itwbennett writes: A cyberespionage group known in the security community as Sandworm or BlackEnergy, after its primary malware tool, has recently updated its arsenal with a destructive data-wiping component and a backdoored SSH server. On the eve of Dec. 23, a large area in the Ivano-Frankivsk district in Ukraine suffered a power outage. Ukrainian news service TSN reported that the outage was caused by a virus that disconnected electrical substations. Researchers from antivirus vendor ESET believe that this attack was performed with the BlackEnergy malware and that it wasn't the only one. 'As well as being able to delete system files to make the system unbootable — functionality typical for such destructive trojans — the KillDisk variant detected in the electricity distribution companies also appears to contain some additional functionality specifically intended to sabotage industrial systems,' the ESET researchers said in a blog post.