DisclosureLens
GLOBALMalwareGovernmentGovernmentRansomwareInterlockRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

Winona County

bd_b4a4ad03d964689f · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

May 1, 2026

To disclose

—

Affected

Not disclosed

Linked

5 records

Confidence

50%
Full breach record for Winona County →2 incidents on file

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Interlock on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.

Group activity: Public SectorDiscovered: 2026-05-01

Source: Ransomware.live

Post text · scraped from the leak site

Winona County is located in the Mississippi River blufflands of southeastern Minnesota. They have been negligent regarding security and the data they store, which has resulted in a breach and the public disclosure of all the confidential data they held. As a result, we are now able to offer you a large database containing resident records, tax and budget documents, police records, and data from other institutions.

Incident timeline — mostly unverified

? — ?

Breach window unknown

May 1, 2026

Claim posted

—

Corroborated · see linked filings

This record's own dates cannot anchor compliance clocks; see the linked filings.

Claim → filing

—

Compliance clock

Not assessable

This leak-site claim is one of 5 records about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Press reports (1)

Filing propagation · 3 filings · 3 states

View merged incident ↗

Pattern: first filing Oct 1 (MA), last Oct 14 (NH) — a 13-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claimThis record

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source ceiling

  • actor name
  • victim claim
  • ransom/leak status
  • discovery date
  • materiality
  • notification
  • affected count
  • confirmed data types
  • compliance clock

The ✕ fields stay blank until a regulatory filing or victim disclosure lands.

About this groupFirst seen 2023-12-01

interlock

According to ransomware.live, Interlock is a ransomware group first observed in September 2024 that targets critical infrastructure sectors including healthcare, government, education, and technology across North America and Europe using double-extortion, with 57+ claimed victims including a major US dialysis provider exposing over two million patient records.

141 tracked hereFull profile →