HTB-CyberSanta-2021

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HTB-CyberSanta-2021

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Hayden Housen's solutions to the 2021 HackTheBox "Cyber Santa is Coming to Town" Competition

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# HHousen HackTheBox "Cyber Santa is Coming to Town" CTF 2021 Writeup

Write-ups for various challenges from the 2021 [HackTheBox 2021 Christmas CTF](https://ctf.hackthebox.com/ctf/249).

During the competition period, which was held from 01 Dec 2021 13:00 UTC until 05 Dec 2021 19:00 UTC, I placed **295th out of 8094** (**top 3.6%**) with a score of **3325/7875 points** and **11/25** challenges solved.

I have solved and written a writeup for all Web, Crypto, and Forensics. I did not solve or write guides for any Pwn or Reversing challenges.

## Web

* [Toy Workshop](Web/Toy%20Workshop/README.md) (Stored XSS)
* [Toy Management](Web/Toy%20Management/README.md) (SQL Injection)
* [Gadget Santa](Web/Gadget%20Santa/README.md) (Command Injection)
* [Elf Directory](Web/Elf%20Directory/README.md) (PHP File Confusion)
* [Naughty or Nice](Web/Naughty%20or%20Nice/README.md) (JWT "RS256 to HS256" then `nunjucks` SSTI)

## Crypto

* [Common Mistake](Crypto/Common%20Mistake/README.md) (RSA Common Modulus Attack)
* [Meet Me Halfway](Crypto/Meet%20Me%20Halfway/README.md) (Double AES Meet-in-the-middle Attack)
* [XMAS Spirit](Crypto/XMAS%20Spirit/README.md) (Affine Cipher Bruteforce)
* [Missing Reindeer](Crypto/Missing%20Reindeer/README.md) (Small RSA Public Exponent Attack)
* [Warehouse Maintenance](Crypto/Warehouse%20Maintenance/README.md) (Hash Length Extension Attack)

## Forensics

* [baby APT](Forensics/baby%20APT/README.md) (PCAP of Command Injection)
* [Honeypot](Forensics/Honeypot/README.md) (Memory Dump, Attacker Connected)
* [Persist](Forensics/Persist/README.md) (Memory Dump, Persistent Virus)
* [Giveaway](Forensics/Giveaway/README.md) (Word Macro Malware)
* [Ho Ho Ho](Forensics/Ho%20Ho%20Ho/README.md) (PCAP with Hidden Ethereum Address)

## Pwn

* [Mr Snowy](Not%20Completed/Pwn/Mr%20Snowy/README.md) *(Did Not Solve)*
* [Sleigh](Not%20Completed/Pwn/Sleigh/README.md) *(Did Not Solve)*
* [Naughty List](Not%20Completed/Pwn/Naughty%20List/README.md) *(Did Not Solve)*
* [Minimelfistic](Not%20Completed/Pwn/Minimelfistic/README.md) *(Did Not Solve)*
* [Music Notes](Not%20Completed/Pwn/Music%20Notes/README.md) *(Did Not Solve)*

## Reversing

* [Infiltration](Not%20Completed/Reversing/Infiltration/README.md) *(Did Not Solve)*
* [Gift Wrapping](Not%20Completed/Reversing/Gift%20Wrapping/README.md) *(Did Not Solve)*
* [Intercept](Not%20Completed/Reversing/Intercept/README.md) *(Did Not Solve)*
* [Upgraded](Not%20Completed/Reversing/Upgraded/README.md) *(Did Not Solve)*
* [Bamboozled](Not%20Completed/Reversing/Bamboozled/README.md) *(Did Not Solve)*

## Certificate

![HTB "Cyber Santa is Coming to Town" CTF Certificate](https://raw.githubusercontent.com/HHousen/HTB-CyberSanta-2021/master/Certificate-HHousen-Small.png)

HTB-CyberSanta-2021

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