Blog on crazyc4t's blog

Prompt Injection: Attacking AI Models

Sat, 01 Nov 2025 16:29:33 -0700

Hello everyone, due to the increasing popularity of AI models, prompt injection attacks have become a significant threat to their security. In this blog, we will discuss first what a prompt injection attack is in the first place, the implications of such attacks, attacking techniques, labs and resources to keep going from here.

I’m part of the SFU cybersecurity team that will compete to qualify for International Cybersecurity Challenge (ICC) on behalf of Canada. AI hacking would be a new type of CTF challenge that we will be preparing for.

Gophercise #1 "Quiz" Walkthrough!

Wed, 22 Mar 2023 11:59:47 -0500

What’s up guys! It’s crazyc4t here, once again, I’m sorry for not being fully active these past couple of weeks, but I’m here for you guys and I’m bringing you the best way to learn golang, and that is coding with it!

What is Gophercises?

Gophercises is a webpage made by Jon Calhoun, an experienced web developer with go, and we takes us through a series of exercises to code with golang making us improve our way to code in go by exploring topics like channels, concurrency, methods, using the standard library and more! The best thing of all is that is free! So you won’t lose anything trying it out, instead you will have tons of fun like I did!

I am studying for my JNCIA-JunOS and why you should do too!

Fri, 20 Jan 2023 11:14:01 -0500

My journey into getting JNCIA-JunOS certified!

Hello guys it’s crazyc4t once again, first of all happy new years!

I know I haven’t been active lately but this will change, starting with my lack of networking skills, I must need to admit, I’m not a fan of networking…

Why are you writing this blogpost then?

First, let me get you in the context…

My story with networking

As I said, I’m not a huge fan of networking, doesn’t mean that I don’t like it, it’s just that I prefer doing other things like ethical hacking and learn more about linux tho, but at one stage of ethical hacking I noticed the lack of my networking skills, since I understood everything that I was doing but very broadly, and I wanted to understand more deeply, so that’s why I went my way to get the CCNA, started with Jeremy’s IT labs course that is truly awesome really is a great resource but, for me it didn’t clicked and just felt boring and not aligned with what I wanted, so I left CCNA and started studying a lot of stuff that lead me to not certify myself in months, in a blank space where I didn’t knew where to go or to do, but I got a job in cybersecurity and it was awesome! And that made me acknowledge that I’m good and I like cybersecurity and blue team operations, that is my thing!

Elk stack once and for all!

Tue, 06 Dec 2022 14:34:23 -0500

Welcome to this quick guide on using the ELK stack, specially Elastic’s Kibana interface to search, filter and create visualizations and dashboards, taking as an example the investigation of vpn logs for anomalies.

Is a collection of different open-source software developed by Elastic, linked together to take data from endpoints (computers, networks, any source in particular) in any format and being able to perform a search, analyze and visualize the data in real-time.

Mr Robot CTF

Sun, 06 Nov 2022 08:42:00 -0500

Welcome to a new machine walkthrough!

Now it’s the time for this awesome machine that is the Mr Robot room in Try Hack Me!

Enumeration

First my own methodology that I’m working with is to make Nmap scans, while doing some gobuster’s directories discoveries, so let’s go step by step.

Nmap

sudo nmap -sS -Pn -T5 -p- -vvv --open 10.10.112.68 -oG allPorts With the -vvv triple verbosity flag we know already open ports without the scan being finished, giving us a bit of time to work.

Deep dive into nmap

Sat, 05 Nov 2022 13:17:13 -0500

When it comes to hacking, knowledge is power, the more you know, the more options you have to attack, making critical a proper enumeration before any type of exploitation.

Before attacking our target we need to know what is what we are about to attack, we need to know what type of services or OS is running, and we can accomplish that by making a network map, hence the name of Nmap, specifically doing “port scanning”, because these services are listening on a specific “ports” of the network, being ports a network structure your service runs on to establish a connection, the service are always “listening” (waiting for another device that wants to establish a connection) and the user when connecting to the specific port they open a port for receiving information from the other port (for example: HTTPS 443)

Pickle Rick CTF

Thu, 27 Oct 2022 19:18:39 -0500

Hello world! I’m back again with a new blogpost, related to hacking! am preparing myself for the eJPT so I’m taking tons of machines while taking the learning paths from Try Hack Me, specifically the “Pre-Security”

This Rick and Morty themed challenge requires you to exploit a webserver to find 3 ingredients that will help rick make his potion to transform himself back into human from a pickle!

Room link

Boss of the SOC walkthrough

Tue, 18 Oct 2022 13:03:09 -0500

Starting point

Download Boss of the SOC VM from the THM room
Import the VM with VirtualBox
In the host machine, navigate to localhost:8000

Mission of the CTF

The mission is to look for certain data using the SPL (Splunk Processing Language) being the flags, data.

Boss of the SOC is a blue-team CTF that helps you enhance your hunting and analysis skills.
You will use Splunk and other tools to answer a variety of questions about security incidents that
have occurred in a realistic but fictitious enterprise environment. It’s designed to emulate how
real security incidents look in Splunk and the type of questions analysts have to answer. The
objective is to recreate the life of a security analyst facing down an adversary at all stages of an
attack.

How to play Overwatch 2 in linux

Sat, 08 Oct 2022 13:07:44 -0500

Hello guys! First of all, thanks for reading my blog, overwatch 2 has been released and it’s time for us to try it!

Playing it on linux is really simple, so feel free to follow along!

I’m using arch linux when following this guide, if you are not running arch linux as your linux distribution, don’t worry! Just make sure everything is up-to-date with your system.

Installing the requirements

First of all we need to install:

Using namecheap domain with github pages!

Fri, 02 Sep 2022 18:45:39 -0500

Hello everyone! It’s crazyc4t once again, I have some news, I changed my domain! There is no more saidneder.tech, now it’s crazyc4t.xyz since my saidneder.tech domain was really expensive for renewal and I felt that it was my mistake because of the company that I chose to buy my domain from, that is HostGator, which I totally don’t recommend, difficult to use and configure, expensive, and not friendly at all, so instead of renewing my old domain I bought a new one in namecheap.com! and It was awesome, I deployed my blog to my new domain with https encryption in less than 30 minutes! And that was because of the wait time to generate the security certificate, so in this post am going to show you how to use your domain bought from namecheap with github pages!

Programming with go!

Sun, 28 Aug 2022 13:25:00 -0500

How to start programming with Go

Hello guys it’s crazyc4t once again, sorry for being a bit distant on my blog but prepare yourselves because there’s more content in the oven!

I disappeared but with a purpose, I was laser-locked focused learning go! And it is really fun, but first…

What is go?

Go is an open-source programming language supported by Google, created by Ken Thompson and Rob Pike, the creators of the UNIX operating system, made for Google-sized problems, being Go a static fast-compiled language, that includes native concurrency, garbage collection and efficiency at scale.

How I passed the compTIA A+

Wed, 20 Apr 2022 12:10:12 -0500

Guide to conquer compTIA A+

This is the guide to conquer compTIA A+ made by Said Neder, this is what am doing to study and get certified!

Here I documented everything that I learned when preparing for the exam, this are my notes to study and remember what I did, and I passed!

Am taking this exam on 11th and 13th of april, 2022!

What is compTIA A+? Is the Computing Technology Industry Association, being vendor-neutral, they have been around since the 80’s. The A+ is a test designed for IT technicians anywhere from 6-9 months of experience, being one of the most popular certification.

What to do after installing Fedora KDE

Tue, 01 Mar 2022 20:59:45 -0500

Welcome again to my blog, it has been a bit of a long time isn’t it? But am back once again! And more active than ever so expect so more blogposts coming your way!

Why am running fedora

As some of you know, I was using Arch Linux with a window manager or “WM” for simplicity, (If you want to see my dotfiles, here’s the repo) and It was great! But am on a Laptop, and I needed something more easier to setup since I didn’t had the time and in some situations where I needed to take my laptop with me I needed to install some packages and read the wiki, etc for order to make a specific printer work, for example, so it wasn’t practical and I just needed something that just worked, bleeding-edge, and a distro that had good documentation and promotes new solutions, and there is where Fedora takes place, since I want to learn how to administrate Linux Servers based on Red Hat being the company that sponsors the fedora project, it was a perfect fit for me! So in that way I can learn more about DNF (The package manager), Selinux, BTRFS, ZRAM and all of this greatest and latest tech work!

How to code your own discord bot!

Fri, 11 Feb 2022 11:19:06 -0500

Patrick Star Bot 📕

This is my first time programming a bot on discord with discord.js! This bot is about having my classes at my fingertips, so it gives links with special commands that facilitate the process. You are free to clone the code and use it the way you want! You can edit it and make it your own!

Commands

Prefix: 9

The prefix means that is the initial character that is used to communicate with the bot!

LaTeX for humans

Wed, 19 Jan 2022 17:22:31 +0000

Intro

This post is going to help you learn \(\LaTeX\) and convert you into a intellectual and scientific professional and by far superior with anyone that shares their report made in word!

But before anything…

What is all this \(\TeX\) thingy?

In summary \(\LaTeX\) is the form of creating a document with the highest quality of typesetting possible, being made with commands you will have to compile it each time to see the result so \(\LaTeX\) isn’t a WYSIWYG(what you see is what you get) editor, but don’t worry! \(\LaTeX\) is so awesome now that a quick CTRL+S will compile your result and let you see how you are going on time! so no worries there. The story goes back to 1977 when Donald Knuth understood the need for a high quality typesetting program, and \(\LaTeX\) being still used today shows that is the best tool for it’s purpose, although many useful additions have been made and \(\LaTeX\) has evolutionated since then.

Vim for everyone!

Sun, 09 Jan 2022 22:00:04 -0500

Intro

This is a vim-neovim tutorial, is a highly-configurable text editor that you can make it as you wish, and the way to use it is only with the keyboard and keybindings and learning it will improve your productivity at a whole other level, and it is included in every UNIX system and Mac OS, so if you configure servers remotely or work a lot in the terminal is really important to use vim, and you can add plugins and make a lot of cool stuff with it!

How to free yourself by installing linux

Sun, 21 Nov 2021 01:40:22 -0500

Intro

This is a special blogpost since this is the guide to switch from windows to linux for new users, and the way to free them of propietary software and enjoy their freedom with free software, the software you should run!

We are going to divide this guide in steps:

Intro

For the FAQ’s I made a blogpost that covers this questions:

What is Linux?
What is GNU?
What is GNU/Linux?

How to customize your terminal!

Sun, 14 Nov 2021 19:55:31 -0500

Intro

This is a tutorial-type of blogpost, sorry for being away so long, but there’s a lot of blogposts coming to your way, so expect some new ones!

What we want to achieve in this tutorial:

To have a fast terminal emulator
To have a better shell with auto-completition
To have a cool-looking with color scheme terminal

So let’s start with that!

Alacritty, the fastest openGL terminal emulator

Alacritty is the fastest terminal emulator out there, and the best of all is that is cross-platform! so you can install it on windows too! Although this guide is more toward linux users but if you are here from windows you can follow along too!

What is GNU + Linux? Why should you care?

Wed, 22 Sep 2021 18:58:53 -0500

Intro

Am going to talk about one of my favourite things in the world, what lead me to where I am today, Linux, the open-source operating system created by the community!

What is linux?

You use Linux everyday, without even noticing, you are using linux right now!! since this webpage is hosted on github, and github is hosted on azure that is the cloud computing service that microsoft offers, that their servers are based on linux, you see the connection? Linux is everywhere! and you can’t escape it, linux is on your cars, roku devices, servers, super computers, android phones, smart devices, and we can go like this for hours, but answering the real question