Appender

Virus that inserts its code at the end of files

Appenders are file-infecting viruses which place their code at the end of the files they infect, adjusting the file's entry point to cause their code to be executed before that of the original file.

Compare prepender, mid-infector, cavity filler.

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Malware Prevalence
Autorun |#######|
Encrypted/Obfuscated |#####|
Heuristic/generic |#####|
Sality |####|
Zbot |####|
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