News & Insights

Why hackers love bank holidays and what to do about it

Written by EBC Group | May 26, 2026 3:01:20 PM

While your team was enjoying the Bank Holiday weekend, somewhere out there an automated attack was scanning thousands of UK business networks for a way in. No human required.

There's a persistent myth about cyber attacks that needs putting to rest. The image of a lone hacker, hunched over a keyboard in a dark room, manually breaking into businesses one by one. It's outdated. It's been outdated for years. And clinging to it is leaving businesses dangerously exposed.

The reality in 2026 is that cyber attacks are automated, industrialised, and relentless. And bank holidays, like the one the UK just had on 25th May, are prime time for cyber attacks to take place.

The office goes quiet. The attacks don't.

Think about what happens when a bank holiday hits. Staff log off. IT teams are on skeleton cover or none at all. Nobody is monitoring inboxes, flagging suspicious activity, or picking up the phone to report something odd. The business is effectively unattended.

Attackers know this. They plan for it. And with modern AI-powered tools, they don't need to be sitting at a computer themselves, they simply set their automated systems running and let them work through the long weekend while everyone else is at a barbecue.

"It's no longer a lone hacker at a keyboard. It's automated systems running 24 hours a day, scanning thousands of businesses simultaneously, looking for the one that left a door unlocked."

 

What an automated attack actually looks like

Modern cyber attacks don't require expertise to launch — they require tools, and those tools are widely available. Here's what's happening to UK businesses right now, at scale, around the clock:

  • Phishing at scale
    AI generates thousands of convincing, personalised phishing emails in seconds. Your staff get back from holiday to a full inbox and one of those emails looks completely legitimate.

  • Brute force attacks
    Automated tools try millions of password combinations against your login portals continuously. No human patience required, just computing power and time.
  • Vulnerability scanning
    Bots scan the internet constantly for known weaknesses in software and systems. If your Microsoft 365 or network has a misconfiguration, it will be found.
  • Ransomware deployment
    Once inside, ransomware can encrypt your entire network quietly over a long weekend, with nobody around to notice until Monday morning.

What you can actually do about it

The good news is that the vast majority of successful attacks exploit preventable weaknesses. Businesses that take the basics seriously are dramatically harder to breach than those that don't and the basics are not as complicated or expensive as many assume.

The most important things to address are the ones attackers look for first: Microsoft 365 configurations that haven't been reviewed, accounts with weak or absent multi-factor authentication, former employees whose access was never removed, and networks with no active monitoring in place.

A business that has its fundamentals right, properly configured systems, active monitoring, and a team that knows what to do when something looks wrong is not an easy target. Attackers move on to easier prey.

The question to ask yourself is simple: if an attack started on a bank holiday Friday evening, how long would it be before anyone noticed?

Don't wait for a Monday morning surprise.

We offer a free, no-obligation consultation. A plain-English review of your environment that tells you exactly where the gaps are before someone else finds them.