I’m a data-driven tech enthusiast with a solid background in computer science and hands-on experience in data analytics, AI, and machine learning. I thrive on turning raw data into actionable insights, building predictive systems, and creating smart tools that solve real-world problems.
Skilled in Python, SQL, Power BI, and Tableau — I’ve led projects across industries like cybersecurity, IoT, and aviation, always focused on impact, innovation, and integrity.
title: “Picoctf Forensics” date: 2025-06-11T12:32:25+03:00 section: “ctf” categories: [“ctf”, “picoctf”] title: Verify date: 2025-01-14 author: Nicos draft: false tags: Description People keep trying to trick my players with imitation flags. I want to make sure they get the real thing! I’m going to provide the SHA-256 hash and a decrypt script to help you know that my flags are legitimate.
Additional details will be available after launching your challenge instance.
title: Verify date: 2025-01-14 author: Nicos draft: false tags: Description People keep trying to trick my players with imitation flags. I want to make sure they get the real thing! I’m going to provide the SHA-256 hash and a decrypt script to help you know that my flags are legitimate.
Additional details will be available after launching your challenge instance.
Additional details: ssh into the launched instance ssh -p 53041 ctf-player@rhea.
title: SQL Injection 💉 date: 2024-12-09 draft: false tags: 1. What is SQL? SQL is a standardized (ANSI in 1986, ISO in 1987) programming language which is used for managing relational databases and performing various operations on the data in them.
Example SQL table containing employee data; the name of the table is ‘employees’:
userid first_name last_name department salary($) auth_tan 32147 Paulina Traves Accounting 46.
title: Wireshark Malware Analysis date: 2025-02-7 author: Nicos draft: false tags: Quiz Question Review the pcap and answer the following questions for this month’s Unit 42 Wireshark quiz:
When did the malicious traffic start in UTC? based on the first DNS interaction we can see the ip 192.168.1.27 What is the victim’s IP address? by visiting the statistics part of wireshark and going to the conversation section and selecting ipv4 you can see that ip addr 192.
title: Docker setup 🐳 date: 2024-05-06T12:43:45+03:00 author: Nicos draft: false tags: Docker Installation on Linux 🐋 Prerequisites:
64-bit Linux system: Verify using uname -m. If it outputs x86_64 or amd64, you’re good to go. Virtualization support: Check if your system supports hardware virtualization technologies like KVM. Refer to your distribution’s documentation for details. Steps:
Update package lists: Bash sudo apt update # For Debian/Ubuntu-based systems sudo yum update # For Red Hat/CentOS-based systems Install dependencies: Bash sudo apt install apt-transport-https ca-certificates curl software-properties-common # For Debian/Ubuntu-based systems sudo yum groupinstall "Development Tools" # For Red Hat/CentOS-based systems Add Docker repository (choose one based on your distribution): Debian/Ubuntu: