HackingFinancial ServicesFinanceVulnerability ExploitSupply Chain (3P Vendor)Zero-DayCustomer Data InvolvedPIIIdentity (basic)LowContained

PlainsCapital Bank

bd_d0fa7306adbe4d64 · schema v1 · pii pii-v1

Severity

Low

Discovered

Jun 27, 2023

Filed

Jul 14, 2023

To disclose

17 days

Affected

48state residents only

Linked

4 filings

Confidence

65%

Full breach record for PlainsCapital Bank →2 incidents on file

PlainsCapital Bank notified customers of a data breach stemming from a third-party vendor's exposure to the MOVEit zero-day cyberattack. The incident, discovered on June 27, 2023, likely impacted customer personal information. The Bank investigated, engaged the vendor to apply security patches, and offered 12 months of complimentary credit monitoring and identity restoration services to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 17 days

Jun 27, 2023

Begins

Jun 27, 2023

Discovered

Jul 14, 2023

Filed

vs. sector median

6 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

California State AGbd_6a16364945d087db2023-07-14Candidate
Massachusetts State AGbd_d9af88ecfff56b232023-07-14Verified
SEC 8-Kbd_651ddcbce2bbcb282023-07-03 · +11dVerified

Name: PlainsCapital Bank
norm: plainscapital bank

Name: PlainsCapital Bank
norm: plainscapital bank
Industry: Financial Servicesllm

Discovered: Jun 27, 2023
Breach occurred: Jun 27, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jul 14, 2023
Affected individuals: 48state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Initial access: supply_chain

During the incident: Launched an investigation to determine the scope and nature of any PlainsCapital Bank customer data that may have been impacted
Initiated a dialogue with the Vendor
Providing you with the option for complimentary access to 12 months of credit monitoring and identity restoration services provided by Cyberscout through Identity Force, a TransUnion company
Changes made: Vendor has assured us that all software security patches have been applied to their affected systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 days(17 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 3 states

View merged incident ↗

SEC 8-KJul 3 · first

California State AG+11d

Massachusetts State AG+11d

Montana State AG+11d · this page

Pattern: first filing Jul 3, last Jul 14 (MT) — a 11-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-433.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jul 14, 2023
Raw hash: 47d4f9e3cfb881dc5d498c305ee34993b54f6052084085e70d20386526723b1a

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityPlainsCapital Bank

Victim entityPlainsCapital Bank

Incidentdiscovered Jun 27, 2023

Stated responseLaunched an investigation to determine the scope and nature of any PlainsCapital Bank customer data that may have been impacted

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov