Manzon is a fast infector of COM and EXE files, and is about 1414-1490 bytes in size. It was found from Sweden in May 1995, but is known to be in the wild internationally.
Allow F-Secure Anti-Virus to disinfect the relevant files.
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Manzon has two layers of encryption, under which you can find the following text:
MANZON (c) Sgg1F5PZ.
The virus uses variable encryption, but can't be considered really polymorphic. It can be detected with a set of search strings.
Manzon is known to be in the wild in at least Sweden, UK and several countries in the central Europe.
The same author has written the Scitzo virus.
Manzon does not activate in any way.
Description Created: Mikko Hypponen, F-Secure