前言
好久沒有寫猿人學的分析了,今天來分析一波
打開網址:
同樣的,也很輕易的拿到接口,
然後這個接口裏的請求參數又是迷人的m,m就是我們的目標了
分析
老規矩,搜索:
搜一堆出來,感覺都不太靠譜
那咋辦?先看特徵,看這個長度是多少的,臥槽,這個長度有點少見了
點調用棧看看:
看到這個就很可疑了
爲啥這麼說,dispatch分發請求,匿名函數操作,實際的request,所以,關鍵的邏輯一定在這個request或者匿名函數anonymous前後,再看js名字就叫webpack,那就是webpack打包的,那前面才分析過webpack的東西,不用怕,點進去看:
進來都到這裏,打上斷點,翻頁看看,這不就找到了嗎,看着webpack唬人,感覺沒兩樣啊
然後看邏輯,m的值就是n[e(528)](btoa, p_s)生成的了,然後傳入的參數btoa,這個可以直接調用,不用多說,再看後面的p_s,定義就在上面,那就只剩n[e(528)]這個不知道啥東西了,鼠標放上去,發現,這個就是前面說的匿名函數anonymous了
點過去,發現就在上面,然後看邏輯,第一個參數是個函數,然後把第二個參數傳入函數直接返回,這個不就是python裏的裝飾器嘛,
那麼,也就是說,實際的加密邏輯就是btoa(p_s)
控制檯操作下:
這不就出來了嗎
然後,前面js逆向安全專題裏說了,btoa就是個base64的函數,直接忽略了,python裏直接就有,主要是後面的這個參數:
p_s = Date[e(496)](new Date)[e(517)]()
時間相關的都好說,就差這個e(517)和e(496)了,控制檯看是啥東西:
最後的結果:
然後這個時間戳的話,是毫秒級別的,13位
調試
那行,直接在python裏搞一個看行不行
突然感覺跟預期的有點不一樣,這個長度不對啊
首先,整個結果就不對的,
然後再用node操作也報錯:
從node版本16開始,原生支持atob,btoa,但是之前不支持
拿得從長記憶了,控制檯打印下:
雙擊返回的,進入,如下,這他媽一看,典型的obfuscator混淆啊(別問我怎麼看出來的)
既然是ob,先把這個btoa的上級整個摳出來的,此時有兩套方案
- 第一個可以用ast對ob混淆反混淆,然後整體邏輯就會很清晰,後續就能很快解決問題,前提得回ast,且熟悉ob混淆邏輯
- 第二個不用反混淆,直接補環境也是可以的,但是這個補環境時,如果環境沒補好,容易出現錯誤的結果
ob混淆的話,得花好幾期的博客文章才能說清楚,爲了照顧對這方面不太理解的朋友,所以我選用第二個方案,補環境,摳代碼:
如下,摳出來後,執行,
把u補上,找到u:
補上並執行:
繼續補_0x34e7並執行:
補f,同同時,把標註出來的刪了
補完,這裏的f用了u,所以要放在u下面
繼續補d
繼續補window
補md5
補n,其實這裏看到,這個n就是webpack的加載器,或者叫分發器
出現如下,r,但是剛纔的n並沒有帶入參數啊,
再看源站裏的,此時才發下,n並不是剛纔定位到的,而是上面的n
所以還是不能信鼠標放上去的跳轉啊,尤其這種就一個字母,很容易鏈接錯,因爲作用域的問題,你很有可能鏈接到同名的其他地方去了,像上面就是
看到用了個_0x4c28,乾脆把這裏都複製下來:
執行,終於有結果了
調試
然後再在瀏覽器裏執行看看,注意,我直接把window = global刪了,window.md5直接改成了md5,因爲瀏覽器環境裏自帶有window對象,所以不用補了
結果也是有的,那麼怎麼確定這個結果就跟官方的一樣呢,用同一個時間地址就可以了:
先看,這是官方的結果:
把這個值直接放到扣出來的代碼執行,node裏:
瀏覽器的source - snippet裏
三個值都不一樣,那多半也沒法用啊,哪裏有問題呢?
再從頭看下:
應該就是檢測了環境,剛纔補的環境還是有問題,想到剛纔的delete那裏:
這裏只能一行一行看了,可以對這裏打上斷點一點點看了:
然後這裏看到這個n:
剛纔我們也補了一個n,對比下區別,下面是自己補的,這個值明顯就不對了啊,怎麼辦
看到源網站的n:
那就把相關的都補上吧,放在for循環上邊點:
好的,現在看,然後發現,即使我把時間寫死了,每次執行還是會有不同的結果,那就不多說了,直接拿來請求看看能不能有正常結果吧,先稍微改下js文件:
python調用:
那就可以,整理下求和吧
填入答案:
js代碼:
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1200080426); continue; case "11": x = i[r(38)](l, x, T, w, b, e[i[r(82)](d, 0)], 20, -373897302); continue; case "12": w = i[r(38)](s, w, b, x, T, e[i[r(82)](d, 9)], 12, -1958435417); continue; case "13": b = i.XfWkD(s, b, x, T, w, e[i.xcQTI(d, 8)], 7, 1770035416); continue; case "14": var m = b; continue; case "15": w = i[r(38)](u, w, b, x, T, e[i.xcQTI(d, 8)], 11, -2022574463); continue; case "16": b = f(b, m); continue; case "17": w = i[r(111)](f, w, g); continue; case "18": x = l(x, T, w, b, e[i[r(78)](d, 12)], 20, -1921207734); continue; case "19": w = i[r(40)](u, w, b, x, T, e[d + 4], 11, 1272893353); continue; case "20": T = i[r(20)](u, T, w, b, x, e[i.PlAEw(d, 11)], 16, 1839030562); continue; case "21": b = s(b, x, T, w, e[i[r(123)](d, 12)], 7, 1804550682); continue; case "22": x = u(x, T, w, b, e[i[r(123)](d, 10)], 23, -1094730640); continue; case "23": T = i[r(67)](c, T, w, b, x, e[d + 14], 15, -1416354905); continue; case "24": b = s(b, x, T, w, e[i[r(123)](d, 4)], 7, -176418897); continue; case "25": w = i.UXeVn(u, w, b, x, T, e[d + 0], 11, -358537222); continue; case "26": b = i.UXeVn(l, b, x, T, w, e[i[r(62)](d, 1)], 5, -165796510); continue; case "27": b = i.UXeVn(u, b, x, T, w, e[i[r(62)](d, 13)], 4, 681279174); continue; case "28": b = i[r(12)](l, b, x, T, w, e[i[r(138)](d, 9)], 5, 568446438); continue; case "29": w = i.yMPhx(c, w, b, x, T, e[d + 7], 10, 11261161415); continue; case "30": var g = w; continue; case "31": b = c(b, x, T, w, e[i.yGmJD(d, 8)], 6, 1873313359); continue; case "32": x = i.aFxRD(f, x, y); continue; case "33": T = i[r(12)](l, T, w, b, x, e[i[r(121)](d, 15)], 14, -660478335); continue; case "34": T = i.kHuTw(u, T, w, b, x, e[d + 3], 16, -722881979); continue; case "35": b = i[r(50)](l, b, x, T, w, e[i[r(121)](d, 5)], 5, -701520691); continue; case "36": T = l(T, w, b, x, e[i[r(121)](d, 3)], 14, -187363961); continue; case "37": T = i[r(142)](u, T, w, b, x, e[i.QgSUn(d, 7)], 16, -155497632); continue; case "38": b = i.FcXlo(u, b, x, T, w, e[i.koePJ(d, 5)], 4, -378558); continue; case "39": w = i[r(142)](u, w, b, x, T, e[i[r(90)](d, 12)], 11, -421815835); continue; case "40": T = i[r(59)](u, T, w, b, x, e[i[r(28)](d, 15)], 16, 530742520); continue; case "41": x = i.wvVCN(s, x, T, w, b, e[d + 15], 22, 1236531029); continue; case "42": x = i[r(59)](l, x, T, w, b, e[i[r(119)](d, 4)], 20, -405537848); continue; case "43": b = i[r(59)](s, b, x, T, w, e[i.lvwPz(d, 0)], 7, -680976936); continue; case "44": b = i[r(59)](u, b, x, T, w, e[i[r(45)](d, 1)], 4, -1530992060); continue; case "45": x = i.nCrbn(u, x, T, w, b, e[i[r(129)](d, 14)], 23, -35311556); continue; case "46": b = c(b, x, T, w, e[i[r(42)](d, 12)], 6, 1700485571); continue; case "47": x = i[r(7)](u, x, T, w, b, e[i.kaQlD(d, 2)], 23, -995338651); continue; case "48": T = c(T, w, b, x, e[d + 6], 15, -1560198380); continue; case "49": w = i[r(145)](l, w, b, x, T, e[i[r(107)](d, 6)], 9, -1069501632); continue; case "50": x = i[r(134)](c, x, T, w, b, e[i[r(89)](d, 1)], 21, -2054922799); continue; case "51": x = i.fmdcS(l, x, T, w, b, e[d + 8], 20, 1163531501); continue; case "52": x = i[r(15)](c, x, T, w, b, e[i[r(9)](d, 13)], 21, 1309151649); continue; case "53": x = i[r(15)](s, x, T, w, b, e[i[r(56)](d, 11)], 22, -1990404162); continue; case "54": w = i[r(6)](s, w, b, x, T, e[i[r(32)](d, 13)], 12, -40341101); continue; case "55": x = i.sFtiw(s, x, T, w, b, e[i.UAFHv(d, 7)], 22, -45705983); continue; case "56": T = i.sFtiw(s, T, w, b, x, e[i.MFmWH(d, 6)], 17, -1473231341); continue; case "57": w = i[r(99)](s, w, b, x, T, e[i.MFmWH(d, 1)], 12, -389564586); continue; case "58": x = c(x, T, w, b, e[i[r(39)](d, 9)], 21, -343485551); continue; case "59": b = i[r(113)](c, b, x, T, w, e[i[r(39)](d, 4)], 6, -145523070); continue; case "60": T = i.bRLIN(s, T, w, b, x, e[i[r(39)](d, 10)], 17, -42063); continue; case "61": var v = T; continue; case "62": b = i[r(66)](c, b, x, T, w, e[d + 0], 6, -198630844); continue; case "63": w = i[r(66)](c, w, b, x, T, e[i[r(13)](d, 15)], 10, -30611744); continue; case "64": x = c(x, T, w, b, e[d + 5], 21, -57434055); continue; case "65": T = i[r(29)](l, T, w, b, x, e[i[r(13)](d, 7)], 14, 1735328473); continue; case "66": w = i[r(29)](c, w, b, x, T, e[i[r(79)](d, 11)], 10, -1120210379); continue; case "67": var y = x; continue; case "68": w = i[r(1)](l, w, b, x, T, e[d + 10], 9, 38016083); continue; case "69": T = i[r(1)](s, T, w, b, x, e[i[r(79)](d, 14)], 17, -1502002290); continue; case "70": T = i.SUrST(c, T, w, b, x, e[i[r(79)](d, 2)], 15, 718787259); continue; case "71": T = l(T, w, b, x, e[i[r(81)](d, 11)], 14, 643717713); continue } break } continue; case "1": var b = 1732584193; continue; case "2": return Array(b, x, T, w); case "3": e[i.MXnIN(n, 5)] |= i[r(23)](128, i[r(54)](n, 32)); continue; case "4": var x = -271733879; continue; case "5": var w = 271733878; continue; case "6": e[i.BQgZQ(i[r(115)](n + 64, 9), 4) + 14] = n; continue; case "7": var T = -1732584194; continue } break } } function a(e, n, r, o, a, s) { var l = t; return f(i.BtzmV(d, i[l(44)](f, i.dbmfK(f, n, e), i[l(30)](f, o, s)), a), r) } function s(e, n, r, o, s, l, u) { var c = t; return a(i[c(143)](i[c(101)](n, r), i[c(101)](~n, o)), e, n, s, l, u) } function l(e, n, r, o, s, l, u) { var c = t; return i[c(122)](a, i[c(143)](i.ZpUiH(n, o), i.ZpUiH(r, ~o)), e, n, s, l, u) } function u(e, n, r, o, s, l, u) { return i[t(122)](a, i.tsNzQ(n ^ r, o), e, n, s, l, u) } function c(e, n, r, o, s, l, u) { var c = t; return i[c(122)](a, i[c(130)](r, i[c(41)](n, ~o)), e, n, s, l, u) } function f(e, n) { var r = t , o = i[r(95)](65535 & e, i.iqfMz(n, 65535)) , a = i[r(95)](e >> 16, i[r(97)](n, 16)) + i[r(97)](o, 16); return i[r(103)](i[r(84)](a, 16), i[r(105)](o, 65535)) } function d(e, n) { var r = t; return i.abYok(e << n, e >>> i[r(8)](32, n)) } function p(e) { for (var n = t, r = i[n(137)](Array), o = i[n(8)](i.vRqUp(1, 16), 1), a = 0; a < i.FDfcp(e[n(108)], 16); a += 16) r[i[n(97)](a, 5)] |= i[n(102)](i[n(27)](e[n(127)](i[n(26)](a, 16)), o), i[n(54)](a, 32)); return r } function h(e) { for (var n = t, r = i[n(49)], o = "", a = 0; i.iXQwu(a, i[n(74)](e[n(108)], 4)); a++) o += i.xgzfr(r[n(64)](15 & i[n(36)](e[i[n(36)](a, 2)], i[n(46)](i[n(74)](a % 4, 8), 4))), r[n(64)](15 & i.wWwRM(e[a >> 2], i[n(47)](a % 4, 8)))); return o } return i[t(0)]((function (e) { var n = t; return i[n(144)](h, i[n(76)](o, i.vyNVU(p, e), 16 * e[n(108)])) } ), e) } var _0x34e7 = [ "split", "ABHICESQWK", "FKByN", "U987654321", "lmHcG", "dICfr", "Szksx", "Bgrij", "iwnNJ", "jihgfdecba", "GfTek", "gfdecbaZXY", "constructo", "QIoXW", "jLRMs", "AqLWq", "0zyxwvutsr", "TKgNw", "eMnqD", "thjIz", "btoa", "MNPQRSTWXY", "oPsqh", "niIlq", "evetF", "LVZVH", "fYWEX", "kmnprstwxy", "aYkvo", "tsrqpomnlk", "HfLqY", "aQCDK", "lGBLj", "test", "3210zyxwvu", "QWK2Fi", "return /\" ", "hsJtK", "jdwcO", "SlFsj", "OWUOc", "LCaAn", "[^ ]+)+)+[", "FAVYf", "2Fi+987654", "floor", "join", "EuwBW", "OXYrZ", "charCodeAt", "SkkHG", "iYuJr", "GwoYF", "kPdGe", "cVCcp", "INQRH", "INVALID_CH", "charAt", "push", "apply", "lalCJ", "kTcRS", "+ this + \"", "ykpOn", "gLnjm", "gmBaq", "kukBH", "dvEWE", "SFKLi", "^([^ ]+( +", "qpomnlkjih", "^ ]}", "pHtmC", "length" ] var l = function (e, t) { return _0x34e7[e -= 188] } , u = l function d(e) { var t = u , n = {}; n[t(214)] = function (e, t) { return e || t } , n.bWcgB = function (e, t) { return e * t } , n[t(227)] = "ABCDEFGHJK" + t(209) + "Zabcdefhij" + t(215) + "z2345678"; for (var r = n, o = "1|3|0|4|2|5"[t(188)]("|"), a = 0; ;) { switch (o[a++]) { case "0": var s = l[t(261)]; continue; case "1": e = r[t(214)](e, 32); continue; case "2": for (i = 0; i < e; i++) c += l[t(245)](Math[t(233)](r.bWcgB(Math.random(), s))); continue; case "3": var l = r[t(227)]; continue; case "4": var c = ""; continue; case "5": return c } break } } function btoa(e) { var t = u, r = {}; var f = u(191) + u(204) + u(258) + u(199) + "WVUTSRQPON" + u(189) + u(232) + u(222) + u(217) + u(197) + "ZXYWVUTSRQPONABHICES" + u(223); r.TGmSp = t(244) + "ARACTER_ERR", r[t(238)] = t(224) + t(250) + "/", r[t(205)] = "^([^ ]+( +" + t(230) + t(259), r.aYkvo = function (e) { return e(); }, r[t(254)] = function (e, t) { return e % t; }, r.evetF = function (e, t) { return e >> t; }, r.GfTek = t(196), r[t(260)] = function (e, t) { return e << t; }, r[t(229)] = function (e, t) { return e | t; }, r[t(242)] = function (e, t) { return e << t; }, r[t(228)] = function (e, t) { return e & t; }, r[t(207)] = function (e, t) { return e << t; }, r[t(202)] = function (e, t) { return e & t; }, r.jdwcO = function (e, t) { return e === t; }, r.kPdGe = t(231), r[t(195)] = t(213), r[t(201)] = function (e, t) { return e & t; }, r[t(206)] = function (e, t) { return e == t; }, r[t(219)] = function (e, t) { return e + t; }, r[t(220)] = function (e, t) { return e(t); }; var i = r; if (/([^\u0000-\u00ff])/.test(e)) { throw new Error(i.TGmSp); } function n(r) { if (t[r]) return t[r].exports; var i = t[r] = { exports: {} }; return e[r].call(i.exports, i, i.exports, n), i.exports } n.g = function () { if ("object" == typeof globalThis) return globalThis; try { return this || new Function("return this")() } catch (e) { if ("object" == typeof window) return window } }() for (var o, a, s, l = 0, c = []; l < e[t(261)];) { switch (a = e[t(237)](l), s = i.kukBH(l, 6)) { case 0: c[t(246)](f[t(245)](i[t(212)](a, 2))); break; case 1: try { "WhHMm" === i[t(198)] || n.g && c[t(246)](f[t(245)](i.pHtmC(2 & o, 3) | i.evetF(a, 4))); } catch (e) { c[t(246)](f[t(245)](i[t(229)](i.cVCcp(3 & o, 4), a >> 4))); } break; case 2: c[t(246)](f[t(245)](i[t(229)](i[t(242)](15 & o, 2), i.evetF(a, 6)))), c[t(246)](f[t(245)](i[t(228)](a, 63))); break; case 3: c[t(246)](f[t(245)](i[t(212)](a, 3))); break; case 4: c.push(f[t(245)](i[t(229)](i[t(207)](i.OWUOc(o, 4), 6), i[t(212)](a, 6)))); break; case 5: c[t(246)](f[t(245)](i[t(229)](i[t(207)](i[t(202)](o, 15), 4), a >> 8))), c.push(f.charAt(i[t(202)](a, 63))); } o = a, l++; } return 0 == s ? i[t(226)](i[t(241)], i[t(195)]) || (c[t(246)](f[t(245)](i[t(201)](o, 3) << 4)), c.push("FM")) : i.eMnqD(s, 1) && (c[t(246)](f[t(245)]((15 & o) << 2)), c[t(246)]("K")), i[t(219)](i.aQCDK(d(15), window.md5(c[t(234)](""))), i[t(220)](d, 10)); } function get_m() { kk = Date.parse(new Date).toString() console.log(kk) return [btoa(kk), kk] } console.log(get_m())
python代碼:
import requests headers = { "authority": "match.yuanrenxue.com", "x-requested-with": "XMLHttpRequest", "sec-ch-ua-mobile": "?0", 'cookie': 'sessionid=換成你的sessionid', "user-agent": "yuanrenxue.project", "sec-ch-ua-platform": "\"Windows\"", "sec-fetch-site": "same-origin", "sec-fetch-mode": "cors", "sec-fetch-dest": "empty", "referer": "https://match.yuanrenxue.com/match/16", "accept-language": "zh-CN,zh;q=0.9" } url = "https://match.yuanrenxue.com/api/match/16" def get_m(): import execjs with open('get_m.js') as f: cont = f.read() js = execjs.compile(cont) result = js.call('get_m') m, ts = result return m, ts def get_page(page): m, ts = get_m() params = { "page": page, "m": m, "t": ts } with requests.get(url, headers=headers, params=params) as response: print(1232123123,response) result = response.json() data = result.get('data') return [d.get('value') for d in data] def get_data(): end = 0 for i in range(1, 6): temp_list = get_page(i) some = sum(temp_list) end += some print('end', end) get_data()
結語
本次直接忽略ob混淆,硬摳webpack代碼,一樣有結果,難倒是不難,主要有點騷,他改了btoa函數和md5函數的邏輯,不是原生的