Full Definition
What is Malware?
Malware (malicious software) is any software intentionally designed to cause damage to a computer, server, client, or network. It encompasses various types of harmful programs used by attackers to compromise systems and data.
Types of Malware
Viruses
- Self-replicating code
- Requires host file
- Spreads when executed
Worms
- Self-propagating
- No host file needed
- Network spreading
Trojans
- Disguised as legitimate
- Backdoor access
- Not self-replicating
Ransomware
- Encrypts files
- Demands payment
- Double extortion variants
Spyware
- Monitors activity
- Steals information
- Keyloggers
Adware
- Displays unwanted ads
- Often bundled
- Privacy concerns
Infection Vectors
- Phishing emails
- Malicious websites
- Software vulnerabilities
- Removable media
- Supply chain compromises
Detection Methods
Signature-Based Known malware patterns.
Behavioral Analysis Suspicious activities.
Heuristic Analysis Code characteristics.
Machine Learning Pattern recognition.
Protection Strategies
Prevention
- Antivirus/EDR
- Email filtering
- Web filtering
- Patch management
Detection
- Real-time scanning
- Behavioral monitoring
- Network analysis
Response
- Isolation
- Remediation
- Forensics