A user calls the help desk to report issues with a computer. Earlier in the day, the user received an email with a link to a document to download. Nothing happened immediately after the user downloaded the document, but the computer then began to respond slowly. Applications also started to crash. The help desk technician discovers many of the user's files and applications have been renamed with .enc at the end. There is also a .txt file on the desktop with instructions on how to obtain the encryption key.
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