How to attack (and secure) an Android app: An introduction
Presentation: https://www.droidcon.com/2023/07/31/how-to-attack-and-secure-an-android-app-an-introduction/
CTF apk: https://github.com/badolphi/droidcon-berlin
Slides: https://github.com/badolphi/droidcon-berlin/blob/main/Presentation.pdf