According to the FBI, a ransomware gang breached the networks of more than 50 U.S. infrastructure organizations. This include energy, nuclear, water, and manufacturing facilities.
"As of January 2022, the FBI has identified at least 52 entities across 10 critical infrastructure sectors affected by RagnarLocker ransomware, including entities in the critical manufacturing, energy, financial services, government, and information technology sectors," said the FBI’s Cybersecurity and Infrastructure Security Agency (CISA).
This malicious software stops remote management software to enable bad actors to evade detection and lock users out of systems. They then issue a ransom demand. The FBI discouraging the paying of ransoms as there is no guarantee that this will prevent data theft or future attacks.