Media companies, including The New York Times, Twitter and the Huffington Post, lost control of some of their websites on Tuesday after hackers supporting the Syrian government breached the Australian Internet company that manages many major site addresses.
The Syrian Electronic Army (SEA), a hacker group that has attacked media organizations it considers hostile to Syrian President Bashar al-Assad, claimed credit for the Twitter and Huffington Post hacks in a series of Twitter messages.
"Media is going down," a message at the SEA Twitter account proclaimed.
The New York Times site remained out of service early Wednesday following the attacks. Security experts said electronic records showed that nytimes.com redirected visitors to a server controlled by the Syrian group before it went dark.
New York Times Co spokeswoman Eileen Murphy tweeted that the "issue is most likely the result of a malicious external attack," based on an initial assessment.
The Huffington Post attack was limited to the blogging platform's British Web address. Twitter said the hack led to availability issues for 90 minutes but that no user information was compromised.
The attacks came as the Obama administration considers taking military action against the Syrian government, engaged in a civil war against rebels for more than two years.
In August, hackers promoting the SEA targeted websites belonging to CNN, Time and The Washington Post by breaching a third party service used by those sites.
The SEA managed to gain control of the sites by penetrating MelbourneIT, an Australian Internet service provider that sells and manages domain names including Twitter.com and nytimes.com.
The New York Times, which identified MelbourneIT as its domain name registrar and the main hacking victim, told employees not to send sensitive e-mails from corporate accounts.
MelbourneIT tracked the breach to an Indian Internet service provider, saying two staff members from one of their resellers opened a fake e-mail seeking login details.
"The SEA went after the company specifically to create a high-profile event," CEO Theo Hnarakis told Reuters. One staff member was the direct manager of the nytimes domain, along with other media companies, and had the login and password information of the company in his e-mail, which the hackers accessed.
Hnarakis confirmed other media organizations were also attacked, but this proved unsuccessful as their customers used a secondary security measure known as a registry lock.
MelbourneIT said it restored the correct domain name settings, changed the password on the compromised account, and locked the records to prevent further alterations.
Twitter did not respond to requests for comment. In a blog post, the company said, "it appears DNS (domain name system) records for various organizations were modified, including one of Twitter's domains used for image serving, Twimg.com. Viewing of images and photos was sporadically impacted."