Created Dynamic controls that called client side java script for data validation and calculations. (jobhero.com)
The code you see in this area creates the libraries of java script code for a website. (tdberyoza.ru)
It was first brought into the limelight by a group of infosec researchers, at Sucuri according to them it's a cryptocurrency malicious script and a keylogger from Coinhive (a web - based service that provides website owners to embed java scripts on their website to use the resources of its site visitors to mine cryptocurrency) that runs in the background of admin pages on their interface which not only utilises the hardware resources of the users but also logs every keystrokes of the visitors. (droidholic.com)