U.S. IRS Commissioner John Koskinen said he was confident the hackers were "not amateurs."
In addition to hacking many sites, Aljzairi posted a list of websites he deemed "vulnerable" on Facebook.
Together, the NSA and GCHQ harvested encryption keys to access global mobile communications.
The North Korean regime tries to find the silver lining in a much-circulated satellite image.
The social media network said an internal software error was the problem.
Another hoax call to GCHQ resulted in the director Robert Hannigan's mobile number being given out.
The Lizard Squad hacking group got a visit from some hackers with plans of their own.
Comey calls hackers "sloppy," says they failed to mask their IP addresses.
Xbox Live services were restored on Friday and Sony's PlayStation late Saturday following the Christmas Eve hack.
After the release of the CIA torture report, the Obama administration says, images are worse than words.
A Google executive wrote a blog post criticising the organisation based on leaks from the Sony hack
Sony sent a letter to media outlets saying they will be held responsible for losses stemming from the publication of its stolen data.
The Chinese government have promised to cooperate fully in the investigation
State-sponsored hackers are reportedly working in the secretive 'Bureau 121'
Five Sony Pictures films were leaked onto file-sharing sites by hackers last week.