Macro virus

Unlike other virus types, macro viruses aren't specific to an operating system and spread with ease via email attachments, floppy disks, Web downloads, file transfers, and cooperative applications. Macro viruses are, however, application-specific.

They infect macro utilities that accompany such applications as Microsoft Word and Excel. Macro viruses are written in ' every man's programming language ' such as Visual Basic or Corel Draw, and these types of programming languages are relatively easy to create.