FEDERALItem 8.01 · voluntaryHackingFinancial ServicesFinanceVulnerability ExploitZero-DaySupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedGovernment IDFinancial accountMediumActive

PlainsCapital Bank

bd_651ddcbce2bbcb28 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 27, 2023

Filed

Jul 3, 2023

To disclose

6 days

Affected

Not disclosed

Linked

4 filings

Confidence

67%

Full breach record for PlainsCapital Bank →2 incidents on file

Hilltop Holdings Inc. disclosed that its subsidiary, PlainsCapital Bank, was affected by a security incident involving a third-party vendor. The vendor experienced a breach targeting a zero-day vulnerability in the MOVEit Transfer Application, resulting in the likely exfiltration of customer data, including social security numbers and account numbers. The company launched an investigation and plans to offer credit monitoring to affected customers.

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Incident timeline

discovery → filing · 6 days

Jun 27, 2023

Discovered

Jul 3, 2023

Filed

vs. sector median

8 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_6a16364945d087db2023-07-14 · +11dCandidate
Montana State AGbd_d0fa7306adbe4d642023-07-14 · +11dVerified
Massachusetts State AGbd_d9af88ecfff56b232023-07-14 · +11dVerified

Name: Hilltop Holdings Inc.
norm: hilltop holdings
SEC CIK: 0001265131

Name: PlainsCapital Bank
norm: plainscapital bank
Also named: Hilltop Holdings Inc.operating subsidiary ofholding company
Industry: Financial Servicesllm

Discovered: Jun 27, 2023
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Government IDFinancial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1195 Supply Chain Compromise
Threat actor: External
Regulator citations: Committed to ensuring that appropriate notifications are provided to impacted customers and to regulatory agencies as required by federal and state law
Initial access: supply_chain

During the incident: Launched an investigation to determine the scope and nature of any Bank customer data that may have been impacted
Working with other vendors for the Bank and the Company's broker-dealer and mortgage origination segments to determine whether they were similarly impacted by the MOVEit vulnerability
Changes made: Plans to offer impacted customers, at their election, complimentary credit monitoring and identity restoration services
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 days(6 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 · this page

California State AG+11d

Montana State AG+11d

Massachusetts State AG+11d

Pattern: first filing Jul 3, last Jul 14 (MA) — 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 filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statementThis record

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://www.sec.gov/Archives/edgar/data/1265131/000110465923077393/
DisclosureLens renders the full SEC/HHS filing inline below from the originating regulator’s public record (§4.5 fair report privilege).
Filed at: Jul 3, 2023
Raw hash: 58c2e6797415c06cdcec5041b724582484a591ccb08ea965655a052079c01ffc

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Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHilltop Holdings Inc.

Victim entityPlainsCapital Bank

Incidentdiscovered Jun 27, 2023

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.sec.gov

Source filing