Why your antivirus isn't actually protecting you

For years, antivirus software was the cornerstone of business security. Install it, keep it updated, and you're protected — or so the thinking went. That assumption is now dangerously outdated.

Modern cyber attacks don't rely on the file-based malware that traditional antivirus was built to catch. Today's threats are identity-based: attackers steal credentials through phishing, buy them on the dark web, or brute-force weak passwords. Once inside, they move laterally through your network using legitimate tools already installed on your systems. Your antivirus never fires because, technically, nothing malicious was downloaded.

Ransomware operators have also evolved. Many now use 'living off the land' techniques — leveraging built-in Windows utilities like PowerShell and remote desktop to encrypt your files. By the time a signature-based scanner recognises the threat, your data is already locked and the ransom note is on your screen.

Real protection in 2026 requires layers: endpoint detection and response (EDR) that watches for suspicious behaviour, not just known signatures; 24/7 security operations centre (SOC) monitoring to catch threats as they develop; multi-factor authentication to stop credential theft; and regular patching aligned to the Essential Eight. Otaris builds all of these into every plan — because antivirus alone hasn't been enough for years.

If your current IT provider still talks about antivirus as your primary defence, it's time for a conversation. Get a free Essential Eight Cyber Security Scorecard to see where your real gaps are.