Difficulty: Beginner/Intermediate

Instructions: The CTF is a virtual machine and has been tested in Virtual Box. It has all required drivers if you want it to run on VMware or KVM (virtio). The network interface of the virtual machine will take it`s IP settings from DHCP.

Flags: There are 7 flags that should be discovered in form of: Country_name Flag: [md5 hash]. In CTF platform of the CTF-USV competition there was a hint available for each flag, but accessing it would imply a penalty. If you need any of those hints to solve the challenge, send me a message on Twitter @gusu_oana and I will be glad to help.

About: CTF-USV 2016 was the first International Students Contest in Information Security organized in Romania by Suceava University. Security challenges creation, evaluation of results and building of CTF environment was provided by Safetech Tech Team: Oana Stoian (@gusu_oana), Teodor Lupan (@theologu) and Ionut Georgescu (@ionutge1)

SHA1: f401e4e9084f937a674356dd4fa2144e10b8471a

This course details the exploitation of a weakness in the authentication of a PHP website. The website uses Cipher Block Chaining (CBC) to encrypt information provided by users and use this information to ensure authentication. The application also leaks if the padding is valid when decrypting the information. We will see how this behaviour can impact the authentication and how it can be exploited.

Source: https://pentesterlab.com/exercises/padding_oracle/course

64Base Boot2Root

This is my very first public Boot2Root, It’s intended to be more of a fun game than a serious hacking challenge. Hopefully anyone interested enough to give it a try will enjoy the story with this one.

It is based on the StarWars storyline and is designed to Troll you in a fun way.

Just be warned, it’s littered with more than a few “Red Herrings” ;D

Difficulty Rating

[BEGINNER - INTERMEDIATE]

Capture The Flags

There are 6 flags to collect. Each in the format of flag1{ZXhhbXBsZSBmbGFnCg==} Beat the Empire and steal the plans for the Death Star before its too late.

I Hope You Enjoy It.

DC416 CTF CHALLENGES

These four virtual machines were created by members of the VulnHub CTF Team for DefCon Toronto's first offline CTF.

They have been tested with VirtualBox, and will obtain an IP address via DHCP upon bootup. Difficulty ranges from beginner to intermediate.

Each machine has a landing page on port 80 which describes the number of flags it has, along with any additional rules or hints.

Enjoy!

This was used in HackDay Albania's 2016 CTF.

The level is beginner to intermediate .

It uses DHCP.

SkyDog Con CTF 2016 - Catch Me If You Can

Difficulty: Beginner/Intermediate

Instructions: The CTF is a virtual machine and works best in Virtual Box. Download the OVA file open up Virtual Box and then select File –> Import Appliance. Choose the OVA file from where you downloaded it. After importing the OVA file above make sure that USB 2.0 is disabled before booting up the VM. The networking is setup for a Host-Only Adapter by default but you can change this before booting up depending on your networking setup. The Virtual Machine Server is configured for DHCP. If you have any questions please send me a message on Twitter @jamesbower and I’ll be happy to help.

Flags

The eight flags are in the form of flag{MD5 Hash} such as flag{1a79a4d60de6718e8e5b326e338ae533

Flag #1 Don’t go Home Frank! There’s a Hex on Your House.

Flag #2 Obscurity or Security?

Flag #3 Be Careful Agent, Frank Has Been Known to Intercept Traffic Our Traffic.

Flag #4 A Good Agent is Hard to Find.

Flag #5 The Devil is in the Details - Or is it Dialogue? Either Way, if it’s Simple, Guessable, or Personal it Goes Against Best Practices

Flag #6 Where in the World is Frank?

Flag #7 Frank Was Caught on Camera Cashing Checks and Yelling - I’m The Fastest Man Alive!

Flag #8 Franks Lost His Mind or Maybe it’s His Memory. He’s Locked Himself Inside the Building. Find the Code to Unlock the Door Before He Gets Himself Killed!

Welcome to another boot2root / CTF this one is called Teuchter. The VM is set to grab a DHCP lease on boot. As with my previous VMs, there is a theme, and you will need to snag the flag in order to complete the challenge. Less hochmagandy and more studying is needed for this one!

A word of warning: The VM has a small HDD so please set the disk to non persistent so you can always revert. You may need to set the MAC to 00:0C:29:65:D0:A0 too.

Hints for you:

  • This VM is designed to be a bit of a joke/troll so a translator might be useful.
  • The challenge isn't over with root. I've done my usual flag shenanigans.
  • A bit of info security research and knowing your target helps here.
  • http://www.jackiestewart.co.uk/jokes/weegie%20windies%202000.htm

SHA1SUM: b5a89761b0a0ee9f0c5e1089b2fde9649ba76b3f Teuchter_0.3.ova

IMF: 1

Geckom 30 Oct 2016

Welcome to "IMF", my first Boot2Root virtual machine. IMF is a intelligence agency that you must hack to get all flags and ultimately root. The flags start off easy and get harder as you progress. Each flag contains a hint to the next flag. I hope you enjoy this VM and learn something.

Difficulty: Beginner/Moderate

Can contact me at: geckom at redteamr dot com or on Twitter: @g3ck0m

IMPORTANT NOTE: do not use host-only mode, as issues have been discovered. Set the Billy Madison VM to "auto-detect" to get a regular DHCP address off your network.


Plot: Help Billy Madison stop Eric from taking over Madison Hotels!

Sneaky Eric Gordon has installed malware on Billy's computer right before the two of them are set to face off in an academic decathlon. Unless Billy can regain control of his machine and decrypt his 12th grade final project, he will not graduate from high school. Plus, it means Eric wins, and he takes over as head of Madison Hotels!


Objective: The primary objective of the VM is to figure out how Eric took over the machine and then undo his changes so you can recover Billy's 12th grade final project. You will probably need to root the box to complete this objective.


Download:

  • BillyMadison1dot0.zip - https://dl.dropboxusercontent.com/u/5473387/BillyMadison1dot0.zip
  • MD5 = afcb926608d6d7b2471e4de6c367afb4
  • SHA1 = 4933ca408fcb2e88e6388fe4ea321f758b133d72

Other Information:

  • Size: 1.68GB
  • Hypervisor: Created with VMWare ESXi 6.0.0
  • Difficulty: Beginner/Moderate

Special Thanks To:

  • @rand0mbytez and @mrb3n813 for their tenacious help in beta testing, ironing out the bugs, suggesting better ways to do things, battling trolls and just generally being awesome.
  • @g0tmi1k, @_RastaMouse and the VulnHub crew for hosting VMs, encouraging VM creators/testers and being a tremendous resource to the infosec community.
  • @ReverseBrain for helping and testing with Vbox
  • My wife. She rules.

Breach: 2.1

mrb3n 15 Aug 2016

Second in a multi-part series, Breach 2.0 is a boot2root/CTF challenge which attempts to showcase a real-world scenario, with plenty of twists and trolls along the way.

The VM is configured with a static IP (192.168.110.151) so you'll need to configure your host only adaptor to this subnet. Sorry! Last one with a static IP ;)

A hint: Imagine this as a production environment during a busy work day.

Shout-out to knightmare for many rounds of testing and assistance with the final configuration as well as rastamouse, twosevenzero and g0blin for testing and providing valuable feedback. As always, thanks to g0tmi1k for hosting and maintaining #vulnhub.

VirtualBox users: if the screen goes black on boot once past the grub screen make sure to go to settings ---> general, and make sure it says Type: Linux Version: Debian 64bit

If you run into any issues, you can find me on Twitter: https://twitter.com/mrb3n813 or on IRC in #vulnhub.

Looking forward to the write-ups, especially any unintended paths to local/root.

Happy hunting!

SHA1:D8F33A9234E107CA745A8BEC853448408AD4773F

Note: v2.1 fixes a few issues.