NetSky.W worm variant was discovered on April 16th, 2004.Although it has been just discovered, this variant is much more similar to NetSky.P or NetSky.Q than to any of the later variants. In fact, its structure bears a striking resemblance to that of NetSky.P, so only some differences among them will be listed on this description.This variant does not spread through P2P networks, as NetSky.P does.
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.
Upon execution Netsky.W copies itself as VisualGuard.exe file to the Windows folder. The worm adds a startup key for itself into System Registry:
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] "NetDy" = "%WinDir%\VisualGuard.exe"
where %WinDir% represents Windows folder name.
Additionally the worm drops the following files into Windows folder:
zipped.tmp base64.tmp zip1.tmp zip2.tmp zip3.tmp
Most of the email spreading functionality is similar or identical to NetSky.P.
NetSky.W worm removes Registry keys of several Bagle worm variants if it finds them on an infected computer.