MalwareTechnologyInformationRansomwareData EncryptedEmployee Data InvolvedTargetedIdentity (basic)Government IDFinancial accountHealth (basic)MediumContained

THE MATHWORKS, INC.

bd_322d9e427a10787d · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 18, 2025

Filed

Aug 22, 2025

To disclose

14 weeks

Affected

87state residents only

Linked

6 filings

Confidence

64%

Full breach record for THE MATHWORKS, INC. →2 incidents on file

The MathWorks, Inc. notified the New Hampshire Attorney General of a ransomware incident discovered on May 18, 2025, affecting approximately 87 state residents. Unauthorized access occurred between April 17 and May 18, 2025, resulting in the encryption of servers and access to employee personal information, including SSNs and financial data. MathWorks engaged forensic experts, law enforcement, and provided 24 months of credit monitoring to affected individuals.

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Incident timeline

undetected · 31 days

discovery → filing · 14 weeks / 96 days

Apr 17, 2025

Begins

May 18, 2025

Discovered

Aug 22, 2025

Filed

vs. sector median

5 wks faster

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Nebraska State AGbd_4bf77f34db66f0942025-08-22Verified
Massachusetts State AGbd_8a62dfb399a78aa12025-08-22Verified
Vermont State AGbd_bec866f4fc6ad97c2025-08-22Verified
Indiana State AGbd_d1190c797ad3efd02025-08-22Verified

Show 1 more filing ↓

Maine State AGbd_d9f75e60d4bfd2a32025-08-22Candidate

Name: ROPES & GRAY LLP
norm: ropes gray

Name: THE MATHWORKS, INC.
norm: the mathworks
Industry: Technologyllm

Discovered: May 18, 2025
Breach occurred: Apr 17, 2025 – May 18, 2025
Undetected for: 31 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 22, 2025
Affected individuals: 87state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Initiated its incident response protocols
Mobilized senior management
Notified federal law enforcement
Engaged third-party forensic experts to conduct a comprehensive review of the impacted systems and to assist with containment, eradication of the threat actor, and remediation
Isolating its network from the internet
Breaking the threat actor’s command and control
Allowing for the secure clearing of systems
Performed an audit of privileged accounts and reset all privileged account passwords as well as the privileged service accounts
Reset passwords of critical infrastructure, such as ESXi servers, firewalls, and switches
Blocked and deny-listed all threat actor-related backdoors and IP addresses in its various security tools stacks
Isolated and removed all compromised hosts from the network
Hardened all remote access to the MathWorks network
Broadened existing multifactor authentication
Engaged a third party to conduct dark web monitoring
Changes made: Hardened all remote access to the MathWorks network
Broadened existing multifactor authentication
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 14 weeks(96 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Nebraska State AGAug 22 · first

Massachusetts State AGAug 22 · first

Vermont State AGAug 22 · first

Indiana State AGAug 22 · first

Maine State AGAug 22 · first

New Hampshire State AGAug 22 · first · 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/mathworks-20250822.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 22, 2025
Raw hash: 9112ed4c5c7af3bc25ff57a8cde5ad7f0f1f1224b45505bf882f88efb04d9764

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityROPES & GRAY LLP

Victim entityTHE MATHWORKS, INC.

Incidentdiscovered May 18, 2025

Stated responseInitiated its incident response protocols

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov