Securing our devices against potential espionage.
1. Introduction In this article, we will provide guidelines on how to proceed in the event that we believe or suspect that any of our devices (computer or smartphone) are compromised, meaning that unauthorized individuals have unrestricted access to the device. The goal of this article is not to show the reader how to detect if their devices or accounts have been compromised (compromised by trojans) by third parties. Broadly speaking, there are certain signs that may lead us to suspect that something unusual is happening. Instances where the battery life of our smartphone suddenly becomes much shorter than usual, …
What should we do if we become victims of ransomware?
1. What is ransomware and what impact does it have? In this article, we will explore how to proceed in the event that our systems have been compromised by ransomware, something that has become quite common in recent times. Ransomware is defined as a type of malicious program (malware) that encrypts the computer data of infected machines and demands a ransom payment, usually in cryptocurrencies (Bitcoin, Monero, etc.), in exchange for removing this restriction and restoring data access to the victim. A ransomware attack can result in significant financial losses for companies. If they don’t have recovery plans in place …
Capture The Flag (CTF) Deloitte – CyberAcademy
1. Introduction and Objectives In this article, we will provide a solution to the “Deloitte-CyberAcademy” CTF, which features a variety of challenges similar to our CTF-1. You can download the CTF-1 from the following link: This is a virtual machine with a Linux operating system (hereinafter referred to as the “victim machine”) that presents a series of challenges that need to be overcome in order to capture all the flags. To carry out ethical hacking tasks, we are situated with our attacking machine in the same network segment as the victim machine. To achieve this, we have deployed both machines …
Publishing a website or files on the Deep Web using a Raspberry Pi anonymously (OnionShare).
1. Introduction and Objectives In this article, we will demonstrate how one can publish a website or a file-sharing space on the Deep Web (TOR network) using a Raspberry Pi, ensuring both security and anonymity. Throughout the project, we will encounter challenges that we must mitigate to the best of our ability while upholding the principles of security and anonymity. The main objective is to show readers how straightforward it is today for someone with basic systems knowledge to set up their own anonymous infrastructure for sharing information. Additionally, we will outline the measures to be taken in order to …
Attack Using BadUSB Devices or Rubber Ducky
1. Introduction and Objectives In this article, we will conduct a practical study on how an organization can be compromised using a BadUSB device, whether it’s inserted into a computer by an attacker with physical access to the victim’s system or by an unsuspecting user who falls victim to deception. We will get straight to the point without spending time on explanations about the technical features of these types of hardware or preparing Arduino IDE, as this information is readily available in numerous articles from other cybersecurity companies. In this article, our focus will be on programming a BadUSB using …
Capture The Flag CTF 2 Jaymon Security – Pentesting
1. Introduction and Objectives In this article, we will provide a solution to the second CTF (2.0) proposed by JAYMON SECURITY, which you can download from their website through the following link: This article simulates the execution of an ethical hacking audit, also known as a Pentest, on a Windows operating system machine belonging to the education department of a university (hereinafter referred to as the “business organization”), where an exam platform is located. To carry out the tasks of ethical hacking, we are situated with our attacking machine in the internal network segment of the business organization. Within this …
How to Create a Script for SQL Injection Testing
1. Introduction and Objectives In this article, we will briefly explain what a attack of this nature entails, and then we will demonstrate how to create a small script that automates certain SQL injection tests. To achieve this, you will need to have a basic understanding of databases and web programming. We will be using Kali Linux as the attacking machine. 2. What does a SQL injection (SQLi) attack consist of? A SQL injection attack essentially involves injecting malicious SQL code through a form with unsanitized input fields. Insufficient data sanitization leads to a vulnerability, and if this form connects …
Remote Desktop Attacks – Ransomware Entry
1. Introduction and Objectives In this article, we will briefly explain the methodology employed by certain criminal groups to gain access to computer systems by exploiting their Remote Desktop Services (RDP). This methodology for installing various types of malware has been observed in a large number of forensic analyses of ransomware attacks, and it’s not surprising considering the ease and nature of exploitation, as we will see throughout this article. To follow along, you will need to have at least basic knowledge of brute force tools and exploit launching. We will be using Kali Linux as the attacking machine. 2. …
Exploiting: Buffer Overflow (BoF)
1. Introduction and Objectives In this article, we will delve into the exploitation of a Buffer Overflow (BoF) vulnerability. We will utilize various tools to extract the required information through reverse engineering, enabling us to create the final exploit and gain access to the target machine. To accomplish this, a fundamental understanding of reverse engineering and programming in Python is essential. 2. Setting up the Lab To initiate this practice of exploiting a Buffer Overflow vulnerability, we will need to set up a laboratory with the following virtual machines and tools: Once the machines are set up, we verify that …
SPLUNK: The Ultimate SIEM for Control
1. Introduction and Objectives In this article, we will step into the shoes of a security analyst whose task involves detecting intrusions by analyzing the various log files generated by machines and devices, searching for abnormal behaviors. This is done to respond to potential incidents, establish appropriate policies and rules, and ensure their compliance. Additionally, this role includes the implementation of Security Information and Event Management (SIEM) systems. For this exercise, we will use the tool “Splunk Enterprise.” In the following sections, we will define this tool and its functionality, as well as briefly explore some use cases that can …
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