KEY POINTS
  • Sol Oriens, which consults with the federal government on security-related projects including work with the National Nuclear Safety Administration, is REvil's latest ransomware victim.
  • Sol Oriens said it became aware of the "cybersecurity incident" in May.
  • CNBC has learned that documents posted on the dark web include invoices for NNSA contracts and descriptions of research and development projects managed by defense and energy contractors

The hacker group REvil has become a headache for a new victim: a 50-person firm based in Albuquerque, New Mexico, that consults with the federal government on security-related projects.

Sol Oriens, which consults for the U.S. Department of Energy's National Nuclear Safety Administration, confirmed to CNBC that it became aware of the "cybersecurity incident" in May, its investigation is ongoing and law enforcement has been notified.