DuPage County, Illinois, confirmed a ransomware attack targeting several key offices on April 28, 2025. The Sheriff’s Office, 18th Judicial Circuit Court, and Circuit Court Clerk’s Office were affected by the attack. Systems were taken offline to investigate the full scope of the breach, although no impact on jail operations was reported. In-person court hearings were expected to proceed as planned despite the disruption.
The attack, first detected at 2:30 AM, also caused an outage in the Sheriff’s Office and County Courthouse.
The impact on other County operations was minimal, with most services continuing as scheduled. However, Chancery sales in the Sheriff’s Office were canceled for the week. The County ensured that public safety was not affected, as jail operations remained unaffected.
DuPage County officials are working with the FBI and Secret Service to investigate the ransomware incident. The Sheriff’s Office confirmed there was no effect on jail operations or on public safety. The County is focused on determining the full scope of the attack and ensuring that all services resume as soon as possible.
The investigation remains ongoing, with further details expected soon.
DuPage County’s response demonstrates their commitment to resolving the situation while maintaining essential services. As the investigation continues, the County is prioritizing coordination with law enforcement agencies to mitigate the impact of the attack. Additional updates will be provided as more information becomes available regarding the breach and its resolution.
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