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README
Apache-2.0

抖音数据取证(TikTok Data Forensics)

背景(Background)

项目背景:用户手机里一般有很多种APP,每个APP抽象出来大致会存取这些信息:

  • a. 基本信息类:设备基本信息表、sim卡信息、通讯录信息等;
  • b. 即时通讯类:账号信息、好友信息、群组信息、聊天记录信息等;
  • c. 互动类:账号信息、好友信息、博客内容信息、评论信息、回复信息等;
  • d. 电子邮箱类:账号信息、联系人信息、信息内容等;
  • e. 浏览类信息:网站密码、收藏夹、历史记录、COOKIES等;
  • f. 地理信息:地图定位、行程、交通工具等;
  • g. 电子商务信息:订单、快递、银行卡等;

例如抖音APP的数据一般会存放在手机里的某个文件夹下,这个文件夹对用户来说是私密的,使用抖音的用户是看不到自己的手机里的用户数据的。 如果需要对手机里的某个APP进行数据分析,这需要两个步骤:先从手机取出数据,再对数据进行分析。

1. 如何拿到手机里的数据?

a. 可以通过adb取,即Android 调试桥 (ADB)

b. 也可以通过别的方式(手机自带的文件传输工具,比如vivo换机助手,模拟助手与手机进行通信等)。

这个项目是基于已经提取到的手机数据,已经把数据取出来了,放到了电脑上(比如:TestData文件夹),然后对提取到的数据进行解密分析。一般而言,每个APP存放的数据大致都这种文件目录下...\data\data\com.ss.android.ugc.aweme\...\databases

2. 拿到手机数据后,进行提取

a. 要根据规定的数据库接口规范,读取上述提取到的文件夹下的数据库(sqlite),sqlite是一个移动端通用的轻量级数据库。

b. 手机里的APP数据可能会分散在各个数据库里,需要的信息可能要在多个库里取。对于抖音来说,有用户自身的账号信息,也有联系人信息,还有别的信息(登录时间、操作记录等)。

c. 所以,流程就是:读手机数据库-->解析数据格式-->存入目的数据库。

使用方式

  1. 主程序入口:maintest.cpp
  2. 程序的一些执行参数先以Base64编码,再调用解析函数得到相关的参数
  3. 上面的参数中会得到文件路径,一般是电脑上的路径
std::string strpath = "D:\\***";
std::wstring msgfilesavepath = L"F:\\***";
std::wstring createtotalpath = L"F:\\***.db";

这里的三个路径解释为:

a. strpath:提取到的手机数据路径,比如当前的:\TestData\com.ss.android.ugc.aweme\databases

b. msgfilesavepath:聊天内容的存放路径

c. createtotalpath:存放解析内容的目的数据库路径(sqlite),所以是以".db"结尾

  1. 需要引用几个外部库:sqlite3、json、curl等
  2. 对数据库的提取和存入操作主要在"dbOperations.cpp"中,还有一些帮助工具存放在"helptool.cpp"中
  3. 可以自定义日志输出格式

说明

  1. 本项目为入职时的练手项目,具体业务逻辑不方便细说,但本项目不涉及公司内部机密,不存在泄露风险,且代码已经做了消敏。
  2. 本项目基于C++11,语法相对简单,大量使用了vector、string和wstring类,而且涉及到中文字符,用了很多编码转换。
  3. 存取数据库的代码逻辑是基于公司的数据库存取格式实现的。
  4. 'TestData'文件夹是从测试机里取出的一个抖音数据包。
  5. 当抖音版本变高(> 20.0.4)时,数据库可能被加密了,需要逆向破解。
  6. sqlite3 的使用文档:SQLite
  7. json 的使用文档:nlohmann/json
  8. libcurl 的使用文档:LibCurl
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简介

在睿海入职时做的小项目。针对抖音app,解析抖音存放在手机里的数据。 展开 收起
C++ 等 2 种语言
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