Malware
Valak
aka Valek
According to PCrisk, Valak is malicious software that downloads JScript files and executes them.
Valak, also known as Valek, is a JavaScript malware family.
Background
PCrisk states that Valak is malware that retrieves JScript files and runs them, with the subsequent outcome determined by whatever those executed JScript files do. The operators behind Valak most likely intend to trigger chain infections, using it as a vehicle to spread additional malware.
According to research, Valak arrives mainly through spam campaigns, though in some instances it lands on systems already compromised by malware such as Ursnif (also known as Gozi).
Source: Malpedia (Fraunhofer FKIE).