MalwareManufacturingHealthcareManufacturingRansomwareData ExfiltratedTargetedIdentity (basic)Government IDFinancial accountPHIMediumActive

Mevion Medical Systems, Inc.

bd_b2c548c808904704 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 8, 2021

Filed

Jun 21, 2021

To disclose

11 weeks

Affected

71state residents only

Linked

5 filings

Confidence

66%

Full breach record for Mevion Medical Systems, Inc. →

Mevion Medical Systems notified the NH AG of a malware incident impacting 71 NH residents. Unauthorized access occurred March 28-29, 2021; discovered April 8, 2021. Data included names, SSNs, health insurance, passports, and bank details. Forensic investigation ongoing; credit monitoring offered.

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Incident timeline

undetected · 11 days

discovery → filing · 11 weeks / 74 days

Mar 28, 2021

Begins

Apr 8, 2021

Discovered

Jun 21, 2021

Filed

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

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Montana State AGbd_7e7d32019136fbc02021-06-17 · +4dCandidate
Maine State AGbd_cd98cb902cdd7b082021-06-17 · +4dVerified
Massachusetts State AGbd_d48161f16b6959192021-06-17 · +4dVerified
Indiana State AGbd_eb265913f6d9a55f2021-06-17 · +4dVerified

Name: Mevion Medical Systems, Inc.
norm: mevion medical

Name: Mevion Medical Systems, Inc.
norm: mevion medical
Industry: ManufacturingllmHealthcarellm

Discovered: Apr 8, 2021
Breach occurred: Mar 28, 2021 – Mar 29, 2021
Undetected for: 11 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 17, 2021
Affected individuals: 71state-resident count only
Data types: Identity (basic)Government IDFinancial accountPHI
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1119 Automated Collection
Threat actor: ExternalFinancial
Regulator citations: Notified Office of the New Hampshire Attorney GeneralNotified federal law enforcement and relevant state regulators

During the incident: Launched an investigation with the assistance of third-party forensic specialists
Moved quickly to investigate and respond to the incident
Assessed and improved the security of MMS systems
Provided written notice to all affected individuals
Notified federal law enforcement and relevant state regulators
Providing access to credit monitoring services for 24 months through Experian
Changes made: Implementing additional safeguards and training to its employees
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 11 weeks(74 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 AGJun 17 · first

Maine State AGJun 17 · first

Massachusetts State AGJun 17 · first

Indiana State AGJun 17 · first

New Hampshire State AG+4d · this page

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/mevion-medical-20210621.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 21, 2021
Raw hash: e4e74c8c5d2bd41adae38f9a488529de291c9a7d57cfd2bbae0993f76d9e6f82

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityMevion Medical Systems, Inc.

Victim entityMevion Medical Systems, Inc.

Incidentdiscovered Apr 8, 2021

Stated responseLaunched an investigation with the assistance of third-party forensic specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov