HackingFinancial ServicesFinanceVulnerability ExploitZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Auto Club Trust, FSB

bd_3e3e7062c5764996 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 10, 2023

Filed

Oct 6, 2023

To disclose

8 weeks

Affected

11state residents only

Confidence

65%

Full breach record for Auto Club Trust, FSB →2 incidents on file

Auto Club Trust, FSB notified Montana customers of a data breach involving its third-party service provider's MOVEit system. An unauthorized party exploited a previously unknown vulnerability (zero-day) between May 29-30, 2023, to exfiltrate files containing customer PII including names, SSNs, driver's licenses, and financial account data. The company discovered the incident around August 10, 2023, and offered two years of credit monitoring.

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Incident timeline

undetected · 73 days

discovery → filing · 8 weeks / 57 days

May 29, 2023

Begins

Aug 10, 2023

Discovered

Oct 6, 2023

Filed

vs. sector median

1 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed11 affectedView incident

Name: Auto Club Trust, FSB
norm: auto club trust fsb

Name: Auto Club Trust, FSB
norm: auto club trust fsb
Industry: Financial Servicesllm

Discovered: Aug 10, 2023
Breach occurred: May 29, 2023 – May 30, 2023
Undetected for: 73 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 6, 2023
Affected individuals: 11state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security numberDate of birth
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Third party: via Third-party service provider (MOVEit user)
Initial access: exploit_public_facing

During the incident: Arranged to offer an identity monitoring and credit education service to affected individuals for two years at no cost
Launched an investigation to determine its nature and scope
Changes made: Offered identity protection and credit monitoring services provided by ChexSystems for two years
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 8 weeks(57 days from discovery to filing)
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/OCP/Consumer-notification-letter-755.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 6, 2023
Raw hash: 38362d52c4501069dc9cf847cd705b7028b7d84bb5bfcb8f565b3f91aafba667

Reporting entityAuto Club Trust, FSB

Victim entityAuto Club Trust, FSB

Incidentdiscovered Aug 10, 2023

Stated responseArranged to offer an identity monitoring and credit education service to affected individuals for two years at no cost

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov