The Russia-linked hacking group REvil reportedly launched a cyberattack against a U.S. government contractor, Sol Oriens, which works for the Department of Energy on nuclear weapons issues.

“Cyberattack confirmed against a small government contractor that works for the DOE on nuclear weapons issues. The company is called Sol Oriens, and experts tell CNBC they have been hit by REvil, the Russian-linked hacker gang,” Eamon Javers of CNBC reported Thursday.

The REvil ransomware gang claims to have stolen business data and employees’ data, including salary information and social security numbers of Sol Oriens.

As proof that they stole data during the attack, REvil published images of a hiring overview document, payroll documents, and a wages report.

As a way to pressure Sol Oriens into paying the threat actor’s extortion demands, the ransomware gang threatened to share “relevant documentation and data to military angencies (sic) of our choise (sic).”

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