ShinyHunters told 404 Media it hacked the FBI and holds data on all employees and applicants.
The claim, reported by 404 Media, includes a sample of 5,000 alleged agents with names, home addresses, phone numbers and spouse details reviewed by journalist Joseph Cox.
The group described the compromise as affecting multiple FBI-related services, implying remote access rather than local device compromise, though no exploit details or patch status were disclosed.
The FBI said it was probing a suspected hack after the claim surfaced, according to Politico.
Verification requires confirming chain of custody for the sample, cross-checking personnel records, and identifying which recruitment or background-check system was exposed.
