An email which contains an attachment with a filename of dontopen.exe has been received by Sophos. When the user runs the executable file, it will display a message and it will shut off the computer of the user in 60 seconds according to Sophos.

The display says, “This system is shutting down. Please save all work in progress and  log off. Any unsaved changes will be lost.” It also has another sentence but the article covered the last word.

The file was identified as Troj/Shutdown-I. A screenshot of the message was included in the article. The author notes that they the clock back so it does not say 60 seconds in the screenshot.

Source: Sophos