HackingHealthcareHealthcareStolen CredentialsSupply Chain (3P Vendor)Data ExfiltratedCustomer Data InvolvedPHIIdentity (basic)Government IDMediumContained

Monroe County Health Center

bd_4bc50661730b54d2 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Aug 7, 2026

Filed

Sep 2, 2026

To disclose

26 days

Affected

1state residents only

Linked

2 filings

Confidence

69%

Full breach record for Monroe County Health Center →2 incidents on file

Monroe Health Center, a healthcare provider in West Virginia, notified the New Hampshire Attorney General on September 2, 2026, of a breach involving its third-party vendor, Aesto LLC. The incident, discovered on August 7, 2026, involved unauthorized access to Aesto's AWS infrastructure between December 2 and 18, 2025. One New Hampshire resident's PHI, including name and SSN, was potentially accessed. Aesto engaged GuidePoint Security for forensic investigation, contained the breach, and offered 24 months of Experian credit monitoring.

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Incident timeline

undetected · 248 days

discovery → filing · 26 days

Dec 2, 2025

Begins

Aug 7, 2026

Discovered

Sep 2, 2026

Filed

vs. sector median

9 wks faster

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Massachusetts State AGbd_3945750ec5f3621d2026-08-07 · +26dCandidate

Name: Monroe County Health Center
norm: monroe county health center

Name: Monroe County Health Center
norm: monroe county health center
Industry: Healthcarellm

Discovered: Aug 7, 2026
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 248 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 26, 2026
Affected individuals: 1state-resident count only
Data types: PHIIdentity (basic)Government ID
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1195 Supply Chain CompromiseT1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: Notified New Hampshire Department of Justice Office of the Attorney General
Third party: via Aesto LLC
Initial access: supply_chain

During the incident: Engaged GuidePoint Security, LLC to perform Incident Response services
Closed the security gaps exploited by the threat actor to gain access to the network
Deleted the impacted Lambda functions
Rotated all impacted AWS secrets
Deleted unauthorized files uploaded by the threat actor
Offered a complimentary 24 month membership of Experian
Changes made: Closed the security gaps exploited by the threat actor
Deleted the impacted Lambda functions
Rotated all impacted AWS secrets
Deleted unauthorized files uploaded by the threat actor
Continuing monitoring of the network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 days(26 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Massachusetts State AGAug 7 · first

New Hampshire State AG+26d · this page

Pattern: first filing Aug 7 (MA), last Sep 2 (NH) — a 26-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/monroe-health-center-20260902.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 2, 2026
Raw hash: edf6982226b9b030bd7d32da7e502a5f946a4e26551e8c9c95c0303adc98afa2

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityMonroe County Health Center

Victim entityMonroe County Health Center

Incidentdiscovered Aug 7, 2026

Stated responseEngaged GuidePoint Security, LLC to perform Incident Response services

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov