WASHINGTON — Initial reports that the computers used in the October cyber attack on Nasdaq OMX Group were based in Russia weren't correct, although the investigation has yet to determine the origin of the attack, people familiar with the investigation said.
The National Security Agency, the top U.S. electronic intelligence service, has joined the investigation amid evidence that the hackers' intrusion was more severe than first disclosed, the people said.
The probe of the attack on the second-biggest U.S. stock exchange operator, disclosed last month, is also being assisted by foreign intelligence agencies. Investigators have yet to determine which Nasdaq systems were breached and why, and it could take months for them to finish their work.
(Bloomberg)
