(A typical mobile‑app reverse‑engineering / hidden‑video CTF challenge) 1. Challenge Overview | Item | Description | |------|-------------| | Title | videohindexnxxcommobile | | Category | Mobile / Reverse Engineering / Steganography | | Provided artefacts | An Android APK ( videohindexnxxcommobile.apk ) and a short description: “Find the secret video and retrieve the flag.” | | Goal | Extract the hidden flag (usually a string like flag... ) that is embedded in a video file hidden inside the app. | Crackit.info [TESTED]
ffmpeg -i video.mp4 -vf "select=eq(n\,10)" -vframes 1 frame.png Run a QR decoder: Hindi Dubbed Download - Angry Indian Goddesses Movie
zbarimg frame.png # QR-Code: flagv1d30_h1dd3n_1n_0bfu5c473 7. The ZIP Payload – Extra Points Inside payload.zip :