MalwareGovernmentGovernmentRansomwareData ExfiltratedData EncryptedTargetedIdentity (basic)Government IDMediumContained

Union County, Ohio

bd_c253643f9c1cb792 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 18, 2025

Filed

Oct 6, 2025

To disclose

20 weeks

Affected

20state residents only

Linked

3 filings

Confidence

66%

Full breach record for Union County, Ohio →

Union County, Ohio notified the New Hampshire Attorney General of a ransomware incident. Unauthorized access occurred May 6-18, 2025, detected May 18, 2025. Names and SSNs of 20 NH residents were compromised. Notices sent Sept 24, 2025, including credit monitoring.

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Incident timeline

undetected · 12 days

discovery → filing · 20 weeks / 141 days

May 6, 2025

Begins

May 18, 2025

Discovered

Oct 6, 2025

Filed

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Montana State AGbd_2902fd2c45650c272025-09-24 · +12dCandidate
Maine State AGbd_e13fd488600b1f812025-09-24 · +12dVerified

Name: Union County, Oregon
norm: union county oregon

Name: Union County, Ohio
norm: union county ohio
Industry: Governmentllm

Discovered: May 18, 2025
Breach occurred: May 6, 2025 – May 18, 2025
Undetected for: 12 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 24, 2025
Affected individuals: 20state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified Attorney General John FormellaNotifying all appropriate state regulators

During the incident: Launched an investigation with assistance from nationally recognized third-party cybersecurity and data forensics consultants
Alerted federal law enforcement
Conducted a thorough review of the impacted data
Notifying all appropriate state regulators
Monitoring internet sources
Changes made: Deployed security tools to enhance detection and accelerate response to cyber incidents
Continuing to actively monitor its network using end point detection tools
Conducted enterprise-wide password reset
Strengthened restrictions for external network access
Evaluating steps to further bolster its cyber defenses
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 weeks(141 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Montana State AGSep 24 · first

Maine State AGSep 24 · first

New Hampshire State AG+12d · this page

Pattern: first filing Sep 24 (MT), last Oct 6 (NH) — a 12-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/union-county-ohio-20251006.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 6, 2025
Raw hash: ea7746b059fc21297f6f89fe24ca908dd7b01afdbb38bc88c343065d8d615a7e

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityUnion County, Oregon

Victim entityUnion County, Ohio

Incidentdiscovered May 18, 2025

Stated responseLaunched an investigation with assistance from nationally recognized third-party cybersecurity and data forensics consultants

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov