How to protect your business from ransomware
Ransomware encrypts a company's files and demands a ransom to unlock them. It doesn't only hit large companies: small businesses, with less protection, are a frequent target.
How it usually gets in
- Emails with attachments or links pretending to be a supplier, a bank or a courier.
- Services exposed to the internet: remote desktop, NAS or camera recorders reachable from outside.
- Reused passwords leaked from another website.
- Unpatched devices with known vulnerabilities.
The measures that help most
- Immutable or offline backups: if everything else fails, they let you recover without paying.
- Updates for systems, applications, router, NAS and cameras.
- Nothing exposed to the internet: remote access only through a VPN.
- Two-factor authentication on email, the VPN and critical applications.
- Separate networks: work computers, cameras, home automation and guest WiFi on different segments, so a problem doesn't spread.
- Least privilege: each person only accesses the folders they need.
- Training: recognising a suspicious email prevents many incidents.
If it happens
- Disconnect affected devices from the network, without switching them off if possible.
- Call your trusted technician before touching anything else.
- Check which backups are intact and plan the restore.
- Change the passwords involved.
Frequently asked questions
Is antivirus enough?
It's necessary, but not enough. Real protection combines backups, updates, secure remote access, two-factor authentication and a well-segmented network.
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