Let’s be honest. Most of us scroll past online ads without a second thought. And when we do click on one, we often assume it’s safe. After all, if it’s showing up on a trusted website, how bad could it be?
But that’s exactly what scammers want you to believe.
A growing number of cyber attacks are now being delivered through what’s known as malvertising (malicious advertising). These aren’t dodgy pop-ups from the early days of the internet. Modern malvertising campaigns are slick, professional-looking, and incredibly dangerous.
What is malvertising?
Malvertising involves using digital ads to trick people into downloading harmful software, visiting fake websites, or giving away sensitive information. And it’s not just an issue for personal devices. Businesses of all sizes are being actively targeted.
Here’s the scariest part: sometimes you don’t even need to click the ad. Just loading the page can be enough for malware to silently install itself in the background, especially if your browser is out of date.
The most common malvertising attacks
Cybercriminals use a range of clever techniques to lure in victims. Here are three of the most widely used methods:
1. Scam-based malvertising
You might see an ad warning that your device is infected or your data has been compromised. It urges you to call a phone number for “tech support”. If you do, the scammer on the other end will try to talk you into installing remote access software. And this gives them full control of your machine. They might then charge you a fee to “fix” the issue or steal data from your system while you watch.
2. Fake installer traps
Some ads mimic real companies, leading you to lookalike websites that seem trustworthy. You think you’re downloading a well-known app or update, but what you’re actually installing is malware. These clones are often so convincing that even experienced users don’t spot the difference.
3. Drive-by downloads
This is one of the sneakiest types of attack. You don’t need to click anything. Just visiting a compromised page with an old browser or unpatched system can trigger a silent download. The malware installs itself in the background without you even noticing.
Why your business should be concerned
These attacks don’t just target home users. Employees browsing the web during lunch, researching suppliers, or clicking ads on social media can easily fall into one of these traps. And bring malware straight into your company’s network.
From ransomware to spyware, once malvertising takes hold, the damage can be significant. Data can be stolen, systems locked, or credentials harvested. All from a single, innocent-looking click.
How to stay protected from malvertising
The good news? You don’t have to swear off online ads forever. But you do need to take a few important steps to lower your risk.
✅ Keep browsers and systems up to date
The majority of drive-by attacks exploit known vulnerabilities in outdated software. Regular updates close those security gaps and make it much harder for malware to slip through.
✅ Think twice before clicking
If an ad seems too good to be true, or is full of urgency and fear language, pause before you interact. Real companies don’t tell you your computer’s infected through banner ads.
✅ Double-check the destination
Before you click on any link or download software, hover over it to check where it goes. If the domain name doesn’t look quite right, or there are odd spellings or symbols, don’t risk it.
✅ Train your team
Your employees are on the front line. If they can spot suspicious ads and know how to react, they’ll be far less likely to fall for a scam. Regular awareness training and clear policies can make all the difference.
✅ Use advanced cyber protection
A modern security stack that includes ad-blocking, endpoint protection, and real-time threat monitoring will help to catch dangerous content before it causes harm.
A healthy dose of scepticism is your best defence
Cybercriminals rely on trust. They design malvertising to blend in and catch you off guard. But with the right knowledge and a bit of caution, you can stop these scams in their tracks.
So next time an ad flashes up on your screen offering a free antivirus scan or a software update, don’t take it at face value. Pause. Check. Ask.
Nxt Steps
Worried about your team falling victim to online scams like malvertising? We can help you train your staff, improve your defences, and keep your business safe. Get in touch today.
Ben helps growing businesses turn technology into a driver of performance instead of a barrier. At Nxt Gen IT he works with SME leaders, recruiters, and fast-scaling teams to design solutions that improve reliability, strengthen security, and unlock growth.
With a background in email deliverability and cloud systems, Ben specialises in making sure businesses communicate effectively, keep data safe, and get the most from Microsoft 365. His experience spans solution design, managed IT services, and virtual CIO support, always with a focus on practical outcomes that reduce headaches for business owners.
Ben has supported organisations across the UK, from recruitment agencies struggling with inbox placement to SaaS firms scaling fast, and SMEs needing a trusted partner for their IT. He believes tech is never the end goal: growth is. His role is to make sure technology never gets in the way of it.