A ransomware attack is the cause of a disruption at Marks & Spencer Group Plc., with hackers using a potent kind of malware to lock down some of the British retailer’s systems and render them inaccessible, according to people familiar with the attack.
The company has for more than a week attempted to recover from what it’s called a “cyber incident,” pausing online orders and stopping processing some payments in its stores across the U.K. A group of suspected cybercriminals hit the company with a kind of ransomware known as DragonForce, according to two people