Learn in the textbookMalware Variants and Specialized Types
DefinitionA macro virus (マクロウイルス) is a virus that abuses the macro feature of word processors and spreadsheet programs, hiding in document files and running from there.
ExplanationA macro is a small program written into a document to automate repetitive tasks. A macro virus springs into action when a document containing such a macro is opened and the macro runs, infecting other documents or doing something malicious. Because it arrives as a familiar document rather than an executable program, recipients are less likely to be suspicious of it.
AnalogyIt is like an envelope that looks like ordinary paperwork but hides a device that goes off when you open it.
Memory hookAn ordinary virus lives in a program, a macro virus lives in a document. Remember them by where they live.