file-infection virus; file infector
A type of computer virus that attaches itself to executable files and spreads when they are run.
File-infection viruses spread by attaching themselves to executable files.
A worm is a self-replicating malware that spreads over networks without needing to infect a host file.
Compound of ファイル (file), 感染 (infection), 型 (type), and ウイルス (virus). A straightforward technical term.