Home - RingZer0 Online CTF

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.

I started this website in 2014 hosting everything in my garage (Picture here). If you like the website you can support us by making a donation. With those donations it will be possible to buy modern hardware and add new great stuff on the website that required more resources. You can find the list of users that contributed here.

The RingZer0 Team Online CTF is now proudly hosted using Claranet FR cloud service.

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 1000 points and you will receive your official badge and certification. 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 - 37052 players

Position	Username	Points	Gold	Last Validation
	sagefault	1475	146	2020-10-20 23:05:41
	Corb3nik	1405	2	2020-09-21 17:53:36
	jusb3	1302	0	2020-09-29 05:04:41
4	Freddrickk	1244	17	2020-10-30 00:02:53
5	Towel	1226	684	2020-10-23 23:21:21
6	mbergeron	1208	210	2020-09-10 16:44:37
7	stamparm	1201	0	2018-09-25 11:21:27
8	an0n	1129	11	2017-08-20 17:04:56
9	cyberguru	1108	2	2020-09-18 09:29:56
10	nic-lovin	1068	8	2020-09-09 17:36:04
11	HoLyVieR	1047	97	2020-02-03 13:51:17
12	dinus	1044	5	2020-08-02 02:04:58
13	alxbl	1034	74	2020-07-24 10:37:29
14	acormier	1023	95	2020-08-18 20:07:53
15	Sideni	1020	17	2020-10-24 22:40:51
16	fLink	1018	2	2019-11-13 14:37:57
17	GuilT	1009	117	2019-08-09 23:04:53
18	killer2	1005	311	2018-10-29 12:29:39
19	allfro	947	0	2020-06-21 19:17:28
20	dysleixa	894	59	2020-05-11 09:36:18
21	garigouster	872	791	2017-06-05 09:19:11
22	nopernik	832	158	2020-09-16 13:00:24
23	fffroze	779	11	2020-09-02 14:56:26
24	snowscan	778	17	2020-06-09 21:51:44
25	lolwut	777	0	2018-01-18 12:58:24
26	destiny	758	4	2020-08-23 17:18:52
27	fob	756	4	2020-10-04 18:03:47
28	yehuju	735	0	2020-09-05 04:09:06
29	becojo	723	3	2020-10-27 09:54:28
30	marcS0H	718	1	2020-05-18 23:57:34
31	theindian	702	569	2020-10-10 09:31:38
32	davidlebr1	683	105	2020-08-25 23:06:15
33	madbat2	665	0	2015-06-15 15:37:39
34	pwndre	643	42	2020-06-05 00:19:47
35	marlo	643	0	2020-09-24 01:21:59
36	turksec	639	8	2017-01-31 06:56:54
37	rootkitg	634	0	2020-06-21 20:05:30
38	lixtelnis	628	3	2020-09-26 17:12:09
39	watchdog	625	41	2020-08-30 06:58:07
40	sulliedeclat	624	1	2019-11-26 01:44:50
41	Pourliver	618	0	2020-06-29 22:29:23
42	madness	613	517	2020-02-24 16:22:49
43	Kileak	611	26	2018-02-23 15:37:57
44	dloser	603	0	2016-05-03 15:48:08
45	marcan2020	594	18	2020-10-22 22:41:01
46	tihanyin	588	93	2020-07-27 14:43:12
47	xeksec	581	1	2016-10-24 00:59:48
48	Laish	580	194	2020-09-05 16:59:28
49	FadedForEver	569	5	2020-06-16 02:29:45
50	pupsik	566	0	2020-07-30 19:46:59

Search by username

Latest challenges validations

Last validation	Challenge	User who solved it
2020-10-30 08:29:16	Serial killer!	V5November
2020-10-30 08:13:58	PHP feature or 0day?	V5November
2020-10-30 07:59:16	XSS Challenge 2	V5November
2020-10-30 07:55:22	XSS Challenge 1	V5November
2020-10-30 06:06:43	Most basic SQLi pattern.	LucasScott
2020-10-30 02:24:33	Random Login Form	weiting1608
2020-10-30 00:02:53	Classic Sudoku	Freddrickk
2020-10-29 23:15:39	Bash Jail 2	n1vel
2020-10-29 23:14:09	Who I am?	Marcel777
2020-10-29 23:09:01	Missing Pieces	Agent24-D

The latest write-up with special mention

Author	Challenge	Write-Up
patacca	UploadStar	writeup-uploadstar.txt
theindian	Guess the number	Cryptography-339-Guess the number.pdf
theindian	Polly Wants a Cracker	Cryptography-310-Polly_Wants_a_Cracker.pdf
theindian	Malcolm	Cryptography-331-Malcolm.pdf
theindian	SSO Service	Cryptography-336-SSO Service.pdf
Agent24-D	Brain Teaser 1	Challenge_273.txt
theindian	DON'T login as admin	Exotica-308-Don't_Login_Admin.pdf
theindian	Beyond Reality Part 2	Web-328-Beyond_Reality_Part_2.pdf
destiny	Beyond Reality Part 2	328_beyond_reality_part_2.txt
theindian	Beyond Reality Part 1	Web-327-Beyond_Reality_Part_1.pdf

The latest challenges added

Challenge	Points	Category
Guess the number	6	Cryptography
UploadStar Reloaded	5	Web
UploadStar	3	Web
SSO Service	4	Cryptography
Space Invaders	4	Reverse Engineering

I started this website in 2014 hosting everything in my garage. If you like the website you can support us by making a donation. With those donations it will be possible to buy modern hardware and add new great stuff on the website that required more resources. You can find the list of users that contributed here.