insider threats: why your biggest cyber risk may already be inside your business
When you picture a cyber attack, you probably imagine a hacker somewhere far away, trying to break through your defences. But for many UK businesses, one of the biggest cyber security risks is much closer to home. Insider threats come from the people who already have access to your systems. Sometimes the harm is deliberate, but more often it’s an honest mistake.
Employees, contractors, suppliers, even trusted executives can put your business at risk. The good news? Once you know what to look for, these risks are very manageable. Here’s what to watch for and what you can do about it.
six ways “insider risk” shows up
It’s not just one thing. Here are the most common forms it takes:
- Data walking out the door. Someone copies sensitive files, takes a work laptop home and doesn’t bring it back, or emails company information to a personal account. Whether they mean harm or just don’t realise it’s a problem.
- Deliberate damage. An unhappy employee, or someone working with a competitor, intentionally deletes files, plants malware, or locks your team out of important systems.
- Looking at things they shouldn’t. Sometimes this is nosiness, someone peeking at records that aren’t their business. Other times, people simply don’t realise they’ve wandered somewhere they don’t belong.
- Honest mistakes. Not every risk is malicious. A misdirected email, a skipped security step, or a careless slip can do just as much damage as someone acting with bad intent.
- Sharing passwords. Handing a colleague your login is a bit like handing a stranger the keys to your house. You have no way of knowing what they’ll do with them, or who else might get hold of them.
- Using AI tools you haven’t approved. It’s become second nature for people to paste information into ChatGPT or similar tools to save time. The trouble is, if that information is sensitive, it may now be sitting somewhere outside your control.
warning signs worth paying attention to
Train your team to notice these patterns. Not because any one of them proves wrongdoing, but because together they’re worth a closer look:
- Someone suddenly accessing information that has nothing to do with their job
- Large amounts of data being downloaded or moved to a USB stick or personal device
- Repeated requests for access to information they don’t need
- Work being done on personal laptops or unapproved devices
- Antivirus software, firewalls, or other protections being switched off
- Sensitive information being shared with AI tools your business hasn’t reviewed
- Noticeable changes in behaviour; missed deadlines, secrecy, or signs of stress
five steps to protect your business from the inside out
- Use strong, unique passwords and turn on multi-factor authentication (a second login check, like a code sent to your phone) everywhere you can.
- Make sure people can only access the information they really need for their role, and review those permissions regularly.
- Train your team, so everyone understands the risks and knows how to use AI tools safely.
- Back up your data regularly, so a mistake or an incident doesn’t mean losing everything.
- Put a plan in writing for how your business will respond if something does go wrong, including clear rules for AI use and handling sensitive information.
you don’t have to figure this out alone
Protecting your business from risks that come from inside can feel like a lot to manage on your own. And it is, if you’re doing it without support.
That’s where we come in. Siarp, as your IT partner, we help businesses put the right safeguards, monitoring, and response plans in place, so you’re protected from the inside out, whether you’re starting fresh or building on what you already have.
Ready to talk it through? Book a 10-minute call and we’ll show you how to spot potential risks early and respond with confidence if something happens.
