Short answer

Phishing is a type of social engineering attack in which criminals send messages that appear to come from a trusted source to trick people into revealing credentials, opening malicious files or making payments. It is one of the most common ways attackers get into a company.

Common forms of phishing

Spear phishing targets a specific person using details about their role or company. Whaling targets executives. Smishing and vishing use SMS and phone calls. Business email compromise (BEC) impersonates a supplier or executive to redirect a payment.

Warning signs

Typical signs include urgency or pressure, an unexpected request for payment or credentials, a sender address that does not match the organisation, links that point to a different domain and attachments nobody was expecting.

How companies reduce the risk

Protection combines technology and people: email filtering, multifactor authentication so stolen passwords are not enough, awareness training and phishing simulations that show who clicks and, just as important, who reports. A clear and easy way to report suspicious messages is one of the most effective measures.

Where it shows up in compliance

Awareness training is required by ISO 27001 (Annex A 6.3), the ENS and NIS2, and phishing simulations are a common way to show it is effective. Our article on security awareness under ISO 27001 covers what auditors expect.

Related terms

Keep reading on this topic

Turning employees into an active line of defence: awareness training, phishing simulation, device and identity hygiene, and SaaS access control.

Go to the topic hub