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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 2500 Mr.Un1k0d3r
Ask your grandpa! 2 938 Mr.Un1k0d3r's Dad
Hash me reloaded 3 1401 Mr.Un1k0d3r
I hate mathematics 3 1499 Mr.Un1k0d3r
Ask your grandpa again! 4 306 Mr.Un1k0d3r's Dad
Hash breaker 4 1142 Mr.Un1k0d3r
I saw a little elf 4 409 Mr.Un1k0d3r
Hash breaker reloaded 5 669 Mr.Un1k0d3r
Execute me if you can 5 346 Mr.Un1k0d3r
Read me if you can 6 359 Mr.Un1k0d3r
Hash breaker reloaded again 6 227 Mr.Un1k0d3r
Ascii Art 6 537 Mr.Un1k0d3r
Execute me if you can again 6 173 Mr.Un1k0d3r
Xor me if you can 6 343 Mr.Un1k0d3r
Number game 7 256 Mr.Un1k0d3r remade by theindian
Classic Sudoku 7 216 Mr.Un1k0d3r remade by dread_knight
Find the right word 7 272 Mr.Un1k0d3r

Cryptography (32)

Challenges descriptions Points Validation Author
Some martian message 1 5226 Mr.Un1k0d3r
You're Drunk! 1 1104 Mr.Un1k0d3r
File recovery 1 2486 Mr.Un1k0d3r
Public key recovery 2 1223 Mr.Un1k0d3r
Fashion Victim 2 400 GoSec CTF 2014
Martian message part 2 2 2268 Mr.Un1k0d3r
Can you understand this sentence? 3 563 Mr.Un1k0d3r
Let's Play Scrabble! 3 25 Madness
I Lost my password 3 954 Mr.Un1k0d3r
Martian message part 3 3 851 Mr.Un1k0d3r
Hangovers and more: Bacon 3 436 SynneR
Crypto Leak 4 39 NSEC 2018 (Towel)
Crypto Object 4 160 GoSec CTF 2014
Crypto over the network 4 105 Mr.Un1k0d3r
Encrypted Zip 4 464 Mr.Un1k0d3r
Let's Play Scrabble! Part 2 5 11 Madness
Jabber 5 5 Madness
Is it a secure string? 5 217 Cedrick Chaput
Free Flag Encrypter 5 14 Towel
Pattern is the key 6 38 Mr.Un1k0d3r
TotalSecure Message Encrypter 6 78 Towel
Welcome to the asylum 6 51 GoSec CTF 2014
Homemade craptography #2 7 4 holyvier(ft. large software company)
Jabber Part 2 7 5 Madness
Crypto is not good as you think 8 149 Mr.Un1k0d3r
Mars Log 8 6 NSEC 2018 (Towel)
Homemade Craptography 8 6 NSEC 2018 (Holyvier)
Spies 9 28 CS Games 2016 (HoLyVieR)
Rusty RSA message signing service 9 10 b0n0n & An0n
TotalSecure Message Encrypter V2 10 17 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 1350 Mr.Un1k0d3r
DON'T login as admin 2 21 mbergeron
I forgot my password 3 21 mbergeron
Inspiration 6 26 NSEC 2019 (becojo)

Forensics (28)

Challenges descriptions Points Validation Author
Who I am part 2 1 380 Mr.Un1k0d3r
I made a dd of Agent Smith usb key 1 2633 Cedrick Chaput
I love cat 2 392 Mr.Un1k0d3r
Dr. Pouce 2 1961 Cedrick Chaput
Attention Dinosaure Survive 2 1070 PRL
The good, the bad and the ugly 2 64 Mr.Un1k0d3r
1 / 3 Do not waste the environment 2 828 PRL
Hide my ass in my home! 2 1267 Cedrick Chaput
Hey Chuck where is the flag? 2 1243 Mr.Un1k0d3r
Meat Loaf 2 204 Ekse
Who I am? 2 785 Mr.Un1k0d3r
The words flew but writing remains 3 133 Martin Dube
2 / 3 Did you see my desktop? 3 705 PRL
Are you Twisted Insane? 3 24 Cedrick Feat Mr.Un1k0d3r
Someone steal my flag! 3 317 Mr.Un1k0d3r
802.1X Part 1 4 50 NSEC 2015
3 / 3 Suspicious account password? 4 577 PRL
Poor internet connection 4 349 Cedrick Chaput
Agent Smith reloaded 4 220 Cedrick Chaput
R.I.P MsPaint 4 87 Misker
We got breached 5 175 Mr.Un1k0d3r
Someone steal my flag again 5 99 GoSec CTF 2014
Ping pong 5 75 SynneR
Spy my girl 5 165 Cedrick Chaput
We got breached again 6 131 Mr.Un1k0d3r
Russian Crypto Roulette 6 61 SynneR
Really Depressed Protocol 7 67 SynneR
802.1X Part 2 8 37 NSEC 2015

Jail Escaping (21)

Challenges descriptions Points Validation Author
Bash Jail 1 1 1821 Mr.Un1k0d3r
Bash Jail 2 2 1174 Mr.Un1k0d3r
Bash Jail 3 3 662 Mr.Un1k0d3r
Bash Jail 4 4 360 Mr.Un1k0d3r
Bash Jail 5 6 154 Mr.Un1k0d3r
Bash Jail 6 8 18 Garigouster
Bash Jail 7 12 13 Garigouster
C Jail 1 1 292 Mr.Un1k0d3r
C Jail 2 2 195 Mr.Un1k0d3r
C Jail 3 3 161 Mr.Un1k0d3r
C Jail 4 5 15 Garigouster
C Jail 5 7 10 Garigouster
C Jail 6 14 5 Garigouster
PHP Jail 1 1 468 Mr.Un1k0d3r
PHP Jail 2 2 306 Mr.Un1k0d3r
PHP Jail 3 3 206 Mr.Un1k0d3r
PHP Jail 4 4 153 Mr.Un1k0d3r
PHP Jail 5 6 124 Mr.Un1k0d3r
PyJail 1 3 189 Martin Dube
PyJail 2 5 104 Martin Dube
PyJail 3 6 35 Martin Dube

JavaScript (10)

Challenges descriptions Points Validation Author
Client side validation is bad! 1 5953 Mr.Un1k0d3r
Hashing is more secure 1 5179 Mr.Un1k0d3r
Then obfuscation is more secure 1 3906 Mr.Un1k0d3r
Most Secure Crypto Algo 2 1340 Mr.Un1k0d3r
Valid key required 2 781 Francois Lajeunesse
Why not? 2 3144 Mr.Un1k0d3r
Why not be more secure? 5 477 Mr.Un1k0d3r
WTF Lol! 6 223 HoLyVieR
Interstellar PhoneBook 6 29 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 1 525 Mr.Un1k0d3r
Capture 1 Part 2 1 174 Mr.Un1k0d3r
Capture 1 Part 3 1 199 Mr.Un1k0d3r
Capture 1 Part 4 2 19 Mr.Un1k0d3r
Capture 1 Part 5 3 47 Mr.Un1k0d3r
Capture 1 Part 6 3 129 Mr.Un1k0d3r
Capture 1 Part 7 3 25 Mr.Un1k0d3r
Capture 2 Part 1 1 50 Mr.Un1k0d3r
Capture 2 Part 2 1 88 Mr.Un1k0d3r
Capture 2 Part 3 1 89 Mr.Un1k0d3r
Capture 2 Part 4 3 88 Mr.Un1k0d3r
Capture 2 Part 5 4 33 Mr.Un1k0d3r
Capture 2 Part 6 7 14 Mr.Un1k0d3r
Just Another MBR Ransomware 8 15 Towel
RAO democracy 4 44 NSEC 2017 (Mr.Un1k0d3r)
WebShell of Hell 5 7 An0n

Pwnage Linux (19)

Challenges descriptions Points Validation Author
Level1 Pwnage Linux Level Up 1 556 P-Y Feat Martin Dube
Level2 Pwnage Linux Level Up 2 351 P-Y Feat Martin Dube
Remote Auth 2 96 NSEC 2015
Level3 Pwnage Linux Level Up 3 252 P-Y Feat Martin Dube
Level1 Pwnage Linux x86_64 3 176 Mr.Un1k0d3r
Level2 Pwnage Linux x86_64 4 60 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 5 119 Mr.Un1k0d3r
Friendly race 5 21 Garigouster
RPCFTW! 6 26 NSEC 2015
Jack the heaper 6 18 uaf.io
Level3 Pwnage Linux x86_64 7 56 Mr.Un1k0d3r
Level4 Pwnage Linux x86_64 7 33 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 (52)

Challenges descriptions Points Validation Author
Time to learn x86 ASM & gdb 2 1820 Mr.Un1k0d3r
Can you see through the star 2 1080 Mr.Un1k0d3r
See No Evil - Part 1 2 48 alxbl
Crack Me 1 3 702 Mr.Un1k0d3r
Heap allocator 3 229 NSEC 2015
Intro To Sparc 3 136 Ian-Kyle Wagner
Kernel introduction 3 218 Mr.Un1k0d3r
See No Evil - Part 2 3 35 alxbl
See No Evil - Part 3 3 35 alxbl
Introduction to MIPS 3 284 Mr.Un1k0d3r
Windows x86 reversing is cool 3 634 Mr.Un1k0d3r
I never forget the Nintendo 64 3 567 Mr.Un1k0d3r
Power to the people 4 47 NSEC 2015
Altera? 4 48 NSEC 2016
ASM Lovers 4 77 NSEC 2016
See No Evil - Part 5 4 23 alxbl
Old School 4 53 Towel
I love tea! 4 5 nic-lovin
See No Evil - Part 4 4 26 alxbl
Let's take a detour 4 72 Floesen
Windows API for the win 4 297 Mr.Un1k0d3r
Wrong byte! 4 247 Mr.Un1k0d3r
Introduction to ARM 4 320 Mr.Un1k0d3r
Virtual World 5 53 NSEC 2015
Phenix Golgoth 5 40 Hackfest 2016
WASM Part 1 5 49 NSEC 2018 (Isra17)
RingZer0 Authenticator 5 215 Ekse
Back to our roots 5 96 Mr.Un1k0d3r
Can I speak with the kernel? 5 55 Zerosum0x0
The MI7 password prompt 5 45 NSEC 2018 (Mr.Un1k0d3r)
Smart enough? 5 97 NSEC 2015
Pwndr3 Authenticator 5 48 Pwndr3
I Think I forgot to take out the garbage! 6 18 Mr.Un1k0d3r
Need a client 6 71 Mr.Un1k0d3r
Flag stealer 6 64 Ekse
Update Manager 6 50 Ekse
The supreme bash 7 19 NSEC 2017 (Mr.Un1k0d3r)
SOS Lib 7 22 Mr.Un1k0d3r
Buggy Bunny 7 10 Garigouster
Armed and ready 7 11 NSEC 2015
Rebate As A Service 8 36 NSEC 2016
You're not welcome 8 47 Towel
WASM Part 2 8 8 NSEC 2018 (Isra17)
License to kill 8 0 Mr.Un1k0d3r
The Matrix 9 10 Towel
Trolling the troll 10 30 Mr.Un1k0d3r
Keygen time again 10 30 GoSec CTF 2014
The unknown challenge 11 16 Mr.Un1k0d3r
WASM Part 3 12 6 NSEC 2018 (Isra17)
You're not welcome again! 12 20 Towel
The oracle 13 17 Towel
Mars Reloaded 18 8 NSEC 2018 (Towel)

Shellcoding (7)

Challenges descriptions Points Validation Author
Basics of Linux x64 shellcoding 2 469 Mr.Un1k0d3r
Linux x64 shellcoding level 2 4 238 Mr.Un1k0d3r
Linux x64 shellcoding level 3 6 183 Mr.Un1k0d3r
Linux x64 shellcoding level 4 8 146 Mr.Un1k0d3r
Linux x64 shellcoding level 5 10 101 Mr.Un1k0d3r
Linux x64 shellcoding level 6 12 84 Mr.Un1k0d3r
Linux x64 shellcoding level 7 14 44 Mr.Un1k0d3r

SQL Injection (32)

Challenges descriptions Points Validation Author
Most basic SQLi pattern. 1 7449 Mr.Un1k0d3r
Random Login Form 2 1333 Mr.Un1k0d3r
Po po po po postgresql 2 1474 Mr.Un1k0d3r
Login portal 1 2 2759 Mr.Un1k0d3r
ACL rulezzz the world. 2 3820 Mart
Login portal 2 3 472 Mr.Un1k0d3r
Don't mess with Noemie; she hates admin! 3 659 Mr.Un1k0d3r
0 Day Store 3 112 NSEC 2015
What's the definition of NULL 3 584 Mr.Un1k0d3r
Don't Stumble in the Process 4 41 mbergeron
Brain Teaser 1 4 18 Sideni
Quote of the day 4 534 Mr.Un1k0d3r
No more hacking for me! 4 259 Mr.Un1k0d3r
Thinking outside the box is the key 4 461 Mr.Un1k0d3r
Quote of the day reloaded 5 206 Mr.Un1k0d3r
When it's lite it's not necessarily easy 6 187 Mr.Un1k0d3r
Login portal 3 6 212 Mr.Un1k0d3r
Hot Single Mom 6 142 GoSec CTF 2014
Internet As A Service 7 83 Mr.Un1k0d3r
Size DOES matter 7 126 Mr.Un1k0d3r
Brain Teaser 2 7 11 Sideni
/etc/passwd 7 131 Mr.Un1k0d3r
Groups of hacker 7 148 Mr.Un1k0d3r
Login portal 4 7 130 Mr.Un1k0d3r
Login portal 5 8 68 Mr.Un1k0d3r
The useless search tool 8 113 Mr.Un1k0d3r
stackoverflow.com lied to me... again 9 69 Corb3nik
Doctor Who ? 9 7 Sideni
Login portal 6 10 56 Mr.Un1k0d3r
SQHell 11 13 Sideni feat. mbergeron
Don't Stumble in the Process Reloaded 12 8 mbergeron
!Mysql + Brain fart 13 30 Mr.Un1k0d3r

Steganography (25)

Challenges descriptions Points Validation Author
You're lost? Use the map 1 1348 Mr.Un1k0d3r
Victor you're hidding me something 1 2010 Cedrick Chaput
SigID Level 1 1 817 Guenael
Pixel Everywhere 2 102 Mr.Un1k0d3r
I'm Goronyo Babad Nigerian prince 2 383 Mr.Un1k0d3r
The vestige of dial-up Internet 2 72 Uid0
Missing Pieces 2 636 Cedrick Chaput
Brainsick 2 704 Mr.Un1k0d3r
Hidden In Plain Sight 2 514 NSEC 2015
The Sloth 2 93 Misker
Victor reloaded 2 837 Cedrick Chaput
A ghost sound 2 687 Cedrick Chaput
Look inside the house 2 757 Mr.Un1k0d3r
Crazy Cat Lady 3 51 Madness
Love Letter 3 160 Towel
5 beautiful colors 3 33 PublicName
Can you see through the matrix! 3 127 Mr.Un1k0d3r
Your old friend Orloge Simard 3 495 Cedrick Chaput
Not just 64 4 11 Madness
Stay Classy! 4 17 Sideni
Can you see through the matrix reloaded! 4 26 Towel
Even the Odds 4 10 alxbl
Walk the line! 5 126 Cedrick Chaput
Stop the violence 5 15 jusb3
SigID Level 2 6 11 Guenael

SysAdmin Linux (8)

Challenges descriptions Points Validation Author
SysAdmin Part 1 1 1995 Cedrick Chaput
SysAdmin Part 2 1 1424 Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 3 1 856 Mr.Un1k0d3r
SysAdmin Part 4 2 859 Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 5 2 512 Cedrick Feat Mr.Un1k0d3r
SysAdmin Part 6 3 488 Cedrick Chaput
SysAdmin Part 7 4 393 Cedrick Chaput
SysAdmin Part 8 4 465 Cedrick Feat Mr.Un1k0d3r

The NC8 Reverse Engineering Track (6)

Challenges descriptions Points Validation Author
NC8 MAINFRAME MANAGEMENT INTERFACE Part 1 7 39 NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 1 3 24 NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 2 7 23 NSEC 2018 (isra17)
NC8 MAINFRAME MANAGEMENT INTERFACE Part 2 Flag 3 10 22 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 (42)

Challenges descriptions Points Validation Author
Area 51 1 2193 Mr.Un1k0d3r
Words mean something? 1 2335 Mr.Un1k0d3r
Headache 1 2974 Mr.Un1k0d3r
Hacking skill are optional 1 92 Breached Company
Big Brother is watching 1 3282 Mr.Un1k0d3r
Looking for password file 1 3299 Mr.Un1k0d3r
XSS Challenge 1 2 281 Mr.Un1k0d3r
Admin Portal 2 1011 Mr.Un1k0d3r
Password reset 2 795 Mr.Un1k0d3r
XSS Challenge 2 2 297 Mr.Un1k0d3r
PHP Fairy 2 626 nic-Lovin
Unreadable captcha 2 317 SynneR
Malicious upload 2 451 Mr.Un1k0d3r
Security thru obscurity! 2 852 Mr.Un1k0d3r
Captcha I 2 453 SynneR
PHP feature or 0day? 3 338 Mr.Un1k0d3r
JWT pitfall 1 3 27 Mr.Un1k0d3r
REST in peace 3 188 GoSec CTF 2014
Serial killer! 3 399 Mr.Un1k0d3r
Password reset reloaded 3 312 Mr.Un1k0d3r
Looking for the flag? 3 622 Mr.Un1k0d3r
Facebook will never forget this one 3 177 Mr.Un1k0d3r
XSS Challenge 4 3 166 Mr.Un1k0d3r
XSS Challenge 3 3 148 Mr.Un1k0d3r
Propaganda mail 4 194 NSEC 2015
Captcha II 4 114 SynneR
Captcha III 4 32 mbergeron
Lost API 5 14 holyvier (NSEC 2019)
Password Reset As a Service 5 41 Mr.Un1k0d3r
Super Lottery 5 42 Sparkix
Read the unreadable 5 82 Mr.Un1k0d3r
Freedom Firewall 5 95 NSEC 2015
The archive 5 12 holyvier (NSEC 2019)
Timesheet As a Service 5 22 Mr.Un1k0d3r
I hate this one 6 194 Mr.Un1k0d3r
Serial killer part 2 6 38 HoLyVieR
PHP feature or 0day reloaded? 6 66 Mr.Un1k0d3r
XSS Challenge 5 6 99 Mr.Un1k0d3r
Orao's factory 6 95 NSEC 2015
XPATH of hell! 7 115 Francois L. Feat Mr.Un1k0d3r
Secure Mail 8 67 GoSec CTF 2014
Looking for god in your life? 8 58 NSEC 2015

Flag statistics (146593 submitted so far)

Number of points Number of validation Number of points Number of validation
18 points 8 15 points 14
14 points 49 13 points 47
12 points 131 11 points 36
10 points 272 9 points 145
8 points 860 7 points 1833
6 points 4063 5 points 3888
4 points 8796 3 points 17286
2 points 47962 1 points 61203

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

2020-01-20 09:13:05 - rina
I can't get ssh connection with "SysAdmin Part 6", is everything ok with the task?
2020-01-17 23:26:16 - antho-newbie
xss bot
2020-01-17 04:03:42 - Towel
Challenge 231 (I'm Goronyo Babad Nigerian prince) is up and working again.
2020-01-06 17:14:57 - madness
@speles You appear to be correct.
2020-01-05 15:59:08 - speles
Hi! Is https://ringzer0ctf.com/challenges/231 still solvable? The (seemingly correct) decoder produces garbage output for me.
2019-12-21 22:58:40 - team_rocket
chal 180 (friendly race) is down.
2019-12-20 09:33:58 - cowthecows
plzzz help me with level1 jail escape challenge
2019-11-18 18:11:00 - jmiller
I can't ssh into the 'Sometime there is no buffer overflow' challenge. Is it down?
2019-11-08 14:29:32 - madness
For capture 1 part 5, I found two passwords (one is obtained from the other), but the challenge page is not accepting. Anyone?
2019-11-03 22:20:28 - madness
Is "I need a client" included in the statement "Virtual world sandbox is down"? Thanks
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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