SandHook
- Android ART Hook
- Native Inline Hook
Version
Chinese
与 VirtualApp 相关的商业合作请联系微信：10890
arch support
- ARM64
- ARM32(no tested)
- Thumb-2
OS
4.4(ART Runtime) - 11.0 dev-preview-1
Project Struct
- annotation
annotation api - hooklib
core lib of art hook - nativehook
lib of native hook - xposedcompat
stable implement of xposed api compat for sandhook - xposedcompat_new
annother implement of xposed api compat for sandhook(hook more fast first time) - hookers
hook plugin demo for annotation api
how to use
implementation 'com.swift.sandhook:hooklib:4.2.0'
// need for android 11
implementation 'com.swift.sandhook:nativehook:4.2.0'Annotation API
- hook method must be a static method
- first par must be this if method is not static
- method description must "same"(can be isAssignableFrom) with origin method
- backup method same with above
@HookClass(Activity.class)
//@HookReflectClass("android.app.Activity")
public class ActivityHooker {
@HookMethodBackup("onCreate")
@MethodParams(Bundle.class)
static Method onCreateBackup;
@HookMethodBackup("onPause")
static HookWrapper.HookEntity onPauseBackup;
@HookMethod("onCreate")
@MethodParams(Bundle.class)
public static void onCreate(Activity thiz, Bundle bundle) throws Throwable {
Log.e("ActivityHooker", "hooked onCreate success " + thiz);
SandHook.callOriginByBackup(onCreateBackup, thiz, bundle);
}
@HookMethod("onPause")
public static void onPause(@ThisObject Activity thiz) throws Throwable {
Log.e("ActivityHooker", "hooked onPause success " + thiz);
onPauseBackup.callOrigin(thiz);
}
}
//or like this:
@HookClass(TestClass.class)
public class NewAnnotationApiHooker {
@HookMethod("testNewHookApi")
public static void onTestNewHookApi(@ThisObject TestClass thiz, @Param("com.swift.sandhook.MainActivity") Activity activity, int a) {
Log.e("TestClassHook", "testNewHookApi been hooked");
onTestNewHookApiBackup(thiz, activity, a);
}
@HookMethodBackup("testNewHookApi")
public static void onTestNewHookApiBackup(@ThisObject TestClass thiz, @Param("com.swift.sandhook.MainActivity") Activity activity, int a) {
onTestNewHookApiBackup(thiz, activity, a);
}
}
//first set debuggable
SandHookConfig.DEBUG = BuildConfig.DEBUG;
and
//add hookers
SandHook.addHookClass(CtrHook.class, LogHooker.class, CustmizeHooker.class, ActivityHooker.class, ObjectHooker.class);
you can also use:
SanHook.public static boolean hook(Member target, Method hook, Method backup) {}if hookers is in plugin(like xposed):
provided 'com.swift.sandhook:hookannotation:4.2.0'in your plugin
if OS <= 5.1 backup method can call itself to avoid be inlining
Xposed API
Now you can use Xposed api:
We have two different implements:
//stable
implementation 'com.swift.sandhook:xposedcompat:4.2.0'
//or
//hook fast first time
implementation 'com.swift.sandhook:xposedcompat_new:4.2.0'//setup for xposed
//for xposed compat only(no need xposed comapt new)
XposedCompat.cacheDir = getCacheDir();
//for load xp module(sandvxp)
XposedCompat.context = this;
XposedCompat.classLoader = getClassLoader();
XposedCompat.isFirstApplication= true;
//do hook
XposedHelpers.findAndHookMethod(Activity.class, "onResume", new XC_MethodHook() {
@Override
protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
super.beforeHookedMethod(param);
Log.e("XposedCompat", "beforeHookedMethod: " + param.method.getName());
}
@Override
protected void afterHookedMethod(MethodHookParam param) throws Throwable {
super.afterHookedMethod(param);
Log.e("XposedCompat", "afterHookedMethod: " + param.method.getName());
}
});Notice
Disable Inline
JIT inline
We can do nothing to prevent some methods been inlined before app start, but we can try to disable VM Jit Inline after launch.
if you will hook some method that could be inlined, please call SandHook.disableVMInline()(OS >= 7.0) in Application.OnCreate()
Inline by dex2oat
Background dex2oat
SandHook.tryDisableProfile(getPackageName());
dex2oat by DexClassLoader
SandHook.disableDex2oatInline(fullyDisableDex2oat);
or
ArtDexOptimizer.dexoatAndDisableInline to dex2oat manuly
Deoptimize(Boot Image)
You can also deoptimize a caller that inlined your hook method by SandHook.deCompile(caller), just implement >= 7.0
Hidden API
SandHook.passApiCheck();
To bypass hidden api on P & Q
Debuggable
You must set debuggble of the target hook process before init when OS >= 8.0.
SandHookConfig.DEBUG =
Native Hook
simple hook(no backup)
#include "includes/sandhook.h"
bool nativeHookNoBackup(void* origin, void* hook);
need backup origin method
#include "sandhook_native.h"
void* SandInlineHook(void* origin, void* replace);
void* SandInlineHookSym(const char* so, const char* symb, void* replace);
return is backup method
break point
you can insert a break point in body of method(not only start of method), so you can read/write registers in break point.
bool SandBreakPoint(void* origin, void (*callback)(REG[]));
bool SandSingleInstBreakPoint(void *origin, BreakCallback(callback));
short method
#include "sandhook_native.h"
void* SandSingleInstHook(void* origin, void* replace);
void* SandSingleInstHookSym(const char* so, const char* symb, void* replace);
use it when your method is <= 16bytes(64bit)/8bytes(32bit)
SandSingleInstHook only need 4bytes length
more
- disassembler (only implement important instructions)
- assembler (only implement important instructions)
Demo
SandVXPosed
non-Root Xposed Environment Demo (VirtualApp with SandHook):
https://github.com/ganyao114/SandVXposed
EdXposed(SandHook Brunch)
Unofficial xposed framework >= 8.0
See release above
https://github.com/ElderDrivers/EdXposed
Android Q(10.0)
in MyApp.java
//if you want test Android Q, please set true, because SDK_INT of Android Q is still 28 public final static boolean testAndroidQ = false;