In a high$-$end securities organization, the IT manager is receiving multiple requests for issues with systems. Upon investigating further, he finds an issue with the concerned systems; that is$,$ the users downloaded a file from a website, and after they executed the file, the system is arbitrarily responding to keyboard commands. What type of malware has possibly transpired?

A

MITM attack

B $$ DoS attack

C $$ Worm

D $$ Logic bomb