Winona County, MN Ransomware Attack
Winona County, Minnesota, experienced a ransomware attack that began on April 6, 2026, and continued into April 7, 2026.
Key points
- Ransomware attack initiated on April 6, 2026.
- Targeted critical systems and digital services, causing widespread disruption.
- Minnesota National Guard deployed to assist with incident response.
Connected intelligence
Signal brief
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Organization
- Published
- Apr 6, 2026
- Updated
- Jun 25, 2026
- Confidence
- Medium
- Evidence
- 1 source
Structured assessment
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Threat source
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Business impact
- Impact area
- Availability
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Winona County, Minnesota, experienced a ransomware attack that began on April 6, 2026, and continued into April 7, 2026. The attack targeted critical systems and digital services, causing significant disruptions and impairing the county's ability to provide vital emergency and critical services. The Minnesota National Guard was deployed to assist with the incident response. A cybercriminal group named 'Interlock' later claimed responsibility on April 30, 2026, stating they had stolen over 2 million files from the county. The county acknowledged the April 2026 ransomware attack and stated an investigation was ongoing.
When was this signal reported?
Shadow Tier lists Apr 6, 2026 as the signal date.
Which organization is connected to this signal?
Winonacounty is the organization connected to this public signal.
Explore WinonacountyWhich attack pattern is relevant?
This signal is connected to current ransomware incidents based on its reported incident context.
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