An Emsisoft report found that more than 1,000 schools alone were disrupted by ransomware incidents.
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Russian law enforcement officials said they initially detained 14 people during a series of raids across the country this week.
White House confirms person behind Colonial Pipeline ransomware attack nabbed during Russian REvil raid
Russian officials arrested 14 alleged members of the REvil ransomware group on Friday.
The FBI claimed the cyberattack on the public school system is not connected to the ransomware attack affecting Bernalillo County.
The ransomware group was behind attacks on more than 50 companies across Europe and the US.
Health officials said they have to figure out COVID-19 statistics by hand because of the attack.
The education technology company would not say which ransomware was involved in the attack that started on January 4.
The company recommended that customers limit software usage to critical information updates on Friday morning as schools sought to message parents about COVID and snow-related closures.
The Arkansas government attack began on December 27, and New Mexico announced a ransomware incident on January 5.
The company said compromised employee records had Social Security numbers, bank account information, and health insurance data.