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.
A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:
Check for the latest database updates
First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note You need administrative rights to change the settings.
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.