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Twitter today finally decided to temporarily disable a feature, called ‘Tweeting via SMS,’ after it was abused by a hacking group to compromise Twitter CEO Jack Dorsey last week and sent a series of racist and offensive tweets to Dorsey’s followers.

Dorsey’s Twitter account was compromised last week when a hacker group calling itself “Chuckling Squad” replicated a mobile phone number associated with the CEO account and abused this particular feature to post racist, offensive messages and bomb threats from it via SMS.

Replicating a mobile phone number associated with someone else is a technique known as “SIM swapping,” where attackers social engineer a victim’s mobile phone provider and trick the telecom company to transfer target’s phone number to their own SIM card.

images from Hacker News