System Based Attacks - CYBER SECURITY
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This document discusses system-based cyber attacks. It was written by Souma Maiti, a 4th year computer science student, for their cyber security course. The document defines system-based attacks as those intended to compromise computers or networks. Specific attacks discussed include viruses, worms, Trojan horses, backdoors, and bots. Viruses replicate malware across files, worms replicate across computers like viruses, Trojan horses mislead users while performing malicious actions, backdoors bypass authentication, and bots are automated processes that interact with networks, some maliciously.
System Based Attacks - CYBER SECURITY
- 1. Department of Computer Science & Engineering Topic : System Based Attacks Name: Souma Maiti Roll No. : 27500120016 Subject: Cyber Security Subject Code : PEC-CS702E Year : 4th Year Semester: 7th
- 2. INTRODUCTION • A cyber-attack is an exploitation of computer systems and networks. It uses malicious code to alter computer code, logic or data and lead to cybercrimes, such as information and identity theft. • We are living in a digital era. Now a day, most of the people use computer and internet. Due to the dependency on digital things, the illegal computer activity is growing and changing like any type of crime.
- 3. System Based Attacks These are the attacks which are intended to compromise a computer or a computer network. Some of the important system-based attacks are as follows- 1. Virus It is a type of malicious software program that spread throughout the computer files without the knowledge of a user. It is a self-replicating malicious computer program that replicates by inserting copies of itself into other computer programs when executed. It can also execute instructions that cause harm to the system.
- 4. 2. Worm It is a type of malware whose primary function is to replicate itself to spread to uninfected computers. It works same as the computer virus. Worms often originate from email attachments that appear to be from trusted senders.
- 5. 3. Trojan horse It is a malicious program that occurs unexpected changes to computer setting and unusual activity, even when the computer should be idle. It misleads the user of its true intent. It appears to be a normal application but when opened/executed some malicious code will run in the background. 4. Backdoors It is a method that bypasses the normal authentication process. A developer may create a backdoor so that an application or operating system can be accessed for troubleshooting or other purposes. 5. Bots A bot (short for "robot") is an automated process that interacts with other network services. Some bots program run automatically, while others only execute commands when they receive specific input. Common examples of bots program are the crawler, chatroom bots, and malicious bots.