HACKvent 2016 - discutii + rezolvari

[Byte-ul]

Avand in vedere lipsa de activitate la aceasta sectiune, am decis sa deschid acest thread, care probabil va fi urmat de altele daca este primit cu bine  Scopul este sa invatati ceva din discutiile ce vor urma si din writeup-urile postate, nu sa concurati intre voi.

 

Link: http://hackvent.hacking-lab.com/index.php

 

Day 01: Detours

Santa receives an email with links to three pictures, but every picture is the same. He talks with some of his elves and one says, that there is some weird stuff happening when loading these pictures. Can you identify it?
Link 1: http://ow.ly/unCT306N19f
Link 2: http://ow.ly/xW3h306N18f
Link 3: http://ow.ly/3wfc306N10K

Day 02: Free Giveaway

Today, Santa has a free giveaway for you:
DK16[OEdo[''lu[;"Nl[R"D4[2Qmi

Day 03: Manufactory

Today's gift is ready to be manufactured, but Santa's afraid that his factory won't manage to do a production run before christmas. But perhaps you can create it yourself?
Link: http://hackvent.hacking-lab.com/instructions

Day 04: Language Of Us

You all should know this language, but this one is not that consequent as it should be.
Link: http://hackvent.hacking-lab.com/the-text.txt

Day 05: Boolean Fun

Santa found a paper with some strange logical stuff on it. On the back of it there is the hint: "use 32 bit".
He has no clue what this means - can you show him, what "???" should be?

Image: http://hackvent.hacking-lab.com/everyBitIsImportant.png
Link (needed for the 'flag'): http://hackvent.hacking-lab.com/challenge.php?day=5

Day 06: Back 2 Work

Greetings from Thumper, he has an order for you:

1. unzip: the password is confidential
2. find the flag
3. look at my holiday pictures

Comment: Be aware, the pictures are only supplement.

Link: http://hackvent.hacking-lab.com/holiday.zip

Day 07: TrivialKRYPTO 1.42

Today's present is encrypted. Luckily Santa did not use Kryptochef's KRYPTO 2.0 so there might be a slight chance of recovering it?

Link: http://hackvent.hacking-lab.com/trivialcrypt.html

Day 08: Lost In Encoding

Santa and his elves do not know good encryption, all they have heard about are some basic encodings. Unfortunately they all are bungling and forgotten the recipe.
It's now on you, who has to get it up.

Link: http://hackvent.hacking-lab.com/l0st_1n_7ranslation.fun

Day 09: Illegal Prime Number

I've heard something about illegal prime numbers... Maybe this number contains the flag:

4315891123054519227800425234439024406406805990983946954154956695012431283551657417585179574642755601169096280017484467053951914982126613234225200384245049037787654523558017678649278076716108200271927575791497929092184238813619846729315518237924881623603111094979071286017407153529043066655388316378457694291590703681341752561492723137474482263373673210248633961843479034160811982934510083276506238457901538373531195688165166964398815874378480986164601388393975141268984935852959700100872597068350527482364309

Day 10: I want to play a Game

Reversing Day 1: we'll start with an easy one.
Link: http://hackvent.hacking-lab.com/ReGame_Part1.zip

 

Rezolvari (+ writeups):

Spoiler

Day 01: Detours

Se dau 3 linkuri:
Link 1: http://ow.ly/unCT306N19f
Link 2: http://ow.ly/xW3h306N18f
Link 3: http://ow.ly/3wfc306N10K

Intrati pe fiecare, veti fi redirectionati astfel:
Link 1: http://ow.ly/unCT306N19f  ->  http://bit.do/HV16-t8Kd
Link 2: http://ow.ly/xW3h306N18f  ->  http://bit.do/38aY-QxL5
Link 3: http://ow.ly/3wfc306N10K  ->  http://bit.do/bn4K-c6Lw

Textul cautat este: HV16-t8Kd-38aY-QxL5-bn4K-c6Lw

Day 03: Manufactory

Cu o scurta cautare pe google va dati seama ca textul de la linkul http://hackvent.hacking-lab.com/instructions este gcode (cod pentru imprimante 3D).
Un site pentru a "rula" astfel de cod online este http://gcode.ws/

Incarcati fisierul, mergeti la tab-ul 3D pentru a se vedea cel mai ok. Va aparea un cod QR, care scanat va arata flag-ul.

 

 

 

Discutati, rezolvati, postati ceea ce gasiti, etc.  

Va rog sa folositi spoilere in toate discutiile referitoare la rezolvarea unui challenge.

Edited January 7, 2017 by Byte-ul

[u0m3]

@Byte-ul tu ai trecut de 2 (Santa's free giveaway)?

[Byte-ul]

12 hours ago, u0m3 said:

@Byte-ul tu ai trecut de 2 (Santa's free giveaway)?

Nu am facut pe 2.

 

Spoiler

Am vazut ca al doilea nibble pare sa fie shiftat la stanga cu 1 atunci cand al doilea bit e 1 (dupa cum sunt primele doua litere). Din pacate nu se aplica la tot

 

[theeternalwanderer]

Hint-ul de la 2 era: the keys are the key