Overview of Network Threats: Malware, Phishing, DDoS, Social Engineering, Ransomware

Study Notes

Network Threats can take many forms, from commonplace viruses and trojans to sophisticated exploits targeting your network's security vulnerabilities. These threats come in various shapes and sizes, including Malware, Phishing, Distributed Denial of Service Attacks (DDoS), Social Engineering, and Ransomware. Here is an overview of each threat type:

Malware

Malicious software (malware) includes viruses and worms designed to disrupt computer operations, gather sensitive information, or gain access to private computers. Computer virus writers often sell their creations to criminals who want to spy on users, steal passwords, or hijack systems.

Phishing

Phishing targets users by sending out emails with fake links or attachments that try to trick people into revealing personal information like login credentials or financial details. It compromises user accounts, steals data, manipulates cryptocurrency transactions, spreads spam, and conducts illegal activities such as money laundering. Cybercriminals create convincing email messages with authentic logos, colors, font styles, and layouts to look like legitimate correspondence, making it difficult for recipients to detect them.

Distributed Denial of Service (DDoS) Attacks

A DDoS attack overloads a targeted server or network, rendering it unavailable to its intended users. This can lead to downtime and significant losses if customers cannot reach you online during an outage. One technique cybercriminals used was to send thousands of requests to a website to flood its servers until they crashed, effectively shutting down the victim site while also using up bandwidth and resources.

This form of attack involves manipulating individuals through psychological means rather than technical ones, leading victims to unwittingly give away confidential information or perform actions to benefit the attacker. Social engineers attempt to deceive their targets into thinking their request is genuine when it actually serves some nefarious purpose. For example, a criminal might impersonate someone else and ask for help with something important so that you feel compelled to comply without question.

Ransomware

Ransomware encrypts files stored on a hard drive, preventing normal operation unless the owner pays a fee demanded by the hackers. A typical scenario begins with an infected file being opened, which runs code that searches for all the hard disk drives connected to the machine. If any are found, those disks are scanned for specific types of files commonly found on home computers—such as .doc, .pdf, and image files — that may contain valuable data such as photos or documents. Once identified, these files are encrypted so that they become useless to the original owners until the appropriate decryption key is obtained.

In summary, networks face multiple kinds of threats ranging from simple viruses to highly complex extortion schemes. Each requires different defensive measures tailored to the nature of the threat itself. By understanding these threats, organizations can better protect themselves against potential intrusions and damage caused by malicious activity.

Description

Learn about common network threats like Malware, Phishing, Distributed Denial of Service Attacks (DDoS), Social Engineering, and Ransomware. Understand how each threat type operates and the potential risks they pose to your network security. Enhance your knowledge of defensive measures against varying types of cyber threats.