HackingHealthcareHealthcareStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)MediumContained

THE MEDICAL COLLEGE OF WISCONSIN, INC.

bd_de0fa02547aa70ce · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 21, 2023

Filed

Nov 14, 2023

To disclose

8 weeks

Affected

Not disclosed

Linked

5 filings

Confidence

65%

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

Medical College of Wisconsin notified consumers of a data breach involving its MOVEit Transfer vendor. Unauthorized actors accessed files containing personal information (names, addresses, SSNs, health data) on May 27, 2023. MCW discovered the incident on September 21, 2023, engaged forensic investigators, and is offering credit monitoring services.

J jump to incidentP pin to compareR raw source

Vermont clock⏱ VT AG >14 bday8 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 117 days

discovery → filing · 8 weeks / 54 days

May 27, 2023

Begins

Sep 21, 2023

Discovered

Nov 14, 2023

Filed

vs. sector median

2 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_07df4c9699a28e032023-11-14Candidate
HHS OCRbd_753d8a044dea7d712023-11-14Candidate
Massachusetts State AGbd_e2241480b3dee3962023-11-14Verified
New Hampshire State AGbd_297e007c221295502023-11-20 · +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: Healthcarellm

Discovered: Sep 21, 2023
Breach occurred: May 27, 2023
Undetected for: 117 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 14, 2023
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDHealth (basic)
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Third party: via Progress Software (MOVEit)
Initial access: supply_chain

During the incident: Engaged third-party professionals to assist in the investigation and remediation of the vulnerability
Offering a complimentary membership of Experian IdentityWorks
Set up a dedicated and confidential toll-free response line
Changes made: Review of ongoing third-party vendor relationships
Continually evaluate and modify practices and internal controls to enhance the security and privacy of your information
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(54 days from discovery to filing)
Compliance flags: VT AG >14 bday
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

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

Massachusetts State AGNov 14 · first

Vermont State AGNov 14 · first · this page

New Hampshire State AG+6d

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://ago.vermont.gov/document/2023-11-14-medical-college-wisconsin-progress-software-moveit-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 14, 2023
Raw hash: 8dc738381602fda50f234b51e10ec696b0215bb0c25c322873e4c7518e852b10

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 responseEngaged third-party professionals to assist in the investigation and remediation of the vulnerability

ComplianceVT AG >14 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov