The attacks had been previewed the day before they were launched. In a post to Pastebin, a group calling itself "the 'L0NGwave99' cyber group" said Sunday it was going to launch "Operation Digital Tornado" in support of the "99% movement" Monday at 9 a.m. New York time. A later message promised the same for Tuesday.
"The NASDAQ stock exchange besides a number of U.S. stock markets are going to face some problems and may need maintenance," said the L0NGwave99 statement, which promised to launch DDoS-driven takedowns against www.nasdaq.com, www.batstrading.com (BATS), www.cboe.com (CBOE), and www.ms4x.com (the Miami Stock Exchange).
"Will anybody be able to stop the people?s (sic) storm of seeking justice against the liar and deceptive Capitalism-Liberalism? Soon we will see..." read the group's statement.
[ Worried? Read 10 Strategies To Fight Anonymous DDoS Attacks. ]
The attack purportedly involved members of Anonymous. According to a Tuesday post to "TheAnonMessage" Twitter channel, "#Anonymous, in cooperation with #LONGwave99, have successfully taken down the #NASDAQ website." According to news reports, the BATS and CBOE sites were also only intermittently available, although the Miami Stock Exchange website appears to have remained online.
Nasdaq confirmed Tuesday that some of its public websites, including its nasdaqtrader.com portal for customer communications, had been partially unreachable during the DDoS attacks. "During the past 24 hours, Nasdaq OMX has experienced intermittent service disruptions on our corporate websites," according to a statement released by the company. "We are working with our Internet service providers to resolve these issues."
But Nasdaq emphasized that stock trading had remained unaffected. "The website wasn't hacked, nobody got any information. What they did was try to block access for our users," Nasdaq spokesman Joseph Christinat told Reuters.
Likewise, BATS issued a statement saying that it had suffered a DDoS attack, but noted that "our trading systems were not affected and there were no exchange customer disruptions associated with the incident."
These aren't the first DDoS attacks launched against stock exchanges--though a previous, supposedly Anonymous-led campaign against the New York Stock Exchange was labeled as a fake by members of Anonymous.
This also isn't the first attack leveled specifically at Nasdaq. Notably, the Nasdaq OMX Group revealed last year that attackers had managed to hack into Nasdaq's Directors Desk, a cloud-based service designed for facilitating discussions and collaboration between senior-level executives and corporate board members, including the exchange of confidential, regulated financial information. While the company has declined to offer full details about the attack, citing an ongoing FBI investigation, security experts have noted that the hackers may have been able to glean information that could have been used for insider trading purposes.
Furthermore, according to sources briefed on the FBI's investigation, Nasdaq was "easy pickings" for attackers, owing to poor patching, firewall misconfigurations, as well as outdated software, reported Reuters. But a senior Nasdaq manager has disputed that assertion, saying that very difficult to block advanced malware--of a type he declined to specify--had been used to breach the company's defenses.
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