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 …
Analysis and Reverse Engineering of a Banking Trojan Malware from the Zeus Family
1. Introduction and Objectives In this article, we will demonstrate how to conduct a reverse engineering analysis of a banking trojan from the Zeus family. For our study, we have been provided with a single binary file named “fichero.bin.” You can download it from the JMSec GitHub repository: To undertake a study of this nature, you’ll need some basic knowledge of reverse engineering. 2. Setting Up the Laboratory and Description of Materials To begin the exercise, it should be noted that the analysis of the binary is conducted under the Windows 10 operating system. The following list enumerates the tools …
REVERSING: Study and programming of a KEYGEN.
1. Introduction and Objectives In this article, we are going to superficially explain how certain software licenses are generated. To do this, we will study a particular code, with the aim of subsequently programming a key generator that can generate a correct key from any text string. For this, we will need to have at least basic knowledge in assembler programming (ASM), and in reverse engineering. As tools, we will use the OllyDbg debugger and the DevCpp compiler to program the key generator (Keygen) in C/C++. If you are interested in conducting a cybersecurity audit of your applications, you can …
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