https://www.bleepingcomputer.com/news/security/subway-marketing-system-hacked-to-send-trickbot-malware-emails/

Subway UK has disclosed that a hacked system used for marketing campaigns is responsible for the malware-laden phishing emails sent to customers yesterday.

Starting yesterday, Subway UK customers received strange emails from 'Subcard' about a Subway order that was placed. Included in the email were links to documents allegedly containing confirmation of the order.