Skip to content
master
Switch branches/tags
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 
 
 
 
 
 
 

Frida Injector for Android

is a library allowing you to inject frida agents from an Android application.

The things are very very easy:

Setup

allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}
dependencies {
        implementation 'com.github.iGio90:FridaAndroidInjector:+'
}

How to:

    try {
        // build an instance of FridaInjector providing binaries for arm/arm64/x86/x86_64 as needed
        // assets/frida-inject-12.8.2-android-arm64
        FridaInjector fridaInjector = new FridaInjector.Builder(this)
                .withArm64Injector("frida-inject-12.8.2-android-arm64")
                .build();

        // build an instance of FridaAgent
        FridaAgent fridaAgent = new FridaAgent.Builder(this)
                .withAgentFromAssets("agent.js")
                .build();

        // inject systemUi
        fridaInjector.inject(fridaAgent, "com.android.systemui", true);
    } catch (IOException e) {
        e.printStackTrace();
    }

Implementing "on('message')"

    public class MainActivity extends AppCompatActivity implements OnMessage {
        @Override
        public void onMessage(String data) {
            try {
                JSONObject object = new JSONObject(data);
                Log.e("FridaInjector", "SystemUI pid: " + object.getString("pid"));
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
    FridaAgent fridaAgent = new FridaAgent.Builder(this)
            .withAgentFromAssets("agent.js")
            .withOnMessage(this)
            .build();

and from your agent

    Java.send({'pid': Process.id});

Implementing sync interfaces

this allows to play with target objects in runtime from your java impl

public class Interfaces {
    static final class ActivityInterface implements FridaInterface {
        @Override
        public Object call(Object[] args) {
            Log.e("FridaAndroidInject", Arrays.toString(args));
            return null;
        }
    }
}
// register a custom interface
fridaAgent.registerInterface("activityInterface", Interfaces.ActivityInterface.class);

and from your agent

var app = Java.use("android.app.Activity");
app.onResume.overloads[0].implementation = function() {
    this.onResume.apply(this, arguments);
    Java.activityInterface(Java.cast(this, app), "otherArg1", "otherArg2");
};

additional

  • console.log is redirected to Log.e("FridaAndroidInject", what);

The example apk here is built and ready to try. You will see it works! (only arm64).

About

Inject frida agents on local processes through an Android app

Resources

Stars

Watchers

Forks

Packages

No packages published