“There are a lot of parallels, there’s a lot of importance, and a lot of focus by us on disruption and prevention,” Mr. Wray said in an interview on Thursday. “There’s a shared responsibility, not just across government agencies but across the private sector and even the average American.” Mr. Wray’s comments—among his first publicly since two recent ransomware attacks gripped the U.S. meat and oil-and-gas industries—come as senior Biden administration officials have characterized ransomware as an urgent national-security threat and said they are looking at ways to disrupt the criminal ecosystem that supports the booming industry. Each of the 100 different malicious software variants are responsible for multiple ransomware attacks in the U.S., Mr. Wray said... While the most prominent of the recent ransomware hacks disrupted gasoline deliveries and took meat-processing plants temporarily offline, they represent only a fraction of the some 100 types of ransomware the FBI is currently investigating, Mr. Wray said. “Those are just two,” he said, adding that each of those 100 different malicious software variants had affected between a dozen and 100 targets.