🇵🇹 Senior OSINT Investigator & Tech Lead
~ Addicted to finding stuff and explaining things ~ Occasionally funny ~ https://gralhix.com & http://youtube.com/@gralhix
Smart opinions definitely my own. The other ones will be blamed on sleep deprivation.
For my 2nd challenge for @OSINT4FUN's Advent of OSINT 2025 you will need to identify the airline, make and model of the aircraft seen in the photo below.
Can you do it? 🤔
Enter your answer on OSINT4Fun's page to confirm whether you were right 🎅
Best of luck!
The answer to this OSINT challenge will reveal my favourite Christmas film of all time 😍
For one of my @OSINT4FUN's Advent calendar tasks, I wanted to add a twist. Instead of starting with an image or video, you begin with the coordinates. The problem is that these point to.. nothing..? 🤔
Enjoy and please, NO SPOILERS in the comments!
Know how to make online communities feel like home (and stay organised doing it)? Bellingcat needs a Community Operations and Project Manager to support our growing global Volunteer Community and to help run Bellingcat’s Investigative Toolkit project.
Apply here: https://www.bellingcat.com/bellingcat-jobs-careers-community-operations-project-manager/
6/6
Check out all the details of the top 2025 OSINT and CTF Advent calendar challenges which are sure to keep you busy this December:
I wish you all a great end of the year 🌟
5/6
And finally, TryHackMe returns once again with Advent of Cyber 2025.
There will be multiple ways to test your cybersecurity skills with these beginner friendly challenges. With prizes worth over $150,000 are you sure you want to miss it?
🖥️ Find them on: https://tryhackme.com/adventofcyber25
4/6
The HEX ADVENT 2025 is a Christmas themed CTF fully designed by women!
Members of the Singapore’s female cybersecurity community and female co-workers from STAR Labs created these challenges available to everyone! If you are eligible you may even win prizes.
🤶 Check it out on: https://hex-advent.starlabs.sg/
3/6
I also heard from a good source that the @Bellingcat 's open source December challenges won't be business as usual. My suggestion is to keep your eyes peeled and perhaps check out their Discord server or newsletter for tips and updates. I do love a good mystery.
🗓️ Check them out on: https://challenge.bellingcat.com/
2/6
First on my list is @OSINT4FUN 's Advent of OSINT 2025.
This project is not new to the game having already (successfully) created two previous editions of OSINT Advent calendars. This year they’re back for more!
🎄 Check them out on: https://www.osint4fun.eu/advent2025
1/6
It’s that time of the year again. As we wrap up 2025, I have compiled a list of the best OSINT and CTF Advent calendar challenges that are sure to put your skills to the test this season! 🌟
Are you ready for a busy December? 👇
The #30DayMapChallenge is an incredible project that runs every November. Participants create and share maps based on 30 different themes.
A well crafted visualisation can transform a "boring" section into something that really sticks with the reader, so I'll be checking our this year's entries for inspiration!
🕵️ The solution to OSINT Exercise 032 is now live on Youtube!
⚠️ Warning: There's some cursing involved!
✅ Did you solve it?
🖥️ Check out the video walkthrough where I explain how to complete all tasks.
🌡️Level: Beginners: Medium ~ Hard; Experts: Easy ~ Medium.
#osintchallenge
OSINT Exercise 032 is now live for everyone!
https://gralhix.com/osint-exercise-032/
This challenge is based on a short video recorded by an unknown traveller at an undisclosed airport. Despite the absolutely chaos of the footage (be warned!), it is possible to determine not just the exact date and time of the recording, but even which terminal the person was in!
The video walkthrough will be released early next week.
Enjoy! ❤️
(don't post spoilers here please)
The Centre for Information Resilience is looking for a UK-based OSINT Investigator with Arabic and/or Farsi language skills.
The closing date for this role is 9 July 2025, so there are only a few days left!
If you wish to apply please follow the instructions on the website:
https://apply.workable.com/centre-for-information-resilience/j/DE18C34E94/
"How to access geoblocked websites without a VPN"
Content restrictions are a hassle, especially in open source investigations. VPNs are great, but not always an option.
This blog post explores a simple workaround, with a couple of real world examples to try yourself 🔽
https://gralhix.com/2025/06/23/how-to-access-geoblocked-websites-without-a-vpn/
🕵️ The final walkthrough in my Back in Time series for @Bellingcat is out!
The "Toolkit Tracing" OSINT challenge focuses on the skills needed to track down documents that have been deleted, moved, or updated. The video covers several techniques useful to these situations.
🕵️Just uploaded a walkthrough for the 4th @Bellingcat's Back in Time OSINT challenge: "Future Plans".
I designed this one to show how staying organised helps tackle complex investigations with multiple pivot points.
Hope it’s helpful!
🔍 Another chance to use #OSINTforGood: @Europol has added new images to their #TraceAnObject page.
Your skills could help identify key items in child sexual abuse cases. Every clue counts!
The "Creating Community" @Bellingcat OSINT challenge walkthrough is now live! I got to explore and talk about time zones, how systems interpret them, and why they matter in investigations. Such a fascinating topic 🤓
I hope the video is fun and educational ❤️
https://youtu.be/AlrwKfcne20
🕵️ The solution to @Bellingcat 's OSINT Challenge "Training Time" is now live on Youtube!
My video walkthrough demonstrates how to solve it, from start to finish (with a few unexpected detours along the way).
Whether you have solved the challenge or not, I invite you to give it a watch.
Indoor geolocations are always fun!
https://youtu.be/jZ-rxhT5QYM
🕵️ The solution to @Bellingcat 's OSINT Challenge "Fresh Faced" is now live on Youtube!
Whether you've already completed the Fresh Faced challenge or not, I invite you to give it a watch; there is always something new to learn. In this video I explain two different methods to arrive at the correct answer, one of which relies solely on critical thinking.
