HackingHealthcareEducationHealthcareVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPIIIdentity (basic)LowContained

THE MEDICAL COLLEGE OF WISCONSIN, INC.

bd_297e007c22129550 · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 21, 2023

Filed

Nov 20, 2023

To disclose

9 weeks

Affected

17state residents only

Linked

5 filings

Confidence

66%

Full breach record for THE MEDICAL COLLEGE OF WISCONSIN, INC. →7 incidents on file

Medical College of Wisconsin notified NH AG of a third-party vendor breach involving MOVEit Transfer. Unauthorized access occurred on or about May 27, 2023, discovered Sept 21, 2023. ~17 NH residents affected with PII. MCW patched the system, engaged forensic investigators, and offered credit monitoring.

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Incident timeline

undetected · 117 days

discovery → filing · 9 weeks / 60 days

May 27, 2023

Begins

Sep 21, 2023

Discovered

Nov 20, 2023

Filed

vs. sector median

1 wks faster

This filing is one of 5 filings about the same incident.View merged incident

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Montana State AGbd_07df4c9699a28e032023-11-14 · +6dCandidate
HHS OCRbd_753d8a044dea7d712023-11-14 · +6dCandidate
Vermont State AGbd_de0fa02547aa70ce2023-11-14 · +6dCandidate
Massachusetts State AGbd_e2241480b3dee3962023-11-14 · +6dVerified

Name: THE MEDICAL COLLEGE OF WISCONSIN, INC.
norm: the medical college of wisconsin

Name: THE MEDICAL COLLEGE OF WISCONSIN, INC.
norm: the medical college of wisconsin
Industry: HealthcarellmEducationllm

Discovered: Sep 21, 2023
Breach occurred: May 27, 2023
Undetected for: 117 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 14, 2023
Affected individuals: 17state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Initial access: exploit_public_facing

During the incident: Contained the incident through patches
Commenced a prompt and thorough investigation in consultation with external forensic investigators and data privacy professionals
Engaged third-party professionals to assist in the investigation and remediation of the vulnerability
Provided written notification to affected residents
Offered complimentary credit monitoring services through Experian IdentityWorks
Changes made: Applied patches to the MOVEit Transfer solution
Review of ongoing third-party vendor relationships
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 9 weeks(60 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Montana State AGNov 14 · first

HHS OCRNov 14 · first

Vermont State AGNov 14 · first

Massachusetts State AGNov 14 · first

New Hampshire State AG+6d · this page

Pattern: first filing Nov 14 (MT), last Nov 20 (NH) — a 6-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

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

Press / market report

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

State AG / regulator filingThis record

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

SEC 8-K / victim statement

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

Source URL: https://mm.nh.gov/files/uploads/doj/remote-docs/medical-college-wisconsin-20231120.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 20, 2023
Raw hash: f0fa8893aa17a8eabfa3d5c7ec9668b26f6a91f1947eecea65732309e321b4d1

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityTHE MEDICAL COLLEGE OF WISCONSIN, INC.

Victim entityTHE MEDICAL COLLEGE OF WISCONSIN, INC.

Incidentdiscovered Sep 21, 2023

Stated responseContained the incident through patches

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov