Challenges

316 challenges are currently available

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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	2327	Mr.Un1k0d3r
Ask your grandpa!	2	875	Mr.Un1k0d3r's Dad
Hash me reloaded	3	1317	Mr.Un1k0d3r
I hate mathematics	3	1418	Mr.Un1k0d3r
Ask your grandpa again!	4	289	Mr.Un1k0d3r's Dad
Hash breaker	4	1073	Mr.Un1k0d3r
I saw a little elf	4	384	Mr.Un1k0d3r
Hash breaker reloaded	5	640	Mr.Un1k0d3r
Execute me if you can	5	331	Mr.Un1k0d3r
Read me if you can	6	336	Mr.Un1k0d3r
Hash breaker reloaded again	6	216	Mr.Un1k0d3r
Ascii Art	6	508	Mr.Un1k0d3r
Execute me if you can again	6	166	Mr.Un1k0d3r
Xor me if you can	6	323	Mr.Un1k0d3r
Number game	7	224	Mr.Un1k0d3r remade by theindian
Classic Sudoku	7	197	Mr.Un1k0d3r remade by dread_knight
Find the right word	7	250	Mr.Un1k0d3r

Cryptography (31)

Challenges descriptions	Points	Validation	Author
Some martian message	1	4802	Mr.Un1k0d3r
You're Drunk!	1	859	Mr.Un1k0d3r
File recovery	1	2297	Mr.Un1k0d3r
Fashion Victim	2	364	GoSec CTF 2014
Public key recovery	2	1132	Mr.Un1k0d3r
Martian message part 2	2	2112	Mr.Un1k0d3r
Let's Play Scrabble!	3	19	Madness
Can you understand this sentence?	3	519	Mr.Un1k0d3r
Hangovers and more: Bacon	3	407	SynneR
Martian message part 3	3	793	Mr.Un1k0d3r
I Lost my password	3	894	Mr.Un1k0d3r
Crypto over the network	4	105	Mr.Un1k0d3r
Crypto Object	4	144	GoSec CTF 2014
Crypto Leak	4	32	NSEC 2018 (Towel)
Encrypted Zip	4	430	Mr.Un1k0d3r
Let's Play Scrabble! Part 2	5	7	Madness
Jabber	5	4	Madness
Free Flag Encrypter	5	14	Towel
Is it a secure string?	5	205	Cedrick Chaput
Pattern is the key	6	38	Mr.Un1k0d3r
TotalSecure Message Encrypter	6	73	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	1302	Mr.Un1k0d3r
DON'T login as admin	2	15	mbergeron
I forgot my password	3	15	mbergeron
Inspiration	6	21	NSEC 2019 (becojo)

Forensics (28)

Challenges descriptions	Points	Validation	Author
Who I am part 2	1	323	Mr.Un1k0d3r
I made a dd of Agent Smith usb key	1	2481	Cedrick Chaput
I love cat	2	257	Mr.Un1k0d3r
Dr. Pouce	2	1826	Cedrick Chaput
Attention Dinosaure Survive	2	992	PRL
The good, the bad and the ugly	2	61	Mr.Un1k0d3r
1 / 3 Do not waste the environment	2	785	PRL
Hide my ass in my home!	2	1199	Cedrick Chaput
Hey Chuck where is the flag?	2	1169	Mr.Un1k0d3r
Meat Loaf	2	194	Ekse
Who I am?	2	711	Mr.Un1k0d3r
The words flew but writing remains	3	125	Martin Dube
2 / 3 Did you see my desktop?	3	666	PRL
Are you Twisted Insane?	3	23	Cedrick Feat Mr.Un1k0d3r
Someone steal my flag!	3	293	Mr.Un1k0d3r
802.1X Part 1	4	46	NSEC 2015
3 / 3 Suspicious account password?	4	538	PRL
Poor internet connection	4	338	Cedrick Chaput
Agent Smith reloaded	4	204	Cedrick Chaput
R.I.P MsPaint	4	78	Misker
We got breached	5	163	Mr.Un1k0d3r
Someone steal my flag again	5	89	GoSec CTF 2014
Ping pong	5	71	SynneR
Spy my girl	5	156	Cedrick Chaput
We got breached again	6	126	Mr.Un1k0d3r
Russian Crypto Roulette	6	56	SynneR
Really Depressed Protocol	7	66	SynneR
802.1X Part 2	8	35	NSEC 2015

Jail Escaping (21)

Challenges descriptions	Points	Validation	Author
Bash Jail 1	1	1637	Mr.Un1k0d3r
Bash Jail 2	2	1062	Mr.Un1k0d3r
Bash Jail 3	3	603	Mr.Un1k0d3r
Bash Jail 4	4	335	Mr.Un1k0d3r
Bash Jail 5	6	139	Mr.Un1k0d3r
Bash Jail 6	8	17	Garigouster
Bash Jail 7	12	13	Garigouster
C Jail 1	1	271	Mr.Un1k0d3r
C Jail 2	2	180	Mr.Un1k0d3r
C Jail 3	3	148	Mr.Un1k0d3r
C Jail 4	5	13	Garigouster
C Jail 5	7	9	Garigouster
C Jail 6	14	4	Garigouster
PHP Jail 1	1	435	Mr.Un1k0d3r
PHP Jail 2	2	285	Mr.Un1k0d3r
PHP Jail 3	3	193	Mr.Un1k0d3r
PHP Jail 4	4	144	Mr.Un1k0d3r
PHP Jail 5	6	116	Mr.Un1k0d3r
PyJail 1	3	173	Martin Dube
PyJail 2	5	99	Martin Dube
PyJail 3	6	32	Martin Dube

JavaScript (10)

Challenges descriptions	Points	Validation	Author
Client side validation is bad!	1	5597	Mr.Un1k0d3r
Hashing is more secure	1	4880	Mr.Un1k0d3r
Then obfuscation is more secure	1	3677	Mr.Un1k0d3r
Most Secure Crypto Algo	2	1233	Mr.Un1k0d3r
Valid key required	2	728	Francois Lajeunesse
Why not?	2	3028	Mr.Un1k0d3r
Why not be more secure?	5	450	Mr.Un1k0d3r
WTF Lol!	6	206	HoLyVieR
Interstellar PhoneBook	6	27	NSEC 2018 (Holyvier)
Beauty and the beast	7	32	Mr.Un1k0d3r

Malware Analysis (17)

Challenges descriptions	Points	Validation	Author
APT 1337	4	30	NSEC 2017 (Mr.Un1k0d3r)
Capture 1 Part 1	1	491	Mr.Un1k0d3r
Capture 1 Part 2	1	162	Mr.Un1k0d3r
Capture 1 Part 3	1	184	Mr.Un1k0d3r
Capture 1 Part 4	2	19	Mr.Un1k0d3r
Capture 1 Part 5	3	44	Mr.Un1k0d3r
Capture 1 Part 6	3	123	Mr.Un1k0d3r
Capture 1 Part 7	3	23	Mr.Un1k0d3r
Capture 2 Part 1	1	49	Mr.Un1k0d3r
Capture 2 Part 2	1	85	Mr.Un1k0d3r
Capture 2 Part 3	1	86	Mr.Un1k0d3r
Capture 2 Part 4	3	85	Mr.Un1k0d3r
Capture 2 Part 5	4	30	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	511	P-Y Feat Martin Dube
Level2 Pwnage Linux Level Up	2	332	P-Y Feat Martin Dube
Remote Auth	2	96	NSEC 2015
Level3 Pwnage Linux Level Up	3	243	P-Y Feat Martin Dube
Level1 Pwnage Linux x86_64	3	175	Mr.Un1k0d3r
Level2 Pwnage Linux x86_64	4	59	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	114	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	32	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 (51)

Challenges descriptions	Points	Validation	Author
Time to learn x86 ASM & gdb	2	1711	Mr.Un1k0d3r
Can you see through the star	2	1032	Mr.Un1k0d3r
See No Evil - Part 1	2	16	alxbl
Crack Me 1	3	668	Mr.Un1k0d3r
Heap allocator	3	201	NSEC 2015
Kernel introduction	3	203	Mr.Un1k0d3r
Intro To Sparc	3	124	Ian-Kyle Wagner
See No Evil - Part 2	3	13	alxbl
See No Evil - Part 3	3	13	alxbl
Introduction to MIPS	3	269	Mr.Un1k0d3r
I never forget the Nintendo 64	3	542	Mr.Un1k0d3r
Windows x86 reversing is cool	3	604	Mr.Un1k0d3r
Let's take a detour	4	69	Floesen
Power to the people	4	39	NSEC 2015
See No Evil - Part 4	4	12	alxbl
See No Evil - Part 5	4	12	alxbl
Altera?	4	46	NSEC 2016
Old School	4	48	Towel
ASM Lovers	4	74	NSEC 2016
Windows API for the win	4	280	Mr.Un1k0d3r
Introduction to ARM	4	298	Mr.Un1k0d3r
Wrong byte!	4	234	Mr.Un1k0d3r
Phenix Golgoth	5	38	Hackfest 2016
The MI7 password prompt	5	42	NSEC 2018 (Mr.Un1k0d3r)
Virtual World	5	53	NSEC 2015
WASM Part 1	5	44	NSEC 2018 (Isra17)
Smart enough?	5	94	NSEC 2015
Back to our roots	5	91	Mr.Un1k0d3r
RingZer0 Authenticator	5	203	Ekse
Pwndr3 Authenticator	5	47	Pwndr3
Can I speak with the kernel?	5	53	Zerosum0x0
Need a client	6	71	Mr.Un1k0d3r
Update Manager	6	50	Ekse
I Think I forgot to take out the garbage!	6	18	Mr.Un1k0d3r
Flag stealer	6	62	Ekse
Armed and ready	7	11	NSEC 2015
Buggy Bunny	7	10	Garigouster
SOS Lib	7	22	Mr.Un1k0d3r
The supreme bash	7	18	NSEC 2017 (Mr.Un1k0d3r)
Rebate As A Service	8	35	NSEC 2016
License to kill	8	0	Mr.Un1k0d3r
WASM Part 2	8	8	NSEC 2018 (Isra17)
You're not welcome	8	47	Towel
The Matrix	9	9	Towel
Keygen time again	10	29	GoSec CTF 2014
Trolling the troll	10	30	Mr.Un1k0d3r
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	448	Mr.Un1k0d3r
Linux x64 shellcoding level 2	4	228	Mr.Un1k0d3r
Linux x64 shellcoding level 3	6	176	Mr.Un1k0d3r
Linux x64 shellcoding level 4	8	139	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	6895	Mr.Un1k0d3r
Random Login Form	2	1157	Mr.Un1k0d3r
Po po po po postgresql	2	1306	Mr.Un1k0d3r
Login portal 1	2	2586	Mr.Un1k0d3r
ACL rulezzz the world.	2	3661	Mart
Login portal 2	3	413	Mr.Un1k0d3r
Don't mess with Noemie; she hates admin!	3	594	Mr.Un1k0d3r
0 Day Store	3	106	NSEC 2015
What's the definition of NULL	3	536	Mr.Un1k0d3r
Don't Stumble in the Process	4	38	mbergeron
Brain Teaser 1	4	14	Sideni
Quote of the day	4	503	Mr.Un1k0d3r
No more hacking for me!	4	246	Mr.Un1k0d3r
Thinking outside the box is the key	4	436	Mr.Un1k0d3r
Quote of the day reloaded	5	195	Mr.Un1k0d3r
When it's lite it's not necessarily easy	6	179	Mr.Un1k0d3r
Login portal 3	6	203	Mr.Un1k0d3r
Hot Single Mom	6	134	GoSec CTF 2014
Internet As A Service	7	73	Mr.Un1k0d3r
Size DOES matter	7	123	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	124	Mr.Un1k0d3r
Login portal 5	8	67	Mr.Un1k0d3r
The useless search tool	8	110	Mr.Un1k0d3r
stackoverflow.com lied to me... again	9	63	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 (25)

Challenges descriptions	Points	Validation	Author
You're lost? Use the map	1	1231	Mr.Un1k0d3r
Victor you're hidding me something	1	1877	Cedrick Chaput
SigID Level 1	1	760	Guenael
Pixel Everywhere	2	95	Mr.Un1k0d3r
I'm Goronyo Babad Nigerian prince	2	355	Mr.Un1k0d3r
The vestige of dial-up Internet	2	64	Uid0
Missing Pieces	2	593	Cedrick Chaput
Brainsick	2	661	Mr.Un1k0d3r
Hidden In Plain Sight	2	488	NSEC 2015
The Sloth	2	85	Misker
Victor reloaded	2	797	Cedrick Chaput
A ghost sound	2	656	Cedrick Chaput
Look inside the house	2	723	Mr.Un1k0d3r
Crazy Cat Lady	3	42	Madness
Love Letter	3	150	Towel
5 beautiful colors	3	28	PublicName
Can you see through the matrix!	3	122	Mr.Un1k0d3r
Your old friend Orloge Simard	3	474	Cedrick Chaput
Not just 64	4	10	Madness
Stay Classy!	4	16	Sideni
Can you see through the matrix reloaded!	4	24	Towel
Even the Odds	4	2	alxbl
Walk the line!	5	123	Cedrick Chaput
Stop the violence	5	14	jusb3
SigID Level 2	6	7	Guenael

SysAdmin Linux (8)

Challenges descriptions	Points	Validation	Author
SysAdmin Part 1	1	1825	Cedrick Chaput
SysAdmin Part 2	1	1292	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 3	1	756	Mr.Un1k0d3r
SysAdmin Part 4	2	785	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 5	2	449	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 6	3	436	Cedrick Chaput
SysAdmin Part 7	4	345	Cedrick Chaput
SysAdmin Part 8	4	427	Cedrick Feat Mr.Un1k0d3r

The NC8 Reverse Engineering Track (6)

Challenges descriptions	Points	Validation	Author
NC8 MAINFRAME MANAGEMENT INTERFACE Part 1	7	34	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 1	3	22	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 2	7	21	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 3	10	21	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	71	Breached Company
Words mean something?	1	2159	Mr.Un1k0d3r
Headache	1	2774	Mr.Un1k0d3r
Area 51	1	2007	Mr.Un1k0d3r
Looking for password file	1	3087	Mr.Un1k0d3r
Big Brother is watching	1	3109	Mr.Un1k0d3r
Unreadable captcha	2	298	SynneR
Admin Portal	2	946	Mr.Un1k0d3r
XSS Challenge 2	2	267	Mr.Un1k0d3r
Password reset	2	763	Mr.Un1k0d3r
PHP Fairy	2	561	nic-Lovin
Captcha I	2	443	SynneR
Malicious upload	2	423	Mr.Un1k0d3r
Security thru obscurity!	2	803	Mr.Un1k0d3r
XSS Challenge 1	2	235	Mr.Un1k0d3r
JWT pitfall 1	3	16	Mr.Un1k0d3r
REST in peace	3	185	GoSec CTF 2014
PHP feature or 0day?	3	303	Mr.Un1k0d3r
Serial killer!	3	382	Mr.Un1k0d3r
Password reset reloaded	3	293	Mr.Un1k0d3r
Looking for the flag?	3	582	Mr.Un1k0d3r
XSS Challenge 3	3	139	Mr.Un1k0d3r
XSS Challenge 4	3	154	Mr.Un1k0d3r
Facebook will never forget this one	3	166	Mr.Un1k0d3r
Captcha III	4	27	mbergeron
Captcha II	4	110	SynneR
Propaganda mail	4	172	NSEC 2015
Read the unreadable	5	67	Mr.Un1k0d3r
Freedom Firewall	5	93	NSEC 2015
Super Lottery	5	36	Sparkix
Password Reset As a Service	5	36	Mr.Un1k0d3r
Timesheet As a Service	5	22	Mr.Un1k0d3r
XSS Challenge 5	6	96	Mr.Un1k0d3r
I hate this one	6	185	Mr.Un1k0d3r
PHP feature or 0day reloaded?	6	64	Mr.Un1k0d3r
Serial killer part 2	6	36	HoLyVieR
Orao's factory	6	93	NSEC 2015
XPATH of hell!	7	106	Francois L. Feat Mr.Un1k0d3r
Secure Mail	8	63	GoSec CTF 2014
Looking for god in your life?	8	57	NSEC 2015

Flag statistics (136314 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	262	9 points	137
8 points	810	7 points	1700
6 points	3848	5 points	3651
4 points	8191	3 points	16079
2 points	44691	1 points	56670

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

2019-08-07 17:16:44 - Hyperfenix m
2019-08-05 05:32:38 - behindy0uu @mbergeron be like "Injecting" png ? i try any trick, no one success
2019-07-25 14:46:51 - Towel @spamme22 No.
2019-07-22 12:56:05 - spamme22 Hacking skill are optional is actually to bruteforce?
2019-07-21 09:08:21 - code_cracker snytax for submiting flag?
2019-07-20 00:06:50 - mbergeron @simonjulianl In order to get coins, you have to submit write ups. Once the write ups are approved, you'll get your points.
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" ?

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.