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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;
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) {
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);
}
}
}
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);
console.log('CCCryptorCreate called from:\n' + Thread.backtrace(this.context, Backtracer.FUZZY).map(DebugSymbol.fromAddress).join('\n') + '\n');
}
}
});
}
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 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);
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