Public schools in two Michigan counties are reopening on Thursday after a ransomware attack crippled their ability to function and closed doors to students for three days. All of the public schools in Jackson and Hillsdale counties announced their reopening on Thursday in letters to parents, assuring them that cybersecurity experts, tech officials and law enforcement worked around the clock to restore the systems following outages that began on Monday.

Microsoft tied hackers with the Vice Society ransomware gang to several ransomware strains on Tuesday, noting that the group has been behind a wave of attacks on primary schools and colleges across the world.