The Federal Bureau of Investigation is investigating a cyber attack on several American financial institutions, including J.P. Morgan Chase & Co, reports the Wall Street Journal.
Using malicious code, hackers appear to have originally breached J.P. Morgan's network via an employee's personal computer. From there, the intruders made a significant foray into the company's computer system , according to the Journal, citing people familiar with the probe.
The method of the attacks and the targets—large U.S. financial institutions—have led some people to suspect a possible Russian. FBI is investigating whether the assault was in retaliation for U.S.-government sponsored sanctions against the country.
In recent weeks, J.P. Morgan called numerous security vendors with concerns it had a problem. The bank also hired a number of employees with Defense Department experience because the firm takes cybersecurity seriously.
"Companies of our size unfortunately experience cyberattacks nearly every day," said Trish Wexler, a J.P. Morgan spokeswoman. "We have multiple layers of defense to counteract any threats and constantly monitor fraud levels."
While the attack resulted in the loss of sensitive data, the company isn't seeing considerable fraud related to the attack.