Iran Renews Internet Attacks on U.S. Banks

Iranian hackers renewed a campaign of cyberattacks against U.S. banks this week, targeting Capital One Financial and BB&T Corp. and openly defying U.S. warnings to halt, U.S. officials and others involved in the investigation into the attacks said.

The attacks, which disrupted the banks' websites, showed the ability of the Iranian group to sustain its cyberassault on the nation's largest banks for a fifth week, even as it announced its plans to attack in advance. U.S. officials said the attacks against banks, and others against Middle Eastern energy companies, were sponsored by the Iranian government and approved at high levels as part of a low-grade cyberwar that officials warned could lead to retaliation.