For decades, the standard advice for business cyber security was simple: install a good antivirus and keep it updated. But against modern, highly sophisticated cyber criminals, a traditional antivirus is about as useful as a screen door on a submarine.
If your business is still relying on basic, old-school antivirus software to protect your corporate network, you are vastly underprepared for today's ransomware. You need to upgrade to EDR.
How Old Antivirus Works (and Fails)
Traditional antivirus software is signature-based. It relies on a giant database of known bad files. When a file arrives on your computer, the antivirus checks the database. If there is a match, it blocks it.
The problem? Hackers know this. They now write "zero-day" malware - brand new viruses that have never been seen before and therefore aren't in any database. A traditional antivirus will look at a zero-day virus, shrug, and let it right through.
The Solution: Endpoint Detection and Response (EDR)
EDR does not rely entirely on a database of past threats. Instead, it acts like a security guard watching the behaviour of the programs on your computer.
If Microsoft Word suddenly tries to open a hidden command prompt, encrypt all your documents, and delete your shadow backups, an EDR system will recognise that this is highly unusual and malicious behaviour.
Stopping Attacks in Their Tracks
When an EDR system detects malicious activity, it doesn't just send an alert. It will instantly kill the process and isolate the computer from the network before the ransomware can spread. This level of automation is critical when dealing with fast-moving modern threats.
Why SMEs Need EDR Today
EDR provides behavioral analysis to catch never-before-seen variants of ransomware before they execute. It also offers automatic network isolation and forensic tracking, allowing your IT team to see exactly what a hacker touched.
Upgrade Your Defenses
EDR is no longer an "enterprise-only" luxury. It is a fundamental, non-negotiable requirement for any Australian SME that takes its data seriously. In fact, many cyber insurance policies won't even cover you unless you have EDR installed. EDR also works best when paired with a solid backup strategy — EDR stops the attack, backups ensure you can recover if it gets through.
Microsoft 365 Business Premium includes Microsoft Defender for Business, which provides genuine EDR. If you haven't reviewed your M365 security settings recently, the March 2026 M365 security reset guide covers what needs updating right now.
Not sure if your IT provider has equipped you with traditional antivirus or proper EDR? Our security assessment services will audit your endpoint protection and give you a clear roadmap to upgrading your defences.