306e\u6700\u521d\u306e\u4f8b\u300d\u3068\u8aac\u660e\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4e3b\u306bPython\u3067\u66f8\u304b\u308c\u3001Debian OS\u7528\u306eLinux\u30d0\u30a4\u30ca\u30ea\u30d5\u30a9\u30fc\u30de\u30c3\u30c8ELF(Executable and Linkable Format)\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u8907\u6570\u306e\u60aa\u610f\u306e\u3042\u308b\u30d5\u30a1\u30a4\u30eb\u304c\u78ba\u8a8d\u3055\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u304c\u30ea\u30e2\u30fc\u30c8\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u53d6\u5f97\u3057\u305f\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u30ed\u30fc\u30c0\u30fc\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001Windows\u306eAPI\u30b3\u30fc\u30eb\u3092\u4f7f\u3063\u3066\u5b9f\u884c\u4e2d\u306e\u30d7\u30ed\u30bb\u30b9\u306b\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u6ce8\u5165\u3057\u307e\u3059\u3002<\/p>\n<blockquote><p>These files acted as loaders running a payload that was either embedded within the sample or retrieved from a remote server and was then injected into a running process using Windows API calls. While this approach was not particularly sophisticated, the novelty of using an ELF loader designed for the WSL environment gave the technique a detection rate of one or zero in Virus Total, depending on the sample, as of the time of this writing.\n<\/p><\/blockquote>\n<p>\u624b\u6cd5\u306f\u7279\u306b\u6d17\u7df4\u3055\u308c\u3066\u3044\u306a\u3044\u3082\u306e\u306e\u3001WSL\u74b0\u5883\u7528\u306b\u8a2d\u8a08\u3055\u308c\u305fELF\u30ed\u30fc\u30c0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u3044\u3046\u76ee\u65b0\u3057\u3055\u304c\u6ce8\u76ee\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u30de\u30eb\u30a6\u30a7\u30a2\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u306f2\u3064\u5b58\u5728\u3057\u30011\u3064\u76ee\u306f\u7d14\u7c8b\u306aPython\u3092\u4f7f\u7528\u3057\u305f\u3082\u306e\u3067\u30012\u3064\u76ee\u306fPython\u304b\u3089ctypes\u3092\u4f7f\u7528\u3057\u3066\u69d8\u3005\u306aWindows API\u3092\u547c\u3073\u51fa\u3057\u3001PowerShell\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u8d77\u52d5\u3059\u308b\u3082\u306e\u3060\u305d\u3046\u3067\u3059\u3002<\/p>\n<p>Windows Subsystem for Linux\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30e6\u30fc\u30b6\u30fc\u304c\u767a\u898b\u3057\u3065\u3089\u304f\u3001Windows\u7528\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u304c\u691c\u51fa\u3057\u3065\u3089\u3044\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u8005\u306f\u6307\u6458\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u4fee\u304c\u3001Windows 10\u4e0a\u3067Linux\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u300cWindows Subsystem for Linux(WSL)\u300d\u3092\u5229\u7528\u3057\u3066\u30b7\u30b9\u30c6\u30e0\u3092\u5bc6\u304b\u306b\u653b\u6483\u3059\u308b\u65b0\u7a2e\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u767a\u898b\u3057\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3057 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":91018,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"aside","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[3],"tags":[677,3298],"class_list":["post-91017","post","type-post","status-publish","format-aside","has-post-thumbnail","hentry","category-windows","tag-malware","tag-windows","post_format-post-format-aside"],"_links":{"self":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/91017","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/comments?post=91017"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/91017\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/91018"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=91017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=91017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=91017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}