About

ZeroNights hackquest is a hacking challenge before annual ZeroNights conference where the goal is to solve tasks related to information security (reverse engineering, web, mobile hacking, penetration testing and more).
The winners receive free invitation to the conference and a place in our Hall of Fame.

There is no pre-registration for a quest. When tasks are available there will be a field for a flag and your email.

If you have any questions related to hackquest - drop us a line at hackquest@zeronights.org

2021's Rules

  1. Hackquest lasts 5 days, from 20:00 May 24 to 19:59:59 May 29 (each task starts at 20:00 Moscow Time (UTC+3, check your time);
  2. One task a day. Task duration: 24 hours;
  3. 5 tasks in total;
  4. The first person to solve the task and provide valid detailed write-up will get an invite;
  5. The second and third participants to solve the task will also earn points. The second one gets 0.5 point, the thirdβ€”0.25. 1 point will get you 1 invitation, but not more than one per one competitor;
  6. It's prohibited to share hints and flags with other participants;
  7. Current date and time: 2021-10-22 15:25:26

Good luck and have fun!

Day 1 / Collapse

Description

Day 2 / Not a problem.

Description

Hints

26/05/2021 13:18
An error in crypto library was found, task files were updated.

Day 3 / Regular Cipher

Description

Day 4 / Exotic

Description

Hints

29/05/2021 16:30
Binary was updated
29/05/2021 15:50
We did some reverse engineering and found that device serves this page: http://65.21.190.119:31345/verify?password=_reverse_me_

Day 5 / Read It Later

Description

Winners

Task Place Nickname Reward
Day #1 / Collapse #1 beched Invite
Day #2 / Not a problem. #1 AV1ct0r Invite
#2 sysenter 0.5 points
#3 YOBA 0.25 points
Also solved revervand, s0ph1e, hedger, a.v.e.r, vient, Felis-Sapiens
Day #3 / Regular Cipher #1 WGH Invite
#2 hedger 0.5 points
#3 YOBA 0.25 points
Also solved vient, s0ph1e, keltecc, Obriv Mostov
Day #4 / Exotic #1 YOBA Invite
#2 hedger 0.5 points
Day #5 / Read it later #1 ma9a Invite
#2 arbn 0.5 points
#3 ims0lo(testik_testov) 0.25 points
Also solved empty.jack, sysenter

Hall of fame

Winners of 2019

Task Place Nickname Reward
Day #1 / TOP SECRET #1 vladvis Invite
#2 YOBA 0.5 points
Day #2 / MICOSOFT LUNIX #1 torn Invite
#2 Sin__ 0.5 points
#3 AV1ct0r 0.25 points
Also solved demidov_al, YOBA, medidrdrider, groke_is_love_groke_is_life
Day #3 / HOUSE OF BECHED #1 blackfan Invite
Day #4 / ASR-EHD #1 AV1ct0r Invite
Day #5 / PROTECTED SHELL #1 vos Invite
#2 Bartimaeous 0.5 points
#3 CLO 0.25 points
Also solved Maxim Pronin, 0x3c3e, tinkerlock, demidov_al, x@secator, groke_in_the_sky, d3fl4t3
Day #6 / UNLOCK #1 YOBA Invite
#2 medidrdrider 0.5 points
#3 sysenter 0.25 points
Day #7 / Beep Beep! #1 sysenter Invite

Winners of 2018

Task Place Nickname Reward
Day #1 / Galois #1 Felis-Sapiens Invite
#2 sysenter 0.5 points
#3 AV1ct0r 0.25 points
Also solved a1exdandy
Day #2 / BLACKANWYTE #1 QwErTy Invite
#2 AV1ct0r 0.5 points
Day #3 / PAD ME #1 AV1ct0r Invite
#2 a1exdandy 0.5 points
#3 Felis-Sapiens 0.25 points
Day #4 / IMAGE HUB #1 sysenter Invite
#2 antichat.com 0.5 points
Day #5 / TIME #1 beched Invite
Day #6 / AWESOME VM #1 a1exdandy Invite
Day #7 / HIDDEN RESOURCE #1 Bartimaeous Invite

Winners of 2017

Task Place Nickname Reward
Day #1 / Webpwn #1 blackfan Invite
#2 DarkCaT 0.5 points
#3 kreon 0.25 points
Also solved ilyaluk, raz0r, akamajoris, kurlikasd, poneev, shvetsovalex007, leon+zeronights, mohemiv
Day #2 / PETROVKEY #1 vient Invite
#2 Felis-Sapiens 0.5 points
Day #3 / YOUAREWELCOME #1 Paul_Axe Invite
Day #4 / REMASONRY CHALLENGE #1 sysenter Invite
#2 AV1ct0r 0.5 points
#3 Felis-Sapiens 0.25 points
Also solved Aleksey Cherepanov
Day #5 / NOT SAFE AGENCY #1 maximilian Invite
#2 p41l 0.5 points
Day #6 / STRANGE COMMAND SERVER #1 Aleksey Cherepanov Invite
#2 smalukav 0.5 points
#3 paulch 0.25 points
Also solved okob2008, Kurlikasd, mcstarpro
Day #7 / HACKING CHAINS #1 ilyaluk Invite
#2 smalukav 0.5 points
#3 Felis-Sapiens 0.25 points

Winners of 2016

Task Place Nickname Reward
Day #1 #1 sysenter Invite
#2 vos 0.5 points
#3 smalukav 0.25 points
Also solved ilyaluk, AVictor2007, a.v.e.r, dmit.mx, felis-sapiens, stas.zn
Day #2 / Golden Rabbit #1 smalukav Invite
#2 ilyaluk 0.5 points
#3 vos 0.25 points
Day #3 / ETHERIUM BOT #1 ilyaluk Invite
#2 lozko.roma 0.5 points
#3 snk 0.25 points
Also solvedvladas.bulavas, okob2008, dartslon, beched
Day #4 / BAD ASSISTANT #1 beched Invite
#2 smalukav 0.5 points
#3 Aleksey Cherepanov 0.25 points
Day #5 / StrongBox #1 Stanislav Povolotsky Invite
Day #6 / Packer #1 erbolsyn Invite
#2 ilyaluk 0.5 points
Day #7 / I wanna be better! #1 blackfan Invite

Winners of 2015

Task Place Nickname Reward
Day #1 / Chocolate Factory #1 cdump Invite
#2 BlackFan 0.5 points
#3 kidcrash 0.25 points
Day #1 / Chocolate Factory (reborn) #1 BlackFan Invite
#2 Beched 0.5 points
#3 AV1ct0r 0.25 points
Day #2 / HSM V1.0 #1 Abr1k0s Invite
#2 BooL 0.5 points
#3 kidcrash 0.25 points
Day #3 / BAZAAR NG #1 AV1ct0r Invite
#2 shr 0.5 points
#3 Petuhov_Forever! 0.25 points
Day #4 / ILLOGICAL PHOTOGALLERY #1 Beched Invite
#2 bafoed 0.5 points
#3 allyofgood 0.25 points
Day #5 / CRACKME #1 sysenter Invite
#2 okob2008 0.5 points
#3 h0t_max 0.25 points
Day #6 / BANK ROBBERY #1 dr.glukyne Invite
Day #7 / BLINK2PWN #1 mr_dawerty Invite

Winners of 2014

Task Place Nickname
#1 / Alighieri #1 BECHED
Also solved derwolfman, neomant, Anton Cherepanov
#2 / Yolochka #1 BECHED
#3 / InfectedTerminal #1 sysenter
#4 / Chip-in-the-middle #1 GiftsUngiven
Also solved Dmitry Ananyev
#5 / M-Nature #1 Roman Bondarenko
Also solved Stanislav Povolotsky
#6 / Not a HARD task #1 Torn
Also solved goober, ispras team, Richard Baranyi, BECHED, qwerty@x.x
#7 / private bank haxing #1 Dmitry Ananyev
Also solved abc1111abc, beched, Abr1k0s ctf team, darkbyte, obriain, bmth, bo0om, arnor9400
#8 / Photo story #1 Sergey Bobrov
Also solved Dan, Alexander & Tolya

Winners of 2013

Task Place Nickname
#1 / Hello, snake #1 BECHED
#2 / Hello, snake (special task: read file) #1 Dan Sigalov
#3 / Hello, snake (special task: read + write) #1 George Noseevich
#4 / A problem #1 darkbyte_ru
#5 / Bo0oM #1 Ilia Deto
#6 / wheeeeeeeeeeeeeeeeee #1 vos
#7 / Erlang #1 Anton Sapozhnikov
#8 / [noname] #1 vos
#9 / Quake 3 #1 Andrey1800

Contacts

If you have any questions related to hackquest - drop us a line at hackquest@zeronights.org