Malware
Jigsaw
According to PCrisk, Jigsaw is ransomware that uses the AES algorithm to encrypt various files stored on computers.
Jigsaw is a Windows malware family.
Background
Per PCrisk, Jigsaw is ransomware that encrypts a range of files on a computer using the AES algorithm. Among the file types it goes after are .jpg, .docx, .mp3, .mp4, and many more.
Source: Malpedia (Fraunhofer FKIE).