Welcome back. Have you ever had to explain to your C-suite colleagues that the corporate network is down because of, well, Vengeful Kitten? Laundry Bear? DeputyDog? 

Cartoonish naming conventions for potentially catastrophic cyberattacks are dividing security professionals, WSJ's Angus Loten reports. Read the full story.

Also today: 

• Iran-linked hackers and supporters could strike U.S. infrastructure, Homeland Security officials warned Sunday
• AT&T's $177 million data-breach settlement gets preliminary approval
• McLaren Health Care gives 743,000 people bad breach news
• Europe worries about the cyber resilience of its ports

• After the U.S. struck Iran’s most fortified nuclear sites Saturday, the regime’s clerical leaders are facing a perilous choice: Hit back at the U.S. and risk a widening a war, or return to nuclear talks where they would likely have to give up on nuclear enrichment and their ballistic-missile arsenal. (WSJ) 

AT&T's $177 million breach settlement: A federal judge in Dallas on Friday gave preliminary approval of a $177 million deal to resolve litigation over two 2024 cyberattacks that exposed the data of tens of millions of customers. 

• One strike hit tech provider Snowflake, which AT&T uses for cloud storage. In a separate incident, hackers published customer information on the dark web. 
• AT&T said if the settlement gets final approval later this year, payments could go out in 2026. (Reuters)

One of the largest U.S. healthcare networks is notifying more than 743,000 patients and others that their medical, insurance and personal data was breached in cyberattack nearly one year ago. Michigan-based McLaren Health Care, in a notice to state regulators, said unauthorized access to its networks occurred over 17 days last summer, starting July 17, 2024. 

• McLaren is offering one year of free credit monitoring to those affected.

Europe sees its own ports as vulnerable in a standoff with Russia. At the North Atlantic Treaty Organization annual summit starting Tuesday, members aim to agree to increase military outlays to 5% of gross domestic product from their current target of 2%. A large chunk of the new target, 1.5% of NATO members’ GDP, will be allocated to nonlethal domains vital to securing NATO territory, from cybersecurity and government resilience to roads, railroads and ports. (WSJ)

The WSJ Pro Cybersecurity team is Deputy Bureau Chief Kim S. Nash and reporters Angus Loten, James Rundle and Catherine Stupp. Follow us on X @WSJCyber. Reach the team by replying to any newsletter you receive or by emailing Kim at kim.nash@wsj.com.