HackingFinancial ServicesFinanceVulnerability ExploitZero-DayData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumActive

Sunflower Bank, National Association

bd_46ae3c2793a32792 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Aug 14, 2023

Filed

Oct 2, 2023

To disclose

7 weeks

Affected

23state residents only

Linked

8 filings

Confidence

66%

Full breach record for Sunflower Bank, National Association →

Sunflower Bank, N.A. filed a supplemental data security incident notice with the New Hampshire Attorney General regarding a MOVEit zero-day vulnerability exploit. The bank notified 23 New Hampshire residents starting August 14, 2023. The incident involved unauthorized access via a third-party software vulnerability, resulting in the exfiltration of customer data. The bank is offering credit monitoring services to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 7 weeks / 49 days

Aug 14, 2023

Discovered

Oct 2, 2023

Filed

vs. sector median

1 wks faster

This filing is one of 8 about the same incident.View merged incident

Part of Progress Software Corporation supply-chain incident (2023) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (7) · sorted by filing gap

California State AGbd_fea17e438a10a5c62023-10-04 · +2dVerified
Massachusetts State AGbd_57054109e6719b1e2023-08-22 · +41dVerified
California State AGbd_895de35e1cea98f02023-08-15 · +48dVerified
Montana State AGbd_b791064e55b0bfd82023-08-15 · +48dVerified

Show 3 more filings ↓up to 80d gap

New Hampshire State AGbd_ef42af6291b75a202023-08-15 · +48dVerified
Indiana State AGbd_791c96ad5aceed032023-08-14 · +49dVerified
SEC 8-Kbd_d36ee2ad177829e82023-07-14 · +80dVerified

Name: Nelson Mullins Riley & Scarborough LLP
norm: nelson mullins riley scarborough

Name: Sunflower Bank, National Association
norm: sunflower bank national
Industry: financial_services
Industry: Financial Servicesllm

Discovered: Aug 14, 2023
Materiality determined: —
Notification sent: Aug 15, 2023
Affected individuals: 23state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Initial access: exploit_public_facing

During the incident: Began issuing notices to potentially affected individuals
Provided notice to the Office of New Hampshire Attorney General
Continued its investigation
Conducted a voluminous document review process (which involved programmatic searching and hand reviewing of individual documents) to identify additional individuals
Changes made: Offering complimentary 12/24-month membership to Experian’s IdentityWorks product
Providing information on steps to take including placing security freezes on credit files
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 7 weeks(49 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 8 filings · 5 states

View merged incident ↗

SEC 8-KJul 14 · first

Indiana State AG+31d

California State AG+32d

Montana State AG+32d

New Hampshire State AG+32d

Massachusetts State AG+39d

New Hampshire State AG+80d · this page

California State AG+82d

Pattern: first filing Jul 14, last Oct 4 (CA) — a 82-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://mm.nh.gov/files/uploads/doj/remote-docs/sunflower-bank-20231002.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 2, 2023
Raw hash: 82875acebe46f1a5a8ec220b7980e93d9fb053ff3830be0932a8244230b370db

Linked disclosures

Regulatory filings (7) · sorted by filing gap

Reporting entityNelson Mullins Riley & Scarborough LLP

Victim entitySunflower Bank, National Association

Incidentdiscovered Aug 14, 2023

Stated responseBegan issuing notices to potentially affected individuals

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov