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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

Challenges


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.

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