The Problem: Mobile One

The Clue: The one true mobile app.

Summary⌗

Very common intro mobile crack-me. Decompile apk using method of choice. Search strings for flag. Get flag. Nothing to it.

This challenge could have been completed using the strings tool, but I have become used to just opening .apk’s in jadx-gui right away. Usually what I am looking for isn’t simply grep-able, so it isn’t second nature for me to grep the strings.

Steps to Solve⌗

  1. Download .apk file.
  2. Open file in jadx-gui.
  3. Open strings file.
  4. Search for string: flag
  5. Extract flag: flag{strings_grep_and_more_strings}