Computer hackers targeted JPMorgan Chase & Co. (JPM) and at least four other banks in a coordinated attack on major financial institutions this month, according to a U.S. official.
The attack led to the theft of customer data that could be used to drain accounts, according to another person briefed by U.S. law enforcement. The two people, who asked not to be identified because the investigation is continuing, discussed the incident after Bloomberg News reported a breach on banks earlier today.
Hackers targeted customer and employee information, said a third person involved in the investigation, who was also briefed by the government. The theft involved gigabytes of data, said several people familiar with the attacks. The scale indicates a potential for significant financial fraud.
Most thefts of financial information involve retailers or personal computers of consumers. Stealing data from big banks is rare, because they have elaborate firewalls and security systems.