Challenges

310 challenges are currently available

RingZer0 Team provide you couple of tools that can help you. See available tools.

Means challenge completed.

Point to write-up that worth to be reading.

Earn RingZer0Gold for each of your write-up.

You have the opportunity to submit a write up for every challenge you successfully complete. Every time your write up is approved your earn RingZer0Gold. It's possible for you to exchange this gold for hints. The main goal of this initiative is to stimulate people to submit write up and share how they solved a challenge with other people. When you finish a challenge, you have the ability to view all published write up for the challenge. This way you can learn many ways to solve a unique challenge.

Sandboxes Status

Challenges
SysAdmin Part 1 sandbox is Up	Secure Mail sandbox is Up
Looking for god in your life? sandbox is Up	XSS Challenge 1 sandbox is Up
Captcha I sandbox is Up	Propaganda mail sandbox is Up
Basics of Linux x64 shellcoding sandbox is Up	Level1 Pwnage Linux Level Up sandbox is Up
Level1 Pwnage Linux x86_64 sandbox is Up	Virtual World sandbox is Down
Hot Single Mom sandbox is Up	Bash Jail 1 sandbox is Up

Coding Challenges (17)

Challenges descriptions	Points	Validation	Author
Hash me please	2	2271	Mr.Un1k0d3r
Ask your grandpa!	2	861	Mr.Un1k0d3r's Dad
Hash me reloaded	3	1290	Mr.Un1k0d3r
I hate mathematics	3	1388	Mr.Un1k0d3r
Ask your grandpa again!	4	280	Mr.Un1k0d3r's Dad
Hash breaker	4	1049	Mr.Un1k0d3r
I saw a little elf	4	378	Mr.Un1k0d3r
Hash breaker reloaded	5	632	Mr.Un1k0d3r
Execute me if you can	5	331	Mr.Un1k0d3r
Read me if you can	6	331	Mr.Un1k0d3r
Hash breaker reloaded again	6	212	Mr.Un1k0d3r
Ascii Art	6	496	Mr.Un1k0d3r
Execute me if you can again	6	166	Mr.Un1k0d3r
Xor me if you can	6	320	Mr.Un1k0d3r
Number game	7	213	Mr.Un1k0d3r remade by theindian
Classic Sudoku	7	190	Mr.Un1k0d3r remade by dread_knight
Find the right word	7	249	Mr.Un1k0d3r

Cryptography (31)

Challenges descriptions	Points	Validation	Author
Some martian message	1	4693	Mr.Un1k0d3r
You're Drunk!	1	797	Mr.Un1k0d3r
File recovery	1	2259	Mr.Un1k0d3r
Fashion Victim	2	352	GoSec CTF 2014
Public key recovery	2	1112	Mr.Un1k0d3r
Martian message part 2	2	2077	Mr.Un1k0d3r
Let's Play Scrabble!	3	16	Madness
Can you understand this sentence?	3	511	Mr.Un1k0d3r
Hangovers and more: Bacon	3	394	SynneR
Martian message part 3	3	777	Mr.Un1k0d3r
I Lost my password	3	880	Mr.Un1k0d3r
Crypto over the network	4	105	Mr.Un1k0d3r
Crypto Object	4	140	GoSec CTF 2014
Crypto Leak	4	32	NSEC 2018 (Towel)
Encrypted Zip	4	422	Mr.Un1k0d3r
Let's Play Scrabble! Part 2	5	6	Madness
Jabber	5	4	Madness
Free Flag Encrypter	5	14	Towel
Is it a secure string?	5	204	Cedrick Chaput
Pattern is the key	6	38	Mr.Un1k0d3r
TotalSecure Message Encrypter	6	72	Towel
Welcome to the asylum	6	48	GoSec CTF 2014
Jabber Part 2	7	4	Madness
Homemade Craptography	8	5	NSEC 2018 (Holyvier)
Crypto is not good as you think	8	122	Mr.Un1k0d3r
Mars Log	8	6	NSEC 2018 (Towel)
Spies	9	28	CS Games 2016 (HoLyVieR)
Rusty RSA message signing service	9	10	b0n0n & An0n
TotalSecure Message Encrypter V2	10	16	Towel
Polly Wants a Cracker	10	2	Madness
Unicorn As A Service	11	7	Towel

Exotic Data Storage (4)

Challenges descriptions	Points	Validation	Author
Just another login form	2	1287	Mr.Un1k0d3r
DON'T login as admin	2	14	mbergeron
I forgot my password	3	14	mbergeron
Inspiration	6	20	NSEC 2019 (becojo)

Forensics (28)

Challenges descriptions	Points	Validation	Author
Who I am part 2	1	312	Mr.Un1k0d3r
I made a dd of Agent Smith usb key	1	2452	Cedrick Chaput
I love cat	2	226	Mr.Un1k0d3r
Dr. Pouce	2	1798	Cedrick Chaput
Attention Dinosaure Survive	2	973	PRL
The good, the bad and the ugly	2	59	Mr.Un1k0d3r
1 / 3 Do not waste the environment	2	774	PRL
Hide my ass in my home!	2	1180	Cedrick Chaput
Hey Chuck where is the flag?	2	1151	Mr.Un1k0d3r
Meat Loaf	2	194	Ekse
Who I am?	2	695	Mr.Un1k0d3r
The words flew but writing remains	3	123	Martin Dube
2 / 3 Did you see my desktop?	3	657	PRL
Are you Twisted Insane?	3	23	Cedrick Feat Mr.Un1k0d3r
Someone steal my flag!	3	286	Mr.Un1k0d3r
802.1X Part 1	4	44	NSEC 2015
3 / 3 Suspicious account password?	4	529	PRL
Poor internet connection	4	335	Cedrick Chaput
Agent Smith reloaded	4	200	Cedrick Chaput
R.I.P MsPaint	4	75	Misker
We got breached	5	161	Mr.Un1k0d3r
Someone steal my flag again	5	85	GoSec CTF 2014
Ping pong	5	71	SynneR
Spy my girl	5	154	Cedrick Chaput
We got breached again	6	122	Mr.Un1k0d3r
Russian Crypto Roulette	6	54	SynneR
Really Depressed Protocol	7	64	SynneR
802.1X Part 2	8	33	NSEC 2015

Jail Escaping (21)

Challenges descriptions	Points	Validation	Author
Bash Jail 1	1	1595	Mr.Un1k0d3r
Bash Jail 2	2	1036	Mr.Un1k0d3r
Bash Jail 3	3	591	Mr.Un1k0d3r
Bash Jail 4	4	330	Mr.Un1k0d3r
Bash Jail 5	6	138	Mr.Un1k0d3r
Bash Jail 6	8	17	Garigouster
Bash Jail 7	12	13	Garigouster
C Jail 1	1	264	Mr.Un1k0d3r
C Jail 2	2	174	Mr.Un1k0d3r
C Jail 3	3	143	Mr.Un1k0d3r
C Jail 4	5	13	Garigouster
C Jail 5	7	9	Garigouster
C Jail 6	14	4	Garigouster
PHP Jail 1	1	429	Mr.Un1k0d3r
PHP Jail 2	2	282	Mr.Un1k0d3r
PHP Jail 3	3	191	Mr.Un1k0d3r
PHP Jail 4	4	141	Mr.Un1k0d3r
PHP Jail 5	6	113	Mr.Un1k0d3r
PyJail 1	3	171	Martin Dube
PyJail 2	5	98	Martin Dube
PyJail 3	6	32	Martin Dube

JavaScript (10)

Challenges descriptions	Points	Validation	Author
Client side validation is bad!	1	5507	Mr.Un1k0d3r
Hashing is more secure	1	4800	Mr.Un1k0d3r
Then obfuscation is more secure	1	3612	Mr.Un1k0d3r
Most Secure Crypto Algo	2	1202	Mr.Un1k0d3r
Valid key required	2	709	Francois Lajeunesse
Why not?	2	2990	Mr.Un1k0d3r
Why not be more secure?	5	439	Mr.Un1k0d3r
WTF Lol!	6	203	HoLyVieR
Interstellar PhoneBook	6	26	NSEC 2018 (Holyvier)
Beauty and the beast	7	32	Mr.Un1k0d3r

Malware Analysis (17)

Challenges descriptions	Points	Validation	Author
APT 1337	4	27	NSEC 2017 (Mr.Un1k0d3r)
Capture 1 Part 1	1	484	Mr.Un1k0d3r
Capture 1 Part 2	1	159	Mr.Un1k0d3r
Capture 1 Part 3	1	179	Mr.Un1k0d3r
Capture 1 Part 4	2	19	Mr.Un1k0d3r
Capture 1 Part 5	3	40	Mr.Un1k0d3r
Capture 1 Part 6	3	120	Mr.Un1k0d3r
Capture 1 Part 7	3	21	Mr.Un1k0d3r
Capture 2 Part 1	1	45	Mr.Un1k0d3r
Capture 2 Part 2	1	81	Mr.Un1k0d3r
Capture 2 Part 3	1	83	Mr.Un1k0d3r
Capture 2 Part 4	3	82	Mr.Un1k0d3r
Capture 2 Part 5	4	29	Mr.Un1k0d3r
Capture 2 Part 6	7	12	Mr.Un1k0d3r
Just Another MBR Ransomware	8	13	Towel
RAO democracy	4	42	NSEC 2017 (Mr.Un1k0d3r)
WebShell of Hell	5	7	An0n

Pwnage Linux (19)

Challenges descriptions	Points	Validation	Author
Level1 Pwnage Linux Level Up	1	496	P-Y Feat Martin Dube
Level2 Pwnage Linux Level Up	2	320	P-Y Feat Martin Dube
Remote Auth	2	96	NSEC 2015
Level3 Pwnage Linux Level Up	3	237	P-Y Feat Martin Dube
Level1 Pwnage Linux x86_64	3	172	Mr.Un1k0d3r
Level2 Pwnage Linux x86_64	4	58	Mr.Un1k0d3r
Sometime there is no buffer overflow	4	70	Mr.Un1k0d3r
Can you get the service password	4	110	Mr.Un1k0d3r
Level4 Pwnage Linux Level Up	5	113	Mr.Un1k0d3r
Friendly race	5	21	Garigouster
RPCFTW!	6	25	NSEC 2015
Jack the heaper	6	18	uaf.io
Level3 Pwnage Linux x86_64	7	53	Mr.Un1k0d3r
Level4 Pwnage Linux x86_64	7	31	Mr.Un1k0d3r
Just another useless service	8	34	NSEC 2015
Take over the Virtual World	8	26	NSEC 2015
Base64 As A Service	8	26	Guilt
Base64 As A Service Reloaded	9	21	Guilt
Delivery As A Service	10	14	NSEC 2016

Reverse Engineering (46)

Challenges descriptions	Points	Validation	Author
Can you see through the star	2	1015	Mr.Un1k0d3r
Time to learn x86 ASM & gdb	2	1691	Mr.Un1k0d3r
Kernel introduction	3	197	Mr.Un1k0d3r
Intro To Sparc	3	119	Ian-Kyle Wagner
Crack Me 1	3	651	Mr.Un1k0d3r
Introduction to MIPS	3	262	Mr.Un1k0d3r
I never forget the Nintendo 64	3	527	Mr.Un1k0d3r
Heap allocator	3	200	NSEC 2015
Windows x86 reversing is cool	3	593	Mr.Un1k0d3r
Let's take a detour	4	69	Floesen
ASM Lovers	4	74	NSEC 2016
Altera?	4	46	NSEC 2016
Wrong byte!	4	231	Mr.Un1k0d3r
Power to the people	4	39	NSEC 2015
Old School	4	46	Towel
Introduction to ARM	4	290	Mr.Un1k0d3r
Windows API for the win	4	275	Mr.Un1k0d3r
Can I speak with the kernel?	5	53	Zerosum0x0
Phenix Golgoth	5	38	Hackfest 2016
The MI7 password prompt	5	40	NSEC 2018 (Mr.Un1k0d3r)
WASM Part 1	5	42	NSEC 2018 (Isra17)
Smart enough?	5	93	NSEC 2015
Virtual World	5	53	NSEC 2015
Back to our roots	5	91	Mr.Un1k0d3r
Pwndr3 Authenticator	5	47	Pwndr3
RingZer0 Authenticator	5	197	Ekse
Flag stealer	6	62	Ekse
Need a client	6	71	Mr.Un1k0d3r
I Think I forgot to take out the garbage!	6	18	Mr.Un1k0d3r
Update Manager	6	50	Ekse
Buggy Bunny	7	10	Garigouster
Armed and ready	7	11	NSEC 2015
SOS Lib	7	22	Mr.Un1k0d3r
The supreme bash	7	18	NSEC 2017 (Mr.Un1k0d3r)
WASM Part 2	8	8	NSEC 2018 (Isra17)
You're not welcome	8	46	Towel
License to kill	8	0	Mr.Un1k0d3r
Rebate As A Service	8	35	NSEC 2016
The Matrix	9	9	Towel
Trolling the troll	10	30	Mr.Un1k0d3r
Keygen time again	10	28	GoSec CTF 2014
The unknown challenge	11	15	Mr.Un1k0d3r
You're not welcome again!	12	19	Towel
WASM Part 3	12	6	NSEC 2018 (Isra17)
The oracle	13	17	Towel
Mars Reloaded	18	8	NSEC 2018 (Towel)

Shellcoding (7)

Challenges descriptions	Points	Validation	Author
Basics of Linux x64 shellcoding	2	441	Mr.Un1k0d3r
Linux x64 shellcoding level 2	4	227	Mr.Un1k0d3r
Linux x64 shellcoding level 3	6	174	Mr.Un1k0d3r
Linux x64 shellcoding level 4	8	138	Mr.Un1k0d3r
Linux x64 shellcoding level 5	10	96	Mr.Un1k0d3r
Linux x64 shellcoding level 6	12	81	Mr.Un1k0d3r
Linux x64 shellcoding level 7	14	43	Mr.Un1k0d3r

SQL Injection (32)

Challenges descriptions	Points	Validation	Author
Most basic SQLi pattern.	1	6787	Mr.Un1k0d3r
Random Login Form	2	1129	Mr.Un1k0d3r
Po po po po postgresql	2	1279	Mr.Un1k0d3r
Login portal 1	2	2560	Mr.Un1k0d3r
ACL rulezzz the world.	2	3626	Mart
Login portal 2	3	399	Mr.Un1k0d3r
Don't mess with Noemie; she hates admin!	3	585	Mr.Un1k0d3r
0 Day Store	3	106	NSEC 2015
What's the definition of NULL	3	529	Mr.Un1k0d3r
Don't Stumble in the Process	4	38	mbergeron
Brain Teaser 1	4	11	Sideni
Quote of the day	4	495	Mr.Un1k0d3r
No more hacking for me!	4	243	Mr.Un1k0d3r
Thinking outside the box is the key	4	426	Mr.Un1k0d3r
Quote of the day reloaded	5	193	Mr.Un1k0d3r
When it's lite it's not necessarily easy	6	178	Mr.Un1k0d3r
Login portal 3	6	200	Mr.Un1k0d3r
Hot Single Mom	6	133	GoSec CTF 2014
Internet As A Service	7	71	Mr.Un1k0d3r
Size DOES matter	7	122	Mr.Un1k0d3r
Brain Teaser 2	7	9	Sideni
/etc/passwd	7	126	Mr.Un1k0d3r
Groups of hacker	7	144	Mr.Un1k0d3r
Login portal 4	7	122	Mr.Un1k0d3r
Login portal 5	8	67	Mr.Un1k0d3r
The useless search tool	8	109	Mr.Un1k0d3r
stackoverflow.com lied to me... again	9	62	Corb3nik
Doctor Who ?	9	6	Sideni
Login portal 6	10	54	Mr.Un1k0d3r
SQHell	11	12	Sideni feat. mbergeron
Don't Stumble in the Process Reloaded	12	7	mbergeron
!Mysql + Brain fart	13	29	Mr.Un1k0d3r

Steganography (24)

Challenges descriptions	Points	Validation	Author
You're lost? Use the map	1	1201	Mr.Un1k0d3r
Victor you're hidding me something	1	1836	Cedrick Chaput
SigID Level 1	1	743	Guenael
Pixel Everywhere	2	94	Mr.Un1k0d3r
I'm Goronyo Babad Nigerian prince	2	338	Mr.Un1k0d3r
The vestige of dial-up Internet	2	61	Uid0
Missing Pieces	2	585	Cedrick Chaput
Brainsick	2	647	Mr.Un1k0d3r
Hidden In Plain Sight	2	481	NSEC 2015
The Sloth	2	84	Misker
Victor reloaded	2	780	Cedrick Chaput
A ghost sound	2	641	Cedrick Chaput
Look inside the house	2	713	Mr.Un1k0d3r
Crazy Cat Lady	3	39	Madness
Love Letter	3	143	Towel
5 beautiful colors	3	27	PublicName
Can you see through the matrix!	3	120	Mr.Un1k0d3r
Your old friend Orloge Simard	3	464	Cedrick Chaput
Can you see through the matrix reloaded!	4	23	Towel
Stay Classy!	4	16	Sideni
Not just 64	4	9	Madness
Walk the line!	5	120	Cedrick Chaput
Stop the violence	5	13	jusb3
SigID Level 2	6	6	Guenael

SysAdmin Linux (8)

Challenges descriptions	Points	Validation	Author
SysAdmin Part 1	1	1783	Cedrick Chaput
SysAdmin Part 2	1	1261	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 3	1	740	Mr.Un1k0d3r
SysAdmin Part 4	2	775	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 5	2	439	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 6	3	430	Cedrick Chaput
SysAdmin Part 7	4	337	Cedrick Chaput
SysAdmin Part 8	4	420	Cedrick Feat Mr.Un1k0d3r

The NC8 Reverse Engineering Track (6)

Challenges descriptions	Points	Validation	Author
NC8 MAINFRAME MANAGEMENT INTERFACE Part 1	7	33	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 1	3	21	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 2	7	20	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 3	10	19	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 3	5	16	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 4	15	14	NSEC 2018 (isra17)

Web Warning (40)

Challenges descriptions	Points	Validation	Author
Hacking skill are optional	1	69	Breached Company
Words mean something?	1	2122	Mr.Un1k0d3r
Headache	1	2737	Mr.Un1k0d3r
Area 51	1	1984	Mr.Un1k0d3r
Looking for password file	1	3054	Mr.Un1k0d3r
Big Brother is watching	1	3071	Mr.Un1k0d3r
Unreadable captcha	2	288	SynneR
Admin Portal	2	932	Mr.Un1k0d3r
XSS Challenge 2	2	256	Mr.Un1k0d3r
Password reset	2	759	Mr.Un1k0d3r
PHP Fairy	2	547	nic-Lovin
Captcha I	2	440	SynneR
Malicious upload	2	416	Mr.Un1k0d3r
Security thru obscurity!	2	788	Mr.Un1k0d3r
XSS Challenge 1	2	225	Mr.Un1k0d3r
JWT pitfall 1	3	12	Mr.Un1k0d3r
REST in peace	3	185	GoSec CTF 2014
PHP feature or 0day?	3	300	Mr.Un1k0d3r
Serial killer!	3	378	Mr.Un1k0d3r
Password reset reloaded	3	292	Mr.Un1k0d3r
Looking for the flag?	3	572	Mr.Un1k0d3r
XSS Challenge 3	3	132	Mr.Un1k0d3r
XSS Challenge 4	3	147	Mr.Un1k0d3r
Facebook will never forget this one	3	163	Mr.Un1k0d3r
Captcha III	4	24	mbergeron
Captcha II	4	110	SynneR
Propaganda mail	4	168	NSEC 2015
Read the unreadable	5	66	Mr.Un1k0d3r
Freedom Firewall	5	92	NSEC 2015
Super Lottery	5	36	Sparkix
Password Reset As a Service	5	34	Mr.Un1k0d3r
Timesheet As a Service	5	22	Mr.Un1k0d3r
XSS Challenge 5	6	95	Mr.Un1k0d3r
I hate this one	6	183	Mr.Un1k0d3r
PHP feature or 0day reloaded?	6	63	Mr.Un1k0d3r
Serial killer part 2	6	35	HoLyVieR
Orao's factory	6	93	NSEC 2015
XPATH of hell!	7	104	Francois L. Feat Mr.Un1k0d3r
Secure Mail	8	63	GoSec CTF 2014
Looking for god in your life?	8	57	NSEC 2015

Flag statistics (133788 submitted so far)

Number of points	Number of validation	Number of points	Number of validation
18 points	8	15 points	14
14 points	47	13 points	46
12 points	126	11 points	34
10 points	259	9 points	136
8 points	805	7 points	1669
6 points	3795	5 points	3599
4 points	8013	3 points	15720
2 points	43882	1 points	55635

Shoutbox Have more questions? You can join the Slack Channel https://ringzer0-slack-invite.herokuapp.com/

2019-07-15 02:08:00 - admin hi
2019-07-12 12:03:04 - simonjulianl how to get coins? i cant buy the hints
2019-07-10 09:01:42 - mbergeron @behindy0uu There aren't any. It is not uploading for real. It is only validating if your payload is malicious or not.
2019-07-08 20:09:58 - behindy0uu Hey please tell me, where location upload in challenge "Malicious Upload" ?
2019-07-06 10:54:11 - MrUddut Sa
2019-07-03 19:55:23 - Okido_Hunter i have to send the flag i found as well?
2019-07-03 19:54:50 - Okido_Hunter flag add is not working on challange PHP feature or 0-day?
2019-07-03 09:34:39 - sparkix @behindy0uu Please don't do promotion of your Youtube channel here. Thanks.
2019-07-02 11:45:37 - admin hello
2019-06-30 16:54:49 - yigitemres is "ssh ringzer0team.com:1000" reachable?

close Intercepting SSL Traffic on RingZer0team.com

If you are using Burpsuite as your proxy, you may experiment some issue regarding interception. If you got the following error unrecognized_name here is the solution. Go to the main tab on your Burp then click on options you should now see the SSL tab. In the SSL Negociation section, check "Disable Java SNI extension (requires restart)" Restart your Burp instance and you are good to go.