UMass CTF 2026 - Funny Business
My friend tells me there’s an office of a store that sells special bricks above a well-known shopping centre on this street. My friend tells me I’ll it will bring me joy, but I’m not sure that the bricks are from the famous company. Can you give me the contact email address of the store so I can learn more?
Flag format: UMASS{email@example.com}
Key clues: - “Special bricks” (possibly a LEGO alternative store) - “Above a well-known shopping centre” - “Bring me joy” (might be part of the store’s name)
Solution
By researching shopping centers in Hong Kong known for hobbyist shops, we identified Ho King Commercial Centre (好景商业中心) and Ho King Shopping Centre (好景商场) as likely locations.
Using tools like Google Gemini Deep Search to find shops selling “bricks” in these locations, we found a store associated with “Joy” (matching the “bring me joy” hint). The store in question is Joying Bricks.
Searching for their contact information lead to the official email address.