The employees were exposed to a form of malware known as ransomware.
The culprits tricked them into installing a program that made all the files
unusable as a result of the attack.
Ransomware however involves them demanding for a ransom for the files
and computer to become usable again. This is usually done by decrypting
the already encrypted files on the system.
This is why it is best to install softwares that prevent malware attacks on
computers and files.
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