# Hot Pause - BITSCTF 2025

### Category: OSINT

This challenge presented an MP4 fan-video from a concert and a question/answer bot. The first question was about the city name in which the recording was made. I did not have a clue what this concert was so I started with google image search with a frame from the video. The results were suggesting Coldplay and I sort of lucky guessed it's the song "Yellow". Sorry, I live under a stone!


I then started searching youtube for live Coldplay concerts in stadiums and found another fan-made short video with matching colours, this one was titled "Narendra Modi" which quickly led me to the city name: `AHMEDABAD`.

The next question required a specific seat from where the provided video was recorded. Knowing the stadium name I found it's seating diagram online and guessed the right spot at the 3rd attempt: `Q3`. It was possible by observing the location of entrances and where the main stage was situated.

[https://stadiumsguide.com/wp-content/uploads/2023/09/narendra-modi-stadium-seating-plan-rows-stands-982x1024.jpg](http://)

The third question was suprising, but fun. The task was to stop the video at specific moment and observe the colour of the wristbands. The question was a specific code sequence that is used to drive the color of these wristbands using e.g. a Flipper Zero. I never owned one but I quickly found a github repo where reverse engineered colour sequences are defined for pretty much all variations of colours.

[https://github.com/danielweidman/flipper-pixmob-ir-codes/blob/main/PixMob_main.ir](http://)

I initially thought it's about White, but conquering a massive brain fart I decided it has to be ... Yellow. And it worked, revealing the flag after these 3 questions.


Original writeup (https://github.com/rux-one/bitsctf-2025-hot-pause-writeup).