Challenges

339 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 Up
Hot Single Mom sandbox is Up	Bash Jail 1 sandbox is Up

Coding Challenges (17)

Challenges descriptions	Points	Validation	Author
Hash me please	2	2760	Mr.Un1k0d3r
Ask your grandpa!	2	1033	Mr.Un1k0d3r's Dad
Hash me reloaded	3	1547	Mr.Un1k0d3r
I hate mathematics	3	1641	Mr.Un1k0d3r
Ask your grandpa again!	4	344	Mr.Un1k0d3r's Dad
Hash breaker	4	1257	Mr.Un1k0d3r
I saw a little elf	4	458	Mr.Un1k0d3r
Hash breaker reloaded	5	735	Mr.Un1k0d3r
Execute me if you can	5	369	Mr.Un1k0d3r
Read me if you can	6	387	Mr.Un1k0d3r
Hash breaker reloaded again	6	248	Mr.Un1k0d3r
Ascii Art	6	585	Mr.Un1k0d3r
Execute me if you can again	6	184	Mr.Un1k0d3r
Xor me if you can	6	371	Mr.Un1k0d3r
Number game	7	296	Mr.Un1k0d3r remade by theindian
Classic Sudoku	7	248	Mr.Un1k0d3r remade by dread_knight
Find the right word	7	302	Mr.Un1k0d3r

Cryptography (35)

Challenges descriptions	Points	Validation	Author
Some martian message	1	5819	Mr.Un1k0d3r
You're Drunk!	1	1461	Mr.Un1k0d3r
File recovery	1	2767	Mr.Un1k0d3r
Public key recovery	2	1376	Mr.Un1k0d3r
Fashion Victim	2	442	GoSec CTF 2014
Martian message part 2	2	2497	Mr.Un1k0d3r
Can you understand this sentence?	3	613	Mr.Un1k0d3r
Let's Play Scrabble!	3	41	Madness
I Lost my password	3	1021	Mr.Un1k0d3r
Martian message part 3	3	945	Mr.Un1k0d3r
Hangovers and more: Bacon	3	476	SynneR
Crypto Leak	4	42	NSEC 2018 (Towel)
Crypto Object	4	170	GoSec CTF 2014
SSO Service	4	8	Mr.Un1k0d3r (Trustwave CTF 2020)
Crypto over the network	4	114	Mr.Un1k0d3r remade by theindian
Encrypted Zip	4	509	Mr.Un1k0d3r
Let's Play Scrabble! Part 2	5	23	Madness
Jabber	5	9	Madness
Is it a secure string?	5	233	Cedrick Chaput
Free Flag Encrypter	5	16	Towel
Pattern is the key	6	40	Mr.Un1k0d3r
Guess the number	6	7	cyberguru
Welcome to the asylum	6	52	GoSec CTF 2014
TotalSecure Message Encrypter	6	86	Towel
Jabber Part 2	7	7	Madness
Malcolm	7	7	Trustwave CTF 2020
Homemade craptography #2	7	8	HoLyVieR ft. large software company
Mars Log	8	7	NSEC 2018 (Towel)
Homemade Craptography	8	7	NSEC 2018 (HoLyVieR)
Crypto is not good as you think	8	154	Mr.Un1k0d3r
Rusty RSA message signing service	9	10	b0n0n & An0n remade by dysleixa
Spies	9	31	CS Games 2016 (HoLyVieR)
Polly Wants a Cracker	10	4	Madness
TotalSecure Message Encrypter V2	10	17	Towel
Unicorn As A Service	11	7	Towel

Exotic Data Storage (4)

Challenges descriptions	Points	Validation	Author
Just another login form	2	1407	Mr.Un1k0d3r
DON'T login as admin	2	31	mbergeron
I forgot my password	3	30	mbergeron
Inspiration	6	31	NSEC 2019 (becojo)

Forensics (28)

Challenges descriptions	Points	Validation	Author
Who I am part 2	1	510	Mr.Un1k0d3r
I made a dd of Agent Smith usb key	1	2885	Cedrick Chaput
I love cat	2	590	Mr.Un1k0d3r
Dr. Pouce	2	2153	Cedrick Chaput
Attention Dinosaure Survive	2	1177	PRL
The good, the bad and the ugly	2	85	Mr.Un1k0d3r
1 / 3 Do not waste the environment	2	922	PRL
Hide my ass in my home!	2	1388	Cedrick Chaput
Hey Chuck where is the flag?	2	1357	Mr.Un1k0d3r
Meat Loaf	2	238	Ekse
Who I am?	2	888	Mr.Un1k0d3r
The words flew but writing remains	3	153	Martin Dube
2 / 3 Did you see my desktop?	3	758	PRL
Are you Twisted Insane?	3	26	Cedrick Feat Mr.Un1k0d3r
Someone steal my flag!	3	367	Mr.Un1k0d3r
802.1X Part 1	4	56	NSEC 2015
3 / 3 Suspicious account password?	4	615	PRL
Poor internet connection	4	365	Cedrick Chaput
Agent Smith reloaded	4	242	Cedrick Chaput
R.I.P MsPaint	4	91	Misker
We got breached	5	196	Mr.Un1k0d3r
Someone steal my flag again	5	125	GoSec CTF 2014
Ping pong	5	81	SynneR
Spy my girl	5	196	Cedrick Chaput
We got breached again	6	142	Mr.Un1k0d3r
Russian Crypto Roulette	6	64	SynneR
Really Depressed Protocol	7	70	SynneR
802.1X Part 2	8	41	NSEC 2015

Jail Escaping (21)

Challenges descriptions	Points	Validation	Author
Bash Jail 1	1	2050	Mr.Un1k0d3r
Bash Jail 2	2	1314	Mr.Un1k0d3r
Bash Jail 3	3	737	Mr.Un1k0d3r
Bash Jail 4	4	400	Mr.Un1k0d3r
Bash Jail 5	6	171	Mr.Un1k0d3r
Bash Jail 6	8	22	Garigouster
Bash Jail 7	12	15	Garigouster
C Jail 1	1	332	Mr.Un1k0d3r
C Jail 2	2	217	Mr.Un1k0d3r
C Jail 3	3	180	Mr.Un1k0d3r
C Jail 4	5	16	Garigouster
C Jail 5	7	10	Garigouster
C Jail 6	14	5	Garigouster
PHP Jail 1	1	517	Mr.Un1k0d3r
PHP Jail 2	2	341	Mr.Un1k0d3r
PHP Jail 3	3	237	Mr.Un1k0d3r
PHP Jail 4	4	183	Mr.Un1k0d3r
PHP Jail 5	6	153	Mr.Un1k0d3r
PyJail 1	3	212	Martin Dube
PyJail 2	5	118	Martin Dube
PyJail 3	6	41	Martin Dube

JavaScript (10)

Challenges descriptions	Points	Validation	Author
Client side validation is bad!	1	6437	Mr.Un1k0d3r
Hashing is more secure	1	5592	Mr.Un1k0d3r
Then obfuscation is more secure	1	4252	Mr.Un1k0d3r
Most Secure Crypto Algo	2	1501	Mr.Un1k0d3r
Valid key required	2	845	Francois Lajeunesse
Why not?	2	3303	Mr.Un1k0d3r
Why not be more secure?	5	521	Mr.Un1k0d3r
WTF Lol!	6	247	HoLyVieR
Interstellar PhoneBook	6	38	NSEC 2018 (HoLyVieR)
Beauty and the beast	7	37	Mr.Un1k0d3r

Malware Analysis (17)

Challenges descriptions	Points	Validation	Author
APT 1337	4	41	NSEC 2017 (Mr.Un1k0d3r)
Capture 1 Part 1	1	578	Mr.Un1k0d3r
Capture 1 Part 2	1	193	Mr.Un1k0d3r
Capture 1 Part 3	1	213	Mr.Un1k0d3r
Capture 1 Part 4	2	26	Mr.Un1k0d3r
Capture 1 Part 5	3	50	Mr.Un1k0d3r
Capture 1 Part 6	3	135	Mr.Un1k0d3r
Capture 1 Part 7	3	26	Mr.Un1k0d3r
Capture 2 Part 1	1	53	Mr.Un1k0d3r
Capture 2 Part 2	1	96	Mr.Un1k0d3r
Capture 2 Part 3	1	96	Mr.Un1k0d3r
Capture 2 Part 4	3	95	Mr.Un1k0d3r
Capture 2 Part 5	4	34	Mr.Un1k0d3r
Capture 2 Part 6	7	14	Mr.Un1k0d3r
Just Another MBR Ransomware	8	18	Towel
RAO democracy	4	48	NSEC 2017 (Mr.Un1k0d3r)
WebShell of Hell	5	14	An0n

Pwnage Linux (21)

Challenges descriptions	Points	Validation	Author
Level1 Pwnage Linux Level Up	1	617	P-Y Feat Martin Dube
Level2 Pwnage Linux Level Up	2	384	P-Y Feat Martin Dube
Remote Auth	2	96	NSEC 2015
Level3 Pwnage Linux Level Up	3	279	P-Y Feat Martin Dube
The Vault	3	39	Mr.Un1k0d3r
Level1 Pwnage Linux x86_64	3	190	Mr.Un1k0d3r
Level2 Pwnage Linux x86_64	4	64	Mr.Un1k0d3r
Sometime there is no buffer overflow	4	70	Mr.Un1k0d3r
Can you get the service password	4	110	Mr.Un1k0d3r
Friendly race	5	21	Garigouster
Level4 Pwnage Linux Level Up	5	131	Mr.Un1k0d3r
RPCFTW!	6	33	NSEC 2015
Jack the heaper	6	18	uaf.io
Level4 Pwnage Linux x86_64	7	36	Mr.Un1k0d3r
Level3 Pwnage Linux x86_64	7	61	Mr.Un1k0d3r
Base64 As A Service	8	26	Guilt
Take over the Virtual World	8	34	NSEC 2015
Just another useless service	8	34	NSEC 2015
All You Need Is a Client	8	3	Mr.Un1k0d3r (Trustwave CTF 2020)
Base64 As A Service Reloaded	9	21	Guilt
Delivery As A Service	10	14	NSEC 2016

Reverse Engineering (54)

Challenges descriptions	Points	Validation	Author
Time to learn x86 ASM & gdb	2	1967	Mr.Un1k0d3r
Can you see through the star	2	1164	Mr.Un1k0d3r
See No Evil - Part 1	2	93	alxbl
Crack Me 1	3	742	Mr.Un1k0d3r
Heap allocator	3	262	NSEC 2015
Intro To Sparc	3	159	Ian-Kyle Wagner
See No Evil - Part 2	3	73	alxbl
Kernel introduction	3	242	Mr.Un1k0d3r
See No Evil - Part 3	3	71	alxbl
Windows x86 reversing is cool	3	674	Mr.Un1k0d3r
Introduction to MIPS	3	301	Mr.Un1k0d3r
I never forget the Nintendo 64	3	606	Mr.Un1k0d3r
See No Evil - Part 4	4	53	alxbl
Space Invaders	4	5	Trustwave CTF 2020
ASM Lovers	4	85	NSEC 2016
Altera?	4	56	NSEC 2016
I love tea!	4	12	nic-lovin
Old School	4	62	Towel
See No Evil - Part 5	4	47	alxbl
Power to the people	4	55	NSEC 2015
Let's take a detour	4	79	Floesen
Windows API for the win	4	310	Mr.Un1k0d3r
Introduction to ARM	4	338	Mr.Un1k0d3r
Wrong byte!	4	257	Mr.Un1k0d3r
Pwndr3 Authenticator	5	51	Pwndr3
WASM Part 1	5	53	NSEC 2018 (Isra17)
Phenix Golgoth	5	45	Hackfest 2016
Can I speak with the kernel?	5	65	Zerosum0x0
RingZer0 Authenticator	5	225	Ekse
The MI7 password prompt	5	52	NSEC 2018 (Mr.Un1k0d3r)
Back to our roots	5	101	Mr.Un1k0d3r
Virtual World	5	69	NSEC 2015
Smart enough?	5	106	NSEC 2015
I Think I forgot to take out the garbage!	6	18	Mr.Un1k0d3r
Update Manager	6	54	Ekse
Need a client	6	71	Mr.Un1k0d3r
Flag stealer	6	68	Ekse
Cappin'	7	1	Mr.Un1k0d3r (Trustwave CTF 2020)
SOS Lib	7	22	Mr.Un1k0d3r
Buggy Bunny	7	10	Garigouster
The supreme bash	7	22	NSEC 2017 (Mr.Un1k0d3r)
Armed and ready	7	12	NSEC 2015
Rebate As A Service	8	38	NSEC 2016
License to kill	8	3	Mr.Un1k0d3r
WASM Part 2	8	8	NSEC 2018 (Isra17)
You're not welcome	8	52	Towel
The Matrix	9	11	Towel
Keygen time again	10	30	GoSec CTF 2014
Trolling the troll	10	31	Mr.Un1k0d3r
The unknown challenge	11	16	Mr.Un1k0d3r
You're not welcome again!	12	20	Towel
WASM Part 3	12	6	NSEC 2018 (Isra17)
The oracle	13	17	Towel
Mars Reloaded	18	9	NSEC 2018 (Towel)

Shellcoding (7)

Challenges descriptions	Points	Validation	Author
Basics of Linux x64 shellcoding	2	496	Mr.Un1k0d3r
Linux x64 shellcoding level 2	4	253	Mr.Un1k0d3r
Linux x64 shellcoding level 3	6	200	Mr.Un1k0d3r
Linux x64 shellcoding level 4	8	159	Mr.Un1k0d3r
Linux x64 shellcoding level 5	10	110	Mr.Un1k0d3r
Linux x64 shellcoding level 6	12	94	Mr.Un1k0d3r
Linux x64 shellcoding level 7	14	53	Mr.Un1k0d3r

Software Defined Radio (5)

Challenges descriptions	Points	Validation	Author
SigID Level 1	1	917	Guenael
You Turn Me On And Off	3	0	Trustwave CTF 2020
Let's Get Scwhifty!	5	0	Trustwave CTF 2020
SigID Level 2	6	11	Guenael
Don't flip out, Thomas!	7	0	Trustwave CTF 2020

SQL Injection (32)

Challenges descriptions	Points	Validation	Author
Most basic SQLi pattern.	1	8150	Mr.Un1k0d3r
Random Login Form	2	1622	Mr.Un1k0d3r
Po po po po postgresql	2	1733	Mr.Un1k0d3r
Login portal 1	2	3014	Mr.Un1k0d3r
ACL rulezzz the world.	2	4064	Mart
Login portal 2	3	593	Mr.Un1k0d3r
Don't mess with Noemie; she hates admin!	3	778	Mr.Un1k0d3r
0 Day Store	3	123	NSEC 2015
What's the definition of NULL	3	659	Mr.Un1k0d3r
Don't Stumble in the Process	4	47	mbergeron
Brain Teaser 1	4	23	Sideni
Quote of the day	4	598	Mr.Un1k0d3r
No more hacking for me!	4	292	Mr.Un1k0d3r
Thinking outside the box is the key	4	500	Mr.Un1k0d3r
Quote of the day reloaded	5	231	Mr.Un1k0d3r
When it's lite it's not necessarily easy	6	207	Mr.Un1k0d3r
Login portal 3	6	237	Mr.Un1k0d3r
Hot Single Mom	6	159	GoSec CTF 2014
Internet As A Service	7	111	Mr.Un1k0d3r
Size DOES matter	7	131	Mr.Un1k0d3r
Brain Teaser 2	7	13	Sideni
/etc/passwd	7	138	Mr.Un1k0d3r
Groups of hacker	7	152	Mr.Un1k0d3r
Login portal 4	7	145	Mr.Un1k0d3r
Login portal 5	8	69	Mr.Un1k0d3r
The useless search tool	8	115	Mr.Un1k0d3r
stackoverflow.com lied to me... again	9	76	Corb3nik
Doctor Who ?	9	8	Sideni
Login portal 6	10	57	Mr.Un1k0d3r
SQHell	11	14	Sideni feat. mbergeron
Don't Stumble in the Process Reloaded	12	8	mbergeron
!Mysql + Brain fart	13	30	Mr.Un1k0d3r

Steganography (24)

Challenges descriptions	Points	Validation	Author
You're lost? Use the map	1	1512	Mr.Un1k0d3r
Victor you're hidding me something	1	2212	Cedrick Chaput
The vestige of dial-up Internet	2	100	Uid0
Pixel Everywhere	2	110	Mr.Un1k0d3r
Hidden In Plain Sight	2	599	NSEC 2015
Missing Pieces	2	697	Cedrick Chaput
Brainsick	2	775	Mr.Un1k0d3r
I'm Goronyo Babad Nigerian prince	2	499	Mr.Un1k0d3r
The Sloth	2	101	Misker
Victor reloaded	2	908	Cedrick Chaput
A ghost sound	2	745	Cedrick Chaput
Look inside the house	2	828	Mr.Un1k0d3r
Crazy Cat Lady	3	64	Madness
Can you see through the matrix!	3	133	Mr.Un1k0d3r
Love Letter	3	177	Towel
5 beautiful colors	3	40	PublicName
Your old friend Orloge Simard	3	541	Cedrick Chaput
Even the Odds	4	15	alxbl
Not just 64	4	13	Madness
Stay Classy!	4	17	Sideni
Can you see through the matrix reloaded!	4	27	Towel
Walk the line!	5	135	Cedrick Chaput
Stop the violence	5	16	jusb3
Stop the violence 2	5	6	jusb3

SysAdmin Linux (8)

Challenges descriptions	Points	Validation	Author
SysAdmin Part 1	1	2244	Cedrick Chaput
SysAdmin Part 2	1	1625	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 3	1	1013	Mr.Un1k0d3r
SysAdmin Part 4	2	964	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 5	2	604	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 6	3	571	Cedrick Chaput
SysAdmin Part 7	4	469	Cedrick Chaput
SysAdmin Part 8	4	530	Cedrick Feat Mr.Un1k0d3r

The NC8 Reverse Engineering Track (6)

Challenges descriptions	Points	Validation	Author
NC8 MAINFRAME MANAGEMENT INTERFACE Part 1	7	50	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 1	3	30	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 2	7	28	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 3	10	27	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 3	5	19	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 4	15	15	NSEC 2018 (isra17)

Web Warning (50)

Challenges descriptions	Points	Validation	Author
Looking for password file	1	3770	Mr.Un1k0d3r
Big Brother is watching	1	3636	Mr.Un1k0d3r
Area 51	1	2495	Mr.Un1k0d3r
Headache	1	3269	Mr.Un1k0d3r
Words mean something?	1	2604	Mr.Un1k0d3r
Hacking skill are optional	1	153	Breached Company
Captcha I	2	501	SynneR
Password reset	2	875	Mr.Un1k0d3r
Admin Portal	2	1095	Mr.Un1k0d3r
XSS Challenge 1	2	379	Mr.Un1k0d3r
PHP Fairy	2	753	nic-Lovin
XSS Challenge 2	2	380	Mr.Un1k0d3r
Unreadable captcha	2	351	SynneR
Security thru obscurity!	2	910	Mr.Un1k0d3r
Malicious upload	2	534	Mr.Un1k0d3r
Beyond Reality Part 1	3	23	NSEC 2019 (ldionmarcil)
UploadStar	3	14	nopernik
NeuroSoft: Observation Unit Center	3	30	NSEC 2019 (ldionmarcil)
PHP feature or 0day?	3	378	Mr.Un1k0d3r
Captcha IV	3	24	FadedForEver
REST in peace	3	200	GoSec CTF 2014
JWT pitfall 1	3	50	Mr.Un1k0d3r
XSS Challenge 3	3	173	Mr.Un1k0d3r
Looking for the flag?	3	664	Mr.Un1k0d3r
Facebook will never forget this one	3	200	Mr.Un1k0d3r
Password reset reloaded	3	331	Mr.Un1k0d3r
XSS Challenge 4	3	190	Mr.Un1k0d3r
Serial killer!	3	425	Mr.Un1k0d3r
Captcha III	4	42	mbergeron
Propaganda mail	4	218	NSEC 2015
Captcha II	4	133	SynneR
UploadStar Reloaded	5	10	nopernik
Lost API	5	23	NSEC 2019 (HoLyVieR)
The archive	5	19	NSEC 2019 (HoLyVieR)
Super Lottery	5	63	davidlebr1
Read the unreadable	5	100	Mr.Un1k0d3r
Beyond Reality Part 2	5	17	NSEC 2019 (ldionmarcil)
Password Reset As a Service	5	51	Mr.Un1k0d3r
Timesheet As a Service	5	22	Mr.Un1k0d3r
Freedom Firewall	5	104	NSEC 2015
Serial killer part 2	6	39	HoLyVieR
Orao's factory	6	103	NSEC 2015
PHP feature or 0day reloaded?	6	68	Mr.Un1k0d3r
XSS Challenge 5	6	114	Mr.Un1k0d3r
I hate this one	6	208	Mr.Un1k0d3r
XPATH of hell!	7	124	Francois L. Feat Mr.Un1k0d3r
Super Lottery Reloaded	7	18	davidlebr1 Feat mbergeron
Ping It!	7	21	mnadeau
Looking for god in your life?	8	62	NSEC 2015
Secure Mail	8	71	GoSec CTF 2014

Flag statistics (163011 submitted so far)

Number of points	Number of validation	Number of points	Number of validation
18 points	9	15 points	15
14 points	58	13 points	47
12 points	143	11 points	37
10 points	290	9 points	157
8 points	923	7 points	2094
6 points	4455	5 points	4387
4 points	9757	3 points	19339
2 points	53232	1 points	68068

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.