QnQSec 2025
QnQSec CTF 2025 is an online jeopardy-style Capture The Flag competition organized by QnQSec. It features challenges across a variety of categories, including Reverse, Pwn, Cryptography, Web, Forensics, OSINT, Web3, Misc, and more.
With 50+ challenges and a total prize pool of $20,000, participants can expect a fun, competitive, and educational experience.
Team Size : Unlimted Registration opens on 10/14
Discord: https://discord.gg/q5UNp7kgWm
Sponsored by: Zellic Ottersec Offsec Google Altered Security Caido Trainsec Letsdefend ApiSec University zSecurity Rapid Risk Radar CyberSharing Parrot-CTFs Hackviser XYZ
Special thanks to all our sponsors for making this event possible.
Infra sponsored by goo.gle/ctfsponsorship
Web 10
| Challenge | Has |
|---|---|
| A_easy_web | files |
| Date_Logger | files |
| FaaS | files |
| QnQsec_portal | files |
| Secure_Letter | files |
| airspeed | files wu 1 |
| rweb | files |
| s3cr3ct_w3b | files |
| s3cr3ct_w3b_revenge | files |
| secure_letter_revenge | files |
Pwn 4
| Challenge | Has |
|---|---|
| Debtors_Database | files |
| malloc_wrapper_part_1 | files |
| malloc_wrapper_part_2 | files |
| notez | files |
Reverse 9
| Challenge | Has |
|---|---|
| Baby_Reverse_Revenge_From_NHNC | files |
| Backdoored | files |
| Bitmap | files |
| NMTE_4667 | files |
| OneShot | files |
| OneShotRevenge | files |
| Restlessness | files |
| We_re_All_to_Blame | files |
| baby_baby_reverse | files |
Crypto 9
| Challenge | Has |
|---|---|
| Connorsmith_Returns | files |
| Mandatory_RSA | files |
| Republic_of_Geese | files |
| chipmunk_telephone_receiver | files |
| ecdhaha | files |
| myLFSR | files |
| myPo1y | files |
| myPoly | files |
| myPrime | files |
Forensics 2
| Challenge | Has |
|---|---|
| Baby_Corruption | files |
| Execution | files |
Misc 8
| Challenge | Has |
|---|---|
| Catch_Me | files |
| HeartBroken | files |
| John_Cena | files |
| Laser_Strike | files |
| Rain_and_Fire | files |
| Timelock | files |
| callmeback | files |
| steg | files |
OSINT 11
| Challenge | Has |
|---|---|
| The_Bird | files |
| The_Companys_Channel_2 | files |
| The_Companys_Customer | files |
| The_Companys_Internals | files |
| The_Companys_Money | files |
| The_Companys_Script_Kiddie | files |
| The_Companys_campaign | files |
| The_Companys_channel | files |
| The_Hidden_Castle | files |
| The_company | files |
| The_picture | files |
Blockchain 2
| Challenge | Has |
|---|---|
| Broken_Vault | files |
| Vulnerable_Token | files |
Hardware 2
| Challenge | Has |
|---|---|
| Not_your_Karnaugh_diagram | files |
| SmartCoffee | files |