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RingZer0 Team Online CTF

RingZer0 Team's online CTF offers you tons of challenges designed to test and improve your hacking skills through hacking challenges. Register and get a flag for every challenge.

The RingZer0 Team Online CTF is now proudly hosted by NorthSec.

Chat / Questions / Help

You'll find all what you need in the Discord Server.

Join the Discord now!

Challenges

Currently more than 300 challenges are available over 15 categories. Have fun resolving them.

View challenges »

Register

Your first time here? First step register an account, that way you will be able to login and start solving challenges.

Want to become certified RCEH?

Super simple: get at least 70% of the total points (which is 1288 points at the moment). With this certification, you will be able to buy a RCEH token that will be available on the shop. The RingZer0 Certified Elite Hacker (RCEH) certification is a highly technical certification. Anyone holding the RCEH title is a highly skilled hacker.

Once you get your RCEH title you can proudly use the certified logo and show to the rest of the world that you successfully managed to solve several hacking challenges on the RingZer0 CTF.

Scoreboard - 52641 players

Position	Username	Points	Gold	Last Validation
901	idan97	93	0	2018-04-28 16:04:25
902	wert310	93	0	2017-06-16 09:12:37
903	origine	92	83	2022-09-03 17:24:52
904	n0dayd5	92	51	2015-04-05 19:40:56
905	euphoria_	92	0	2025-02-03 20:11:41
906	theHasyOne	92	0	2024-11-23 11:51:36
907	Tony_29	92	0	2024-05-12 05:58:30
908	anne_tuzi	92	0	2023-03-03 04:22:16
909	dia2diab	92	0	2020-10-26 06:39:16
910	aicdev	92	0	2020-01-20 06:06:15
911	bWlzaWFjemVr	92	0	2016-11-21 08:06:15
912	bibo	92	0	2015-04-22 03:29:24
913	tester_one	91	21	2025-02-27 05:12:16
914	Li0nHeart	91	14	2015-04-03 03:19:31
915	Token97	91	9	2015-10-30 19:19:46
916	ABA	91	1	2017-01-14 07:42:19
917	ali_keabo	91	1	2015-11-19 13:17:22
918	xbaby123	91	0	2022-11-16 14:34:28
919	Svieg	91	0	2018-10-30 01:31:59
920	ozpingux	91	0	2018-09-11 21:36:04
921	derekjohnvn	91	0	2018-05-11 23:26:41
922	RootByte	91	0	2017-11-15 02:51:47
923	slenderestman	91	0	2017-10-16 22:27:31
924	d.hatch75	91	0	2017-07-13 17:45:03
925	thorzwar	91	0	2016-11-12 16:47:38
926	idbmb	91	0	2015-10-06 06:42:49
927	plaNETWORK	91	0	2015-10-01 22:45:29
928	ransom85	90	36	2017-05-19 06:25:39
929	madeinqchw	90	0	2024-02-26 00:31:21
930	demeter	90	0	2023-11-14 04:21:15
931	minoid	90	0	2023-06-30 07:44:07
932	george122	90	0	2023-01-12 16:37:50
933	xalis123	90	0	2021-01-23 21:41:56
934	Frankster	90	0	2020-08-06 14:28:37
935	ninjailbreak	90	0	2019-09-11 15:05:20
936	joniel_uaas	90	0	2019-03-18 21:28:28
937	darkknight9x97	90	0	2018-08-30 10:47:15
938	CLAY	90	0	2015-11-02 04:07:57
939	kumaus	89	40	2018-06-27 17:38:57
940	star	89	6	2019-06-09 21:12:29
941	Duuude_111	89	3	2025-01-14 07:03:55
942	IllTryMyBest	89	1	2020-05-22 22:40:24
943	mimic9899	89	0	2024-03-21 08:12:28
944	Cahid	89	0	2023-07-07 13:27:21
945	Cpt_BA	89	0	2022-02-08 04:34:33
946	parvin	89	0	2021-07-09 13:25:13
947	rick	89	0	2020-11-13 19:31:17
948	8arcly	89	0	2020-02-14 17:42:54
949	Fitzou	89	0	2019-11-01 21:32:12
950	3HQ	89	0	2019-08-17 15:33:12

Search by username

Latest challenges validations

Last validation	Challenge	User who solved it
2025-09-05 09:20:06	Look inside the house	duybdhe190255
2025-09-05 08:07:46	Some martian message	MCTC_Cybersecurity
2025-09-05 07:49:34	You Turn Me On And Off	Vage
2025-09-05 07:33:04	Let's Get Scwhifty!	Vage
2025-09-05 06:08:30	NC8 MAINFRAME MANAGEMENT INTERFACE Part 4	Vage
2025-09-05 06:07:35	NC8 MAINFRAME MANAGEMENT INTERFACE Part 3	Vage
2025-09-05 06:06:58	NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 3	Vage
2025-09-05 06:06:10	NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 2	Vage
2025-09-05 06:05:09	NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 1	Vage
2025-09-05 06:03:44	NC8 MAINFRAME MANAGEMENT INTERFACE Part 1	Vage

The latest write-up with special mention

Author	Challenge	Write-Up
push0ret	I saw a little elf	push0ret-little_elf.pdf
gdenhez	This malware excels Part 1	writeup_340.pdf
transcept	PHP feature or 0day?	240-php-feature-or-0day.md
gdenhez	Just Another MBR Ransomware	writeup_272.pdf
Burton	Internet As A Service	242_Internet_As_A_Service.pdf
Burton	0 Day Store	189_0_Day_Store.pdf
gdenhez	PyJail 1	writeup_97.pdf
gdenhez	PHP Jail 4	writeup_226.pdf
gdenhez	C Jail 6	writeup_259.pdf
fyrefox	Linguistic Memory System	writeup_linguistic_memory_system.pdf

The latest challenges added

Challenge	Points	Category
Disabling the camera operator (4/4)	4	NorthSec 2025
Disabling the camera operator (3/4)	4	NorthSec 2025
Disabling the camera operator (2/4)	3	NorthSec 2025
Disabling the camera operator (1/4)	1	NorthSec 2025
Motor Sensors - Agent 3 (2/2)	4	NorthSec 2025

Charles F. Hamilton started RingZer0 website in 2014 by hosting everything in his own garage (Picture here). You can find the list of users that contributed over the years here.