This is a simple, but encrypted direct action virus. It infects only COM files by changing the first 4 bytes of the program to a JMP WORD+an identifier. The virus code is 419 size long which is appended to the of the program. The virus activates on 30th of April each year when it displays the following text and hangs the machine:
NightBird goes, Along with the Queen...
It also contains the text:
*April 30 Virus*
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.
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Check the user guide for instructions.
Submit a Sample
Submit a file or URL for analysis.