DisclosureLens
GLOBALMalwareHealthcareHealthcareRansomwareWorldleaksRansom DemandedActor NamedMedium

MADISON HEALTHCARE SERVICES

bd_e6ab31efa991ef80 · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Aug 6, 2025

To disclose

—

Affected

Not disclosed

Linked

2 filings

Confidence

50%
Full breach record for MADISON HEALTHCARE SERVICES →

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Worldleaks 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: HealthcareDiscovered: 2025-09-23
Listing address (not linked): https://worldleaksartrjm3c6vasllvgacbi5u3mgzkluehrzhk2jz4taufuid.onion/companies/3970341507View merged incident timeline

Source: Ransomware.live

Post text · scraped from the leak site

Madison Healthcare Services is a US-based healthcare organization located in Madison, Minnesota. They offer an array of health services such as hospital care, assisted living, home health, and clinic services. They are dedicated to delivering comprehensive medical services and providing a nurturing environment for their residents, patients, and clientele. The organization also emphasizes health education and community outreach.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Aug 6, 2025

Claim posted

—

Corroborated · see linked filings

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Claim → filing

—

Compliance clock

Not assessable

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Filing propagation · 2 filings

View merged incident ↗
Leak SiteAug 6 · first · this page
HHS OCR+118d

Pattern: first filing Aug 6, last Dec 2 (MN) — a 118-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 2022-06-23

worldleaks

According to ransomware.live, World Leaks emerged in January 2025 as a rebrand of the Hunters International ransomware operation, shifting its focus from file encryption to solely stealing sensitive data and threatening to leak it unless a ransom is paid

187 tracked hereFull profile →