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The City of Columbus , Ohio ’s state capital , has confirmed that hackers slip the personal data of 500,000 resident physician during a July ransomware flak .

In afilingwith Maine ’s attorney general , Columbus confirmed that a “ strange cyber threat actor ” compromised its connection to get at information let in occupant ’ name , date of birth , address , identification documents , Social Security numbers pool , and cant account details .

The city , which is the most thickly settled in Ohio with just about 900,000 occupier , says around half a million individuals were affected , though it has not confirmed the exact bit of victim .

The regulatory filing comes after Columbus was the quarry of a ransomware attack on July 18 of this year , which the cityclaimedto have “ thwarted ” by disconnecting its web from the cyberspace .

Rhysida , the ransomware gang responsible for last year’sBritish Library cyberattack , claimed responsibility for the attack against Columbus in August . At the time , the crew said it had steal 6.5 terabytes of datum from the city in Ohio , including “ databases , internal logins and passwords of employees , a full wasteyard of server with emergency services applications of the city and … access from metropolis video recording cameras , ” agree tolocal news report .

Rhysida require for 30 bitcoin , around $ 1.9 million at the time of the cyberattack , as requital for the stolen data .

Two week after the cyberattack , Columbus mayor Andrew Ginther told the public the steal data was potential “ corrupted ” and “ unusable . ”

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The truth of Ginther ’s statement was thrown into doubt the following day after David Leroy Ross , a cybersecurity researcher also known as Connor Goodwolf , give away that the personal entropy of century of thousands of Columbus residents had been listed on the sour web .

In September , Columbus sue Ross , alleging that he was “ threaten to deal the City ’s stolen datum with third political party who would otherwise have no pronto uncommitted means by which to hold the City ’s stolen data . ” A judge file a irregular restraining order against Ross , keep him from accessing the stolen information .

In a listing on its leak site , seen by TechCrunch on Monday , Rhysida claims to have uploaded 3.1 terabytes of “ unsold ” datum stolen from Columbus , amounting to more than 250,000 files .