安卓逆向_20 --- 模拟器检测、反调试检测、ELF动态调试、__libc_init 下断

╰+攻爆jí腚メ 2023-02-18 01:42 19阅读 0赞

From（ 模拟器检测实战分析 ）：[https://www.bilibili.com/video/BV1UE411A7rW?p=65][https_www.bilibili.com_video_BV1UE411A7rW_p_65]

怎样过 app 的模拟器检测：[https://bbs.pediy.com/thread-249759.htm][https_bbs.pediy.com_thread-249759.htm]

Android 模拟器如何不被检测思路：[https://bbs.pediy.com/thread-227050.htm][https_bbs.pediy.com_thread-227050.htm]

Android 模拟器检测常用方法：[https://blog.csdn.net/sinat\_33150417/article/details/51320228][https_blog.csdn.net_sinat_33150417_article_details_51320228]

如何判断 Android 设备是真机还是模拟器？：[https://www.zhihu.com/question/21355176/answer/272069337][https_www.zhihu.com_question_21355176_answer_272069337]

检测 Android 模拟器的方法和代码实现：[https://blog.csdn.net/earbao/article/details/82746605][https_blog.csdn.net_earbao_article_details_82746605]

一行代码帮你检测Android模拟器（更新至1.1.0）：[https://www.jianshu.com/p/434b3075b5dd][https_www.jianshu.com_p_434b3075b5dd]

过 apk 模拟器检测，关于特定模拟器检测蓝叠模拟器：[https://www.52pojie.cn/thread-1039699-1-1.html][https_www.52pojie.cn_thread-1039699-1-1.html]

android-模拟器检测方法：[https://www.jianshu.com/p/ec99371f00ed][https_www.jianshu.com_p_ec99371f00ed]

模拟器检测

## 使用 AndroidStudio 动态调试 smali 代码 查找 检测模拟器 代码 ##

在 **入口点**、**入口页面** 看下 ，分析有没有模拟器检测。。。

使用 AndroidStudio 动态调试 smali 代码 查找 检测模拟器 代码：[https://www.bilibili.com/video/BV1UE411A7rW?p=65][https_www.bilibili.com_video_BV1UE411A7rW_p_65]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70][]

## 反调试检测手段 ##

（ 其实有好多种检测，这里只列举了：关键文件检测、端口检测、进程名检测  来进行简单说明。。。）

IDA Pro 动态调试，分析检测（ 这里分析的是 " **可执行文件** "，**不是 so 库** ）

1. 关键文件检测（ 例如：**android\_server 文件检测** ）：[https://www.bilibili.com/video/BV1UE411A7rW?p=66][https_www.bilibili.com_video_BV1UE411A7rW_p_66]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 1][]

libc\_init

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 2][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 3][]

相关端口检测，例如 23946

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 4][]

进程名称检测

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 5][]

2. 动态轮询检测（ 使用 ptrace ）：[https://www.bilibili.com/video/BV1UE411A7rW?p=67][https_www.bilibili.com_video_BV1UE411A7rW_p_67]

**libc\_init 下断点**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 6][]

源码：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 7][]

trackpid  （ **cat /proc/进程id/status**  、**cat /proc/进程id/cmdline** ）

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 8][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 9][]

## 动态调试 进程名称 检测（ **调试 可执行程序 【****不是 apk****】** ） ##

Android反调试方法总结以及源码实现之检测篇（一）：**[https://blog.csdn.net/feibabeibei\_beibei/article/details/60956307][https_blog.csdn.net_feibabeibei_beibei_article_details_60956307]**

安卓常见的反调试与对抗方案：**[https://www.52pojie.cn/thread-709669-1-1.html][https_www.52pojie.cn_thread-709669-1-1.html]**

视频地址（ **动态调试 ELF** ）：**[https://www.bilibili.com/video/BV1UE411A7rW?p=68][https_www.bilibili.com_video_BV1UE411A7rW_p_68]**

**安卓 反调试**

可执行文件源码（ 编译成可执行文件之后，adb push 传到 手机上执行，然后 **动态调试进程** ）：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 10][]

上传可执行文件到手机，并运行程序：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 11][]

运行 android\_servers

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 12][]

端口转发（ 在打开一个 cmd 窗口，运行 端口转发命令 ）：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 13][]

执行转发命令

![20200620232106909.png][]

使用 IDA Pro 调试

注意：

*  调试 **可执行程序** 是 Debugger ---> run 
 *  调试 so 是 Debugger ---> attach

调试可执行程序：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 14][]

填写可执行文件路径、IP、和 端口号

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 15][]

点击 OK 之后，会挂起程序，然后勾选 三项

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 16][]

因为是从 libc.so 加载的，所以直接点击是跳转不过来的，如图所示：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 17][]

点击运行加载 libc.so

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 18][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 19][]

点击进入 libc.so ，然后再 libc.so  里面搜索 libc，找到 libc\_init，点进去，下断点

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 20][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 21][]

然后再点击 "运行"，让程序运行到断点处。。。

可执行文件 的 导出函数 只有一个 main，点击去，可以找到 \_\_libc\_init ，这个函数有 4 个参数，这4个是固定的

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 22][]

但是怎么找一个可执行文件一开始执行的地方，其实就是 \_\_libc\_init 的第 3 个参数，

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 23][]

即 R2 ，指向 main 函数，即就是程序的入口点。。。

分析 main 函数即可看到 检测逻辑代码

## libc\_init  下断点 ##

libc\_init  下断点：[https://www.bilibili.com/video/BV1UE411A7rW?p=65][https_www.bilibili.com_video_BV1UE411A7rW_p_65]

[https_www.bilibili.com_video_BV1UE411A7rW_p_65]: https://www.bilibili.com/video/BV1UE411A7rW?p=65
[https_bbs.pediy.com_thread-249759.htm]: https://bbs.pediy.com/thread-249759.htm
[https_bbs.pediy.com_thread-227050.htm]: https://bbs.pediy.com/thread-227050.htm
[https_blog.csdn.net_sinat_33150417_article_details_51320228]: https://blog.csdn.net/sinat_33150417/article/details/51320228
[https_www.zhihu.com_question_21355176_answer_272069337]: https://www.zhihu.com/question/21355176/answer/272069337
[https_blog.csdn.net_earbao_article_details_82746605]: https://blog.csdn.net/earbao/article/details/82746605
[https_www.jianshu.com_p_434b3075b5dd]: https://www.jianshu.com/p/434b3075b5dd
[https_www.52pojie.cn_thread-1039699-1-1.html]: https://www.52pojie.cn/thread-1039699-1-1.html
[https_www.jianshu.com_p_ec99371f00ed]: https://www.jianshu.com/p/ec99371f00ed
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2020092800174890.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
[https_www.bilibili.com_video_BV1UE411A7rW_p_66]: https://www.bilibili.com/video/BV1UE411A7rW?p=66
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200928115956253.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200928115106474.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20200928121452845.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 5]: https://img-blog.csdnimg.cn/20200928123539140.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
[https_www.bilibili.com_video_BV1UE411A7rW_p_67]: https://www.bilibili.com/video/BV1UE411A7rW?p=67
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 6]: https://img-blog.csdnimg.cn/20200928124242159.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 8]: https://img-blog.csdnimg.cn/20200928174637152.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 9]: https://img-blog.csdnimg.cn/20200928172930639.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_feibabeibei_beibei_article_details_60956307]: https://blog.csdn.net/feibabeibei_beibei/article/details/60956307
[https_www.52pojie.cn_thread-709669-1-1.html]: https://www.52pojie.cn/thread-709669-1-1.html
[https_www.bilibili.com_video_BV1UE411A7rW_p_68]: https://www.bilibili.com/video/BV1UE411A7rW?p=68
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx_size_16_color_FFFFFF_t_70 10]: https://img-blog.csdnimg.cn/2020092817561339.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ZyZWVraW5nMTAx,size_16,color_FFFFFF,t_70
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[20200620232106909.png]: https://img-blog.csdnimg.cn/20200620232106909.png
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