WHY RANSOMWARE IS NOW THE BIGGEST THREAT TO UK BUSINESSES IN

If you think ransomware is someone else's problem, think again. Ransomware is no longer a threat reserved for large corporations or government bodies — it is now the single most common and most damaging form of cybercrime targeting UK businesses of all sizes, and it is getting worse.

In 2024, ransomware incidents in the UK rose by 67%. The average ransom demand against a mid-sized business now exceeds £200,000, and that figure doesn't include the cost of downtime, recovery, reputational damage, or regulatory fines that can follow a breach.

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What Ransomware Actually Does

Most people have a basic understanding of ransomware: criminals get into your systems, lock your files, and demand payment to restore access. That model still exists, but it has evolved significantly.

Today's ransomware attacks almost always involve data theft before encryption. Criminals spend days or even weeks inside your network before you know they are there, quietly copying sensitive data — client records, financial information, contracts, employee details — to their own servers. Only then do they encrypt your systems and make themselves known.

This means that even if you have backups and can restore your systems without paying the ransom, the attackers still have your data. They will threaten to publish it publicly, sell it to competitors, or report you to the Information Commissioner's Office (ICO) themselves unless you pay. This is known as double extortion, and it has become the standard playbook.

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How Do Attackers Get In?

Understanding the entry points is the first step to closing them. The most common routes into a business are:

Phishing emails remain the number one method. A member of staff clicks a link or opens an attachment, and the attacker gains a foothold. These emails are increasingly convincing — more on that in our AI phishing article.

Unpatched software is the second major route. If your systems are not kept up to date, attackers can exploit known vulnerabilities that have already been publicly documented. In many cases, patches were available months before the attack.

Weak or stolen credentials are the third. If an employee reuses a password that has appeared in a previous data breach elsewhere, attackers can simply log in using those credentials. This is why multi-factor authentication is so important.

Remote Desktop Protocol (RDP) left exposed to the internet is another common entry point, particularly for businesses that set up remote access quickly during the pandemic and never properly secured it.

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Who Is Being Targeted?

Every sector is at risk, but criminals tend to target businesses where downtime is most painful and where the pressure to pay quickly is highest. Professional services firms, legal practices, accountants, manufacturers, healthcare providers, and logistics companies are all frequently targeted precisely because they cannot afford to be offline.

Small and medium-sized businesses are particularly attractive targets. Criminals know that SMBs often lack the in-house security expertise of larger organisations but still hold valuable data and have the means to pay.

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What Happens If You Pay?

Law enforcement agencies including the National Cyber Security Centre (NCSC) and the FBI advise against paying ransoms. There are several reasons for this. Paying does not guarantee you will get your data back — roughly a third of businesses that pay never fully recover their files. It also marks you as a target willing to pay, making future attacks more likely. And in some cases, paying a ransom may breach sanctions regulations if the criminal group is on a government sanctions list.

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What You Should Be Doing Now

The good news is that most ransomware attacks are preventable. The following steps significantly reduce your risk:

Enable multi-factor authentication on all accounts, particularly email and any cloud services. This single step blocks the vast majority of credential-based attacks.

Keep all software and operating systems patched and up to date. Automate this where possible and track compliance centrally.

Implement proper backups following the 3-2-1 rule — three copies of your data, on two different types of media, with one stored offsite and offline. Test your backups regularly to confirm they can actually be restored.

Invest in modern endpoint detection and response (EDR) tools rather than relying on traditional antivirus software, which is no longer sufficient against sophisticated threats.

Train your staff. Human error is involved in the majority of successful attacks. Regular, realistic phishing simulations and security awareness training make a measurable difference.

Have an incident response plan in place before you need it. Know who to call, what to isolate, and how to communicate with clients and regulators if the worst happens.

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The Bottom Line

Ransomware is not a technology problem — it is a business risk. The question is not whether your organisation could be targeted, but whether you are prepared if it is. The businesses that recover quickly are those that invested in prevention and planning before an incident occurred.

If you would like a no-obligation assessment of your current security posture, get in touch with our team. We work with commercial organisations across the UK to put the right protections in place before attackers do