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| function find_RegisterNatives(params) {
let symbols = Module.enumerateSymbolsSync("libart.so");
let addrRegisterNatives = null;
for (let i = 0; i < symbols.length; i++) {
let symbol = symbols[i];
//_ZN3art3JNI15RegisterNativesEP7_JNIEnvP7_jclassPK15JNINativeMethodi
if (symbol.name.indexOf("art") >= 0 &&
symbol.name.indexOf("JNI") >= 0 &&
symbol.name.indexOf("RegisterNatives") >= 0 &&
symbol.name.indexOf("CheckJNI") < 0) {
addrRegisterNatives = symbol.address;
console.log("RegisterNatives is at ", symbol.address, symbol.name);
hook_RegisterNatives(addrRegisterNatives)
}
}
}
function hook_RegisterNatives(addrRegisterNatives) {
if (addrRegisterNatives != null) {
Interceptor.attach(addrRegisterNatives, {
onEnter: function (args) {
console.log("[RegisterNatives] method_count:", args[3]);
let java_class = args[1];
let class_name = Java.vm.tryGetEnv().getClassName(java_class);
//console.log(class_name);
let methods_ptr = ptr(args[2]);
let method_count = parseInt(args[3]);
for (let i = 0; i < method_count; i++) {
let name_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3));
let sig_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3 + Process.pointerSize));
let fnPtr_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3 + Process.pointerSize * 2));
console.log(name_ptr,sig_ptr,fnPtr_ptr);
console.log(hexdump(sig_ptr, {length: 100, header: true, raw: true}));
let name = Memory.readCString(name_ptr);
let sig = Memory.readCString(sig_ptr);
let symbol = DebugSymbol.fromAddress(fnPtr_ptr)
if (name === "getPvKey" && sig === "()Ljava/lang/String;") {
const newSig = "(Ljava/lang/String;)Ljava/lang/String;";
const newSigBytes = Memory.alloc(newSig.length); // 为新签名分配内存
Memory.writeUtf8String(newSigBytes, newSig); // 写入新的签名到新内存
Memory.protect(sig_ptr, newSig.length, 'rw');
// 直接覆盖原来 sig_ptr 地址处的签名
Memory.writeByteArray(sig_ptr, new Array(newSig.length+1).fill(0).map((_, i) => newSig.charCodeAt(i)));
const newname = "genPvKey";
const newnameBytes = Memory.alloc(newname.length); // 为新签名分配内存
Memory.writeUtf8String(newnameBytes, newname); // 写入新的签名到新内存
Memory.protect(name_ptr, newname.length, 'rw');
// 直接覆盖原来 sig_ptr 地址处的签名
Memory.writeByteArray(name_ptr, new Array(newname.length+1).fill(0).map((_, i) => newname.charCodeAt(i)));
console.log(hexdump(sig_ptr, {length: 100, header: true, raw: true}));
console.log(`✅ Replaced signature of getPvKey with: ${newSig}`);
// sig = Memory.readCString(newSigPtr);
}
console.log("[RegisterNatives] java_class:", class_name, "name:", name, "sig:", sig, "fnPtr:", fnPtr_ptr, " fnOffset:", symbol, " callee:", DebugSymbol.fromAddress(this.returnAddress));
}
for (let i = 0; i < method_count; i++) {
let name_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3));
let sig_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3 + Process.pointerSize));
let fnPtr_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3 + Process.pointerSize * 2));
let name = Memory.readCString(name_ptr);
let sig = Memory.readCString(sig_ptr);
let symbol = DebugSymbol.fromAddress(fnPtr_ptr)
console.log("[RegisterNatives] java_class:", class_name, "name:", name, "sig:", sig, "fnPtr:", fnPtr_ptr, " fnOffset:", symbol, " callee:", DebugSymbol.fromAddress(this.returnAddress));
}
}
});
}
}
function hook(){
Java.perform(function(){
let MainActivity = Java.use("com.example.mobile03.MainActivity");
MainActivity["showAd"].implementation = function () {
console.log(`MainActivity.showAd is called`);
// this["showAd"]();
};
var File = Java.use("java.io.File");
File.$init.overload('java.io.File', 'java.lang.String').implementation = function (dir, name) {
// console.log(name);
if(name=="rabbit"){
name="swan.dex";
console.log(name);
}
// 继续执行原方法
return this.$init(dir, name);
};
var AssetManager = Java.use("android.content.res.AssetManager");
AssetManager.open.overload('java.lang.String').implementation = function (filename) {
// 获取调用栈，检查是否来自 cpdex()
console.log("open",filename);
if(filename=="rabbit"){
filename="swan";
}
// 继续执行原方法
return this.open(filename);
};
Java.choose("com.example.mobile03.MainActivity",{
onMatch:function(instance){
instance.cpdex();
},onComplete:function(){
}
});
var currentApplication = Java.use('android.app.ActivityThread').currentApplication();
var context = currentApplication.getApplicationContext();
var DexClassLoader = Java.use('dalvik.system.DexClassLoader');
var File = Java.use('java.io.File');
var dexPath = context.getDir("dex", 0).getAbsolutePath() + "/swan.dex";
console.log(context.getDir("dex", 0).getAbsolutePath());
var optimizedDir = context.getCodeCacheDir().getAbsolutePath();
var currentApplication = Java.use('android.app.ActivityThread').currentApplication();
var packageCodePath = currentApplication.getPackageCodePath().toString();
var libPath = packageCodePath + "!/lib/arm64-v8a/";
try{
var classLoader = DexClassLoader.$new(dexPath, optimizedDir, libPath, context.getClassLoader());
}
catch(e){
}
var targetClass = classLoader.loadClass("com.example.mobile03.swan");
var clazz = Java.cast(targetClass, Java.use("java.lang.Class"));
var method = clazz.getDeclaredMethod("b", Java.array("java.lang.Class", []));
var result = method.invoke(null, Java.array("java.lang.Object", []));
console.log("✅ com.example.mobile03.swan.a.b() returned: " + result);
var targetClass = classLoader.loadClass("com.example.mobile03.swan");
var clazz = Java.cast(targetClass, Java.use("java.lang.Class"));
var paramTypes = Java.array("java.lang.Class", [Java.use("java.lang.String").class]);
var method = clazz.getDeclaredMethod("genPvKey", paramTypes);
method.setAccessible(true);
var args = Java.array("java.lang.Object", [Java.use("java.lang.String").$new("test_input")]);
var result = method.invoke(null, args);
console.log("✅ genPvKey('test_input') returned: " + result);
})
}
function main(){
find_RegisterNatives();
hook();
}
setImmediate(main,500);
|
