Insider threats: why most organisations are still getting the risk wrong

When people talk about insider threats, you may picture a disgruntled employee or corporate espionage deliberately trying to cause harm. In reality, that’s the minority of cases.

Most insider incidents start much more quietly, with well-intentioned people taking shortcuts to get their work done. For example, using tools they think are harmless, or moving data in ways that feel convenient at the time. The risk doesn’t come from bad actors inside the business so much as normal behaviour colliding with modern technology.

That’s why insider risk remains one of the hardest security problems to manage. It sits in the gap between productivity and protection, and it can’t be solved by perimeter

The usual insider risk culprit

Every organisation gives people trusted access to systems and data. That access is essential for the business to function, but it also creates risk by default.

Common examples of insider risk show up again and again:

• Sensitive information is pasted into consumer AI tools to speed up drafting
• Files emailed to personal accounts so work can continue elsewhere
• Documents shared more widely than intended

None of this looks like a risk in the moment. But each action increases exposure, and collectively they account for a large proportion of real-world insider incidents.

There’s also the compromised insider scenario, where an employee does everything right – and their credentials are still abused by someone else. For example, a convincing phishing email or fake login page captures their details, allowing an attacker to sign in using a legitimate account and move around systems without raising immediate alarms. From a monitoring point of view, this is particularly difficult because the activity initially looks legitimate.

Why is insider risk becoming more difficult to control?

Two forces are at play making insider risk harder to control. First, deception has become much more accessible for threat actors and more convincing. AI-generated emails and voice messages make malicious requests harder to distinguish from legitimate ones, and mean the usual warning signs are easier to miss.

Second, data now moves faster and further than most organisations can easily track. Non-sanctioned AI tools and personal cloud accounts create new leakage paths that sit outside traditional visibility.

When it comes to managing Insider threats, organisations make the mistake of aiming for “zero leakage”. That usually leads to heavy-handed controls that frustrate staff by stifling productivity, which is exactly what organisations want to try and avoid – and you can’t patch human error.

For companies that are looking to tighten their defences, here are seven practical steps that actually make a difference when protecting against insider threats:

1. Start with ownership and decision-making.

Insider incidents move fast, and uncertainty slows response. Security, HR, Legal and Compliance need to know in advance who has the authority to make decisions when something escalates. Clear ownership avoids delays and the risk of an issue drifting while teams work out who’s responsible.

2. Protect your crown jewels.

Not all data carries the same risk if it leaks. Identifying your most sensitive datasets, i.e. your crown jewels, and where they actually live across cloud platforms, endpoints and third-party tools, makes it far easier to apply proportionate controls. Without this clarity, organisations often over-protect low-risk data while leaving genuinely sensitive information exposed.

3. Keep data classification usable.

Overly complex data classification schemes rarely survive day-to-day use because people find ways to work around them. Simple, consistent labels that employees genuinely understand allow controls such as DLP or access restrictions to operate effectively. When classification adds friction to everyday work, it is most likely to be ignored at the exact moment it is needed.

4. Focus on the main leakage routes.

Most insider incidents follow a small number of predictable routes. Personal email, unsanctioned cloud storage, removable media and risky web uploads account for a large share of exposure. Applying proportionate controls to these paths reduces risk quickly, as long as productivity and legitimate workflows are taken into account.

5. Treat identity as a core control.

Insider risk is fundamentally trusted access being misused, intentionally or otherwise. Strong authentication and alerting on unusual identity behaviour often matter more than adding another security tool. If identity is weak, every other control becomes easier to bypass. That ongoing monitoring and response is an area where a managed service provider, like Ekco, can help, particularly when internal teams don’t have the capacity to watch it continuously.

6. Decide what an “incident” really is.

Not every policy breach is an insider threat, but some require fast escalation. Defining thresholds in advance and what triggers an investigation or disciplinary processes avoids hesitation when response speed matters. Clarity here is critical under pressure.

7. Monitor in a way people can live with.

Monitoring is necessary, but it must be lawful and proportionate. In the UK, that means aligning with GDPR, the Data Protection Act and ICO guidance, and being clear with employees about what is monitored and why. Heavy-handed approaches undermine trust and can create legal risk of their own.

Insider threats aren’t rare, and they aren’t going away. They come with the way people work today and the access they need to do their jobs. What matters is whether organisations can see problems early and act before small issues turn into serious incidents.

If you want a clearer picture of how access is being used across your organisation, Ekco works with teams to map internal access and risk exposure. We also help put practical monitoring and response measures in place without disrupting day-to-day work. Get in touch to talk through what that looks like in your environment.