Challenges

348 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 Down
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	2979	Mr.Un1k0d3r
Ask your grandpa!	2	1104	Mr.Un1k0d3r's Dad
Hash me reloaded	3	1646	Mr.Un1k0d3r
I hate mathematics	3	1739	Mr.Un1k0d3r
Ask your grandpa again!	4	369	Mr.Un1k0d3r's Dad
Hash breaker	4	1339	Mr.Un1k0d3r
I saw a little elf	4	486	Mr.Un1k0d3r
Hash breaker reloaded	5	777	Mr.Un1k0d3r
Execute me if you can	5	385	Mr.Un1k0d3r
Read me if you can	6	414	Mr.Un1k0d3r
Hash breaker reloaded again	6	263	Mr.Un1k0d3r
Ascii Art	6	619	Mr.Un1k0d3r
Execute me if you can again	6	193	Mr.Un1k0d3r
Xor me if you can	6	389	Mr.Un1k0d3r
Number game	7	313	Mr.Un1k0d3r remade by theindian
Classic Sudoku	7	262	Mr.Un1k0d3r remade by dread_knight
Find the right word	7	325	Mr.Un1k0d3r

Cryptography (36)

Challenges descriptions	Points	Validation	Author
Some martian message	1	6308	Mr.Un1k0d3r
You're Drunk!	1	1752	Mr.Un1k0d3r
File recovery	1	2970	Mr.Un1k0d3r
Fashion Victim	2	481	GoSec CTF 2014
Public key recovery	2	1458	Mr.Un1k0d3r
Martian message part 2	2	2656	Mr.Un1k0d3r
Let's Play Scrabble!	3	45	Madness
Can you understand this sentence?	3	650	Mr.Un1k0d3r
Hangovers and more: Bacon	3	513	SynneR
Martian message part 3	3	1013	Mr.Un1k0d3r
I Lost my password	3	1074	Mr.Un1k0d3r
Crypto over the network	4	125	Mr.Un1k0d3r remade by theindian
Encrypted Zip	4	536	Mr.Un1k0d3r
Crypto Object	4	180	GoSec CTF 2014
Crypto Leak	4	44	NSEC 2018 (Towel)
SSO Service	4	17	Mr.Un1k0d3r (Trustwave CTF 2020)
Jabber	5	9	Madness
Free Flag Encrypter	5	17	Towel
Let's Play Scrabble! Part 2	5	24	Madness
Is it a secure string?	5	244	Cedrick Chaput
Guess the number	6	18	cyberguru
TotalSecure Message Encrypter	6	90	Towel
Pattern is the key	6	43	Mr.Un1k0d3r
Welcome to the asylum	6	56	GoSec CTF 2014
Jabber Part 2	7	8	Madness
Malcolm	7	19	Trustwave CTF 2020
Homemade craptography #2	7	10	HoLyVieR ft. large software company
Mars Log	8	9	NSEC 2018 (Towel)
Crypto is not good as you think	8	167	Mr.Un1k0d3r
Homemade Craptography	8	9	NSEC 2018 (HoLyVieR)
Rusty RSA message signing service	9	14	b0n0n & An0n remade by dysleixa
Spies	9	32	CS Games 2016 (HoLyVieR)
Find your path	9	9	cyberguru
Polly Wants a Cracker	10	6	Madness
TotalSecure Message Encrypter V2	10	18	Towel
Unicorn As A Service	11	9	Towel

Exotic Data Storage (4)

Challenges descriptions	Points	Validation	Author
Just another login form	2	1434	Mr.Un1k0d3r
DON'T login as admin	2	33	mbergeron
I forgot my password	3	31	mbergeron
Inspiration	6	34	NSEC 2019 (becojo)

Forensics (28)

Challenges descriptions	Points	Validation	Author
Who I am part 2	1	616	Mr.Un1k0d3r
I made a dd of Agent Smith usb key	1	3084	Cedrick Chaput
I love cat	2	701	Mr.Un1k0d3r
Dr. Pouce	2	2263	Cedrick Chaput
Attention Dinosaure Survive	2	1278	PRL
The good, the bad and the ugly	2	120	Mr.Un1k0d3r
1 / 3 Do not waste the environment	2	966	PRL
Hide my ass in my home!	2	1482	Cedrick Chaput
Hey Chuck where is the flag?	2	1460	Mr.Un1k0d3r
Meat Loaf	2	279	Ekse
Who I am?	2	955	Mr.Un1k0d3r
The words flew but writing remains	3	158	Martin Dube
2 / 3 Did you see my desktop?	3	785	PRL
Are you Twisted Insane?	3	26	Cedrick Feat Mr.Un1k0d3r
Someone steal my flag!	3	393	Mr.Un1k0d3r
802.1X Part 1	4	62	NSEC 2015
3 / 3 Suspicious account password?	4	643	PRL
Poor internet connection	4	381	Cedrick Chaput
Agent Smith reloaded	4	250	Cedrick Chaput
R.I.P MsPaint	4	99	Misker
We got breached	5	207	Mr.Un1k0d3r
Someone steal my flag again	5	135	GoSec CTF 2014
Ping pong	5	85	SynneR
Spy my girl	5	204	Cedrick Chaput
We got breached again	6	148	Mr.Un1k0d3r
Russian Crypto Roulette	6	67	SynneR
Really Depressed Protocol	7	73	SynneR
802.1X Part 2	8	44	NSEC 2015

Jail Escaping (21)

Challenges descriptions	Points	Validation	Author
Bash Jail 1	1	2223	Mr.Un1k0d3r
Bash Jail 2	2	1418	Mr.Un1k0d3r
Bash Jail 3	3	804	Mr.Un1k0d3r
Bash Jail 4	4	432	Mr.Un1k0d3r
Bash Jail 5	6	186	Mr.Un1k0d3r
Bash Jail 6	8	27	Garigouster
Bash Jail 7	12	15	Garigouster
C Jail 1	1	358	Mr.Un1k0d3r
C Jail 2	2	231	Mr.Un1k0d3r
C Jail 3	3	191	Mr.Un1k0d3r
C Jail 4	5	20	Garigouster
C Jail 5	7	11	Garigouster
C Jail 6	14	7	Garigouster
PHP Jail 1	1	548	Mr.Un1k0d3r
PHP Jail 2	2	363	Mr.Un1k0d3r
PHP Jail 3	3	252	Mr.Un1k0d3r
PHP Jail 4	4	196	Mr.Un1k0d3r
PHP Jail 5	6	162	Mr.Un1k0d3r
PyJail 1	3	230	Martin Dube
PyJail 2	5	124	Martin Dube
PyJail 3	6	44	Martin Dube

JavaScript (10)

Challenges descriptions	Points	Validation	Author
Client side validation is bad!	1	6791	Mr.Un1k0d3r
Hashing is more secure	1	5900	Mr.Un1k0d3r
Then obfuscation is more secure	1	4498	Mr.Un1k0d3r
Most Secure Crypto Algo	2	1639	Mr.Un1k0d3r
Valid key required	2	895	Francois Lajeunesse
Why not?	2	3425	Mr.Un1k0d3r
Why not be more secure?	5	556	Mr.Un1k0d3r
WTF Lol!	6	259	HoLyVieR
Interstellar PhoneBook	6	39	NSEC 2018 (HoLyVieR)
Beauty and the beast	7	39	Mr.Un1k0d3r

Malware Analysis (22)

Challenges descriptions	Points	Validation	Author
APT 1337	4	46	NSEC 2017 (Mr.Un1k0d3r)
Capture 1 Part 1	1	627	Mr.Un1k0d3r
Capture 1 Part 2	1	209	Mr.Un1k0d3r
Capture 1 Part 3	1	233	Mr.Un1k0d3r
Capture 1 Part 4	2	34	Mr.Un1k0d3r
Capture 1 Part 5	3	56	Mr.Un1k0d3r
Capture 1 Part 6	3	147	Mr.Un1k0d3r
Capture 1 Part 7	3	29	Mr.Un1k0d3r
Capture 2 Part 1	1	56	Mr.Un1k0d3r
Capture 2 Part 2	1	107	Mr.Un1k0d3r
Capture 2 Part 3	1	108	Mr.Un1k0d3r
Capture 2 Part 4	3	105	Mr.Un1k0d3r
Capture 2 Part 5	4	38	Mr.Un1k0d3r
Capture 2 Part 6	7	16	Mr.Un1k0d3r
Evil X	8	3	cyberguru
Just Another MBR Ransomware	8	18	Towel
RAO democracy	4	52	NSEC 2017 (Mr.Un1k0d3r)
This malware excels Part 1	2	28	HF 2020 (nic-lovin)
This malware excels Part 2	1	27	HF 2020 (nic-lovin)
This malware excels Part 3	2	19	HF 2020 (nic-lovin)
This malware excels Part 4	5	12	HF 2020 (nic-lovin)
WebShell of Hell	5	18	An0n

Pwnage Linux (21)

Challenges descriptions	Points	Validation	Author
Level1 Pwnage Linux Level Up	1	661	P-Y Feat Martin Dube
Level2 Pwnage Linux Level Up	2	409	P-Y Feat Martin Dube
Remote Auth	2	96	NSEC 2015
Level3 Pwnage Linux Level Up	3	293	P-Y Feat Martin Dube
The Vault	3	48	Mr.Un1k0d3r
Level1 Pwnage Linux x86_64	3	197	Mr.Un1k0d3r
Level2 Pwnage Linux x86_64	4	69	Mr.Un1k0d3r
Sometime there is no buffer overflow	4	70	Mr.Un1k0d3r
Can you get the service password	4	112	Mr.Un1k0d3r
Friendly race	5	21	Garigouster
Level4 Pwnage Linux Level Up	5	139	Mr.Un1k0d3r
RPCFTW!	6	34	NSEC 2015
Jack the heaper	6	18	uaf.io
Level4 Pwnage Linux x86_64	7	41	Mr.Un1k0d3r
Level3 Pwnage Linux x86_64	7	66	Mr.Un1k0d3r
Base64 As A Service	8	26	Guilt
Take over the Virtual World	8	37	NSEC 2015
Just another useless service	8	34	NSEC 2015
All You Need Is a Client	8	10	Mr.Un1k0d3r (Trustwave CTF 2020)
Base64 As A Service Reloaded	9	21	Guilt
Delivery As A Service	10	14	NSEC 2016

Reverse Engineering (56)

Challenges descriptions	Points	Validation	Author
Can you see through the star	2	1261	Mr.Un1k0d3r
See No Evil - Part 1	2	138	alxbl
Gift as a Service Part 2	2	40	H0H0H0 Day (R0 team)
Time to learn x86 ASM & gdb	2	2047	Mr.Un1k0d3r
See No Evil - Part 2	3	106	alxbl
See No Evil - Part 3	3	102	alxbl
Intro To Sparc	3	182	Ian-Kyle Wagner
Kernel introduction	3	263	Mr.Un1k0d3r
Heap allocator	3	281	NSEC 2015
Windows x86 reversing is cool	3	715	Mr.Un1k0d3r
Crack Me 1	3	771	Mr.Un1k0d3r
Introduction to MIPS	3	324	Mr.Un1k0d3r
I never forget the Nintendo 64	3	640	Mr.Un1k0d3r
Power to the people	4	72	NSEC 2015
Old School	4	80	Towel
Let's take a detour	4	97	Floesen
Altera?	4	74	NSEC 2016
Wrong byte!	4	277	Mr.Un1k0d3r
Windows API for the win	4	340	Mr.Un1k0d3r
Introduction to ARM	4	357	Mr.Un1k0d3r
Space Invaders	4	22	Trustwave CTF 2020
I love tea!	4	31	nic-lovin
See No Evil - Part 5	4	68	alxbl
See No Evil - Part 4	4	75	alxbl
ASM Lovers	4	94	NSEC 2016
The MI7 password prompt	5	65	NSEC 2018 (Mr.Un1k0d3r)
Reindeer Game	5	12	H0H0H0 Day 2020 (Towel)
Phenix Golgoth	5	59	Hackfest 2016
Can I speak with the kernel?	5	88	Zerosum0x0
WASM Part 1	5	71	NSEC 2018 (Isra17)
Back to our roots	5	119	Mr.Un1k0d3r
Virtual World	5	83	NSEC 2015
RingZer0 Authenticator	5	243	Ekse
Smart enough?	5	123	NSEC 2015
Pwndr3 Authenticator	5	65	Pwndr3
Flag stealer	6	80	Ekse
Need a client	6	73	Mr.Un1k0d3r
Update Manager	6	66	Ekse
I Think I forgot to take out the garbage!	6	25	Mr.Un1k0d3r
SOS Lib	7	33	Mr.Un1k0d3r
Armed and ready	7	21	NSEC 2015
The supreme bash	7	25	NSEC 2017 (Mr.Un1k0d3r)
Cappin'	7	2	Mr.Un1k0d3r (Trustwave CTF 2020)
Buggy Bunny	7	10	Garigouster
Rebate As A Service	8	42	NSEC 2016
You're not welcome	8	54	Towel
WASM Part 2	8	8	NSEC 2018 (Isra17)
License to kill	8	3	Mr.Un1k0d3r
The Matrix	9	12	Towel
Trolling the troll	10	32	Mr.Un1k0d3r
Keygen time again	10	31	GoSec CTF 2014
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	10	NSEC 2018 (Towel)

Shellcoding (7)

Challenges descriptions	Points	Validation	Author
Basics of Linux x64 shellcoding	2	518	Mr.Un1k0d3r
Linux x64 shellcoding level 2	4	264	Mr.Un1k0d3r
Linux x64 shellcoding level 3	6	206	Mr.Un1k0d3r
Linux x64 shellcoding level 4	8	163	Mr.Un1k0d3r
Linux x64 shellcoding level 5	10	115	Mr.Un1k0d3r
Linux x64 shellcoding level 6	12	99	Mr.Un1k0d3r
Linux x64 shellcoding level 7	14	58	Mr.Un1k0d3r

Software Defined Radio (5)

Challenges descriptions	Points	Validation	Author
SigID Level 1	1	964	Guenael
You Turn Me On And Off	3	12	Trustwave CTF 2020
Let's Get Scwhifty!	5	11	Trustwave CTF 2020
SigID Level 2	6	13	Guenael
Don't flip out, Thomas!	7	11	Trustwave CTF 2020

SQL Injection (32)

Challenges descriptions	Points	Validation	Author
Most basic SQLi pattern.	1	8818	Mr.Un1k0d3r
Random Login Form	2	1874	Mr.Un1k0d3r
Po po po po postgresql	2	1954	Mr.Un1k0d3r
Login portal 1	2	3260	Mr.Un1k0d3r
ACL rulezzz the world.	2	4254	Mart
Login portal 2	3	702	Mr.Un1k0d3r
Don't mess with Noemie; she hates admin!	3	862	Mr.Un1k0d3r
0 Day Store	3	131	NSEC 2015
What's the definition of NULL	3	714	Mr.Un1k0d3r
Don't Stumble in the Process	4	54	mbergeron
Brain Teaser 1	4	27	Sideni
Quote of the day	4	630	Mr.Un1k0d3r
No more hacking for me!	4	314	Mr.Un1k0d3r
Thinking outside the box is the key	4	524	Mr.Un1k0d3r
Quote of the day reloaded	5	244	Mr.Un1k0d3r
When it's lite it's not necessarily easy	6	221	Mr.Un1k0d3r
Login portal 3	6	251	Mr.Un1k0d3r
Hot Single Mom	6	168	GoSec CTF 2014
Internet As A Service	7	121	Mr.Un1k0d3r
Size DOES matter	7	139	Mr.Un1k0d3r
Brain Teaser 2	7	15	Sideni
/etc/passwd	7	148	Mr.Un1k0d3r
Groups of hacker	7	159	Mr.Un1k0d3r
Login portal 4	7	149	Mr.Un1k0d3r
Login portal 5	8	71	Mr.Un1k0d3r
The useless search tool	8	122	Mr.Un1k0d3r
stackoverflow.com lied to me... again	9	80	Corb3nik
Doctor Who ?	9	9	Sideni
Login portal 6	10	59	Mr.Un1k0d3r
SQHell	11	14	Sideni feat. mbergeron
Don't Stumble in the Process Reloaded	12	8	mbergeron
!Mysql + Brain fart	13	31	Mr.Un1k0d3r

Steganography (24)

Challenges descriptions	Points	Validation	Author
You're lost? Use the map	1	1663	Mr.Un1k0d3r
Victor you're hidding me something	1	2398	Cedrick Chaput
The vestige of dial-up Internet	2	148	Uid0
Pixel Everywhere	2	145	Mr.Un1k0d3r
Hidden In Plain Sight	2	635	NSEC 2015
Missing Pieces	2	735	Cedrick Chaput
Brainsick	2	824	Mr.Un1k0d3r
I'm Goronyo Babad Nigerian prince	2	532	Mr.Un1k0d3r
The Sloth	2	116	Misker
Victor reloaded	2	972	Cedrick Chaput
A ghost sound	2	780	Cedrick Chaput
Look inside the house	2	916	Mr.Un1k0d3r
Crazy Cat Lady	3	80	Madness
Can you see through the matrix!	3	140	Mr.Un1k0d3r
Love Letter	3	193	Towel
5 beautiful colors	3	46	PublicName
Your old friend Orloge Simard	3	567	Cedrick Chaput
Even the Odds	4	17	alxbl
Not just 64	4	15	Madness
Stay Classy!	4	17	Sideni
Can you see through the matrix reloaded!	4	27	Towel
Walk the line!	5	143	Cedrick Chaput
Stop the violence	5	18	jusb3
Stop the violence 2	5	6	jusb3

SysAdmin Linux (8)

Challenges descriptions	Points	Validation	Author
SysAdmin Part 1	1	2439	Cedrick Chaput
SysAdmin Part 2	1	1765	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 3	1	1119	Mr.Un1k0d3r
SysAdmin Part 4	2	1053	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 5	2	674	Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 6	3	638	Cedrick Chaput
SysAdmin Part 7	4	518	Cedrick Chaput
SysAdmin Part 8	4	575	Cedrick Feat Mr.Un1k0d3r

The NC8 Reverse Engineering Track (6)

Challenges descriptions	Points	Validation	Author
NC8 MAINFRAME MANAGEMENT INTERFACE Part 1	7	53	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 1	3	32	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 2	7	31	NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 3	10	31	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 (51)

Challenges descriptions	Points	Validation	Author
Looking for password file	1	4220	Mr.Un1k0d3r
Big Brother is watching	1	4010	Mr.Un1k0d3r
Area 51	1	2729	Mr.Un1k0d3r
Headache	1	3542	Mr.Un1k0d3r
Words mean something?	1	2830	Mr.Un1k0d3r
Hacking skill are optional	1	205	Breached Company
Unreadable captcha	2	382	SynneR
Captcha I	2	538	SynneR
Password reset	2	936	Mr.Un1k0d3r
Admin Portal	2	1136	Mr.Un1k0d3r
PHP Fairy	2	850	nic-Lovin
XSS Challenge 1	2	472	Mr.Un1k0d3r
XSS Challenge 2	2	455	Mr.Un1k0d3r
Security thru obscurity!	2	951	Mr.Un1k0d3r
Malicious upload	2	564	Mr.Un1k0d3r
Gift as a Service Part 1	3	46	H0H0H0 Day (R0 team)
PHP feature or 0day?	3	417	Mr.Un1k0d3r
UploadStar	3	39	nopernik
Beyond Reality Part 1	3	42	NSEC 2019 (ldionmarcil)
NeuroSoft: Observation Unit Center	3	44	NSEC 2019 (ldionmarcil)
Captcha IV	3	31	FadedForEver
JWT pitfall 1	3	57	Mr.Un1k0d3r
REST in peace	3	203	GoSec CTF 2014
XSS Challenge 3	3	185	Mr.Un1k0d3r
XSS Challenge 4	3	199	Mr.Un1k0d3r
Facebook will never forget this one	3	211	Mr.Un1k0d3r
Password reset reloaded	3	342	Mr.Un1k0d3r
Looking for the flag?	3	698	Mr.Un1k0d3r
Serial killer!	3	440	Mr.Un1k0d3r
Propaganda mail	4	232	NSEC 2015
Captcha II	4	137	SynneR
Captcha III	4	50	mbergeron
Beyond Reality Part 2	5	27	NSEC 2019 (ldionmarcil)
Lost API	5	35	NSEC 2019 (HoLyVieR)
The archive	5	22	NSEC 2019 (HoLyVieR)
UploadStar Reloaded	5	26	nopernik
Super Lottery	5	73	davidlebr1
Password Reset As a Service	5	59	Mr.Un1k0d3r
Timesheet As a Service	5	22	Mr.Un1k0d3r
Freedom Firewall	5	120	NSEC 2015
Read the unreadable	5	111	Mr.Un1k0d3r
XSS Challenge 5	6	123	Mr.Un1k0d3r
PHP feature or 0day reloaded?	6	72	Mr.Un1k0d3r
Serial killer part 2	6	43	HoLyVieR
Orao's factory	6	112	NSEC 2015
I hate this one	6	217	Mr.Un1k0d3r
XPATH of hell!	7	132	Francois L. Feat Mr.Un1k0d3r
Ping It!	7	30	mnadeau
Super Lottery Reloaded	7	26	davidlebr1 Feat mbergeron
Looking for god in your life?	8	63	NSEC 2015
Secure Mail	8	79	GoSec CTF 2014

Flag statistics (176230 submitted so far)

Number of points	Number of validation	Number of points	Number of validation
18 points	10	15 points	15
14 points	65	13 points	48
12 points	148	11 points	39
10 points	306	9 points	177
8 points	989	7 points	2288
6 points	4746	5 points	4841
4 points	10534	3 points	20880
2 points	57366	1 points	73778

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.