Netcat, Cryptcat, and Ncat: The Swiss Army knives of hacking.
Introduction and objectives We are going to study the functioning and behavior of these tools, which provide the pentester with a range of opportunities in system auditing. You can download them from the following links: In the practical exercise we are going to perform in this article, we will learn how to obtain a remote machine’s command shell by using these tools. Subsequently, we will also conduct a study of the network traffic generated using each of these tools, with the aim of understanding communication security. Obtaining a “bind shell” in a LAN. a) Machines used for the practice To …
Analysis of the EvilPDF tool
Description and installation of EvilPDF We are going to study the operation of this tool, which provides the user with the ability to embed an executable file in a PDF document. In its Github repository it is defined as such, although it is not really the most accurate definition, as we will see throughout the analysis. The tool can be found in its github repository. https://github.com/JAYMONSECURITY/evilpdf As we can see below, the project consists of several files, the most important of which are the following: The first thing we are going to do is to follow the instructions to download …
Understanding a DNS Spoofing + Phishing Attack
What is a DNS Spoofing and Phishing attack? The term “Spoofing” refers to “spoofing” carried out by a cyber attacker using various techniques to falsify data in a communication. Thus, a DNS spoofing attack is the forgery of an IP address (spoofing) when a name resolution query is made to the Domain Name System (DNS). Therefore, if we launch a “DNS Spoofing” (Domain Name System) attack, what we are doing is that, when the victim enters a web address (domain name) in their browser, such as “www.google.com”, this is redirected to another web address (to another domain name) previously established …
Understanding a DNS Spoofing Attack + Evilgrade
What does this type of attack consist of? One of the most dangerous attacks that we can encounter is the self-downloading and execution of malicious software without user interaction. With an attack of these characteristics an intrusion can be made in any type of system, even if it is at its last version and completely patched, not presenting any type of vulnerability more than the one that represents in itself the ignorance of the own user. Design of the attack and tools used To demonstrate this attack we are going to use the “Evilgrade” framework. As a brief description of …
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