Chinese language hackers remotely accessed a number of U.S. Treasury Division workstations and unclassified paperwork after compromising a third-party software program service supplier, the company stated Monday.

The division didn’t present particulars on what number of workstations had been accessed or what kind of paperwork the hackers might have obtained, but it surely stated in a letter to lawmakers revealing the breach that “right now there isn’t a proof indicating the menace actor has continued entry to Treasury info.”

“Treasury takes very critically all threats in opposition to our programs, and the info it holds,” the division stated. “During the last 4 years, Treasury has considerably bolstered its cyber protection, and we are going to proceed to work with each personal and public sector companions to guard our monetary system from menace actors.”

The division stated it discovered of the issue on Dec. 8 when a third-party software program service supplier, BeyondTrust, flagged that hackers had stolen a key utilized by the seller that helped it override the system and achieve distant entry to a number of worker workstations.

The compromised service has since been taken offline, and there is no proof that the hackers nonetheless have entry to division info, Aditi Hardikar, an assistant Treasury secretary, stated within the letter Monday to leaders of the Senate Banking Committee.

The division stated it was working with the FBI and the Cybersecurity and Infrastructure Safety Company, and that the hack had been attributed to Chinese language culprits. It didn’t elaborate.