Bratislava — Hackers have infected three energy and transport companies in Ukraine and Poland with sophisticated new malware and may be planning destructive cyber attacks, a software security firm said on Wednesday. A report by researchers at Slovakia-based ESET did not attribute the hacking activity, recorded between 2015 and mid-2018, to any specific country but blamed it on a group that has been accused by Britain of having links to Russian military intelligence. The report is the latest to raise suspicions in the West about Russia’s GRU spy agency, accused by London of conducting a “reckless campaign” of global cyber attacks and trying to kill a former Russian spy in England. Moscow denies the charges. Investigators at ESET said the group responsible for a series of earlier attacks against the Ukrainian energy sector, which used malicious software known as BlackEnergy, had now developed and used a new malware suite called GreyEnergy. ESET has helped investigate a series of high-...

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