Backdoor:W32/BlackEnergy is a crimeware toolkit that has been modified for use in information gathering in advanced persistent threat (APT) atttacks.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
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 Ukranian 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