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hook_art.js
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hook_art.js
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var ishook_libart = false;
function hook_libart() {
if (ishook_libart === true) {
return;
}
var symbols = Module.enumerateSymbolsSync("libart.so");
var addrGetStringUTFChars = null;
var addrNewStringUTF = null;
var addrFindClass = null;
var addrGetMethodID = null;
var addrGetStaticMethodID = null;
var addrGetFieldID = null;
var addrGetStaticFieldID = null;
var addrRegisterNatives = null;
var addrAllocObject = null;
var addrCallObjectMethod = null;
var addrGetObjectClass = null;
var addrReleaseStringUTFChars = null;
for (var i = 0; i < symbols.length; i++) {
var symbol = symbols[i];
if (symbol.name == "_ZN3art3JNI17GetStringUTFCharsEP7_JNIEnvP8_jstringPh") {
addrGetStringUTFChars = symbol.address;
console.log("GetStringUTFChars is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI12NewStringUTFEP7_JNIEnvPKc") {
addrNewStringUTF = symbol.address;
console.log("NewStringUTF is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI9FindClassEP7_JNIEnvPKc") {
addrFindClass = symbol.address;
console.log("FindClass is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI11GetMethodIDEP7_JNIEnvP7_jclassPKcS6_") {
addrGetMethodID = symbol.address;
console.log("GetMethodID is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI17GetStaticMethodIDEP7_JNIEnvP7_jclassPKcS6_") {
addrGetStaticMethodID = symbol.address;
console.log("GetStaticMethodID is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI10GetFieldIDEP7_JNIEnvP7_jclassPKcS6_") {
addrGetFieldID = symbol.address;
console.log("GetFieldID is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI16GetStaticFieldIDEP7_JNIEnvP7_jclassPKcS6_") {
addrGetStaticFieldID = symbol.address;
console.log("GetStaticFieldID is at ", symbol.address, symbol.name);
} else if (symbol.name == "_ZN3art3JNI15RegisterNativesEP7_JNIEnvP7_jclassPK15JNINativeMethodi") {
addrRegisterNatives = symbol.address;
console.log("RegisterNatives is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("_ZN3art3JNI11AllocObjectEP7_JNIEnvP7_jclass") >= 0) {
addrAllocObject = symbol.address;
console.log("AllocObject is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("_ZN3art3JNI16CallObjectMethodEP7_JNIEnvP8_jobjectP10_jmethodIDz") >= 0) {
addrCallObjectMethod = symbol.address;
console.log("CallObjectMethod is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("_ZN3art3JNI14GetObjectClassEP7_JNIEnvP8_jobject") >= 0) {
addrGetObjectClass = symbol.address;
console.log("GetObjectClass is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("_ZN3art3JNI21ReleaseStringUTFCharsEP7_JNIEnvP8_jstringPKc") >= 0) {
addrReleaseStringUTFChars = symbol.address;
console.log("ReleaseStringUTFChars is at ", symbol.address, symbol.name);
}
}
if (addrGetStringUTFChars != null) {
Interceptor.attach(addrGetStringUTFChars, {
onEnter: function (args) { },
onLeave: function (retval) {
if (retval != null) {
var bytes = Memory.readCString(retval);
console.log("[GetStringUTFChars] result:" + bytes);
}
}
});
}
if (addrNewStringUTF != null) {
Interceptor.attach(addrNewStringUTF, {
onEnter: function (args) {
if (args[1] != null) {
var string = Memory.readCString(args[1]);
console.log("[NewStringUTF] bytes:" + string);
}
},
onLeave: function (retval) { }
});
}
if (addrFindClass != null) {
Interceptor.attach(addrFindClass, {
onEnter: function (args) {
if (args[1] != null) {
var name = Memory.readCString(args[1]);
console.log("[FindClass] name:" + name);
}
},
onLeave: function (retval) { }
});
}
if (addrGetMethodID != null) {
Interceptor.attach(addrGetMethodID, {
onEnter: function (args) {
if (args[2] != null) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetMethodID] name:" + name + ", sig:" + sig);
} else {
console.log("[GetMethodID] name:" + name);
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetStaticMethodID != null) {
Interceptor.attach(addrGetStaticMethodID, {
onEnter: function (args) {
if (args[2] != null) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetStaticMethodID] name:" + name + ", sig:" + sig);
} else {
console.log("[GetStaticMethodID] name:" + name);
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetFieldID != null) {
Interceptor.attach(addrGetFieldID, {
onEnter: function (args) {
if (args[2] != null) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetFieldID] name:" + name + ", sig:" + sig);
} else {
console.log("[GetFieldID] name:" + name);
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetStaticFieldID != null) {
Interceptor.attach(addrGetStaticFieldID, {
onEnter: function (args) {
if (args[2] != null) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetStaticFieldID] name:" + name + ", sig:" + sig);
} else {
console.log("[GetStaticFieldID] name:" + name);
}
}
},
onLeave: function (retval) { }
});
}
if (addrRegisterNatives != null) {
Interceptor.attach(addrRegisterNatives, {
onEnter: function (args) {
console.log("[RegisterNatives] method_count:", args[3]);
var env = args[0];
var java_class = args[1];
var funcAllocObject = new NativeFunction(addrAllocObject, "pointer", ["pointer", "pointer"]);
var funcGetMethodID = new NativeFunction(addrGetMethodID, "pointer", ["pointer", "pointer", "pointer", "pointer"]);
var funcCallObjectMethod = new NativeFunction(addrCallObjectMethod, "pointer", ["pointer", "pointer", "pointer"]);
var funcGetObjectClass = new NativeFunction(addrGetObjectClass, "pointer", ["pointer", "pointer"]);
var funcGetStringUTFChars = new NativeFunction(addrGetStringUTFChars, "pointer", ["pointer", "pointer", "pointer"]);
var funcReleaseStringUTFChars = new NativeFunction(addrReleaseStringUTFChars, "void", ["pointer", "pointer", "pointer"]);
var clz_obj = funcAllocObject(env, java_class);
var mid_getClass = funcGetMethodID(env, java_class, Memory.allocUtf8String("getClass"), Memory.allocUtf8String("()Ljava/lang/Class;"));
var clz_obj2 = funcCallObjectMethod(env, clz_obj, mid_getClass);
var cls = funcGetObjectClass(env, clz_obj2);
var mid_getName = funcGetMethodID(env, cls, Memory.allocUtf8String("getName"), Memory.allocUtf8String("()Ljava/lang/String;"));
var name_jstring = funcCallObjectMethod(env, clz_obj2, mid_getName);
var name_pchar = funcGetStringUTFChars(env, name_jstring, ptr(0));
var class_name = ptr(name_pchar).readCString();
funcReleaseStringUTFChars(env, name_jstring, name_pchar);
//console.log(class_name);
var methods_ptr = ptr(args[2]);
var method_count = parseInt(args[3]);
for (var i = 0; i < method_count; i++) {
var name_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3));
var sig_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3 + Process.pointerSize));
var fnPtr_ptr = Memory.readPointer(methods_ptr.add(i * Process.pointerSize * 3 + Process.pointerSize * 2));
var name = Memory.readCString(name_ptr);
var sig = Memory.readCString(sig_ptr);
var find_module = Process.findModuleByAddress(fnPtr_ptr);
console.log("[RegisterNatives] java_class:", class_name, "name:", name, "sig:", sig, "fnPtr:", fnPtr_ptr, "module_name:", find_module.name, "module_base:", find_module.base, "offset:", ptr(fnPtr_ptr).sub(find_module.base));
}
},
onLeave: function (retval) { }
});
}
ishook_libart = true;
}
hook_libart();