Backdoor:W32/BlackEnergy is a crimeware toolkit that has been modified for use in information gathering in advanced persistent threat (APT) attacks.
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.
BlackEnergy is a toolkit that has been used for years by various criminal outfits. In the summer of 2014, certain samples of BlackEnergy malware were observed targeting Ukrainian government organizations for information harvesting. These samples were identified as being the work of one group (identified as "Quedagh") which has a history of targeting political organizations.
For more details of Backdoor:W32/BlackEnergy's use in APT attacks, see Whitepapers: BlackEnergy & Quedagh: The convergence of crimeware and APT attacks