Many small businesses in Benalmádena, Marbella and the rest of the Costa del Sol think cyberattacks are something that happens to big companies. The reality is the opposite: SMEs are the favourite target because they usually have less protection and a single slip is enough to paralyse the office for days. At Master Informática we have been supporting local businesses for more than 20 years, and these are the risks we see most and how to prevent them without making your life complicated.
The most common threats for an SME
1. Phishing: emails and messages pretending to be someone else
It is the number one way in. An email that looks like it comes from your bank, the post office, the Tax Agency or even a regular supplier asks you to click a link, download an invoice or "verify" your password. Today these messages are very well written, so spelling is no longer a way to spot them. Be suspicious of any urgency, check the sender's real address and never enter passwords from a link you have received.
2. Ransomware: the virus that holds your files hostage
It encrypts the documents on the computer and in shared folders and demands a ransom to return them. Paying does not guarantee getting anything back. The only truly effective defence is having backups that are up to date, tested and stored out of reach of the infected computer.
3. CEO fraud and bank account change scams
Someone impersonates the manager or a supplier and asks for an urgent transfer or announces a "new account number". Set a simple rule: any change of bank details or unusual payment is always confirmed by phone, calling a number you already have, never the one in the message.
4. Weak or reused passwords
Using the same password for email, your accountant's portal and the online shop means that if one leaks, they all fall. The recommendation is a password manager and a different, long password for each service.
5. Out-of-date computers and software
An un-updated Windows, router or WordPress website has known flaws that attackers exploit automatically. Updates are not a nuisance: they are security patches.
Checklist: 10 basic cybersecurity measures
- Two-factor authentication (2FA) on email, banking and cloud tools. It is the measure that stops the most attacks.
- Automatic backups following the 3-2-1 rule: three copies, on two different media and one outside the office.
- Up-to-date updates on computers, mobiles, router, printers and website.
- Professional antivirus managed on every computer, not just the boss's.
- Password manager and a unique password for each service.
- Users without administrator rights for day-to-day work.
- Separate guest Wi-Fi from the company network.
- Business email with spam filters and impersonation protection (SPF, DKIM and DMARC configured on your domain).
- Short training for the team: five minutes spent teaching people to recognise a fraudulent email prevents most problems.
- A plan for what to do if something happens: whom to call, how to disconnect the affected computer and where the backups are.
What to do if you suspect you have been attacked?
- Disconnect the computer from the network (cable and Wi-Fi), but do not switch it off if you can avoid it.
- From another device, change the passwords for email and the affected services.
- Inform your bank if payments or bank details are involved.
- Do not pay ransoms or reply to the attackers.
- Contact your IT support to assess the scope and restore from backups.
- If clients' personal data has been compromised, consider the obligation to notify the Spanish Data Protection Agency. For any questions or incidents you can also contact INCIBE on the free helpline 017.
Security is also maintenance
Most of these measures do not require big investments, just consistency: checking that backups work, applying updates and monitoring computers before problems arise. That is exactly what a good IT maintenance for businessescovers. And if your website is what worries you, we also protect it against spam, bots and attacks as part of our web design and maintenance.
If you have a business in Benalmádena, Marbella, Málaga or the Costa del Sol and want to know how well protected it is, contact Master Informática and we will review your case with no obligation.
IT maintenance