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Threats & AttacksCritical

Malware

Malicious software designed to harm systems, steal data, or gain unauthorized access

Skill Paths:
Malware AnalysisThreat IntelligenceIncident ResponseSecurity Fundamentals
Job Paths:
Malware AnalystThreat Intelligence AnalystIncident ResponderSecurity Analyst
Relevant Certifications:
CEHGIAC GREMSANS FOR508CompTIA Security+
Content

What is Malware?

Malware (malicious software) is any software intentionally designed to cause damage to a computer, server, client, or computer network. It can steal sensitive information, disrupt operations, or gain unauthorized access to systems.

Common Types

  • Viruses – Self-replicating code that infects files
  • Worms – Self-propagating malware that spreads via networks
  • Trojans – Malicious code disguised as legitimate software
  • Ransomware – Encrypts files and demands payment
  • Spyware – Secretly monitors user activity

Prevention Strategies

  • Keep systems and software updated
  • Use reputable antivirus software
  • Be cautious with email attachments
  • Implement network segmentation
  • Train users on security awareness
Quick Facts
Severity Level
10/10
Types

Virus, Worm, Trojan, Ransomware, Spyware

Delivery

Email, downloads, USB drives, network

Purpose

Steal data, damage systems, gain access

Example

Phishing email with malicious attachment

Related Terms
Virus

Self-replicating malware that spreads by infecting files

Ransomware

Malware that encrypts files and demands payment

Trojan

Malware disguised as legitimate software

Learn More
Malware Analysis FundamentalsPreventing Malware Infections