The Bank of New York Mellon Corp. building at 1 Wall St. is seen in New York's financial district March 11, 2015.
BNY Mellon, the sole settlement agent for Treasury securities, disconnected the Chinese bank from the platform after the hack and is waiting for a third party to attest that it is safe to reconnect, the sources said.
The attack, confirmed by ICBC on Thursday, is the latest in a string of demands for ransom that hackers have claimed this year.
ICBC Financial Services, the bank's U.S. unit, said it was investigating the attack that disrupted some of its systems, and making progress toward recovering from it.
Reporting by Lananh Nguyen and Paritosh Bansal; Editing by Megan DaviesOur Standards: The Thomson Reuters Trust Principles.
Persons:
Brendan McDermid, BNY Mellon, ICBC, Lananh Nguyen, Paritosh, Megan Davies
Organizations:
of New York Mellon Corp, REUTERS, Commercial Bank of, Treasury, ICBC Financial Services, Thomson
Locations:
U.S