HackingTechnologyManufacturingInformationStolen CredentialsDelayed DiscoveryMulti-Stage ChainCustomer Data InvolvedIdentity (basic)Government IDMediumContained

M.C. Dean, Inc.

bd_01e173680331a14d · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 2, 2022

Filed

Sep 14, 2022

To disclose

15 weeks

Affected

21state residents only

Linked

7 filings

Confidence

65%

Full breach record for M.C. Dean, Inc. →

M.C. Dean, Inc. notified Montana residents of unauthorized system access occurring between Dec 24, 2021 and June 2, 2022. Discovered June 2, 2022. Personal info (names, SSNs, DOBs, driver's licenses) was accessed. M.C. Dean engaged third-party forensic specialists, notified federal law enforcement (FBI, DHS/CISA, DoD), and offered 24 months of credit monitoring.

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Incident timeline

undetected · 160 days

discovery → filing · 15 weeks / 104 days

Dec 24, 2021

Begins

Jun 2, 2022

Discovered

Sep 14, 2022

Filed

vs. sector median

4 wks faster

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

Maine State AGbd_04128297ca39bbfa2022-09-14Verified by operator
California State AGbd_13e9eaa99e2685ea2022-09-14Verified by operator
Massachusetts State AGbd_3f96f654f9e2f3362022-09-14Verified
Indiana State AGbd_6c093b6ab5c992692022-09-14Verified

Show 2 more filings ↓up to 5d gap

South Carolina State AGbd_fc506a5feae8fdb72022-09-14Verified
New Hampshire State AGbd_13de81227fda67cd2022-09-19 · +5dVerified

Name: M.C. Dean, Inc.
norm: mc dean

Name: M.C. Dean, Inc.
norm: mc dean
Industry: TechnologyllmManufacturingllm

Discovered: Jun 2, 2022
Breach occurred: Dec 24, 2021 – Jun 2, 2022
Undetected for: 160 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 21state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the FBI, DHS/CISA and DoD
Initial access: valid_credentials

During the incident: Promptly took steps to secure our systems
Conducted an investigation aided by third-party cybersecurity specialists
Notified the FBI, DHS/CISA and DoD
Continue fully cooperating with federal law enforcement to investigate this matter
Changes made: Implemented additional technical security measures designed to mitigate recurrence of this type of incident
Reviewing and enhancing existing data privacy policies and procedures
Offering you access to twenty-four (24) months of credit monitoring and identity theft protection services through Equifax
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 15 weeks(104 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 7 states

View merged incident ↗

Maine State AGSep 14 · first

California State AGSep 14 · first

Massachusetts State AGSep 14 · first

Indiana State AGSep 14 · first

South Carolina State AGSep 14 · first

Montana State AGSep 14 · first · this page

New Hampshire State AG+5d

Pattern: first filing Sep 14 (ME), last Sep 19 (NH) — a 5-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://dojmt.gov/wp-content/uploads/OCP/Consumer-Notification-Letter-564.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 14, 2022
Raw hash: 82b61db82b53bccb13a698ecc7417ecfff3db594ca6188387470571e1320801a

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityM.C. Dean, Inc.

Victim entityM.C. Dean, Inc.

Incidentdiscovered Jun 2, 2022

Stated responsePromptly took steps to secure our systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov