Summary
The most interesting fact regarding this virus is that the author of it is known. He uploaded the virus to a number of BBS, saying that the source code was available for around $20. The virus is a simple .COM infector that adds 857 bytes to any file it infects. It will only infect files on drive A: and B: but it would be easy to "fix" that. An infected program will display the message "Infected!" when it is executed, but otherwise the virus does nothing at all. The virus was uploaded for educational purposes, according to the author, but has now been removed.
Removal
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 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.
Technical Details
Variant:Virus-101
A "new and improved" version. It infects .EXE files as well as .COM files, and is somewhat variable. Some attempts were made to make it difficult to disassemble or modify the virus, but this "protection" is easily defeated. The virus contains one unusual feature, it infects COMMAND.COM by overwriting it, in the same manner as the Lehigh virus does, so no change in length is visible. Unlike Virus-90, this virus was not made available to the public.
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