15 Jun 2026

Internet and Network Attacks

 

Malware

Malware means malicious software designed to harm computers.


Types of Malware

MalwareDescription
AdwareDisplays advertisements
RansomwareLocks files and demands payment
RootkitHides malicious activities
SpywareSecretly collects information
Trojan HorseDisguised as legitimate software
VirusReplicates and damages systems

Botnet

A group of infected computers controlled remotely.

These computers are called:

Zombie computers

Used to attack other systems.


Denial-of-Service (DoS)

Overloads a server so legitimate users cannot access services.

Distributed DoS (DDoS)

Many infected devices attack simultaneously.


Spoofing

Pretending to be someone else.

Examples

  • Fake email addresses
  • Fake IP addresses

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