More than 400 million Twitter users may have had their personal details stolen and put up for sale online in a major cyber attack.
A cyber crook claims to be selling the stolen data of hundreds of millions of users including celebrities, businesses and government organisations on an online hacking forum.
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The author of the post shared two samples of supposedly stolen data, with former Australian Prime Minister Scott Morrison among the users they claim are affected.
The user profiles up for sale contain public and private Twitter data, including people’s email addresses, names, usernames and phone numbers.
A system vulnerability last year allowed the data to be stolen before the issue was fixed in early 2022, the hacker claims.
The hacker directly addressed Twitter CEO Elon Musk, saying his company is already facing repercussions from European authorities for an earlier data leak and that he should buy the stolen data to prevent further drama.
“Just imagine famous content creators and influencers getting hacked on Twitter that will for sure make them ghost the platform and ruin your dream,” the threat actor wrote in the ad.
“If you are unsure just run a poll on Twitter like usual and people will choose their fate, because at the end of the day it’s the company’s fault that this data was breached.”
The hacker told information security site Bleeping Computer they are trying to sell Twitter the data for $US200,000 ($A297,000) and will then delete it, or they will sell copies to multiple people for $US60,000 ($A89,000) a sale.
Twitter is yet to comment on the breach claims.
The platform is already in hot water after the Irish Data Protection Commission launches an investigation into the recent publishing of 5.4 million user records stolen last year.
The company risks massive fines as the European Union’s top privacy regulator probes the suspected data breach.
7NEWS.com.au has approached Twitter for comment.
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