Citing sources familiar with the investigation, The Wall Street Journal and Bloomberg are reporting that the FBI has found no evidence that would suggest any other big U.S. bank was breached by hackers in the most recent cyber attack against J.P. Morgan Chase and Co.
The FBI said last week it was "working with the United States Secret Service to determine the scope of recently reported cyber attacks against several American financial institutions," with the focus being on JPMorgan and possibly several other banks, according to the WSJ.
The bank's "own investigators have found clues that a global network of computers available for hire by sophisticated criminals was used to reroute data stolen from the bank [J.P.Morgan] to a major Russian city," according to Bloomberg.
However, people familiar with JPMorgan’s investigation told Bloomberg News that the cybercriminals operating the global network had also aimed at other banks’ systems, but may not have hacked them.
A spokesperson for JPMorgan did not respond to this reporter's request for comment on the investigation, but told Bloomberg that fraud levels at the bank were not elevated.