Mid-infector

Virus which inserts its code in the middle of files

A mid-infector is a type of file-infector virus which places its code in the middle of the files it infects. It may move a section of the original code to the end of the file, or simply push the code aside to make space for its own code.

A more sophisticated type of mid-infector is the cavity filler. Compare also prepender, appender.

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