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John Doe
John Doe

Posted on • Originally published at reddit.com

Android Virtualization Product Testing

Preface

Nowadays, android virtualization technology has become very popular. There have been a ton of online articles about the principles of virtualization. This article compares the differences between virtualization products from the perspective of real testing.

Terminology

Abbr. Full Name Description
Host Host The original application, i.e. the application itself
Sub Applications Sub Applications The application being run
PMS PackageManagerService Package management services in Android
AMS ActivityManagerService Activity management services in Android
NMS NotificationManagerService Notification management service in Android

How Virtualization Works?

There have been many similar articles on this issue online, here are a few to read

Through the principle analysis, we can see that to achieve virtualization of an application, the most important thing is: when running sub-applications, deceive the system thereby making the system mistakenly believe that the application currently being run is the host application , otherwise the system will not hesitate to kill it!

Entry points for testing

I plan to test the following key aspects of virtualization in order to compare the strengths and weaknesses of each framework.

The products involved in the comparison are:

Items for comparison:

Method Expected Value
Context#mBasePackageName Package name of the application
Context#mOpPackageName Package name of the application
ActivityThread.H#mCallback null
ActivityThread#mInstrumentation android.app.Instrumentation
PMS testing android.os.BinderProxy@xxxx

Package name of the sub-application for testing:com.virtualchecker

Testing

ReadValue: Context#mBasePackageName

Product Expected Value Actual Value
Android System com.virtualchecker com.virtualchecker
VirtualApp com.virtualchecker ❌ io.busniess.va
LBE com.virtualchecker ❌ com.lbe.parallel.intl.arm64
SpaceCore com.virtualchecker βœ… com.virtualchecker
360 FenShenDaShi com.virtualchecker βœ… com.virtualchecker
ShuangKaiZhuShou com.virtualchecker ❌ com.exceliance.dualaid

ReadValue: Context#mOpPackageName

Product Expected Value Actual Value
Android System com.virtualchecker com.virtualchecker
VirtualApp com.virtualchecker ❌ io.busniess.va
LBE com.virtualchecker ❌ com.lbe.parallel.intl.arm64
SpaceCore com.virtualchecker βœ… com.virtualchecker
360 FenShenDaShi com.virtualchecker βœ… com.virtualchecker
ShuangKaiZhuShou com.virtualchecker ❌ com.exceliance.dualaid

ReadValue: ActivityThread#mInstrumentation

Product Expected Value Actual Value
Android System android.app.Instrumentation@ android.app.Instrumentation@bfcc1e8
VirtualApp android.app.Instrumentation@ ❌ com.lody.virtual.client.h.a.c@fd146bf
LBE android.app.Instrumentation@ ❌ com.doubleagent.client.e@a0aac44
SpaceCore android.app.Instrumentation@ βœ… android.app.Instrumentation@153bfc9
360 FenShenDaShi android.app.Instrumentation@ ❌ com.morgoo.droidplugin.hook.handle.PluginInstrumentation@8e8d100
ShuangKaiZhuShou android.app.Instrumentation@ ❌ com.exceliance.kxqp.platform.c.b.e.wy@38e16ce

ReadValue: ActivityThread.H#mCallback

Product Expected Value Actual Value
Android System null null
VirtualApp null ❌ com.lody.virtual.client.h.d.d.b@800e4de
LBE null ❌ com.lbe.doubleagent.client.LocalActivityService$ActivityThreadCallback@3f40957
SpaceCore null ❌ com.fvbox.lib.client.hook.HCallbackHook@aa9ba7e
360 FenShenDaShi null ❌ com.morgoo.droidplugin.hook.handle.e@91b7b06
ShuangKaiZhuShou null ❌ com.excelliance.kxqp.platform.c.b.e.wr@153bfc9

PMS Testing

Product Expected Value Actual Value
Android System android.os.BinderProxy@ android.os.BinderProxy@eff05b8
VirtualApp android.os.BinderProxy@ ❌ com.lody.virtual.client.h.a.c@993b1e1
LBE android.os.BinderProxy@ ❌ com.lbe.doubleagent.client.hook.BinderProxy@f54e1fe
SpaceCore android.os.BinderProxy@ βœ… android.os.BinderProxy@c846443
360 FenShenDaShi android.os.BinderProxy@ ❌ com.morgoo.droidplugin.hook.newsolution.BinderHook$BinderWrapper@cf8d1da
ShuangKaiZhuShou android.os.BinderProxy@ βœ… android.os.BinderProxy@eff05b8

Testing Result

Product mBasePackageName mOpPackageName mInstrumentation PMS H#mCallback
VirtualApp ❌ ❌ ❌ ❌ ❌
LBE ❌ ❌ ❌ ❌ ❌
SpaceCore βœ… βœ… βœ… βœ… ❌
360 FenShenDaShi βœ… βœ… ❌ ❌ ❌
ShuangKaiZhuShou ❌ ❌ ❌ βœ… ❌

Conclusion

The test above shows that SpaceCore's invasion of the application is more conservative, reflecting sideways that the internal processing logic is better, but the specific implementation details are unknown.

Keywords:Android Virtualization, App Clone, VirtualApp, LBE, SpaceCore, 360 DroidPlugin, VMOS, Android Sandbox

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