The Plain English Version
Malware is short for malicious software - any program designed to damage, disrupt, or gain unauthorised access to your systems. It is the umbrella term for viruses, trojans, worms, ransomware, spyware, and other nasty software.
Malware can steal your data, encrypt your files for ransom, spy on your activities, or use your computers to attack others. It is one of the most common threats businesses face.
Common Types of Malware
Virus: Attaches to files and spreads when those files are shared
Trojan: Disguises itself as legitimate software
Worm: Self-replicates across networks without user action
Ransomware: Encrypts files and demands payment
Spyware: Secretly monitors your activities
How Malware Gets In
- Email attachments - Malicious files disguised as invoices, documents
- Phishing links - Links to websites that download malware
- Infected websites - Drive-by downloads from compromised sites
- USB drives - Infected removable media
- Software downloads - Pirated or compromised software
- Unpatched vulnerabilities - Exploiting known security holes
Protection Basics
Modern endpoint protection is essential - it goes beyond traditional antivirus to detect malware based on behaviour, not just signatures. But technology alone is not enough.
User awareness is critical. Most malware requires someone to click something, open something, or download something. Training staff to recognise suspicious emails, links, and attachments prevents most infections.
If You Get Infected
Isolate the affected system immediately - disconnect it from the network. Do not turn it off (you may destroy evidence). Contact your IT support or incident response provider. For ransomware, do not pay without expert guidance - there is no guarantee you will get your data back.