java.lang.ClassNotFoundException when using Java.registerClass

[ali-alidoust]

I get the following error when I use Java.registerClass:
The device is an ARMv7 running Android 4.4.4

Error: java.lang.ClassNotFoundException: Didn't find class "com.example.MyRunnable" on path: DexPathList[[],nativeLibraryDirectories=[/vendor/lib, /system/lib]]', u'fileName': u'frida/node_modules/frida-java/lib/env.js', u'lineNumber': 218, u'type': u'error', u'stack': u'Error: java.lang.ClassNotFoundException: Didn't find class "com.example.MyRunnable" on path: DexPathList[[],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
    at frida/node_modules/frida-java/lib/env.js:218
    at ensureClass (frida/node_modules/frida-java/lib/class-factory.js:435)
    at frida/node_modules/frida-java/lib/class-factory.js:119
    at registerClass (frida/node_modules/frida-java/lib/class-factory.js:1637)
    at script1.js:11
    at frida/node_modules/frida-java/lib/vm.js:39
    at frida/node_modules/frida-java/index.js:281
    at script1.js:15'}

Here is the code that produces the error:

Java.perform(function() {
    var Runnable = Java.use('java.lang.Runnable');
    var MyRunnable = Java.registerClass({
        name: 'com.example.MyRunnable',
        implements: [Runnable],
        methods: {
            'run': function() {
                console.log('Hello!!!');
            }
        }
    });

    var runnable = MyRunnable.$new();
    runnable.run();
});

[oleavr]

Java.registerClass() is only supported on ART for now. Supporting this on Dalvik is not a priority for me personally, but PRs welcome!

[yehgdotnet]

Got clear answer that why objection that relies on Frida didn't work in Android 4.4 when I ran ssl pinning disable. Reverted to Xposed framework.

[yehgdotnet]

Thank you, oleavr

[WooyunDota]

I got same error on android 6.0 which is ART....
But,leavr's example "javax.net.ssl.X509TrustManager" this interface has not the problem.

[yehgdotnet]

I don't understand what you mean @WooyunDota
I tested only on Android 4 and 7. You mean this doesn't work in Android 6?

[WooyunDota]

@yehgdotnet Thank for you response.
I mean when I use "javax.net.ssl.X509TrustManager" to registerClass will success.
But,I use other interface like "java.lang.Runnable" or "javax.net.ssl.HostnameVerifier" to registerClass will fail.
The error message is Error: java.lang.ClassNotFoundException: Didn't find class ....

[yehgdotnet]

Insteresting. Maybe you root Emulator of Android 7 and try again if you dont have Android 7+ device.

[WooyunDota]

@yehgdotnet can't work too.
Attaching...
registerClass from Runnable >>>>>>>> java.lang.ClassNotFoundException: Didn't find class "com.example.MyRunnable" on path: DexPathList[[zip file "/data/data/com.example.mennomorsink.webviewtest2/cache/raw306036453dex"],nativeLibraryDirectories=[/system/lib, /vendor/lib]]
[Genymotion Google Nexus 5X - 7.0.0 - API 24 - 1080x1920::com.example.mennomorsink.webviewtest2]->

[yehgdotnet]

Can you post your sample class here. I will try with my devices.

[WooyunDota]

@yehgdotnet

Java.perform(function() {
/*failed*/
    try {
        var Runnable = Java.use('java.lang.Runnable');
        var MyRunnable = Java.registerClass({
            name: 'com.example.MyRunnable',
            implements: [Runnable],
            methods: {
                'run': function() {
                    console.log('Hello!!!');
                }
            }
        });
        // var runnable = MyRunnable.$new();
        // runnable.run();

    } catch (e) {
        console.log("registerClass error1 >>>>>>>> " + e.message);
    }
/*failed*/
    try {

        var HostnameVerifier = Java.use('javax.net.ssl.HostnameVerifier');
        TrustHostnameVerifier = Java.registerClass({
            name: 'org.wooyun.TrustHostnameVerifier',
            implements: [HostnameVerifier],
            method: {
                verify: function (hostname, session) {
                    return true;
                }
            }
        });
    } catch (e) {
        console.log("registerClass error2 >>>>>>>> " + e.message);
    }

/*successed*/
    try {
        var X509TrustManager = Java.use('javax.net.ssl.X509TrustManager');
        TrustManager = Java.registerClass({
            name: 'com.sensepost.test.TrustManager',
            implements: [X509TrustManager],
            methods: {
                checkClientTrusted: function (chain, authType) {
                },
                checkServerTrusted: function (chain, authType) {
                },
                getAcceptedIssuers: function () {
                    return [];
                }
            }
        });
    } catch (e) {
        console.log("registerClass error3 >>>>>>>> " + e.message);
    }
});