UnknownManufacturingManufacturingCustomer Data InvolvedPIIIdentity (basic)Financial accountLow

Thyssen Mining

bd_1dc65b860bb3c408 · schema v1 · pii pii-v1

Severity

Low

Discovered

—

Filed

Dec 5, 2025

To disclose

—

Affected

32state residents only

Confidence

68%

Full breach record for Thyssen Mining →

Thyssen Mining Inc. issued a consumer notification letter in Montana regarding a cybersecurity incident. The company is offering 24 months of complimentary credit monitoring and fraud assistance via TransUnion/Cyberscout to affected individuals. The letter details steps to protect personal information, including fraud alerts and security freezes. Specifics of the breach mechanism, dates, and affected data types are not explicitly detailed in the provided text, though credit monitoring implies financial/identity data exposure.

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Incident timeline — partial

? — ?

Breach window unknown

Dec 5, 2025

Filed

No interval is drawn: no breach start or discovery date is on record for this filing.

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed32 affectedView incident

Name: Thyssen Mining
norm: thyssen mining

Name: Thyssen Mining
norm: thyssen mining
Industry: Manufacturingllm

Discovered: —
Materiality determined: —
Notification sent: —
Affected individuals: 32state-resident count only
Data types: PIIIdentity (basic)Financial account
Attack vector: Unknown

During the incident: Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge for 24 months
Providing proactive fraud assistance through Cyberscout, a TransUnion company
Sending notification letters to affected individuals
Source: Quoted from the filing itself, not independently verified.

Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

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://dojmt.gov/wp-content/uploads/2026/01/Consumer-notification-letter-26.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 5, 2025
Raw hash: 3b02c1515f0f1baec1f5ecf129db5493931973506927726390f07ff74097cef7

Reporting entityThyssen Mining

Victim entityThyssen Mining

IncidentUnknown

Stated responseProviding access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge for 24 months

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov