Hive used Ransomware to extort the victims of a ton of money. Ransomware is software that can easily close down your computer and demand a ransom for it to be released and reopened and restored access. Any computer that is connected to the internet could be attacked by Ransomware they usually prefer phishing attacks. Phishing attacks are usually when the attacker clones a website, e-mail, or even a link that looks legitimate like the original and waits for a user to accidentally chose the wrong one. Like caught on the fishing hook, hence the name Phishing attack.
Reports from the agency came in that Hive operates by stealing sensitive data such as e-mails, videos, pictures, and documents from their victims while also encrypting their computer files. By extorting the victims they have to pay up the ransom using Bitcoin for the price of decryption keys needed to restore data. Later they can extort extra funds for the personal data they collected for a promise of not releasing them on the dark web. If failed to pay everything gets published online.