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Hackers leak sensitive data apparently stolen from Bureau of Alcohol, Tobacco, Firearms and Explosives
Qilin began posting files tied to ATF investigations and agents, while the agency said it cannot confirm the data’s authenticity or scope.
On Monday, a likely Russian-speaking cybercriminal gang leaked sensitive law enforcement files stolen from the Justice Department's ATF, including information on targets of past investigations involving arson, explosives, and homicide.
Qilin, a prolific ransomware group, claimed responsibility for the breach, which the ATF originally disclosed last week as a "major" cybersecurity incident requiring Congress notification.
According to researcher Ron Fabela, files correspond to specific agents and high-profile cases, particularly from the ATF Houston Field Division, including analysis of past phone communications.
Investigating the breach, the ATF stated on Monday it "cannot confirm the authenticity, nature, or scope" of the data while working with the Justice Department to assess claims.
Federal agencies have recently struggled with cyber threats, exemplified by the 2023 Marshals Service ransomware attack and the FBI New York field office breach involving Jeffrey Epstein.