Simple-App is a 50 point Mobile challenge in the NahamCon CTF. The challenge provides the
simple-app.apk file and the description Here's a simple Android app. Can you get the flag?
The challenge is probably the easiest Mobile challenge of the event. Loading
simple-app.apk into a disassembler/decompiler, and browsing to the main activity, straight up shows the flag.
In this instance, the flag was defined as a variable in the constructor. Something as straight forward as the following
public MainActivity() {
this.flag = "flag{3asY_4ndr0id_r3vers1ng}";
}