The group, which also took responsibility for hacking Pentagon social media accounts last month, tweeted “#CyberCaliphate Bloody Valentine’s Day #MichelleObama! We’re watching you, you girls and your husband!”
The Twitter account showed a head wrapped in a black-and-white scarf next to a banner proclaiming “CyberCaliphate.”
The “Je suIS IS” was a reference to the phrase “Je suis Charlie” that emerged last month in support of victims of the attack by Islamic militants on Charlie Hebdo in Paris that killed 12 people.
Newsweek removed the “CyberCaliphate” banner and tweets and regained control of the account within 14 minutes, the magazine said. The Islamic State militant group has seized territory in Iraq and Syria and has declared itself a “caliphate.”
The hackers also posted a message intended for the United States in retaliation for its actions in the Muslim world.
“While the U.S. and its satellites are killing our brothers in Syria, Iraq and Afghanistan, we are destroying your national cybersecurity system from inside,” it said.
The message contained a list of names under the heading “brave mujahideen.”