Solve the number APK challenge using Frida.

[cTFk1ller]

Java.perform(function() {
 
    const Verify = Java.use("io.asis.ctf2014.numdriod.Verify");
 
    console.log("\n[*] Starting PIN Brute-force, please wait.");
    Java.choose("io.asis.ctf2014.numdriod.MainActivity", {
        onMatch: function(instance) {
            for (var index = 0; index < 9999999; index++) {
                var result = Verify.isOk(instance, ""+index);
                if (result) {
                    console.log("[+] A valid password is: " + index);
                    return;
                }
            }
        },
        onComplete: function() {
            console.log("[-] Complete searching for the instance")
        }
    })
 
})