The US cyber surveillance agency CISA said on Monday there was “no indication” that the breach recently reported to the US Treasury Department affected any other federal agency.
Late last month, the U.S. Treasury reported that an unspecified number of computers had been compromised by Chinese hackers following a breach at contractor BeyondTrust, which provides cybersecurity services.
BeyondTrust said last month that a limited number of customers were affected, but did not provide further details.
“While the forensic investigation is ongoing, BeyondTrust is unable to confirm other customers who may or may not have been impacted,” the company said in an email Monday.
The Washington Post reported that the hackers breached the U.S. Treasury office that administers economic sanctions, aiming to steal information on Chinese entities that the U.S. government may consider designating as subject to financial sanctions.
Republican lawmakers have demanded a briefing on the breach, which is the latest in a series of intrusions blamed on Beijing.
Liu Pengyu, a spokesperson for the Chinese Embassy in Washington, previously called the Treasury hacking reports “irrational” and a “slander” against China.