Chinese hackers have stolen tens of millions of dollars worth of U.S. COVID relief benefits since 2020, the Secret Service said on Monday.

The Secret Service declined to provide any additional details but confirmed a report by NBC News that said the Chinese hacking team that is reportedly responsible is known within the security research community as APT41 or Winnti.

APT41 is a prolific cybercriminal group that had conducted a mix of government-backed cyber intrusions and financially motivated data breaches, according to experts.

Chinese government-affiliated hackers stole more than $20 million in COVID-19 relief funds dedicated to small businesses and unemployment benefits, the Secret Service revealed.

The theft was discovered as part of a larger investigation in which $286 million was recovered in August, traced back to 15,000 fake accounts created at a Texas bank. Approximately $87 billion in Economic Injury Disaster Loans have gone missing since the federal program was formed in the COVID-19 pandemic's early stages.

Chinese government-linked hackers have stolen at least $20 million in US government coronavirus relief funds, a US Secret Service spokesperson told CNN Monday – the first time the agency has connected Covid-19 fraud to hackers affiliated with a foreign government.

The hackers raided unemployment insurance funds and Small Business Administration loan money in more than a dozen US states, said Secret Service spokesperson Justine Whelan.