DALLAS — The city of Dallas issued a formal notice Thursday regarding the ransomware incident last May, detailing how an unauthorized third party downloaded city data and accessed servers for nearly a month.
An unauthorized third party downloaded the city's data from certain servers between April 7 and May 4, with the city first detecting the incident on May 3.
Since that time, the city has been engaged in an investigation into the cause of the incident and reviewing any information accessed, along with the help of a team of cybersecurity professionals.
On June 14 and the following weeks, the city said the investigation determined files containing sensitive information relating to certain people were accessed -- including full names, addresses, social security numbers, insurance information and clinical information.
The investigation is still ongoing, the city added, but the city has begun sending notice letters to those potentially involved in the incident in accordance with the law.