This is a polymorphic virus which infects EXE files. Occasionally it overwrites programs with a trojan which displays this text when run:
Hi! My name is Neko. It is a Japan name. When you see me , please do not worry. New i am a very kind and cute virus. I only kill your this file. But next time i will kill you all. I will be com back and become fierce. Neko version 1.0
Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.
This bigger version displays this text:
Dear Mrs.Grandy: Aloha! It is me,Neko again! This is the lastest version 2.0 Undoubtedly,I am not what I was. Let me tell you something about my improvement. I work with the Antilogic Engine I. It is a new invention.So, Showtime! Neko version 2.0 Made by Metal Satan
Neko was reported to be in the wild in Isreal in March 1996.
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