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本文为看雪安卓高研2w班（8月班）优秀学员作品。
（https://github.com/federicodotta/Brida），抓到视频信息元数据的包、通过brida调用app的解密算法来全自动解密。
首先尝试直接保存到手机
var class_decimg = Java.use("com.ilulutv.fulao2.other.g.b");class_decimg.b.overload('[B', '[B', 'java.lang.String').implementation = function(bArr, bArr2, str){var result = this.b(bArr, bArr2, str);imgResult = result;console.log("imgResult.length->", imgResult.length);var fileName = "/sdcard/fulao2/"+imgResult.length+".jpg";try{var buffer = Memory.alloc(imgResult.length);for(var i=0;i<imgResult.length;i++){var ival = imgResult[i];if(ival < 0) {ival += 256;}// console.log("buffer:",buffer.add(i),ival);buffer.add(i).writeU8(ival);//imgResult[i]}console.log("buffer:", hexdump(buffer));var fd = new File(fileName, "ab+");if (fd && fd != null) {var dex_buffer = ptr(buffer).readByteArray(imgResult.length);fd.write(dex_buffer);fd.flush();fd.close();console.log("[dump img]:", fileName);}}catch(error){console.log("write_file_log error:",error);}return result;}
[object Object]56439buffer: 0 1 2 3 4 5 6 7 8 9 A B C D E F 0123456789ABCDEF95e7f148 ff d8 ff e0 00 10 4a 46 49 46 00 01 01 00 00 01 ......JFIF......95e7f158 00 01 00 00 ff fe 00 3b 43 52 45 41 54 4f 52 3a .......;CREATOR:95e7f168 20 67 64 2d 6a 70 65 67 20 76 31 2e 30 20 28 75 gd-jpeg v1.0 (u95e7f178 73 69 6e 67 20 49 4a 47 20 4a 50 45 47 20 76 36 sing IJG JPEG v695e7f188 32 29 2c 20 71 75 61 6c 69 74 79 20 3d 20 39 30 2), quality = 9095e7f198 0a ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ....C...........95e7f1a8 04 03 03 04 05 08 05 05 04 04 05 0a 07 07 06 08 ................95e7f1b8 0c 0a 0c 0c 0b 0a 0b 0b 0d 0e 12 10 0d 0e 11 0e ................95e7f1c8 0b 0b 10 16 10 11 13 14 15 15 15 0c 0f 17 18 16 ................95e7f1d8 14 18 12 14 15 14 ff db 00 43 01 03 04 04 05 04 .........C......95e7f1e8 05 09 05 05 09 14 0d 0b 0d 14 14 14 14 14 14 14 ................95e7f1f8 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 ................95e7f208 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 ................95e7f218 14 14 14 14 14 14 14 14 14 14 14 ff c0 00 11 08 ................95e7f228 01 ca 03 1b 03 01 22 00 02 11 01 03 11 01 ff c4 ......".........95e7f238 00 1f 00 00 01 05 01 01 01 01 01 01 00 00 00 00 ................img]: /sdcard/fulao2/56439.jpg
配置rpc下载
var class_decimg = Java.use("com.ilulutv.fulao2.other.g.b");class_decimg.b.overload('[B', '[B', 'java.lang.String').implementation = function(bArr, bArr2, str){var result = this.b(bArr, bArr2, str);imgBase64Arr[imginx++] = gson.$new().toJson(result);return result;}rpc.exports = {getimgarr : function(i){var result = '';if(i in imgBase64Arr){try{result = imgBase64Arr[i];console.log("imgBase64Arr[i] result->", result.length);}catch(error){console.log(error);}}else{console.log("i in imgBase64Arr false");}return result;},getimginx : function(){return imginx;},clearimgarr: function(start,len){for(var i = 0; i< len;i++){// imgBase64Arr[start+i] = "clear";delete imgBase64Arr[start+i];}}}
def downImg(imgDataStr):try:ms = re.findall("(-?d+)", imgDataStr)intArr = []for m in ms:ival = int(m)if ival < 0:ival += 256intArr.append(ival)bs = bytes(intArr)m = hashlib.md5()m.update(bs)downname = m.hexdigest()with open("download/"+downname+".jpg", 'ab') as f:f.write(bs)print("download sucess->"+ downname+".jpg")except Exception as e:print("downImg Error->")imginx = 0while True:try:imgArrValue = script.exports.getimginx()while imgArrValue > imginx:imgobj = script.exports.getimgarr(imginx)downImg(imgobj)script.exports.clearimgarr(imginx, 1)imginx += 1print(imgArrValue)time.sleep(3)except Exception as ex:print("Error:", ex)break
显示解密的视频信息元数据
public void a(String str, int i2) {switch (i2) {case 82000:VideoInfoGson videoInfoGson = (VideoInfoGson) a(str, (Class<?>) VideoInfoGson.class);a(videoInfoGson.getStatus().getCode(), videoInfoGson.getStatus().getMessage(), videoInfoGson, this);return;case 82001:com.ilulutv.fulao2.other.b.t = str;g.m(str);if (str.isEmpty()) {Crashlytics.logException(new Exception("BC" + str));}MenuTitleGson menuTitleGson = (MenuTitleGson) a(str, (Class<?>) MenuTitleGson.class);if (g.v0()) {g.e(menuTitleGson.getResponse().getMenus().getUncoverX().size());} else {g.e(0);}if (g.u0()) {g.d(menuTitleGson.getResponse().getMenus().getCoverX().size());} else {g.d(0);}a(menuTitleGson.getStatus().getCode(), menuTitleGson.getStatus().getMessage(), menuTitleGson, this);return;case 82002:LikeGson likeGson = (LikeGson) a(str, (Class<?>) LikeGson.class);a(likeGson.getStatus().getCode(), likeGson.getStatus().getMessage(), likeGson, this);return;case 82003:ReportVideoGson reportVideoGson = (ReportVideoGson) a(str, (Class<?>) ReportVideoGson.class);a(reportVideoGson.getStatus().getCode(), reportVideoGson.getStatus().getMessage(), reportVideoGson, this);return;case 82004:VideoListGson videoListGson = (VideoListGson) a(str, (Class<?>) VideoListGson.class);a(videoListGson.getStatus().getCode(), videoListGson.getStatus().getMessage(), videoListGson, this);return;case 82005:c(str);return;case 82006:AdGson2 adGson2 = (AdGson2) a(str, (Class<?>) AdGson2.class);a(adGson2.getStatus().getCode(), adGson2.getStatus().getMessage(), adGson2, this);return;case 82007:ActorInfoGson actorInfoGson = (ActorInfoGson) a(str, (Class<?>) ActorInfoGson.class);a(actorInfoGson.getStatus().getCode(), actorInfoGson.getStatus().getMessage(), actorInfoGson, this);return;case 82008:a(str);return;case 82009:VideoLikeListGson videoLikeListGson = (VideoLikeListGson) a(str, (Class<?>) VideoLikeListGson.class);a(videoLikeListGson.getStatus().getCode(), videoLikeListGson.getStatus().getMessage(), videoLikeListGson, this);return;case 82010:e(str);return;case 82011:d(str);return;case 82012:CurrentOrderGson currentOrderGson = (CurrentOrderGson) a(str, (Class<?>) CurrentOrderGson.class);a(currentOrderGson.getStatus().getCode(), currentOrderGson.getStatus().getMessage(), currentOrderGson, this);return;case 82013:HistoryOrdersGson historyOrdersGson = (HistoryOrdersGson) a(str, (Class<?>) HistoryOrdersGson.class);a(historyOrdersGson.getStatus().getCode(), historyOrdersGson.getStatus().getMessage(), historyOrdersGson, this);return;case 82014:g(str);return;case 82015:f(str);return;case 82016:UserInfoGson userInfoGson = (UserInfoGson) a(str, (Class<?>) UserInfoGson.class);a(userInfoGson.getStatus().getCode(), userInfoGson.getStatus().getMessage(), userInfoGson, this);return;case 82017:AddUserSourceGson addUserSourceGson = (AddUserSourceGson) a(str, (Class<?>) AddUserSourceGson.class);a(addUserSourceGson.getStatus().getCode(), addUserSourceGson.getStatus().getMessage(), addUserSourceGson, this);return;case 82018:a((Object) str);return;case 82019:WatchHistoryListsGson watchHistoryListsGson = (WatchHistoryListsGson) a(str, (Class<?>) WatchHistoryListsGson.class);a(watchHistoryListsGson.getStatus().getCode(), watchHistoryListsGson.getStatus().getMessage(), watchHistoryListsGson, this);return;case 82020:b(str);return;case 82021:NoticeListGson noticeListGson = (NoticeListGson) a(str, (Class<?>) NoticeListGson.class);a(noticeListGson.getStatus().getCode(), noticeListGson.getStatus().getMessage(), noticeListGson, this);return;case 82022:NoticeListGsonTwo noticeListGsonTwo = (NoticeListGsonTwo) a(str, (Class<?>) NoticeListGsonTwo.class);a(noticeListGsonTwo.getStatus().getCode(), noticeListGsonTwo.getStatus().getMessage(), noticeListGsonTwo, this);return;default:return;}}
var BaseCheckStatusRetrofit = Java.use('c.c.a.h.a.c');BaseCheckStatusRetrofit.a.overload('java.lang.String', 'int').implementation = function(str, i2){this.a(str, i2);if(i2 == 82018){send("BaseCheckStatusRetrofit.a->"+str)}}
def on_message(message, data):if message['type'] == 'send':if "BaseCheckStatusRetrofit.a->" in message['payload']:print('[*] start load m3u8->')ms = re.findall("([^$]+?)#EXTINF[^$]+-(d+).ts",message['payload'].replace("BaseCheckStatusRetrofit.a->",""))if len(ms) > 0:print("m3u8 Header->n", ms[0][0])print("m3u8 ts Length->", ms[0][1])else:print('[*] '+message['payload'])
ffmpeg下载视频
安装配置
-
0.4版本主要更新是新增了Custonm Plugins选项卡，有4种类型的内部插件使用也比较方便。 -
还有一点就是RPC导出的函数没必要hex转来转去，直接使用字符串就可以了。如果是老版本代码去掉hexToString,stringToHex的调用即可。 -
Win10我配置后console.log获取不到打印，不知道什么原因，然后kali正常，后面测试也都是在kali上。 -
最开始写代码最好在Debug export中测试正常后再使用插件调用
自动解密
contextcustom1: function (tm, content) {// console.log("Brida start :--->", tm, content);// return "success";var result;Java.perform(function () {try {var key = "fe34dd6bbd3020c2fb69abe73b5b973c";var aes = Java.use("com.ilulutv.fulao2.other.g.b");var md5result = aes.e(tm);// console.log("Brida : md5result--->",md5result);var iv = md5result.substring(8,24);result = aes.a(key, iv, content);console.log("Brida : encrypt after--->",result.length);} catch (error) {console.log("[!]Exception:" + error.message);}});return result;},
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