In this challenge, we step into the role of an investigator tasked with tracing the steps of a missing person. A friend went on holiday in 2025 and hasn't been heard from since. Using only a handful of images and cryptic clues, we apply OSINT (Open Source Intelligence) techniques to piece together their journey.
Step 1: Initial Investigation
The challenge provides a ZIP file as the initial clue. Once extracted, it reveals just two images, which becomes the foundation of our entire investigation.
Extracting the ZIP is straightforward:
unzip <filename>.zipInside you get two images. That's it. Those two images carry the whole investigation.
What is the commercial name of this circuit?
At first glance, the image (MotoGP.jpg) clearly shows the word "PERTAMINA", which already gives us a strong hint about the location.
However, the question specifically asks for the full commercial name of the circuit, not just what's visible in the image. So we need to dig a bit deeper.
To get more precise information, I performed a reverse image search using Google Images. This technique helps us find visually similar images and often reveals additional context such as exact names, locations, or related articles.
The results returned multiple matching points to: Pertamina Mandalika International Street Circuit.
When did the event take place?
At this point, we know the location, but we still need to determine when the event took place.
Images often store metadata such as timestamps, device information, and more, this can be extracted using tools like exiftool.
To analyze the image I ran:
exiftool MotoGP.jpg
From the output we can see the following field:
Date/Time Original: 2025:10:05 which tells us that the photo was snapped on 5th October 2025.
However, the question asks for the event duration, not just a single date. Since this is a MotoGP event at Mandalika, I searched for the event schedule around this date.
The results show that the event took place from 03–05/10/2025.
Step 2: Restaurant Investigation
The next clue mentions that he ate delicious Mexican food, so we shift our focus to identifying the restaurant.
What is the name of the Mexican restaurant?
Looking closely at the image, we can actually spot the name "Cantina Mexicana" written on the table. This gives us a strong hint, but just like before we shouldn't rely solely on what's visible.
To confirm this, I performed a reverse image search on the image.
The search results point us to Cantina Mexicana Kuta Lombok.
From this we can confidently conclude that the restaurant is: Cantina Mexicana.
At what time was this photo taken?
To determine when the photo was taken, I checked the image metadata using exiftool.
exiftool food.jpg
From the output, the Date/Time Original field shows: 19:55:30.
Step 3: Tracing the After Party
The final message gives us a crucial lead:
"Went to this cool MotoGP after party, and became friends with one of the local DJs who played that night. We're going to visit a cave tomorrow."
This suggests that he attended an event linked to the MotoGP weekend, likely at a nearby bar or venue. To track this down, I searched for MotoGP after parties in Lombok around the dates which lead me to an Instagram post featuring a party event: https://www.instagram.com/reel/DOcVqWAEznb/
This post revealed the name of the venue: Surfers Bar
To get more details, I searched for the location of this bar.
From the listing, we can extract the full address: Jl. Raya Kuta, Kuta, Kec. Pujut, Kabupaten Lombok Tengah, Nusa Tenggara Bar.
What is the DJ's stage name?
The Instagram post from the after-party also reveals the name of the DJ who performed that night.
From the post, we can identify the DJ's stage name: Bong Leleh.
Step 4: Identifying the Cave
The message mentions that they planned to visit a cave the next day, which gives us a geographical clue.
What cave does he take tourists to?
Since we already know the location of the bar, a logical next step is to look for tourist attractions nearby, specifically caves. I searched for caves around the Kuta Lombok area and reviewed the results.
Given the proximity and relevance as a tourist spot, one name stood out: Gua Sumur.
Step 5: Finding the Contact Number
To find the contact number, I used the DJ's stage name as a pivot point for further investigation.
I searched for the name on Facebook.
This led me to a Facebook page associated with Gua Sumur Lombak, which appears to be linked to the same individual.
On the page, the contact number is listed as +62 853–3313–7345
Removing the country code as required gives us the answer: 085333137345.
Conclusion
This room highlights how OSINT techniques can be used to piece together information from limited data sources. By combining image analysis, metadata extraction, and social media investigation, we were able to reconstruct the subject's journey step by step.