Researchers from ESET yesterday exposed a previously undisclosed threat group that descended from TeleBots, the APT group known for launching the BlackEnergy trojan and NotPetya attacks against Ukraine in recent years.
Dubbed GreyEnergy, the actor is comparable to the BlackEnergy group (which later changed strategies and became known as TeleBots or Sandworm) in that it heavily targets the energy sector and critical infrastructure in Ukraine. But it operates more stealthily, focusing on espionage and reconnaissance operations while using a more modern toolset than its predecessor. It also has a more expansive reach, notably targeting Poland, as well as showing interest in non-energy business sectors, including transportation.
In a company blog post and a corresponding research report, ESET notes that GreyEnergy malware also has a modular design and command-and-control architecture that is highly similar to the BlackEnergy malware that was prominently used in a December 2015 attack against the Ukrainian energy grid, causing widespread blackouts. In fact, ESET says this was around the time of this historic attack that its researchers first detected the GreyEnergy malware framework as an offshoot of BlackEnergy.
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