There is a ransom malware targeting students at JS Morton High School in Illinois. Below is a signature for anyone there that uses ClamWin. Just copy the signature and paste it to a Notepad file, save the file as Sigfile.mdb in the C:\ProgramData\.clamwin\db folder. The ransomware is in development and doesn't really encrypt your files yet.

278528:169449441ed2358c49f6ab7ac2fd4968:Win.Trojan.JSMortonHS-111517.2041

Regards,