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[分享]一篇贴子中的JS脚本混淆
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2021-2-9 10:23
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起因
昨天无意中看到了论坛内的一篇帖子https://bbs.pediy.com/thread-260318.htm，当然看过的小伙伴不要指望我完成他未竟的事业，毕竟我对这安卓破解不是太在行而且我的老司机APP每日观看最大次数验证也是过不了，哈哈。
目的
那这篇贴子主要目的是因为他在文中提到了一个JS脚本的混淆，我想试着解一下他这个混淆，第二就是分享一个我之前用python写的一个解js混淆的脚本（只有两种格式的JS混淆，算是抛砖引玉了）
过程
原文中的混淆是这样的
一开始的时候我也是蒙的，不管他了索性不如先手动排一下版吧，也许就能发现什么
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | eval(function (p,a,c,k,e,r) { e=function(c){ return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36)) }; if(!''.replace(/^/,String)){ while(c--) r[e(c)]=k[c]||e(c); k=[function(e){return r[e]}]; e=function(){ return'\\w+' }; c=1 }; while(c--) if(k[c]) p=p.replace(new RegExp('\\b'+e(c)+'\\b','g'),k[c]); return p} |
当我们把这个貌似解密函数排出来之后，发现其有六个参数，之后会发现紧跟着这个函数的就是它的参数。既然解密函数和参数都有了，那就简单了，打开浏览器（这里以windows自带的Edge为例），按下F12进入控制台，随后复制解密函数及其参数，然后再点击运行就能够得到我们想要的结果了。
需要注意的就是加上函数名，别把eval也复制进去，最后再return p 之前打印这个p就是解密之后的脚本。
结果
最后把红色的结果复制下来就行了，然后可以用NotePad++的JSTool插件中的JSFormat进行自动排版即可
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 | jQuery(document).ready(function ($) { var g = false; var h = "null"; h = UrlParm.parm("auth"); if (!h || h == 'null') { weui.alert('请前往官网https://SKRMAN.APP更新最新版本') } var l; var m; var n = 0; var o = []; var p = 1; var q = "null"; var r; var s; var t = false; var u = false; var v = true; var w = true; var x = window.location.host; if (x.indexOf('skrman.app') > -1 || x.indexOf('SKRMAN.APP') > -1) { v = true } else { v = false } $("#card-step-1").show(); $("#card-step-2").hide(); $("#promode-time-offset").hide(); $("#promode-time-button").hide(); $("#promode-copy-button").hide(); $("#promode-channel-select").hide(); let userAgent = navigator.userAgent; if (userAgent.indexOf('AppleWebKit') > -1 || userAgent.indexOf('iPhone') > -1 || userAgent.indexOf('iPad') > -1) { g = true; if (userAgent.indexOf('iPhone OS 4_3_3') > -1 || userAgent.indexOf('SKRAND') > -1 || userAgent.indexOf('iPhone OS 7_0_1') > -1 || userAgent.indexOf('IOS14') > -1) { g = false } } $('#timeInput').val(getNowFormatDateTime()); var y = setInterval(function () { timeTask() }, 50); $("#professional-button").click(function () { if (!u) { u = true; $("#professional-button").css('color', 'red'); weui.alert("已开启专业模式"); $("#promode-time-offset").show(); $("#basemode-time-offset").hide(); $("#promode-copy-button").show(); $("#promode-time-button").show(); $("#promode-channel-select").show() } else { u = false; $("#professional-button").css('color', 'black'); weui.alert("已关闭专业模式"); $("#promode-time-offset").hide(); $("#basemode-time-offset").show(); $("#promode-copy-button").hide(); $("#promode-time-button").hide(); $("#promode-channel-select").hide() } }); function timeTask() { if (t) { let now = new Date(); let timeDiff = r.getTime() - now.getTime(); if (timeDiff <= s) { t = false; startJump(); $("#time-count").html("开启跳转") } else { $("#time-count").html("倒计时:" + timeDiff + "ms") } } } function queryItem(b) { if (w) { w = false } else { return } n = 0; o = []; p = 1; t = false; var c = 'https://bmobapi.hb174.top/aed0843961fb06dc/tmallBP?auth=' + h + '&mlink=' + b; if (v) { c = 'https://cloud.bmob.cn/aed0843961fb06dc/tmallBP?auth=' + h + '&mlink=' + b } $.ajax({ type: "GET", timeout: 5000, dataType: 'jsonp', jsonp: "callback", jsonpCallback: 'jsonp', url: c, success: function (a) { w = true; if (a.errcode == 0) { l = a.data; reflashControlPad(); $("#card-step-1").hide(); $("#card-step-2").show(); $("#configPad").show(); $("#readyPad").hide() } else { if (a.errmsg.indexOf('解析失败') > -1) { queryItem2(b); w = true } else { weui.alert(a.errmsg) } } }, error: (err, type) => { queryItem2(b); w = true }, }) } function queryItem2(a) { n = 0; o = []; p = 1; t = false; if (a.indexOf('.tb.cn') > -1) { geiItemId(a) } if (a.indexOf('id=') > -1) { var b = a.split("id=")[1]; getTmallItemStyle(b) } } function geiItemId(d) { dsBridge.call("networkGet", { url: d }, function (a) { if (a.indexOf('errorjhandler') == 0) { weui.alert("错误" + a); return } let body = a; var b = "null"; if (body.indexOf('&id=') > -1) { var c = body.split("&id=")[1]; b = c.split("&")[0] } else if (body.indexOf('taobao.com/i') > -1) { var c = body.split("taobao.com/i")[1]; b = c.split(".htm")[0] } else if (body.indexOf('tmall.com/i') > -1) { var c = body.split("tmall.com/i")[1]; b = c.split(".htm")[0] } if (b != 'null') { getTmallItemStyle(b) } else { weui.alert("无法解析该淘口令") } }) } function getTmallItemStyle(b) { let current_token = "654a3a20023319a6dc4c755b151f082b"; let callbackString = "mtopjsonp"; let now = new Date(); let timeStramp = now.getTime() + ""; var c = { "id": b, "itemNumId": b, "itemId": b, "exParams": { "id": b }, "detail_v": "8.0.0", "utdid": "1" }; var d = JSON.stringify(c); d = encodeURIComponent(d); let preSignStr = current_token + "&" + timeStramp + "&12574478&" + d; let signStr = hex_md5(preSignStr); let linkString = "https://h5api.m.taobao.com/h5/mtop.taobao.detail.getdetail/6.0/?" + "jsv=2.5.7&appKey=12574478&t=" + timeStramp + "&sign=" + signStr + "&api=mtop.taobao.detail.getdetail&v=6.0&isSec=0&ecode=0&AntiFlood=true&AntiCreep=true&H5Request=true&ttid=2018@taobao_h5_9.9.9&type=jsonp&dataType=jsonp&" + "data=" + d; $.ajax({ type: "GET", timeout: 5000, dataType: 'jsonp', jsonp: "callback", jsonpCallback: callbackString, url: linkString, success: function (a) { try { let _result = { item: a.data.item, skuBase: a.data.skuBase }; l = _result; reflashControlPad(); $("#card-step-1").hide(); $("#card-step-2").show(); $("#configPad").show(); $("#readyPad").hide() } catch (e) { weui.alert("解析失败") } }, error: (err, type) => { weui.alert(err.statusText + "网络错误，换个网络试试") }, }) } function reflashControlPad() { $("#itemTitle").html(l.item.title); m = l.item.itemId + ""; var a = ''; var b; var c = ''; try { if (l.item.images[0].length > 0) { b = l.item.images[0]; if (b.indexOf("http") != 0) { b = "https:" + b } console.log(b) } } catch (e) {} try { for (var i = 0; i < l.skuBase.props.length; i++) { let current_props = l.skuBase.props[i]; let current_props_name = current_props.name; let current_props_pid = current_props.pid; var d = ''; d = " <div class='item' >\n" + " <div class='itemTitle' >" + current_props_name + "</div>\n" + " <select name='select' class='itemSelect' onchange=onChange_Row(" + current_props_pid + ",this.options[this.options.selectedIndex].value)>\n"; for (var j = 0; j < current_props.values.length; j++) { let current_props_value = current_props.values[j]; let current_props_vid = current_props_value.vid; var f = "null"; if (current_props_value.image) { f = "https:" + current_props_value.image } let isSelect = false; if (n == 0 && j == 0) { if (i == 0 && f != 'null') { b = f } c = c + current_props_name + ":" + current_props_value.name; let _mprops = { pid: current_props_pid, vid: current_props_vid }; o.push(_mprops) } if (n != 0) { for (var k = 0; k < o.length; k++) { if (o[k].pid == current_props_pid && o[k].vid == current_props_vid) { c = c + current_props_name + ":" + current_props_value.name; isSelect = true; if (i == 0 && f != 'null') { b = f } } } } if (isSelect) { d = d + " <option value=" + current_props_vid + " selected = 'selected'>" + current_props_value.name + "</option>" } else { d = d + " <option value=" + current_props_vid + ">" + current_props_value.name + "</option>" } } a = a + d + "</select></div>" } } catch (e) { c = '默认' } a = a + " <div class='item' >\n" + "<div class='itemTitle' >购买数量(谨慎输入)</div>\n" + "<input name='select' class='itemSelect' onchange=onChange_Count(this.value) value='" + p + "'>"; a = a + "</div>"; $("#itemStylePad").html(a); c = "[下单确认]" + c + ' 购买数量:' + p; $("#itemStyle").html(c); $("#itemPic").attr("src", b); findSkuId(); $("#tips-content").hide() } function findSkuId() { n = 0; try { for (var i = 0; i < l.skuBase.skus.length; i++) { let _propPath = l.skuBase.skus[i].propPath + ';'; var a = true; for (var j = 0; j < o.length; j++) { if (_propPath.indexOf(o[j].pid + ':') == -1 || _propPath.indexOf(o[j].vid + ';') == -1) { a = false } } if (a) { n = l.skuBase.skus[i].skuId } } if (n == 0) { weui.alert("获取skuid出错"); $("#itemStyle").html("获取数据错误") } } catch (e) { console.log("skuId" + "---" + n) } }; onChange_Row = function (a, b) { for (var i = 0; i < o.length; i++) { if (o[i].pid == a) { o[i].vid = b } } reflashControlPad() }; onChange_Count = function (a) { let _count = parseInt(a); if (_count > 0 && _count < 1000) { p = _count; console.log(p); reflashControlPad() } }; $("#query-button").click(function () { let _link = $("#link").val(); if (_link.indexOf('.tb.cn') > -1) { var a = _link.split("http")[1]; a = a.split("?")[0]; a = 'http' + a; queryItem(a) } else if (_link.indexOf('id=') > -1) { var a = _link.split("id=")[1]; a = 'id=' + a; queryItem(a) } else { weui.alert('确保口令内含有https://m.tb.cn') } }); $("#promode-time-button").click(function () { dsBridge.call("networkGet", { url: "http://api.m.taobao.com/rest/api3.do?api=mtop.common.getTimestamp" }, function (a) { try { let now = new Date(); let data = JSON.parse(a); let timestamp_tb = data.data.t; var b = timestamp_tb - now; var c = 60 - b; if (b > 0) { weui.alert('淘宝时间比本地晚了【' + b + 'ms】 , 时间偏移建议提前【' + c + '】（正负值已为您算好，数值仅供参考！实际视设备跳转速度自行调整！）') } else { weui.alert('淘宝时间比本地早了【' + (-b) + 'ms】 , 时间偏移建议设置【' + c + '】（正负值已为您算好，数值仅供参考！实际视设备跳转速度自行调整！）') } } catch (e) {} }) }); $("#reset-button").click(function () { t = false; $("#card-step-1").show(); $("#card-step-2").hide(); $("#tips-content").show() }); $("#config-button").click(function () { let ready_time_str = $("#timeInput").val(); r = new Date(ready_time_str); r.setSeconds(0); if (g) { r.setTime(r.getTime() - (1000 * 60 * 60 * 8)) } q = "taobao://h5.m.taobao.com/cart/order.html?itemId=" + m + "&_input_charset=utf-8&buyNow=true&v=0&skuId=" + n + "&quantity=" + p; if (u) { let _ready_time_offset = parseInt($("#time-offset-input").val()); s = _ready_time_offset; let buy_channel = $("#channel-select").val(); if (buy_channel == 'bybtqdyh') { var a = { "id": m, "umpChannel": "bybtqdyh", "u_channel": "bybtqdyh" }; var b = JSON.stringify(a); b = encodeURIComponent(b); q = 'taobao://h5.m.taobao.com/cart/order.html?skuId=' + n + '&quantity=' + p + '&itemId=' + m + '&buyNow=true&exParams=' + b } } else { s = $("#time-offset-select").val() } let now = new Date(); let timeDiff = r.getTime() - now.getTime(); if (timeDiff <= s) { weui.alert("哎呀，开始时间不能比现在早"); return } $("#configPad").hide(); $("#readyPad").show(); $("#time-confirm").html("[" + r.toLocaleString() + "(-" + s + "ms)] 自动下单"); t = true }); $("#buy-button").click(function () { startJump() }); $("#promode-copy-button").click(function () { q = "taobao://h5.m.taobao.com/cart/order.html?itemId=" + m + "&_input_charset=utf-8&buyNow=true&v=0&skuId=" + n + "&quantity=" + p; copyTxt(q.replace("taobao:", "https:")) }); function startJump() { window.location.href = q } function copyTxt(a) { if (typeof document.execCommand !== "function") { weui.alert(a); return } var b = document.createElement("textarea"); b.value = a; b.setAttribute('style', 'display: block;width: 1px;height: 1px;'); document.body.appendChild(b); b.select(); var c = document.execCommand('copy'); document.body.removeChild(b); if (c) { weui.alert('BP链接已经复制到剪切板中，请保存好使用【已有BP链接跳转 】'); return } if (typeof document.createRange !== "function") { weui.alert(a); return } var d = document.createRange(); var e = document.createElement('div'); e.innerHTML = a; e.setAttribute('style', 'height: 1px;fontSize: 1px;overflow: hidden;'); document.body.appendChild(e); d.selectNode(e); const selection = window.getSelection(); if (selection.rangeCount > 0) { selection.removeAllRanges() } selection.addRange(d); document.execCommand('copy'); weui.alert(a) } function getNowFormatDateTime() { let date = new Date(); let seperator1 = "-"; var a = date.getFullYear(); var b = date.getMonth() + 1; var c = date.getDate(); date.setMinutes(date.getMinutes() + 1); let hour = date.getHours(); let strMinutes = date.getMinutes(); if (b >= 1 && b <= 9) { b = "0" + b } if (c >= 0 && c <= 9) { c = "0" + c } if (strMinutes >= 0 && strMinutes <= 9) { strMinutes = "0" + strMinutes } var d = a + seperator1 + b + seperator1 + c + 'T' + hour + ':' + strMinutes; return d }}) |
分享
最后分享关于其他两种个人比较常遇到的脚本类型和解混淆的py脚本
划红色框框的是我用来拾取混淆特征的，当然如果有兄弟碰到的也是这样的，但是变量名之类的可能有所改动，可以自行在脚本中修改特征，否则会因为不识别而解不了。
另外针对这两种脚本，我输出了其中的网址混淆部位，目的是为了更快的提取特征。
1 2 3 4 5 6 7 8 | 识别代码片段（可以自行更改） # judge standard # 第一种混淆格式判断 self.type1 = "'%3C%73%63%72%69%70%74%20%6C%61%6E%67%75%61%67%65%3D%22%6A%61%76%61%73%63%72%69%70%74%22%3E%66%75%6E%63%74%69%6F%6E%20%64%46%28%73%29%7B%76%61%72%20%73%31%3D%75%6E%65%73%63%61%70%65%28%73%2E%73%75%62%73%74%72%28%30%2C%73%2E%6C%65%6E%67%74%68%2D%31%29%29%3B%20%76%61%72%20%74%3D%27%27%3B%66%6F%72%28%69%3D%30%3B%69%3C%73%31%2E%6C%65%6E%67%74%68%3B%69%2B%2B%29%74%2B%3D%53%74%72%69%6E%67%2E%66%72%6F%6D%43%68%61%72%43%6F%64%65%28%73%31%2E%63%68%61%72%43%6F%64%65%41%74%28%69%29%2D%73%2E%73%75%62%73%74%72%28%73%2E%6C%65%6E%67%74%68%2D%31%2C%31%29%29%3B%64%6F%63%75%6D%65%6E%74%2E%77%72%69%74%65%28%75%6E%65%73%63%61%70%65%28%74%29%29%3B%7D%3C%2F%73%63%72%69%70%74%3E'" self.type2 = "dF('" # 第二种混淆格式判断 self.type3 = "o1,o2,o3,h1,h2,h3,h4,bits,i=0,enc=" self.type4 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" |
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