DisclosureLens
GLOBALMalwareHealthcareHealthcareRansomwareQilinRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

Columbia Medical Practice

bd_d270903e72841761 · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Nov 5, 2025

To disclose

—

Affected

Not disclosed

Linked

5 records

Confidence

50%
Full breach record for Columbia Medical Practice →2 incidents on file

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Qilin 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: 2025-11-25
View aggregator listing on ransomware.liveView merged incident timeline

Source: Ransomware.live

Incident timeline — mostly unverified

? — ?

Breach window unknown

Nov 5, 2025

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 (4) · sorted by filing gap

Filing propagation · 4 filings · 4 states

View merged incident ↗
HHS OCRDec 5 · first
Maine State AG+140d
New Hampshire State AG+140d
Massachusetts State AG+140d

Pattern: first filing Dec 5 (MD), last Apr 24 (MA) — a 140-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 2022-10-08

qilin

According to ransomware.live, Qilin ransomware was first observed in July of 2022. Qilin Ransomware is written in Golang and supports multiple encryption modes; all of which are controlled by the operator. Qilin actors practice double extortion – demanding payment for a decryptor, as well as for the non-release of stolen data.

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