GreyEnergy is the quieter and likely more dangerous of two subgroups that BlackEnergy evolved into after the Ukraine power grid attack. The group has been using an updated BlackEnergy malware toolkit to target organizations in the energy and transportation sectors, ESET says. GreyEnergy has been distributing its malware in two ways via spearphishing and by compromising public-facing Web servers. The most recent attack that ESET has been able to attribute to GreyEnergy happened this past June, it says.”]