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May 15

CCSC 2022 Writeups — Glooties App

This was the only mobile chall on this CTF. We start by installing the APK and opening it. At first glance, there’s not much to be done, since there’s only a login screen, for which we have no credentials (yet). We notice that there are 2 flavors of the application…

Ctf

3 min read


Apr 22, 2021

CCSC 2021 Writeups — Neuralmate

Description: Benny is showing off again… intelligence is a trait of his, but so is laziness. This time he came up with a neural network for recognizing the position of chess pieces on the board for him without even looking. He gave you 3 boards and challenged you to beat…

4 min read

CCSC 2021 Writeups — Neuralmate
CCSC 2021 Writeups — Neuralmate

Apr 20, 2021

CCSC 2021 Writeups — Lucky Moves

Lucky Moves Lucky Moves was a blockchain challenge. In the challenge, we were given a TCP socket to connect to, along with a zip file containing the python script behind the TCP socket, and a file called LuckyMoves.sol. When connecting to the TCP socket, we are presented with the actual challenge description…

4 min read

CCSC 2021 Writeups — Lucky Moves
CCSC 2021 Writeups — Lucky Moves

Jan 11, 2020

Creating a systemd service for a Flask application

Systemd allows for files to be run as services, meaning that they are automatically started on startup, and more generally managed by systemd, including logs, restart on errors, and support for many features. So, let’s make a server! For this, I will use a Flask application (this app shows the…

Python

2 min read

Creating a systemd service for a Flask application
Creating a systemd service for a Flask application

Jan 6, 2020

Setting Up virt-manager on Fedora

In this post, I will be going through the installation and configuration process of virt-manager on Fedora. I will be doing this inside a clean installation of Fedora Workstation on a virtual machine inside Virtualbox from my Arch Linux installation. Virt-manager is a graphical frontend that is used in conjunction…

Linux

4 min read

Setting Up virt-manager on Fedora
Setting Up virt-manager on Fedora

Jan 6, 2020

Experience of Isolating two VMs from outside world

As part of Google Code In, I am completing the task of having two VMs communicate with each other, but be completely isolated from the host PC and host network. The first way that I thought of doing this was using a firewall, which would only allow connections to and…

Linux

3 min read

Experience of Isolating two VMs from outside world
Experience of Isolating two VMs from outside world
Christos Falas

Christos Falas

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