Let’s check the challenge:

This is the source code of the submitFlag:

We can see it compares with some content it gets from the new g().a(), this is the source code:

It decodes the string NF9vdmVyZG9uZV9vbWVsZXRz, let’s do it manually:

So, the flag is 4_overdone_omelets.

Another way will be to use frida, same as we did on Login.

This will be the frida script:

Java.perform(function (){
    Java.use("d.s.d.g").a.implementation = function(str1, str2){
        if(str1 == '1234' || str2 == '1234'){
            console.log("string1 is: " + str1)
            console.log("string2 is: " + str2)
            return true;
        }
        return this.a(str1, str2);
    }

    }
)