Sleuths and Sweets – irisCTF



This content originally appeared on DEV Community and was authored by David Disu

Challenge description
The description says there’s a lot of foot traffic so let’s search for a place with the most foot traffic in Japan

Foot traffic lookup
The place happens to be the shibuya crossing so let’s assume they are in shibuya since it has the highest foot traffic
Shop tag
The price tag seems unique let’s use google lens to see if there’s any dessert shop with a similar tag

Blog

Crepe wrapper lookup
These crepes both have the similar cone holder/wrappers.
The wrapper on the right reads marion crepes so lets search google maps

Crepe shop lookup google maps
Turns out there are two Marion crepes located in Shibuya
We need to find which store is closer to the crossing

Shibuya crossing location lookup
“directly outside shibuya station’s Hachiko exit.” you say?
Because the shop located in Jinnan is close by to hachiko.

Marion Crepes Shibuya lookup

Marion Crepes Shibuya lookup 2
The address is 1 Chome-21-3 Jinnan, Shibuya, Tokyo 150-0041, Japan
now just tweak to fit the flag’s format

Flag: irisctf{1_Chome_21_3_Jinnan_Shibuya}


This content originally appeared on DEV Community and was authored by David Disu