Netsnake is packed with ASPack, its size unpacked is a over 170 KiB.Its objective appears to be stealing users' information. It originates from China and, given the contents of the executable, it targets Chinese users.
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.
Netsnake.H copies itself to the System32 Windows folder, in a file named "iexplore.exe" and sets a key in the Windows registry:
[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run] "mssysint" = "iexplore.exe"
in order to be run when the system starts.
It will then execute iexplore.exe.
It has capabilities to download additional components and send email.
It will search for files matching the pattern "pwdbox*.exe" and "upgrade*.exe" in the Windows' System32 folder and will delete them if any is found.