HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Data ExfiltratedIdentity (basic)Government IDFinancial accountMediumContained

MidFirst Bank

bd_3f83236ccf1420dd · schema v1 · pii pii-v1

Severity

Medium

Discovered

—

Filed

Aug 21, 2023

To disclose

—

Affected

659state residents only

Linked

5 filings

Confidence

66%

Full breach record for MidFirst Bank →2 incidents on file

MidFirst Bank notified customers of a data security incident involving its third-party file transfer provider, MOVEit. Between May 27-31, 2023, an unauthorized party downloaded files containing customer names, SSNs, and account numbers. MidFirst offered 24 months of identity monitoring via OnAlert.

J jump to incidentP pin to compareR raw source

Incident timeline

May 27, 2023

Begins

Aug 21, 2023

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

Massachusetts State AGbd_5eec0209f5842ab82023-08-21Verified
Oregon State AGbd_63b23748175961ff2023-08-21Verified
California State AGbd_e933a0e5fa8c3b692023-08-21Verified
Washington State AGbd_4cdab9b39b8d07192023-08-04 · +17dCandidate

Name: MidFirst Bank
norm: midfirst bank
Domain: midfirst.com

Name: MidFirst Bank
norm: midfirst bank
Domain: midfirst.com
Industry: Financial Servicesllm

Discovered: —
Breach occurred: May 27, 2023 – May 31, 2023
Materiality determined: —
Notification sent: Aug 18, 2023
Affected individuals: 659state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Initial access: supply_chain

During the incident: Offering a complimentary, 24-month membership to OnAlertTM (Essential Bundle) from ChexSystems
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.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Washington State AGAug 4 · first

Massachusetts State AG+17d

Oregon State AG+17d

California State AG+17d

Montana State AG+17d · this page

Pattern: first filing Aug 4 (WA), last Aug 21 (MT) — a 17-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-578.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 21, 2023
Raw hash: 7fdb0d99ca335872778b25277fe537a9d4a7b96e5f45e9e1d4b0b3f5def911d2

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityMidFirst Bank

Victim entityMidFirst Bank

IncidentThird-Party / Supply Chain

Stated responseOffering a complimentary, 24-month membership to OnAlertTM (Essential Bundle) from ChexSystems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov