{"id":106299,"date":"2017-02-10T13:00:33","date_gmt":"2017-02-10T21:00:33","guid":{"rendered":"https:\/\/unit42.paloaltonetworks.com\/?p=106299"},"modified":"2020-04-09T21:49:20","modified_gmt":"2020-04-10T04:49:20","slug":"unit42-stegbaus-because-sometimes-xor-just-isnt-enough","status":"publish","type":"post","link":"https:\/\/unit42.paloaltonetworks.com\/ja\/unit42-stegbaus-because-sometimes-xor-just-isnt-enough\/","title":{"rendered":"StegBaus: XOR\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\u306a\u3053\u3068\u3082\u3042\u308b\u306e\u3067..."},"content":{"rendered":"<h2>\u6982\u8981<\/h2>\n<p>\u3053\u306e1\u9031\u9593\u3001\u79c1\u305f\u3061\u306e\u30c1\u30fc\u30e0\u306f\u3001\u904e\u53bb\u306e\u7d4c\u9a13\u306b\u7167\u3089\u3057\u5408\u308f\u305b\u3066\u3001\u8907\u6570\u306e\u65e2\u77e5\u306e\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u306b\u5408\u81f4\u3059\u308b\u30de\u30eb\u30a6\u30a7\u30a2 \u30b5\u30f3\u30d7\u30eb\u306e\u96c6\u56e3\u3092\u7a81\u304d\u6b62\u3081\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001\u3044\u305a\u308c\u3082\u305d\u308c\u305e\u308c\u306e\u5178\u578b\u7684\u306a\u30de\u30eb\u30a6\u30a7\u30a2\u7279\u6027\u3092\u793a\u3057\u3001\u3053\u308c\u3089\u306e\u30d5\u30a1\u30df\u30ea\u306b\u7531\u6765\u3059\u308b\u65e2\u77e5\u306e\u30b3\u30de\u30f3\u30c9 \u30a2\u30f3\u30c9 \u30b3\u30f3\u30c8\u30ed\u30fc\u30eb(C2)\u30b5\u30fc\u30d0\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u6700\u521d\u306e\u9759\u7684\u5206\u6790\u3067\u306f\u3001\u3053\u308c\u3089\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u898b\u305f\u76ee\u4e0a\u3067\u306f\u3059\u3079\u3066\u540c\u4e00\u306e\u3082\u306e\u3067\u3057\u305f\u306e\u3067\u3001\u79c1\u305f\u3061\u306f\u65b0\u578b\u306e\u30ed\u30fc\u30c0\u30fc\u30921\u3064\u767a\u898b\u3057\u305f\u3082\u306e\u3068\u601d\u3044\u8fbc\u3093\u3067\u3044\u307e\u3057\u305f\u3002\u3053\u306e\u3068\u304d\u306b\u7a81\u304d\u6b62\u3081\u305f\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u306b\u306fDarkComet\u3001LuminosityLink RAT\u3001Pony\u3001ImmenentMonitor\u306e\u307b\u304b\u3001\u8907\u6570\u306e\u30b7\u30a7\u30eb\u30b3\u30fc\u30c9\u304c\u5c11\u3005\u3042\u308a\u307e\u3057\u305f\u3002\u7279\u5225\u4ed5\u69d8\u306e\u30b9\u30c6\u30ac\u30ce\u30b0\u30e9\u30d5\u30a3\u30fc\u306e\u4f7f\u7528\u3001\u304a\u3088\u3073\u57cb\u3081\u8fbc\u307f\u578bDLL\u306e\u4e2d\u306b\u898b\u3089\u308c\u308bPDB\u6587\u5b57\u5217\u306b\u56e0\u3093\u3067\u3001\u79c1\u305f\u3061\u306f\u3053\u306e\u60aa\u610f\u306e\u3042\u308b\u30ed\u30fc\u30c0\u30fc\u3092StegBaus\u3068\u547c\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n<p>\u524d\u8a18\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u304c\u4ee5\u524d\u95a2\u4e0e\u3057\u305f\u3053\u3068\u306e\u3042\u308b\u611f\u67d3\u4e8b\u4f8b\u304c\u591a\u6570\u3042\u308b\u305f\u3081\u3001\u653b\u6483\u8005\u306b\u3053\u3046\u3057\u305f\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u3092\u88ab\u5bb3\u8005\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u4e0a\u3067\u306e\u5b9f\u884c\u3092\u5bb9\u6613\u306b\u3055\u305b\u3066\u3057\u307e\u3046\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u624b\u6cd5\u306f\u65b0\u3057\u3044\u3082\u306e\u306a\u3089\u4f55\u3067\u3042\u308c\u3001\u771f\u5263\u306b\u53d7\u3051\u6b62\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u611f\u67d3\u306e\u7591\u3044\u304c\u3042\u308b\u3082\u306e\u306e\u307e\u3060\u611f\u67d3\u3068\u306f\u8a00\u3044\u5207\u308c\u306a\u3044\u3082\u306e\u3092\u898b\u6975\u3081\u308b\u52aa\u529b\u3092\u512a\u5148\u3057\u3066\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u672c\u4ef6\u306e\u30ed\u30fc\u30c0\u30fc\u306f\u975e\u5e38\u306b\u591a\u304f\u306e\u70b9\u3067\u7279\u7570\u3067\u3059\u3002\u6700\u3082\u76ee\u3092\u5f15\u304f\u306e\u306f\u3001\u30ed\u30fc\u30c0\u30fc\u8a2d\u5b9a\u306e\u4ed6\u306b\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u3082\u96a0\u3059\u306e\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u30b9\u30c6\u30ac\u30ce\u30b0\u30e9\u30d5\u30a3\u30fc\u3067\u3059\u3002\u3053\u306e\u6a5f\u80fd\u306b\u3064\u3044\u3066\u306f\u5206\u6790\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u5f8c\u8ff0\u3057\u307e\u3059\u3002\u30ed\u30fc\u30c0\u30fc\u306f\u4e00\u822c\u7684\u306a\u624b\u6cd5\u3082\u5229\u7528\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070<a href=\"https:\/\/www.adlice.com\/runpe-hide-code-behind-legit-process\/\" target=\"_blank\" rel=\"noopener noreferrer\" data-page-track=\"true\" data-page-track-value=\"company:unit42-stegbaus-because-sometimes-xor-just-isnt-enough: section: \">RunPE<\/a>\u3068\u3044\u3046\u65b9\u6cd5\u306b\u3088\u308a\u3001\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u65b0\u3057\u3044\u30d7\u30ed\u30bb\u30b9\u3068\u3057\u3066\u30e1\u30e2\u30ea\u306b\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u3053\u306e\u65b9\u6cd5\u306f\u4f55\u5e74\u306b\u3082\u308f\u305f\u3063\u3066\u30cd\u30c3\u30c8\u4e0a\u3067\u78ba\u8a8d\u3055\u308c\u3066\u304a\u308a\u3001\u901a\u5e38\u3001\u30db\u30b9\u30c8 \u30d7\u30ed\u30bb\u30b9\u3001\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u30b9\u30ec\u30c3\u30c9\u5316\u3001\u304a\u3088\u3073\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u3092\u5229\u7528\u3057\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u30b9\u30c6\u30c3\u30d7\u306f\u30ed\u30fc\u30c0\u30fc\u5185\u3067\u306f\u6bd4\u8f03\u7684\u9759\u7684\u306a\u3082\u306e\u3067\u3042\u308b\u3088\u3046\u306b\u898b\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u82e5\u5e72\u306e\u9055\u3044\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u9055\u3044\u3092\u3001\u79c1\u305f\u3061\u306f\u5c0e\u5165\u6642\u523b\u306b\u57fa\u3065\u3044\u3066\u8b58\u5225\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u4e00\u4f8b\u3068\u3057\u3066\u3001\u5927\u591a\u6570\u306e\u30b5\u30f3\u30d7\u30eb\u304c\u30cd\u30c3\u30c8\u4e0a\u3067\u78ba\u8a8d\u3055\u308c\u308b\u524d\u306b\u5c11\u306a\u304f\u3068\u30826\u304b\u6708\u306e\u30c6\u30b9\u30c8\u306b\u4f7f\u308f\u308c\u305f\u3068\u601d\u308f\u308c\u308b\u30b5\u30f3\u30d7\u30eb\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>\u914d\u4fe1<\/h3>\n<p>StegBaus\u30ed\u30fc\u30c0\u30fc\u306b\u985e\u4f3c\u3057\u3066\u3044\u308b\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u3092\u4f34\u3063\u305f.NET \u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u5143\u3005\u30012016\u5e74\u306e\u4e2d\u9803\u306b\u30c6\u30b9\u30c8\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u305d\u306e\u3068\u304d\u306f\u3001\u96e3\u8aad\u5316\u306e\u7a0b\u5ea6\u306f\u4eca\u306e\u3082\u306e\u3088\u308a\u3082\u4f4e\u304f\u3001\u30c6\u30b9\u30c8\u7528\u306e\u8a9e\u53e5\u3084\u6587\u5b57\u5217\u304c\u8ffd\u52a0\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u3002\u540c\u3058\u7279\u5fb4\u3092\u6709\u3059\u308b\u95a2\u9023\u30b5\u30f3\u30d7\u30eb\u3092\u63a2\u3057\u6c42\u3081\u3066\u3044\u308b\u9593\u306b\u3001\u79c1\u305f\u3061\u306f<a href=\"https:\/\/securelist.com\/blog\/research\/69481\/a-flawed-ransomware-encryptor\/\" target=\"_blank\" rel=\"noopener noreferrer\" data-page-track=\"true\" data-page-track-value=\"company:unit42-stegbaus-because-sometimes-xor-just-isnt-enough: section:\u914d\u4fe1\">KazyLoader<\/a>\u3068\u3044\u3046.NET\u30d1\u30c3\u30ab\u30fc\u304c\u985e\u4f3c\u306e\u6a5f\u80fd\u3092\u5099\u3048\u3066\u3044\u308b\u3053\u3068\u3092\u7a81\u304d\u6b62\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002KazyLoader\u306f\u3001BMP\u30d5\u30a1\u30a4\u30eb\u306b\u304a\u3051\u308b\u30c7\u30fc\u30bf\u96a0\u3057\u306e\u624b\u6bb5\u306b\u52a0\u3048\u3066\u3001\u985e\u4f3c\u306e\u6697\u53f7\u5316\u30b9\u30ad\u30fc\u30e0\u3082\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u3046\u3057\u305f\u985e\u4f3c\u70b9\u306f\u3042\u308b\u3082\u306e\u306e\u3001StegBaus\u306b\u304a\u3044\u3066\u306f\u5de7\u5999\u5316\u304c\u9032\u307f\u3001KazyLoader\u30b3\u30fc\u30c9\u30d9\u30fc\u30b9\u306e\u53ef\u8996\u6027\u304c\u9650\u5b9a\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304b\u3089\u3001\u3053\u306e2\u3064\u306e\u30d5\u30a1\u30df\u30ea\u3092\u7d50\u3073\u3064\u3051\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u56f0\u96e3\u3067\u3059\u3002<\/p>\n<p>Palo Alto Networks\u304c\u7279\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u305fStegBaus\u306e\u6700\u521d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u30012016\u5e7412\u670830\u65e5\u306b\u78ba\u8a8d\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u3068\u304d\u306f\u591a\u6570\u306e\u30b5\u30f3\u30d7\u30eb\u304c\u4ed8\u968f\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u305d\u306e\u5f8c\u3001\u5b58\u5728\u304c\u78ba\u8a8d\u3055\u308c\u7d9a\u3051\u3066\u3044\u307e\u3059\u3002StegBaus\u304c\u914d\u4fe1\u3057\u3066\u3044\u308b\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u306f\u3059\u3079\u3066\u5546\u54c1\u3068\u3057\u3066\u6d41\u901a\u3057\u3066\u3044\u308b\u30de\u30eb\u30a6\u30a7\u30a2\u3067\u3042\u308a\u3001\u305d\u306e\u591a\u304f\u306f\u904e\u53bb\u306b\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304c\u30cd\u30c3\u30c8\u306b\u6f0f\u3048\u3044\u3057\u307e\u3057\u305f\u3002\u3053\u306e\u4e8b\u5b9f\u306b\u3088\u308a\u3001StegBaus\u306e\u4f5c\u6210\u8005\u304c\u81ea\u5206\u5c02\u7528\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u4f5c\u6210\u3057\u305f\u306e\u304b\u3001\u30cd\u30c3\u30c8\u4e0a\u306b\u3067\u898b\u3064\u3051\u305f\u30b5\u30f3\u30d7\u30eb\u3092\u518d\u5229\u7528\u3057\u305f\u306e\u304b\u3001\u3042\u308b\u3044\u306f\u3053\u306e\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u3092\u72af\u7f6a\u6d3b\u52d5\u306b\u5229\u7528\u3057\u3066\u3044\u308b\u30b0\u30eb\u30fc\u30d7\u3068\u7d50\u3073\u3064\u304d\u304c\u3042\u308b\u306e\u304b\u3001\u5224\u65ad\u3059\u308b\u306e\u306f\u56f0\u96e3\u3067\u3059\u3002<\/p>\n<p>\u30cd\u30c3\u30c8\u4e0a\u306b\u3042\u308bStegBuas\u3092\u914d\u4fe1\u3059\u308b\u306e\u306b\u3044\u3061\u3070\u3093\u3088\u304f\u4f7f\u308f\u308c\u3066\u3044\u308b\u30d5\u30a1\u30a4\u30eb\u540d\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li>image44.scr<\/li>\n<li>barbiure.exe<\/li>\n<li>image56.scr<\/li>\n<li>image.scr<\/li>\n<li>corben.exe<\/li>\n<li>picture.scr<\/li>\n<li>Netsparker.exe<\/li>\n<\/ul>\n<p>\u6700\u3082\u4e00\u822c\u7684\u306aHTTP\u63a5\u7d9a\u60c5\u5831\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li>Kimki[.]ru , POST , \/chamber\/panelnew\/gate.php<\/li>\n<li>kimki[.]ru, POST, \/nelson\/panelnew\/gate.php<\/li>\n<li>kimki[.]ru , POST , \/emeka\/panelnew\/gate.php<\/li>\n<li>oxylala[.]gdn , POST , \/emeka\/panelnew\/gate.php<\/li>\n<li>oxylala[.]gdn , POST , \/charly\/panelnew\/gate.php<\/li>\n<li>oxylala[.]gdn , POST , \/asaba\/panelnew\/gate.php<\/li>\n<li>oxylala[.]gdn , POST , \/victor\/panelnew\/gate.php<\/li>\n<li>oxylala[.]gdn , POST , \/mandela\/panelnew\/gate.php<\/li>\n<li>oxylala[.]gdn , POST , \/asaba\/panelnew\/gate.php<\/li>\n<li>minecon[.]co, POST, \/Panel\/gate.php<\/li>\n<li>informer.pe[.]hu , POST , \/Server\/<\/li>\n<\/ul>\n<p>\u6700\u3082\u4e00\u822c\u7684\u306aDNS\u30af\u30a8\u30ea\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<ul>\n<li>custom[.]generatione[.]tech<\/li>\n<li>goodluckjayjay[.]duckdns[.]org<\/li>\n<li>slyopeznetwr[.]ddns[.]net<\/li>\n<li>11live[.]zapto[.]org<\/li>\n<li>goodluckyugo[.]duckdns[.]org<\/li>\n<li>akudon[.]chickenkiller[.]com<\/li>\n<li>informer[.]pe[.]hu<\/li>\n<li>files[.]catbox[.]moe<\/li>\n<li>tags[.]bkrtx[.]com<\/li>\n<li>sg[.]symcb[.]com<\/li>\n<li>minecon[.]co<\/li>\n<li>kimki[.]ru<\/li>\n<li>oxylala[.]gdn<\/li>\n<\/ul>\n<h3>\u5206\u6790<\/h3>\n<p>\u307e\u305a\u3001StegBaus\u306f.NET\u306e\u30b3\u30f3\u30d1\u30a4\u30eb\u6e08\u307f\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3068\u3044\u3046\u5f62\u3067\u914d\u4fe1\u3055\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u306fConfuser v1.9.0.0\u306e\u96e3\u8aad\u5316\u3092\u5229\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u6700\u521d\u306b\u884c\u3063\u305f\u30b5\u30f3\u30d7\u30eb\u306e\u9759\u7684\u5206\u6790\u306b\u3088\u308a\u3001.NET\u30ea\u30bd\u30fc\u30b9\u3068\u3057\u3066\u57cb\u3081\u8fbc\u307e\u308c\u3066\u3044\u308bPNG (portable network graphics)\u753b\u50cf\u30d5\u30a1\u30a4\u30eb\u304c\u8907\u6570\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u3063\u3066\u3044\u307e\u3059\u3002\u4e0b\u306e\u56f3\u306b\u3053\u308c\u3089\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\">\n<figure style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-01.png\" alt=\"\u56f31 PNG\u30ea\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\" width=\"900\" height=\"497\" \/><figcaption class=\"wp-caption-text\">\u56f31 PNG\u30ea\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb<\/figcaption><\/figure>\n<\/div>\n<p>\u5b9f\u884c\u6642\u306b\u3001StegBaus\u306f\u65b0\u305f\u306bDLL\u3092\u30e1\u30e2\u30ea\u7a7a\u9593\u306b\u30ed\u30fc\u30c9\u3057\u3001\u5b9f\u884c\u3092DLL\u306e\u30e1\u30a4\u30f3\u95a2\u6570\u306b\u4efb\u305b\u307e\u3059\u3002\u3053\u306e\u30e1\u30a4\u30f3\u95a2\u6570\u306f\u3001\u306e\u3061\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u5358\u72ec\u306e\u6587\u5b57(A\u3001K\u3001\u307e\u305f\u306fQ)\u306b\u30ea\u30cd\u30fc\u30e0\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306eDLL\u306f\u5b8c\u5168\u306b\u96e3\u8aad\u5316\u3092\u89e3\u9664\u3057\u3066\u3042\u308a\u3001\u5206\u6790\u5bfe\u8c61\u3068\u306a\u3063\u305f\u3069\u306e\u30d0\u30ea\u30a8\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u3082\u3001\u5185\u90e8\u540d\u304cA.dll\u3067\u3042\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u95a2\u6570\u306f\u96e3\u8aad\u5316\u304c\u4e00\u5207\u3055\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u56f32\u306b\u793a\u3059\u3068\u304a\u308a\u3001\u306f\u3063\u304d\u308a\u3068\u8aad\u3080\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div align=\"center\">\n<figure style=\"width: 476px\" class=\"wp-caption aligncenter\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-02.png\" alt=\"\u56f32 \u95a2\u6570\u4e00\u89a7\" width=\"476\" height=\"806\" \/><figcaption class=\"wp-caption-text\">\u56f32 \u95a2\u6570\u4e00\u89a7<\/figcaption><\/figure>\n<\/div>\n<p>\u4e0a\u306e\u95a2\u6570\u4e00\u89a7\u304b\u3089\u5206\u304b\u308b\u3088\u3046\u306b\u3001StegBaus\u306b\u306f\u6bd4\u8f03\u7684\u5358\u7d14\u306a\u3053\u3068\u3092\u884c\u3046\u3068\u601d\u308f\u308c\u308b\u95a2\u6570\u304c\u591a\u6570\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u95a2\u6570\u306e\u5206\u6790\u3092\u7d42\u3048\u3066\u307f\u308b\u3068\u3001\u95a2\u6570\u306f\u305d\u306e\u540d\u524d\u304c\u793a\u3059\u3053\u3068\u3092\u5b9f\u969b\u306b\u305d\u306e\u901a\u308a\u306b\u884c\u3046\u3053\u3068\u304c\u660e\u3089\u304b\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u5404\u95a2\u6570\u306b\u3064\u3044\u3066\u306e\u5b8c\u5168\u306a\u5206\u6790\u7d50\u679c\u306f\u3054\u7d39\u4ecb\u3057\u307e\u305b\u3093\u304c\u3001\u6700\u3082\u8208\u5473\u6df1\u3044\u95a2\u6570\u306e\u4e00\u90e8\u306b\u3064\u3044\u3066\u3001\u30c7\u30fc\u30bf\u3092\u96a0\u3059\u624b\u6cd5\u3092\u8aac\u660e\u3057\u306a\u304c\u3089\u8003\u5bdf\u3092\u3057\u3066\u884c\u304d\u307e\u3059\u3002<\/p>\n<p>\u6700\u521d\u306e\u3001\u96e3\u8aad\u5316\u304c\u8457\u3057\u304f\u65bd\u3055\u308c\u3066\u3044\u308b\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3092\u5206\u6790\u3057\u3001\u57cb\u3081\u8fbc\u307f\u6e08\u307f\u30ea\u30bd\u30fc\u30b9\u3092\u767a\u898b\u3057\u305f\u7d50\u679c\u3001\u79c1\u305f\u3061\u306f\u4efb\u610f\u306e\u30ea\u30bd\u30fc\u30b9\u7528\u306e\u3053\u306eDLL\u306b\u3064\u3044\u3066\u3082\u8abf\u67fb\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3057\u305f\u3002\u3059\u308b\u3068\u3001\u4f5c\u6210\u8005\u304c\u3053\u306e\u30ea\u30bd\u30fc\u30b9 \u30bb\u30af\u30b7\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u3001Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u6e08\u307f\u30c7\u30fc\u30bf\u306eblob\u3092\u591a\u6570\u57cb\u3081\u8fbc\u3093\u3067\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3057\u305f\u3002\u305d\u306e\u69d8\u5b50\u3092\u4e0b\u306e\u56f33\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\">\n<figure style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-03.png\" alt=\"\u56f33 \u57cb\u3081\u8fbc\u307f\u6e08\u307f\u306eBase64\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\" width=\"900\" height=\"195\" \/><figcaption class=\"wp-caption-text\">\u56f33 \u57cb\u3081\u8fbc\u307f\u6e08\u307f\u306eBase64\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0<\/figcaption><\/figure>\n<\/div>\n<p>\u56f33\u306b\u793a\u3059\u30ea\u30bd\u30fc\u30b9\u306f\u30012\u3064\u3068\u3082Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u6e08\u307f\u30c7\u30fc\u30bf\u3092\u542b\u3093\u3067\u304a\u308a\u3001Base64\u30a8\u30f3\u30b3\u30fc\u30c9\u6e08\u307f\u30c7\u30fc\u30bf\u306f\u3044\u305a\u308c\u3082\u5225\u3005\u306eDLL\u306b\u30c7\u30b3\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u3089\u306eDLL\u306e\u540d\u524d\u306f\u305d\u308c\u305e\u308cimg2data.dll\u3068CreateShortct.dll\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002CreateShortct.dll\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u73fe\u5728\u306e\u30e6\u30fc\u30b6\u30fc\u306eStartup\u30d5\u30a9\u30eb\u30c0\u30fc\u3092\u898b\u3064\u3051\u3001\u5143\u306e\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30b7\u30e7\u30fc\u30c8\u30ab\u30c3\u30c8\u3092\u3001\u30e9\u30f3\u30c0\u30e0\u306a8\u6587\u5b57\u306e\u540d\u524d\u4f7f\u3063\u3066\u4f5c\u6210\u3059\u308b\u306e\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u4e00\u65b9\u3001img2data.dll\u306e\u65b9\u306f\u3082\u3046\u5c11\u3057\u8208\u5473\u6df1\u3044\u3082\u306e\u306a\u306e\u3067\u30c7\u30fc\u30bf\u96a0\u3057\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002<\/p>\n<p>CreateShortct.dll\u306b\u306f\u4ee5\u4e0b\u306ePDB\u6587\u5b57\u5217\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u306e\u6587\u5b57\u5217\u304c\u3053\u306e\u30de\u30eb\u30a6\u30a7\u30a2\u306e\u547d\u540d\u306b\u4f7f\u308f\u308c\u307e\u3057\u305f\u3002<\/p>\n<div align=\"center\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-04.png\" \/><\/div>\n<h3>\u30c7\u30fc\u30bf\u96a0\u3057<\/h3>\n<p>img2data.dll\u30d5\u30a1\u30a4\u30eb\u306b\u306f\u3001.NET Framework\u5185\u306b\u3042\u308b\u591a\u6570\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u5229\u7528\u3057\u3066\u753b\u50cf\u3092\u30c7\u30fc\u30bf \u30b9\u30c8\u30ea\u30fc\u30e0\u306b\u5909\u63db\u3059\u308b\u5c02\u7528\u95a2\u6570\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306e\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<div align=\"center\">\n<figure style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-05.png\" alt=\"\u56f34 ImagesToData\u95a2\u6570\" width=\"900\" height=\"386\" \/><figcaption class=\"wp-caption-text\">\u56f34 ImagesToData\u95a2\u6570<\/figcaption><\/figure>\n<\/div>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u88c5\u306f<a href=\"https:\/\/github.com\/pan-unit42\/public_tools\/blob\/master\/stegbaus\/Program.cs\" target=\"_blank\" rel=\"noopener noreferrer\" data-page-track=\"true\" data-page-track-value=\"company:unit42-stegbaus-because-sometimes-xor-just-isnt-enough: section:\u30c7\u30fc\u30bf\u96a0\u3057\">\u3053\u3053<\/a>\u306b\u3042\u308a\u307e\u3059\u306e\u3067\u3001System.Drawing\u3078\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u53c2\u7167\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067Visual Studio\u3067C#\u3068\u3057\u3066\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u63d0\u4f9b\u6e08\u307f\u306e\u30c7\u30b3\u30fc\u30c0\u306f\u3001\u5143\u306e\u540d\u524d\u3068\u3068\u3082\u306bPNG\u30ea\u30bd\u30fc\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u3059\u3079\u3066\u542b\u3080\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u540d\u524d\u3092\u53d7\u3051\u53d6\u308a\u3001\u30d0\u30a4\u30ca\u30ea \u30d5\u30a1\u30a4\u30eb\u3092\u51fa\u529b\u3057\u307e\u3059\u3002\u3053\u306e\u51fa\u529b\u30d5\u30a1\u30a4\u30eb\u306f\u5206\u6790\u3092\u7d99\u7d9a\u3059\u308b\u306e\u306b\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>img2data.dll\u306fA.dll\u5185\u306eConvertImagesToData\u95a2\u6570\u304c\u5229\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001.NET\u30e2\u30b8\u30e5\u30fc\u30eb \u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\u624b\u6cd5\u3092\u4f7f\u3063\u3066\u5358\u7d14\u306bDLL\u3092\u30e1\u30e2\u30ea\u306b\u30ed\u30fc\u30c9\u3057\u3001\u30c7\u30fc\u30bf \u30b9\u30c8\u30ec\u30fc\u30b8\u7528\u306b\u30d0\u30c3\u30d5\u30a1\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u57fa\u672c\u7684\u306b\u3001img2data.dll\u306f\u5143\u306e\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u5185\u306e\u30ea\u30bd\u30fc\u30b9\u3092\u898b\u3064\u3051\u3001\u3059\u3079\u3066\u306eraw\u30d0\u30a4\u30c8\u3092\u3001\u64cd\u4f5c\u3055\u308c\u308b\u524d\u306b\u30e1\u30e2\u30ea \u30b9\u30c8\u30ea\u30fc\u30e0\u306b\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u306f\u3001\u5229\u7528\u53ef\u80fd\u306a\u30c7\u30fc\u30bf \u30b9\u30c8\u30ea\u30fc\u30e0\u306b\u5909\u63db\u3055\u308c\u3001\u30b0\u30ed\u30fc\u30d0\u30eb \u30d0\u30c3\u30d5\u30a1\u306b\u4fdd\u5b58\u3055\u308c\u308b\u3068\u3001\u6b21\u306b\u5fa9\u53f7\u5316\u51e6\u7406\u3092\u8907\u6570\u56de\u65bd\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u3053\u306e\u5f8c\u3067\u8003\u5bdf\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6697\u53f7\u5316<\/h3>\n<p>\u30b9\u30c6\u30ac\u30ce\u30b0\u30e9\u30d5\u30a3\u30fc\u306b\u3088\u308b\u30c7\u30fc\u30bf\u96a0\u3057\u306f\u6975\u3081\u3066\u6709\u52b9\u306a\u60c5\u5831\u96a0\u307a\u3044\u624b\u6bb5\u3067\u3059\u304c\u3001\u30de\u30eb\u30a6\u30a7\u30a2\u306e\u4f5c\u6210\u8005\u306fAES\u6697\u53f7\u5316\u306e\u5229\u7528\u3082\u5fc5\u8981\u3067\u3042\u308b\u3053\u3068\u306b\u6c17\u304c\u4ed8\u304d\u307e\u3057\u305f\u3002\u5177\u4f53\u7684\u306b\u306f\u3001System.Security.Cryptography\u306b\u5c5e\u3057\u3066\u3044\u308bRinjndaelManaged\u95a2\u6570\u304c\u3001AES-128\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u5fa9\u53f7\u5316\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u30de\u30eb\u30a6\u30a7\u30a2\u3092\u30c7\u30d0\u30c3\u30b0\u3057\u3001crypto\u30eb\u30fc\u30c1\u30f3\u30921\u30b9\u30c6\u30c3\u30d7\u305a\u3064\u8aad\u307f\u9032\u3081\u3066\u3044\u308b\u4e2d\u3067\u3001\u79c1\u305f\u3061\u306f\u6700\u521d\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5bb9\u6613\u306b\u7a81\u304d\u6b62\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u3001AES\u30eb\u30fc\u30c1\u30f3\u7528\u306e\u30ad\u30fc\u304a\u3088\u3073\u521d\u671f\u5316\u30d9\u30af\u30c8\u30eb(IV)\u3092\u4f5c\u6210\u3059\u308b\u306e\u306b\u4f7f\u308f\u308c\u307e\u3059\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\u3001\u5143\u306e\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u306eSTARTUP_INFORMATION\u69cb\u9020\u4f53\u304b\u3089\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3092\u7279\u5b9a\u3057\u3066\u307e\u3068\u3081\u305f\u3082\u306e\u3067\u3059\u3002\u305d\u3057\u3066\u3001\u6b21\u306b\u3053\u306e\u5024\u306b\u4e00\u9023\u306e\u7b97\u8853\u6f14\u7b97\u51e6\u7406\u304c\u65bd\u3055\u308c\u307e\u3059\u3002\u3059\u308b\u3068\u3001\u3053\u306e\u60c5\u5831\u304c\u65b0\u3057\u3044GUID\u3092\u4f5c\u6210\u3059\u308b\u306e\u306b\u4f7f\u308f\u308c\u307e\u3059\u304c\u3001\u4eca\u5ea6\u306f\u3053\u306eGUID\u304c8\u6587\u5b57\u306b\u5207\u308a\u8a70\u3081\u3089\u308c\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u3068\u3057\u3066\u4f7f\u308f\u308c\u307e\u3059\u3002\u5206\u6790\u5bfe\u8c61\u306e\u30b5\u30f3\u30d7\u30eb\u7528\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u306f\"d1ee1095\"\u3067\u3059\u304c\u3001\u3053\u308c\u306f\u30c7\u30d0\u30c3\u30b0\u3068\u5b9f\u884c\u306e\u6700\u4e2d\u306b\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u5bb9\u6613\u306b\u3067\u304d\u307e\u3059\u3002\u6b21\u306b\u3001\u3053\u306e\u5024\u304cPassword-Based Key Derivation Function 2 (PBKDF2)\u3092\u4ecb\u3057\u3066\u51e6\u7406\u3055\u308c\u307e\u3059\u306e\u3067\u3001\u305d\u306e\u51e6\u7406\u7d50\u679c\u3092\u300132\u30d0\u30a4\u30c8\u5024\u306816\u30d0\u30a4\u30c8\u5024\u306e\u4e21\u65b9\u306b\u95a2\u3057\u3066\u300116\u9032\u30a8\u30f3\u30b3\u30fc\u30c9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u300232\u30d0\u30a4\u30c8\u5024\u7528\u306e\u623b\u308a\u5024\u304c\u30ad\u30fc\u3067\u300116\u30d0\u30a4\u30c8\u5024\u7528\u306e\u623b\u308a\u5024\u304cIV\u3067\u3059\u3002<\/p>\n<p>\u30ad\u30fc\u3068IV\u304c\u751f\u6210\u3055\u308c\u308b\u3068\u3001CBC\u30e2\u30fc\u30c9\u306eAES\u3092\u4f7f\u3063\u3066\u5fa9\u53f7\u5316\u51e6\u7406\u304c\u9032\u884c\u3057\u307e\u3059\u3002\u30d1\u30b9\u30ef\u30fc\u30c9\u304c\u5224\u660e\u3059\u308c\u3070\u3001\u4ee5\u4e0b\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u306e\u5fa9\u53f7\u5316\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-06.png\" \/><\/div>\n<p>\u30c7\u30fc\u30bf\u306e\u5fa9\u53f7\u5316\u304c\u7d42\u308f\u3063\u3066\u307f\u308b\u3068\u3001\u7d50\u679c\u306f\u4e88\u60f3\u5916\u306e\u3082\u306e\u3067\u3057\u305f\u3002\u4eba\u9593\u304c\u8aad\u3081\u308b\u30c7\u30fc\u30bf\u304c\u5168\u304f\u306a\u3044\u306e\u3067\u3059\u3002\u305d\u3053\u3067\u3001\u3055\u3089\u306b\u30c7\u30d0\u30c3\u30b0\u4f5c\u696d\u3092\u9032\u3081\u3001\u4f7f\u308f\u308c\u3066\u3044\u308b\u5225\u306e\u624b\u6cd5\u304c\u4f55\u304b\u306a\u3044\u304b\u7a81\u304d\u6b62\u3081\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u306e\u5834\u5408\u3001\u4f5c\u6210\u8005\u306f\u30b9\u30c6\u30ac\u30ce\u30b0\u30e9\u30d5\u30a3\u30fc\u3068AES\u6697\u53f7\u5316\u3092\u4f7f\u3046\u3060\u3051\u3067\u306f\u4e0d\u5341\u5206\u3067\u3001\u540c\u3058AES\u5b9f\u88c5\u3092\u4f7f\u3063\u3066\u30c7\u30fc\u30bf\u306e\u6697\u53f7\u5316\u30922\u56de\u884c\u308f\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3001\u3068\u5224\u65ad\u3057\u307e\u3057\u305f\u3002\u4e0a\u8a18\u3068\u540c\u3058\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u304a\u3088\u3073\u65e2\u306b\u623b\u3063\u3066\u304d\u305f\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u306e10\u9032\u8868\u73fe\"1484648550\"\u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u79c1\u305f\u3061\u306f\u5fa9\u53f7\u5316\u306e2\u56de\u76ee\u306e\u7e70\u308a\u8fd4\u3057\u306b\u4f7f\u3046\u30ad\u30fc\u3068IV\u3092\u7a81\u304d\u6b62\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4eca\u5ea6\u306f\u3001\u4eba\u9593\u304c\u8aad\u3080\u3053\u3068\u306e\u3067\u304d\u308b\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u3089\u3057\u304d\u3082\u306e\u304c\u5f97\u3089\u308c\u307e\u3057\u305f\u3002\u305d\u308c\u306b\u306f\u4ee5\u4e0b\u306e\u30c7\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li>Emulation (\u30a8\u30df\u30e5\u30ec\u30fc\u30b7\u30e7\u30f3)<\/li>\n<li>Install (\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb)<\/li>\n<li>Notify (\u901a\u77e5)<\/li>\n<li>Options.Compress<\/li>\n<li>Options.CheckVM<\/li>\n<li>Options.CheckSandbox<\/li>\n<li>Options.DelayTime<\/li>\n<li>Options.MonitorPackage<\/li>\n<li>Options.MonitorRegistry<\/li>\n<li>Options.MonitorSelf<\/li>\n<li>Options.HostIndex<\/li>\n<li>Options.UACBypass<\/li>\n<li>Files.Main<\/li>\n<li>Files.Count<\/li>\n<\/ul>\n<div align=\"center\"><img  class=\"aligncenter lozad\"  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-07.png\" \/><\/div>\n<p>\u6700\u7d42\u7684\u306b\u3001\u524d\u8ff0\u306e\u5fa9\u53f7\u5316\u304c\u7d42\u308f\u308b\u3068\u3001StegBaus\u8a2d\u5b9a\u30aa\u30d7\u30b7\u30e7\u30f3\u304c\u4e0b\u56f3\u306e\u3088\u3046\u306b\u8aad\u3081\u308b\u5f62\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u3001\u3069\u306e\u8ffd\u52a0\u306e\u95a2\u6570\u304cA.dll\u5185\u3067\u547c\u3070\u308c\u308b\u3053\u3068\u306b\u306a\u308b\u304b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u65e2\u306b\u793a\u3057\u305f\u3088\u3046\u306b\u3001\u8ffd\u52a0\u306e\u95a2\u6570\u304c\u591a\u6570\u3042\u308a\u307e\u3059\u304c\u3001\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u6709\u52b9\u306b\u3059\u308b\u8a2d\u5b9a\u304c\u3055\u308c\u308b\u307e\u3067\u4f7f\u308f\u308c\u307e\u305b\u3093\u3002\u3053\u306e\u8a2d\u5b9a\u30aa\u30d7\u30b7\u30e7\u30f3\u306b\u52a0\u3048\u3001\u5fa9\u53f7\u5316\u6e08\u307f\u30c7\u30fc\u30bf\u3082\u6700\u7d42\u30da\u30fc\u30ed\u30fc\u30c9\u304c\u542b\u3093\u3067\u304a\u308a\u3001\u5206\u6790\u5bfe\u8c61\u306e\u8907\u6570\u306e\u30b5\u30f3\u30d7\u30eb\u5185\u306b\u30012\u3064\u306e\u7570\u306a\u308b\u5f62\u5f0f\u3067\u8868\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<div align=\"center\">\n<figure style=\"width: 900px\" class=\"wp-caption aligncenter\"><img  data-src=\"https:\/\/www.paloaltonetworks.jp\/content\/dam\/pan\/ja_JP\/Images\/blog\/2017\/80799\/steg-baus-because-sometimes-xor-is-not-enough-08.png\" alt=\"\u56f35 \u5fa9\u53f7\u5316\u6e08\u307f\u306e\u30c7\u30fc\u30bf\u5f62\u5f0f(\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u5bfezlib)\" width=\"900\" height=\"479\" \/><figcaption class=\"wp-caption-text\">\u56f35 \u5fa9\u53f7\u5316\u6e08\u307f\u306e\u30c7\u30fc\u30bf\u5f62\u5f0f(\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u5bfezlib)<\/figcaption><\/figure>\n<\/div>\n<p>\u4e0a\u306e\u56f3\u3067\u5206\u304b\u308b\u3068\u304a\u308a\u3001\u5fa9\u53f7\u5316\u6e08\u307f\u306e\u30c7\u30fc\u30bf \u30d0\u30c3\u30d5\u30a1\u306e\u4e2d\u306b\u3042\u308b2\u3064\u306e\u7570\u306a\u308b\u30c7\u30fc\u30bf\u8868\u73fe\u3068\u306f\u3001\u30d7\u30ec\u30fc\u30f3\u30c6\u30ad\u30b9\u30c8\u304a\u3088\u3073zlib\u306b\u3088\u308b\u5727\u7e2e\u6e08\u307f\u30c7\u30fc\u30bfblob\u3067\u3059\u3002\u7279\u5b9a\u3055\u308c\u305f\u6700\u521d\u306e\u30b5\u30f3\u30d7\u30eb\u306e\u4e00\u90e8\u3067\u306f\u3001\u4e0a\u8ff0\u306e\u5fa9\u53f7\u5316\u306e\u6bb5\u968e\u304c\u5b9f\u969b\u306b\u306f\u30c7\u30fc\u30bf\u96a0\u3057\u306e\u6700\u7d42\u6bb5\u968e\u3067\u3042\u308a\u3001\u3053\u306e\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u306f\u305d\u306e\u6bb5\u968e\u3067RunPE\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30e1\u30e2\u30ea\u306b\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002\u5206\u6790\u5bfe\u8c61\u306e\u6700\u65b0\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001zlib\u306b\u3088\u308b\u5727\u7e2e\u3092\u5229\u7528\u3057\u3066\u3001\u5fa9\u53f7\u5316\u6e08\u307f\u30c7\u30fc\u30bf \u30d0\u30c3\u30d5\u30a1\u5185\u306b\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u3092\u3053\u308c\u307e\u3067\u3088\u308a\u3082\u3044\u3063\u305d\u3046\u898b\u3064\u3051\u306b\u304f\u304f\u3057\u307e\u3059\u3002\u89e3\u51cd\u51e6\u7406\u306fDecompress\u95a2\u6570\u5185\u3067\u5b8c\u7d50\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u306f\u56f32\u306e\u4e2d\u306bA.dll\u306e\u4e00\u90e8\u3068\u3057\u3066\u793a\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u6700\u7d42\u30da\u30a4\u30ed\u30fc\u30c9\u306f\u3001\u89e3\u51cd\u3055\u308c\u308b\u3068\u65b0\u3057\u3044\u30d7\u30ed\u30bb\u30b9\u3068\u3057\u3066\u3001\u3084\u306f\u308aRunPE\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u3063\u3066\u30e1\u30e2\u30ea\u306b\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u7279\u5b9a\u3055\u308c\u305fStegBaus\u30ed\u30fc\u30c0\u30fc\u306b\u306f\u9ad8\u5ea6\u5316\u3057\u305f\u30c7\u30fc\u30bf\u96a0\u3057\u306e\u624b\u6cd5\u304c\u591a\u6570\u542b\u307e\u308c\u3066\u304a\u308a\u3001\u3053\u306e\u30ed\u30fc\u30c0\u30fc\u306f\u5546\u54c1\u3068\u3057\u3066\u6d41\u901a\u3057\u3066\u3044\u308b\u69d8\u3005\u306a\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u3092\u591a\u6570\u914d\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u73fe\u6642\u70b9\u3067\u3001WildFire\u306b\u3088\u308a\u3053\u306e\u30ed\u30fc\u30c0\u30fc\u305d\u308c\u81ea\u4f53\u304c\u30de\u30eb\u30a6\u30a7\u30a2\u3068\u3057\u3066\u8b58\u5225\u3055\u308c\u3066\u3044\u307e\u3059\u306e\u3067\u3001Autofocus\u3067\u3082\u898b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Palo Alto Networks\u306f\u3053\u306e\u60aa\u610f\u306e\u3042\u308b\u30ed\u30fc\u30c0\u30fc\u3092\u6319\u52d5\u8b58\u5225\u5b50\u306b\u3088\u308a\u691c\u51fa\u3057\u3066\u304a\u308a\u3001\u3053\u3046\u3057\u305f\u624b\u6bb5\u3067\u914d\u4fe1\u3055\u308c\u3066\u3044\u308b\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u306e\u8b58\u5225\u3082\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u7279\u7570\u306a\u30de\u30eb\u30a6\u30a7\u30a2 \u30d5\u30a1\u30df\u30ea\u306b\u3064\u3044\u3066\u3054\u6559\u793a\u3044\u305f\u3060\u3044\u305f\u8105\u5a01\u30a2\u30ca\u30ea\u30b9\u30c8\u306eBrandon Levene\u6c0f\u306b\u611f\u8b1d\u3044\u305f\u3057\u307e\u3059\u3002\u5206\u6790\u6e08\u307f\u30b5\u30f3\u30d7\u30eb\u5185\u3067\u7279\u5b9a\u3055\u308c\u305f\u7279\u5fb4\u304b\u3089\u3001StegBaus\u30ed\u30fc\u30c0\u30fc\u3092\u5229\u7528\u3057\u3066\u3044\u308b250\u500b\u4ee5\u4e0a\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u767a\u898b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u3053\u308c\u3089\u306f\u3059\u3079\u3066\u3001WildFire\u3067\u30de\u30eb\u30a6\u30a7\u30a2\u3068\u3057\u3066\u8b58\u5225\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n<h3>\u53c2\u8003\u60c5\u5831<\/h3>\n<h4><b>SHA256\u30cf\u30c3\u30b7\u30e5<\/b><\/h4>\n<p style=\"padding-left: 40px;\">1678e719a18eabf552cd54f763f401959fccb47fa3ef035c1f5b49c440dc0ddd<br \/>\n4233a707e1772c6399776dd563dfb315b59cd2bd685bc78802958065a871817a<br \/>\n440e31eac26692e8cdfc357f2b66fb371a4d3601961cae3082a2d3f3855d4a0c<br \/>\n2f43238efb23e00c8413cc4c203bfd29b17e846dedd613c86d9edc8b20dc2600<br \/>\na5a8addaec02c0a7849adbf6125e6d41315b3c6e40deb31ec605aa083f5dcd56<br \/>\nf70bf0d2f14da3f677986c90b68c576aa5f9bd543a585b8b3072524ae0560272<br \/>\n5a56042607f463ff286a16537c6ae8ffe78d3c2258674dc095d4818ce9552198<br \/>\nc33b2d07872354cc87206b886143bb3e250fc49a260a67276564b258cb67c290<br \/>\nb97c36f7d7118ab964ac7e7337dd3de0ab86cb286e724f3787b358aef5f2a5f1<br \/>\n4dc9edcce2e78405c9301057a39b6a5e7fdca60b6f11b35e4467312d459dce14<br \/>\n658d455f574cbf59c4398fdaf68a9d93a250e85812ed7557b9a5d589440d11b5<br \/>\n8ef803d8e1f2d6221bc1d562b6ee6b1f6886baa0a46a0758677f423eaf4b4e72<br \/>\nf482c2201e13573e6dc93cab302683f7e8fa677673a14ba9f0cc7199feb94b85<br \/>\n773a8cd7becf55e4a8fb56896253d1408def916a405252439fb5e4d541b5bffb<br \/>\na2e36d4102b6be41cbeb16a8627b913f19c0cabb9c828359ecb41d50122a6df2<br \/>\n64aafb17ca136e56678c7321313894fa0b2331d42b16054be5a3d57c8fd3a312<br \/>\n6b0edf8e9dce9f137aa92fc7cd25f8148c1efcd0a418dc35035d025510b18cba<br \/>\n9cd0af91e0cbe55db3b2a444941378802879a78db6484d4449ceca1f3b6862c5<br \/>\n10888258eb6136ae1cc7ad6e3dd9ec8ada384365c71932c15273e0027577bdc4<br \/>\na9dc85927b32af2a40cbce1866a76cd67d7b329fc775ad09bfbe5cb6ea463c65<br \/>\n2b631fa0cfabfb9d96460ac800219b324c69a7f7e54f84ec37a378e0bad54992<br \/>\ne43b1e25e4a4d19babed4b25a9a2547efb6843eb128d5e50ef80a871a8a7ed0d<br \/>\nd43814e12d945f21076748ff1695dbb977854db2ff0b44b32c59dd1ecbb120e0<br \/>\n4be05fd94f7c7f42a2f711184d1b67eaebbdbb3c77b9ff626c1f41c39cf0974f<br \/>\n7f1ba131992a21c1c9e7c300fe4a0e58b1554f27ab8b9a804f802c9f92ab411d<br \/>\n950078b915e0ab5c9238d0ecaf6b0b6392ae8c74f8a731a3bfc02015ecbf06df<br \/>\ndff0de34c5579339210709bd0f1ed9050a67d14233f7098ad76e302fabb047f2<br \/>\na0ed357c96b0f17a3f45bd9926c381dab2d86bbb0dc7915f4294d24fbbd90694<br \/>\n0f5c982ba2789fc5dc45f1bcc8b97a8338026e8e6a4a897c7a9598f7c822198f<br \/>\ncd193bf66b4a0859524e3c87cbd677986270916fd520de6a90776e375f22def8<br \/>\n3fa229f1a014f04975f6f25aa81a657daeb583e22bd7a5ace47d63ec392cc7f4<br \/>\n269e74ef268dd0c5537b7154538bfba3cc23b3e0a8338a920f44f3f16d5e141d<br \/>\n04ca2140616cb9ff7d417ddc1924f2812d03b0b67dc197cd26d0b69981c9f55e<br \/>\ne8aedfd0addbb2ba395c23f39a17b962e5861dd1df020e8f134a19042ef38552<br \/>\n3ef998f62f696bc1677f78f3a356d95f9c56ca71e58759c5830c3c6f64e0f1ef<br \/>\n67ad00d6ca060b6c6ad7263b32aa105bceac3c3bd78db45021b8df6d10e0c996<br \/>\n0a9ecc4953983197d0369ae6ee383c4da3ed26a1b557ae0214b3d834a219083f<br \/>\n669e80679707bd00bf48994cf9d4fee5b58f6b87534cf7da5aefe71c0bee3d34<br \/>\n72c8b6c8219d7ae1b99165428c77855e8e4001d2217e369f156192e8c0afc276<br \/>\nee4704cbe11ff52e6a4e33100dce375e0098d09919402246390706d0b4e4a19a<br \/>\n17530ed17699da87a3f4e64af69a78bfa525d80b1c1e5b0c61b48282c231b32e<br \/>\n7a457ced31004aeccbbdc169b66a02a55a38bd1934c0ed54d97a69980945f487<br \/>\n2c821b1aadd0b0606a480d66790700bf77229aeb9a540fdc989667a61c38be05<br \/>\n97ac4c6f670374b849fdbdf43a2f1cbd1807fc0b419073e757c0ec429da51182<br \/>\nb6ddcd352d4345186b9537f12cc82c9aa85697e681858c8b686b18c3b9f66b56<br \/>\nc4c5fdc968d350ad7646a988e768bf275a2484296042590378288e5b955942be<br \/>\n380a1a709b01c3f3b7f0198e9a06faa6918c6d14dc52f7f75a5384f71ade30a6<br \/>\n920287016bf31fab721b67c4be8c181655701f56a6f54c0e52dcba58b5922f50<br \/>\n17fb1bdebf607fd0db97785f4c5fecf6625d528cbae5f0535dd575294ec63a15<br \/>\n67597bc132585a083f946a8853004a5cca9a215f15122b2969f0e3f27af06974<br \/>\nb782000fbb86bd69a8f67d4fe58526e1e2cb0ac6f92ecb52ca3ff8ad754eadc3<br \/>\n784e60507721c12f9d7cb20edd8d874a5ac29cbb6eec33629b16e49e0a564f51<br \/>\n2d11f5fafb07a3e1b311572c4ccce87a4a6615d8912929857d8ac07a632e1719<br \/>\n6d2c31e412f07246975eab4a15a8ad7829966efc8f638b25c64e504accaa7b93<br \/>\ndb81b258a9eff00a892a8cec7409983d84ea04baa0fdc1fe9589ebf3f8636704<br \/>\nf9c54e8dffff277aea04447cfaf18e0255c27b4e5fc9606389c133795379f52c<br \/>\n20f83cdd0f35ff5d0d39241893370801a8206eb22cb85f34e3749ae8edaf778a<br \/>\n6f51b8555fb5f959dcbac46aca02106f1affdacba29988682b69eb5a6c9ce973<br \/>\nb6d06b8d03dbafbabf59b2b96b6d66fd0f754034770e80c9aee312a7270b30c3<br \/>\n241180a7c31bfeaec07210e348cbf860c87adc2340c6bd25cf41f82fbd6cd994<br \/>\n0da8134694f67efcf5ca82d638f48734b09a53d52b791abfcae29521989ecc28<br \/>\nd8890b413e9708ac7fce71f076cac0c96302d3af27edea66c36ea072bf14e1a2<br \/>\n23c0d83e04199229a0b0f98d1767cce992a9aa847f957d8d0a5bb045f92315d2<br \/>\nb789a5df1f5ebe997870323ad3802f691c83e19bc8a22bca82edccce17f5b57c<br \/>\n62f23d89d1876eef9d109392b4637450a2f87b7ccb02d7433a1dbcd4c1edf946<br \/>\ndc5d64bf089add373a24abc24a9185d93cf29edee7907ba3460712945b4d28dd<br \/>\n55ca978a8831c4a483c4dc88637edac5dfe050ebbd6f2e0d5e8c16669dc60a2b<br \/>\nc805f6fcc78ebcbb3170580626ea8616f4e06b9d4936e2fb6aae79a4410f1e0d<br \/>\n18bf92b767562e63326cf142481bc0c33a8650c80f20d611feb7a3de82de51a4<br \/>\n8c91edcc3541869bab5a2466fa0a8c075f9acac3badc8534c221a019ffe3ad7a<br \/>\naae8a273f9bae5bf187ce9b3ba3ad945386bb38286ebcba38b7ccc1e8ad00c18<br \/>\n4f8d5b7c4e5cd429b1a27bf8b8c67ca6b7dcecf728b9362836633b5f46ecbf22<br \/>\n675e79744c4fffded353b45271638cc5cedeeb745597547f5ea029d14909772c<br \/>\neae0fc7c52b8b5d9919129fdeeb5f59908d41873583a8f4169dfdb156afac5e6<br \/>\n59a46a335f8750210eada0aca256fab1d5cbec5c5f8563acdae58ba04ed4e0ce<br \/>\n639b095a360b75903d6fe72a0bb20efc0f15ed8ddafa92bcf16c3520f53990b9<br \/>\nb9c54dc17605268687f4ed80d2e52d888754d6d28dcaf62e6702b1711e5323ba<br \/>\n65e3121018d6bd04e28dd56e4dae9b11537a47368288ba8dd049be7642dd5460<br \/>\n009d1be4c0a33202ba87e12ac83f584560f19c7bbc1eccfe5a16636055f896b9<br \/>\n7a87a72e31e05662bbe20f3c38e4dec0ec798cd474564f1889240be80c970038<br 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