if detection is correct, then you have a serious Virus / file infector
file infectors are real virus, like a computer cancer and inject malicious code in legit files

this may end with a format/reinstall :-\

Virut and other File infectors - Throwing in the Towel? http://miekiemoes.blogspot.no/2009/02/virut-and-other-file-infectors-throwing.html

File infector virus https://www.virusbtn.com/resources/glossary/file_infector_virus.xml

removal team is notified, wait for advice…