HackingFinancial ServicesFinanceData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Onset Financial, Inc.

bd_e45ce5167177893d · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 2, 2025

Filed

Dec 12, 2025

To disclose

32 weeks

Affected

11state residents only

Linked

4 filings

Confidence

66%

Full breach record for Onset Financial, Inc. →

Onset Financial, Inc. notified Montana residents of a network security incident occurring on May 2, 2025. Unauthorized access led to the potential exposure of PII including SSNs, driver's licenses, and financial account numbers. The company engaged cybersecurity experts, restored systems, and offered 12 months of credit monitoring. No evidence of misuse was found.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 32 weeks / 224 days

May 2, 2025

Begins

May 2, 2025

Discovered

Dec 12, 2025

Filed

vs. sector median

+23 wks slower

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

Nebraska State AGbd_2fb86203f3e55d042025-12-12Verified
Indiana State AGbd_feed826ad430f3452025-12-12Verified
Massachusetts State AGbd_246b190e4f6afb842025-12-13 · +1dVerified

Name: Onset Financial, Inc.
norm: onset financial

Name: Onset Financial, Inc.
norm: onset financial
Industry: Financial Servicesllm

Discovered: May 2, 2025
Breach occurred: May 2, 2025
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 12, 2025
Affected individuals: 11state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1119 Automated Collection
Threat actor: ExternalFinancial
Initial access: exploit_public_facing

During the incident: Engaged cybersecurity experts to conduct an investigation
Conducted an investigation with the assistance of IT specialists
Confirming the security of our network environment
Triaged and have restored affected systems
Taken steps to bolster our network security
Providing you with access to Triple Bureau Credit Monitoring/Triple Bureau Credit Report/Triple Bureau Credit Score services at no charge
Providing you with proactive fraud assistance
Changes made: Reviewing and revising technical safeguards and enhancements
Reviewed and taken steps to enhance our policies and procedures relating to the security of our systems
Enhanced our information life cycle management
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 32 weeks(224 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 · 4 states

View merged incident ↗

Nebraska State AGDec 12 · first

Indiana State AGDec 12 · first

Montana State AGDec 12 · first · this page

Massachusetts State AG+1d

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/2026/03/Consumer-notification-letter-6.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 12, 2025
Raw hash: e4baf060e0cecd29aef04daa3554c5907b74a2f820f8ede247edf0f4f9295170

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityOnset Financial, Inc.

Victim entityOnset Financial, Inc.

Incidentdiscovered May 2, 2025

Stated responseEngaged cybersecurity experts to conduct an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov