darkCON CTF 2021 - fire in the androiddd ( Helper ) [ RE ]

get_encryptedflag.js

Java.perform(function dump() {
  
  function sleep (time) {
  return new Promise((resolve) => setTimeout(resolve, time));
	}
	
  var api_key_class = Java.use("com.application.darkcon.data_receiver");
    

    var api_key_instance = api_key_class.$new();
    console.log("[+] instance created: " + api_key_instance);
    console.log("[+] function called : " + api_key_instance.getData());
    
sleep(5000).then(() => {
    console.log("[+] data value: " + api_key_instance.data.value);
});

});