Ransomware attack on China’s biggest bank disrupts Treasury market trades


U.S. Treasury says it’s in contact with financial regulators after China’s biggest bank says it experienced a ransomware attack that reportedly disrupted trading in the U.S. Treasury market

A Treasury spokesperson said Friday that the department is monitoring the situation.

Industrial and Commercial Bank of China Financial Services handles trades and other services for financial institutions. A statement on its website seen Friday said the ransomware attack this week disrupted some of its systems but that it had disconnected parts of the affected systems to limit the impact from the attack.

The company, which is based in New York, said it was investigating and had reported the problem to law enforcement.

All Treasury trades executed Wednesday and repo financing trades on Thursday were cleared, it said. It said ICBC’s banking, email and other systems were not affected.

A representative from the Securities Industry and Financial Markets Association said it had no comment on the attack.

ICBC gave no further details but reports said the attack was by LockBit, a Russian-speaking ransomware syndicate that does not target former Soviet countries.

It is one of the most efficient ransomware variants around, according to the cybersecurity firm Emsisoft. Active since September 2019, it has attacked thousands of organizations.


Treasury reporter Fatima Hussein contributed to this report from Washington, D.C.

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