DIVER OSINT CTF 2026 "sunny_saturday" Writeup
Table of Contents
This article was automatically translated from Japanese by AI.
Challenge
DIVER OSINT CTF 2026 “sunny_saturday”
Solution
The poster visible on the wall of Ginza Sony Park from the beginning of the video was for the 100.80.60. exhibition, which ran from April 24 to May 31, 2026, but this date range was not enough to pinpoint the filming date. People were visible on the expressway, so I searched for terms such as 銀座 高速道路 イベント. This led me to Roof Park Fes & Walk 2026, which was held on Saturday, April 25, and Sunday, April 26, 2026. Combined with the challenge’s condition that the video was filmed on a Saturday, this places the filming date on April 25, 2026.
The clock visible around eight seconds into the video and the brightness of the scene also indicated a time of around 16:14–16:15.
Flag
Diver26{2026-04-25_16:15}