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zjdroid's Introduction

ZjDroid

Android app dynamic reverse tool based on Xposed framework.

一、ZjDroid工具介绍

ZjDroid是基于Xposed Framewrok的动态逆向分析模块,逆向分析者可以通过ZjDroid完成以下工作: 1、DEX文件的内存dump 2、基于Dalvik关键指针的内存BackSmali,有效破解主流加固方案 3、敏感API的动态监控 4、指定内存区域数据dump 5、获取应用加载DEX信息。 6、获取指定DEX文件加载类信息。 7、dump Dalvik java堆信息。 8、在目标进程动态运行lua脚本。

二、ZjDroid相关命令

1、获取APK当前加载DEX文件信息: adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"dump_dexinfo"}'

2、获取指定DEX文件包含可加载类名: adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"dump_class","dexpath":"*****"}'

4、根据Dalvik相关内存指针动态反编译指定DEX,并以文件形式保存。 adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"backsmali","dexpath":"*****"}'

该方式可以脱壳目前大部分流行的加固防护。(由于手机性能问题,运行较忙) 例外情况: 由于ApkProtect特定防修改检测,需要做如下修改即可解固该保护: (1)在设备上创建特定目录(如/data/local)并 chmod 为777 (2)复制zjdroid.apk到该目录,并修改文件名为zjdroid.jar (3) 修改/data/data/de.robv.android.xposed.installer/conf/modules.list 模块代码文件修改为"zjdroid.jar" 从启设备即可。

5、Dump指定DEX内存中的数据并保存到文件(数据为odex格式,可在pc上反编译)。 adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"dump_dex","dexpath":"*****"}'

6、Dump指定内存空间区域数据到文件 adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"dump_mem","start":1234567,"length":123}'

7、Dump Dalvik堆栈信息到文件,文件可以通过java heap分析工具分析处理。 adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"dump_heap"}'

8、运行时动态调用Lua脚本 该功能可以通过Lua脚本动态调用java代码。 使用场景: 可以动态调用解密函数,完成解密。 可以动态触发特定逻辑。 adb shell am broadcast -a com.zjdroid.invoke --ei target pid --es cmd '{"action":"invoke","filepath":"****"}'

luajava相关使用方法: http://www.keplerproject.org/luajava/

8、敏感API调用监控

三、相关命令执行结果查看:

1、命令执行结果: adb shell logcat -s zjdroid-shell-{package name}

2、敏感API调用监控输出结果: adb shell logcat -s zjdroid-apimonitor-{package name}

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