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Co cybersecurity incidents and threat signals
co.winona.mn.us
This company page brings together public reporting currently associated with Co. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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June 25, 2026
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Based on all published signals currently linked to Co. Affected countries come from victim data; the company country above remains a separate profile fact. Counts describe this reporting set, not overall incident prevalence.
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Winona County, Minnesota, Hit by Medusa Ransomware Attack
Winona County, Minnesota, experienced a ransomware attack on April 8, 2026, attributed to the Medusa ransomware group. The attack severely disrupted critical county systems and municipal services, forcing systems offline and delaying public services. The incident prompted the deployment of the National Guard to support recovery efforts, indicating a significant impact on the county's operations and potential data exfiltration.
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What does the Co page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Co.
Does every mention of Co appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.