Here you'll find my results from this CTF, along with writeups (if I find time to make them 😅) for the various challenges I completed during the event. This 4th edition of 404CTF ran from May 11, 2025 to June 1, 2025 (21 days total).

WARNING

The proposed solutions are not unique and remain debatable for some challenges.

TIP

If needed, all files and challenge details can be found in the official repository at the address below: https://github.com/HackademINT/404CTF-2025

A big THANK YOU to them!

Results

INFO

Unfortunately, being busy with the French Robotics Cup with my school's association, no "hardcore" CTF time this year, but I still managed to dedicate several evenings to secure a Top 100 finish again this year.

Key Figures:

• Final Position: 67th
• Total Points: 5428 points
• Challenges Solved: 38 / 83
• Total Participants (100+ points): 2893

Challenges

Difficulty Legend by Symbol:

Symbol	Difficulty	Base Points
😇	Intro	100
🙂	Easy	100
😑	Medium	200
😡	Hard	500
😈	Insane	500

List of 2025 Edition Challenges:

INFO

For solutions:

• 🔗 indicates it's available
• ⏳ indicates it's being written or planned
• 😢 indicates no writeup (challenge not solved)

Quantum Algorithms (2/3)

Status	Name	Points	Solution
✅	[😇] - Quantum Machinery	100	⏳
✅	[🙂] - Grover (1/2)	211	⏳
❌	[😑] - Grover (2/2)	488	😢

---

Digital Forensics (3/7)

Status	Name	Points	Solution
✅	[😇] - USB 51	100	⏳
❌	[😑] - Enter Your Password	100	😢
✅	[🙂] - Dockerflag	100	⏳
✅	[😇] - Forensic and Math [1/2]	100	⏳
❌	[🙂] - Forensic and Math [2/2]	100	😢
❌	[😇] - Apprentice Carver [1/2]	100	😢
❌	[😡] - Toortik Triflexation [1/2]	356	😢

---

Cryptanalysis (8/14)

Status	Name	Points	Solution
✅	[😑] - Saturn Cipher	100	⏳
✅	[🙂] - Galactic Interview	100	⏳
✅	[😇] - Distant Message	100	⏳
✅	[🙂] - R1R2	100	⏳
✅	[😑] - Abnormal Planets	211	⏳
✅	[😑] - Spacemark	244	⏳
✅	[😑] - You Spin Me Round	299	⏳
✅	[😡] - Cosmic Galactic Glasses	404	⏳
❌	[😡] - Galactic Interview 2	471	😢
❌	[😑] - Space Drift	477	😢
❌	[😡] - Cosmic Glasses Revenge	494	😢
❌	[😈] - Launch Curve	495	😢
❌	[😡] - Jupiter Cipher	496	😢
❌	[😈] - More Space	499	😢

---

Miscellaneous (3/6)

Status	Name	Points	Solution
✅	[😇] - Welcome	100	⏳
✅	[😇] - Pix2Num	100	⏳
❌	[🙂] - Space Traveller	100	😢
✅	[😇] - Privacy Policy	100	⏳
❌	[😡] - Satellization	490	😢
❌	[😈] - Binary Star [2/2]	500	😢

---

Binary Exploitation (1/12)

Status	Name	Points	Solution
✅	[😇] - Endangered Gorfou [1/3]	100	⏳
❌	[😇] - Endangered Gorfou [2/3]	100	😢
❌	[🙂] - Endangered Gorfou [3/3]	100	😢
❌	[🙂] - Spaaaaaaace	100	😢
❌	[🙂] - KerberINT Space Program	205	😢
❌	[😑] - 22 Bytes to Save the Universe	366	😢
❌	[😑] - Bounty Machine	473	😢
❌	[😑] - Space Odyssey	489	😢
❌	[😡] - Solaris	491	😢
❌	[😈] - Kalaxy	495	😢
❌	[😡] - Cosmic-Base	495	😢
❌	[😈] - Bokit	497	😢

---

Artificial Intelligence (1/4)

Status	Name	Points	Solution
✅	[😇] - Gorfoustral (1/3)	100	⏳
❌	[🙂] - Gorfoustral (2/3)	132	😢
❌	[😑] - Gorfoustral (3/3)	269	😢
❌	[😡] - Tattoo	467	😢

---

OSINT (7/11)

Status	Name	Points	Solution
❌	[😑] - Golden Satellite	100	😢
✅	[😡] - Earth Attack (1/2)	100	⏳
✅	[😑] - Vacation Time	100	⏳
✅	[🙂] - Unknown Mission	100	⏳
✅	[😇] - Salty Bill	100	⏳
✅	[🙂] - Earth Attack (0/2)	100	⏳
✅	[😑] - Pink City	100	⏳
✅	[😡] - Head in the Stars	347	⏳
❌	[😈] - Earth Attack (2/2)	400	😢
❌	[😡] - Dark Waters	464	😢
❌	[😈] - DPOsint	498	😢

---

Realistic (0/6)

Status	Name	Points	Solution
❌	[😇] - The LDAP Chronicles	100	😢
❌	[😇] - Houston, we have a problem	100	😢
❌	[😇] - Named Resolve	100	😢
❌	[🙂] - The AD Guardians	100	😢
❌	[🙂] - The GPO Mission	100	😢
❌	[🙂] - Ghost Membership	100	😢

---

Reverse Engineering (4/7)

Status	Name	Points	Solution
✅	[😇] - Cbizarre [1/2]	100	⏳
✅	[😇] - Cbizarre [2/2]	100	⏳
✅	[🙂] - Reversconstrictor	100	⏳
✅	[🙂] - 3x3cut3_m3	100	⏳
❌	[😑] - Registration	304	😢
❌	[😡] - RFC 9452 bis: IP over Rockets with Quality of Service	488	😢
❌	[😑] - Binary Star [1/2]	489	😢

---

Hardware Security (6/7)

Status	Name	Points	Solution
✅	[🙂] - Space Radio	100	⏳
✅	[🙂] - R16D4	100	⏳
✅	[😑] - What's Your Temperature?	100	⏳
✅	[😇] - Too Much IQ	100	⏳
❌	[😑] - Spatial Radio Code #1	293	😢
✅	[😑] - Unidentified Serial Bus [1/2]	356	⏳
✅	[😡] - Unidentified Serial Bus [2/2]	356	⏳

---

Web Security (3/5)

Status	Name	Points	Solution
✅	[😇] - Cheese Chess	100	⏳
✅	[🙂] - Fire Server	100	⏳
✅	[😇] - Rainbow Rocket	100	⏳
❌	[😡] - Space Fleet Command	473	😢
❌	[😑] - Sideral Noise	499	😢

Changelog

10/5/25, 9:24 PM

View All Changelog

• 845b5-Fixed UI and few problemson 10/5/25
• 857fa-Inital commiton 9/28/25

Copyright

Copyright Ownership:Léo Raclet

License under:Attribution 4.0 International (CC-BY-4.0)