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0day — Writeup

0day — Writeup

TryHackMe Challenge Link: http://tryhackme.com/room/0day “0day” is a room conceived and built primarily by TryHackMe’s very own 0day, with a little help from myself in the execution, troubleshooting and provision of a writeup. This is a great little box designed to demonstrate the dangers of not frequently updating your servers! Both of the vulnerabilities demonstrated in this room cover topics that are not commonly seen on TryHackMe, so hopefully you’ll enjoy the box! Enumeration Let’s begin, as usual, with a scan…

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Year of the Fox — Write-up

Year of the Fox — Write-up

TryHackMe Challenge Link: https://tryhackme.com/yotf Year of the Fox is the second box in what is now my New Year series of challenge boxes. Following on from Year of the Rabbit, this box is a lot harder, and will require knowledge across a variety of different areas. This box was initially used in a celebratory competition marking the first 100,000 members on the TryHackMe platform, and is now a standalone box on the site. The writeup was also published on the…

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Tomghost — Write-up

Tomghost — Write-up

TryHackMe Challenge Link: https://tryhackme.com/room/tomghost Tomghost is an interesting CTF from Stuxnet; it has rather an unusual section after gaining RCE, which makes for a nice break from standard CTF challenges. In this room we’ll be exploiting a vulnerability in Ghostcat and exploring ASCII armour protected PGP encryption keys, followed by a nice easy privilege escalation up to root. Let’s begin! Enumeration: We begin, as always, with enumeration of the machine. Let’s start with an nmap scan: Great, so, we have…

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Inclusion — Write-up

Inclusion — Write-up

TryHackMe Challenge Link: https://tryhackme.com/room/inclusion Inclusion is a really nice introduction to Local File Inclusion. The room is written by falconfeast, or mzfr as he’s otherwise known. This will be a quick write-up, but hopefully it will make clear anything that you might be struggling with in this room. As a bonus, I’ll also include the really quick, unintended method at the end of this write-up, but please, do it the intended way first. Let’s get started! Enumeration: Well worth doing…

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Learn Linux — Write-up

Learn Linux — Write-up

TryHackMe Walkthrough Link: https://tryhackme.com/room/zthlinux Learn Linux is a great introductory room from Paradox. As the name suggests, it gives a nice foundation for Linux skills. This is a walkthrough room, so I’m not going to go into a huge amount of detail about the concepts themselves — I’ll leave that in Pars’ capable hands. Instead I’m going to be focusing on the questions, and how to answer them. By this token, I will be bypassing the tasks which don’t actually…

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NoName CTF — Write-up

NoName CTF — Write-up

TryHackMe Challenge Link: https://tryhackme.com/room/nonamectf NoName CTF is a great little CTF from stuxnet. It provides a really nice introduction to some often lesser-used topics in challenge boxes, including SSTI and BOF, making this a perfect box to get some practice in on! Without further ado, let’s begin! Enumeration As per normal, we’re going to begin this challenge with an nmap scan: We’ve got four ports open here. Nothing unusual about port 22 — just SSH as normal. We can’t bruteforce that…

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Willow CTF — Write-up

Willow CTF — Write-up

TryHackMe Challenge Link: https://tryhackme.com/room/willow Willow is the third box I’ve written, but the second to be publicly released. The first two — Jack-Of-All-Trades and Year of the Rabbit — were both designed for specific events, but they will hopefully be released on TryHackMe in due course. This particular box was designed when I was in a very specific frame of mind, which is reflected in the slightly ethereal nature of the theme. Brownie points if anyone can identify where the…

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CherryBlossom CTF — Write-up

CherryBlossom CTF — Write-up

TryHackMe Challenge Link: https://tryhackme.com/room/cherryblossom CherryBlossom is my fourth CTF Challenge Box. It focuses heavily on cryptography and file manipulation, but also contains lateral movement and a privesc once the machine itself is compromised. Let’s begin. Initial Enumeration: We start, as always, with an nmap scan to see what services we have available to us: Three open ports, all standard. We have SSH running on Port 22 — there’s nothing we can do with this for now; not without at least…

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