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That finding, first reported by NBC News, comes via Keynote, which maintains dummy accounts with the country's top 15 banks, which it uses to monitor site uptime and availability to customers by attempting to log into its accounts every five minutes.
Keynote didn't immediately respond to an emailed request for a copy of its research. But spokesman Aaron Rudger told NBC that for the six-week period ending on March 31, 2013, the 15 banks' sites were effectively unreachable by customers for a total of 249 hours, or 2% of the time. Compared with the same period last year, the banks only saw 140 hours of downtime, which Rudger said could largely be ascribed to their performing regularly scheduled maintenance, which often occurs at night.
[ Did a monster hack slow down the entire Internet? Read DDoS Attack Doesn't Spell Internet Doom: 7 Facts. ]
The finding that U.S. banks are experiencing double their normal levels of downtime suggests that the distributed denial-of-service (DDoS) attacks being waged under the "Operation Ababil" banner -- the self-described Muslim hacktivist band calling itself the al-Qassam Cyber Fighters -- are having a demonstrable impact on banks' ability to ensure that customers can connect with their websites.
The al-Qassam Cyber Fighters Tuesday announced via Pastebin the fifth week in what it's called the third wave of its banking attacks, and reported that last week, the websites of American Express, Ameriprise Financial, Bank of America, BB&T, Citizens Financial and KeyCorp had been targeted, and customer complaints left on the Site Down website suggested that at least some of those sites were seeing higher than normal levels of disruption.
The Operation Ababil attacks were first launched in September 2012, accompanied by demands that all copies of a film that mocks the founder of Islam be removed from the Internet. The attacks continued with a second round that began in late 2012.
Multiple U.S. government officials have dismissed the film-removal demands as a red herring, and accused the Iranian government of sponsoring the attacks. But a senior member of the House Intelligence Committee, Rep. Adam Schiff (D-Calif.), told NBC News Wednesday that the FBI and "other law enforcement agencies are following up aggressively to identify the responsible parties" behind the DDoS attack campaign, suggesting that the Iranian connection might still be tentative.
Regardless, with each new round, the attackers appear to be refining their attack tools and techniques, as evidenced by the fact that they've been able to compromise otherwise legitimate third-party websites, often by using vulnerabilities related to WordPress or involving PHP, and turn them into staging grounds for launching DDoS attacks that have achieved sustained floods of 70 Gbps and 30 million packets per second. Furthermore, security experts have said that the bank attackers don't even appear to be using all of the firepower at their disposal.
Accordingly, are stronger defenses required? Responding to the Keynote downtime findings, the chair of the House Intelligence Committee, Rep. Mike Rogers (R-Mich.), told NBC News Wednesday that the bank DDoS attacks -- which he blames on the Iranian government -- highlight the need for U.S. government intelligence agencies to share threat intelligence with the private industry. "These banks are among the best in the country when it comes to cyber security, but even they are having trouble keeping up with attacks that have the sophistication and the level of resources that a nation-state entity like Iran can devote to them," he said.
Accordingly, Rogers called on Congress to pass the controversial Cyber Intelligence Sharing and Protection Act (CISPA) that he's co-authored with C.A. Dutch Ruppersberger (D-Md.), which he claimed would enable the government "to share cyber threat information with these banks to help them get ahead of these attacks."
But Rogers offered no evidence to support his assertion that access to better attack signatures would somehow immunize banks' networks against DDoS attacks. A spokesman for Rogers wasn't immediately available by phone to discuss the Congressman's comments.
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