DisclosureLens
GLOBALMalwareEducationEducationRansomwareMedusaRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

Hinsdale School District

bd_da1e9f64fed7899b · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Dec 11, 2023

To disclose

—

Affected

Not disclosed

Linked

2 records

Confidence

50%
Full breach record for Hinsdale School District →2 incidents on file

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Medusa 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: EducationDiscovered: 2023-12-11

Source: Ransomware.live

Post text · scraped from the leak site

Hinsdale School District is an educational institution. It offers primary & high school education, job openings, professional development, financial information, and assessment. The school district was established in 1879 and is headquartered in Hinsdal,New Hampshire, 03451, United States

Incident timeline — mostly unverified

? — ?

Breach window unknown

Dec 11, 2023

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 2 records about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

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 2023-01-11

medusa

According to ransomware.live, Medusa is a ransomware-as-a-service operation active since June 2021 that has targeted over 300 victims across critical infrastructure sectors including healthcare, education, legal, and manufacturing using double-extortion, with attacks surging 42% between 2023 and 2024 and a formal CISA advisory issued in early 2025.

565 tracked hereFull profile →