b404team@ctf:~$

B404CTF
2027

Official online Jeopardy-style cyber security competition, organized by B404TEAM . 48 hours of hand-crafted challenges and a live dynamic scoreboard — team-based , up to 3 members per team.

FORMAT: Jeopardy · team-based START: 2027-08-01 · 09:00 UTC END: 2027-08-03 · 09:00 UTC
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about the event

A 48-hour raid, built by hackers, for hackers.

B404CTF 2027 is an official online cyber security competition in Jeopardy format, organized by B404TEAM . The event brings together students, cyber security enthusiasts, and security professionals to test their skills in a competitive, team-based environment with a live dynamic scoreboard. Teams can have up to 3 members .

Challenges are hand-crafted across a wide range of skill levels — from beginner-friendly warmups to advanced, real-world scenarios.

Format Online · Jeopardy
Team size Up to 3 members
Start 2027-08-01 09:00 UTC
End 2027-08-03 09:00 UTC
Duration 48 hours
Scoring Dynamic (decay)
schedule & format

Competition timeline

48 hours, one scoreboard, zero breaks.

09:00 UTC — August 1, 2027
Competition starts
The scoreboard opens and challenges become visible to every registered team.
09:00 (Aug 1) → 09:00 (Aug 3) UTC
48 hours of live challenges
Web, Pwn, Reverse Engineering, Cryptography, Forensics & OSINT, Misc — dynamic scoring throughout.
09:00 UTC — August 3, 2027
Finish & standings
The scoreboard closes. Final results are validated by the organizing team.
challenge categories

Six domains. Points that decay with every solve.

Every challenge starts at its maximum value. The more teams solve it, the more its value automatically decreases — first solves earn the most.

CAT_01 / WEB
Web Exploitation
SQLi, XSS, SSRF, auth bypasses, API security.
points 500 → 100
CAT_02 / PWN
Binary Exploitation
Buffer overflows, heap exploitation, ROP chaining.
points 500 → 100
CAT_03 / REV
Reverse Engineering
Malware analysis, binary decompilation, obfuscation.
points 500 → 100
CAT_04 / CRY
Cryptography
Classic ciphers, modern RSA/ECC attacks, custom protocols.
points 500 → 100
CAT_05 / FOR
Digital Forensics & OSINT
Memory dumps, network PCAPs, steganography.
points 500 → 100
CAT_06 / MISC
Miscellaneous
Logic puzzles, scripting, esoteric systems.
points 500 → 100
scoring & rules

cat rules.txt

rules.txt
# flag format — used across all challenges
B404CTF{s0m3_c3v3r_fl4g_h3r3}
# fair play — violations result in immediate disqualification
  • 01 Sharing flags, solutions, or hints during the competition is strictly prohibited.
  • 02 Do not attack the infrastructure or the scoreboard.
  • 03 Brute-forcing flags or challenge infrastructure is forbidden, unless explicitly permitted in a challenge's prompt.
who's behind it

B404TEAM

The crew that writes, breaks, and rebuilds every challenge before it ever reaches the scoreboard.

D4
FOUNDER & ORGANIZER
d4ck0_0
otrk/
0x
CHALLENGE AUTHOR & ORGANIZER
0x.chqrxnn
TX
TESTER
TixxyOfficial
prizes & recognition

Prizes to be announced

[ TBA ]
Prize details will be published ahead of the event — follow the official Discord for updates.
get ready

Register your team

Spots on the live scoreboard are open to teams of up to 3 members — from first steps to advanced.

> REGISTER_TEAM
$ open platform myctf.d4ck.eu.org $ join discord discord.gg/gW5qgJuByf $ mail support otrk080@gmail.com