© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2021
A. SheikhCertified Ethical Hacker (CEH) Preparation Guidehttps://doi.org/10.1007/978-1-4842-7258-9_5

5. Trojans, Backdoors, Viruses, and Worms

Ahmed Sheikh1  
(1)
Miami, FL, USA
 

A number of malicious programs contain features of viruses, worms, Trojans, and rootkits. These malicious programs are written for a number of reasons including pranks, financial gains, or to distribute political messages. In this chapter, you will learn the various ways a Trojan can infect a system, specific countermeasures to be aware of, and how to recognize a virus, including virus detection methods and countermeasures.

By the end of this chapter, you will be able to
  1. 1.

    Explain how ...

Get Certified Ethical Hacker (CEH) Preparation Guide: Lesson-Based Review of Ethical Hacking and Penetration Testing now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial