What is Malware?
Malware (malicious software) is any program designed to harm, exploit, or gain unauthorized access to computers. Over 560,000 new malware samples are detected daily.
Types of Malware
Viruses
Self-replicating code that attaches to legitimate programs. Spreads when infected files are shared or executed.
Trojans
Disguised as legitimate software. Opens backdoors for attackers. Unlike viruses, trojans don't self-replicate.
Worms
Self-replicating malware that spreads across networks without user interaction. Can cause widespread damage quickly.
Spyware
Secretly monitors user activity, captures screenshots, logs keystrokes, and exfiltrates data.
Ransomware
Encrypts files and demands payment for decryption. See our detailed ransomware guide.
Rootkits
Hides deep in the operating system to maintain persistent access. Extremely difficult to detect and remove.
Keyloggers
Records every keystroke to capture passwords, credit cards, and sensitive information.
Protection Strategies
- Keep OS and software updated
- Use reputable antivirus/antimalware
- Don't download from untrusted sources
- Be cautious with email attachments
- Use a standard user account, not admin
- Enable firewall protection