Malware
Velso
Ransomware that appears to require manually installation (believed to be via RDP).
Velso is a Windows malware family.
Background
A ransomware family that seems to be deployed by hand rather than automatically, with RDP suspected as the delivery method. Once active, it encrypts a victim's files and appends the .velso extension to them.
Source: Malpedia (Fraunhofer FKIE).