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hook_art.js
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const STD_STRING_SIZE = 3 * Process.pointerSize;
class StdString {
constructor() {
this.handle = Memory.alloc(STD_STRING_SIZE);
}
dispose() {
const [data, isTiny] = this._getData();
if (!isTiny) {
Java.api.$delete(data);
}
}
disposeToString() {
const result = this.toString();
this.dispose();
return result;
}
toString() {
const [data] = this._getData();
return data.readUtf8String();
}
_getData() {
const str = this.handle;
const isTiny = (str.readU8() & 1) === 0;
const data = isTiny ? str.add(1) : str.add(2 * Process.pointerSize).readPointer();
return [data, isTiny];
}
}
function prettyMethod(method_id, withSignature) {
const result = new StdString();
Java.api['art::ArtMethod::PrettyMethod'](result, method_id, withSignature ? 1 : 0);
return result.disposeToString();
}
/*
GetFieldID is at 0xe39b87c5 _ZN3art3JNI10GetFieldIDEP7_JNIEnvP7_jclassPKcS6_
GetMethodID is at 0xe39a1a19 _ZN3art3JNI11GetMethodIDEP7_JNIEnvP7_jclassPKcS6_
NewStringUTF is at 0xe39cff25 _ZN3art3JNI12NewStringUTFEP7_JNIEnvPKc
RegisterNatives is at 0xe39e08fd _ZN3art3JNI15RegisterNativesEP7_JNIEnvP7_jclassPK15JNINativeMethodi
GetStaticFieldID is at 0xe39c9635 _ZN3art3JNI16GetStaticFieldIDEP7_JNIEnvP7_jclassPKcS6_
GetStaticMethodID is at 0xe39be0ed _ZN3art3JNI17GetStaticMethodIDEP7_JNIEnvP7_jclassPKcS6_
GetStringUTFChars is at 0xe39d06e5 _ZN3art3JNI17GetStringUTFCharsEP7_JNIEnvP8_jstringPh
FindClass is at 0xe399ae5d _ZN3art3JNI9FindClassEP7_JNIEnvPKc
*/
function hook_libart() {
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 so_name = "lib"; //TODO 这里写需要过滤的so
for (var i = 0; i < symbols.length; i++) {
var symbol = symbols[i];
if (symbol.name.indexOf("art") >= 0 &&
symbol.name.indexOf("JNI") >= 0 &&
symbol.name.indexOf("CheckJNI") < 0 &&
symbol.name.indexOf("_ZN3art3JNIILb0") >= 0
) {
if (symbol.name.indexOf("GetStringUTFChars") >= 0) {
addrGetStringUTFChars = symbol.address;
console.log("GetStringUTFChars is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("NewStringUTF") >= 0) {
addrNewStringUTF = symbol.address;
console.log("NewStringUTF is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("FindClass") >= 0) {
addrFindClass = symbol.address;
console.log("FindClass is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("GetMethodID") >= 0) {
addrGetMethodID = symbol.address;
console.log("GetMethodID is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("GetStaticMethodID") >= 0) {
addrGetStaticMethodID = symbol.address;
console.log("GetStaticMethodID is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("GetFieldID") >= 0) {
addrGetFieldID = symbol.address;
console.log("GetFieldID is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("GetStaticFieldID") >= 0) {
addrGetStaticFieldID = symbol.address;
console.log("GetStaticFieldID is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("RegisterNatives") >= 0) {
addrRegisterNatives = symbol.address;
console.log("RegisterNatives is at ", symbol.address, symbol.name);
} else if (symbol.name.indexOf("CallStatic") >= 0) {
console.log("CallStatic is at ", symbol.address, symbol.name);
Interceptor.attach(symbol.address, {
onEnter: function (args) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var java_class = args[1];
var mid = args[2];
var class_name = Java.vm.tryGetEnv().getClassName(java_class);
if (class_name.indexOf("java.") == -1 && class_name.indexOf("android.") == -1) {
var method_name = prettyMethod(mid, 1);
console.log("<>CallStatic:", DebugSymbol.fromAddress(this.returnAddress), class_name, method_name);
}
}
},
onLeave: function (retval) { }
});
} else if (symbol.name.indexOf("CallNonvirtual") >= 0) {
console.log("CallNonvirtual is at ", symbol.address, symbol.name);
Interceptor.attach(symbol.address, {
onEnter: function (args) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var jobject = args[1];
var jclass = args[2];
var jmethodID = args[3];
var obj_class_name = Java.vm.tryGetEnv().getObjectClassName(jobject);
var class_name = Java.vm.tryGetEnv().getClassName(jclass);
if (class_name.indexOf("java.") == -1 && class_name.indexOf("android.") == -1) {
var method_name = prettyMethod(jmethodID, 1);
console.log("<>CallNonvirtual:", DebugSymbol.fromAddress(this.returnAddress), class_name, obj_class_name, method_name);
}
}
},
onLeave: function (retval) { }
});
} else if (symbol.name.indexOf("Call") >= 0 && symbol.name.indexOf("Method") >= 0) {
console.log("Call<>Method is at ", symbol.address, symbol.name);
Interceptor.attach(symbol.address, {
onEnter: function (args) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var java_class = args[1];
var mid = args[2];
var class_name = Java.vm.tryGetEnv().getObjectClassName(java_class);
if (class_name.indexOf("java.") == -1 && class_name.indexOf("android.") == -1) {
var method_name = prettyMethod(mid, 1);
console.log("<>Call<>Method:", DebugSymbol.fromAddress(this.returnAddress), class_name, method_name);
}
}
},
onLeave: function (retval) { }
});
}
}
}
if (addrGetStringUTFChars != null) {
Interceptor.attach(addrGetStringUTFChars, {
onEnter: function (args) {
},
onLeave: function (retval) {
if (retval != null) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var bytes = Memory.readCString(retval);
console.log("[GetStringUTFChars] result:" + bytes, DebugSymbol.fromAddress(this.returnAddress));
}
}
}
});
}
if (addrNewStringUTF != null) {
Interceptor.attach(addrNewStringUTF, {
onEnter: function (args) {
if (args[1] != null) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var string = Memory.readCString(args[1]);
console.log("[NewStringUTF] bytes:" + string, DebugSymbol.fromAddress(this.returnAddress));
}
}
},
onLeave: function (retval) { }
});
}
if (addrFindClass != null) {
Interceptor.attach(addrFindClass, {
onEnter: function (args) {
if (args[1] != null) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var name = Memory.readCString(args[1]);
console.log("[FindClass] name:" + name, DebugSymbol.fromAddress(this.returnAddress));
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetMethodID != null) {
Interceptor.attach(addrGetMethodID, {
onEnter: function (args) {
if (args[2] != null) {
var clazz = args[1];
var class_name = Java.vm.tryGetEnv().getClassName(clazz);
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetMethodID] class_name:" + class_name + " name:" + name + ", sig:" + sig, DebugSymbol.fromAddress(this.returnAddress));
} else {
console.log("[GetMethodID] class_name:" + class_name + " name:" + name, DebugSymbol.fromAddress(this.returnAddress));
}
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetStaticMethodID != null) {
Interceptor.attach(addrGetStaticMethodID, {
onEnter: function (args) {
if (args[2] != null) {
var clazz = args[1];
var class_name = Java.vm.tryGetEnv().getClassName(clazz);
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetStaticMethodID] class_name:" + class_name + " name:" + name + ", sig:" + sig, DebugSymbol.fromAddress(this.returnAddress));
} else {
console.log("[GetStaticMethodID] class_name:" + class_name + " name:" + name, DebugSymbol.fromAddress(this.returnAddress));
}
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetFieldID != null) {
Interceptor.attach(addrGetFieldID, {
onEnter: function (args) {
if (args[2] != null) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetFieldID] name:" + name + ", sig:" + sig, DebugSymbol.fromAddress(this.returnAddress));
} else {
console.log("[GetFieldID] name:" + name, DebugSymbol.fromAddress(this.returnAddress));
}
}
}
},
onLeave: function (retval) { }
});
}
if (addrGetStaticFieldID != null) {
Interceptor.attach(addrGetStaticFieldID, {
onEnter: function (args) {
if (args[2] != null) {
var module = Process.findModuleByAddress(this.returnAddress);
if (module != null && module.name.indexOf(so_name) == 0) {
var name = Memory.readCString(args[2]);
if (args[3] != null) {
var sig = Memory.readCString(args[3]);
console.log("[GetStaticFieldID] name:" + name + ", sig:" + sig, DebugSymbol.fromAddress(this.returnAddress));
} else {
console.log("[GetStaticFieldID] name:" + name, DebugSymbol.fromAddress(this.returnAddress));
}
}
}
},
onLeave: function (retval) { }
});
}
if (addrRegisterNatives != null) {
Interceptor.attach(addrRegisterNatives, {
onEnter: function (args) {
console.log("[RegisterNatives] method_count:", args[3], DebugSymbol.fromAddress(this.returnAddress));
var env = args[0];
var java_class = args[1];
var class_name = Java.vm.tryGetEnv().getClassName(java_class);
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) { }
});
}
}
setImmediate(hook_libart);