HackingHealthcareHealthcareData ExfiltratedBusiness Associate (HIPAA)Customer Data InvolvedDelayed DiscoveryPHIHealth (basic)Identity (basic)Government IDFinancial accountMediumContained

Settlement Health and Medical

bd_aff2463babcc71f2 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 18, 2025

Filed

Oct 1, 2026

To disclose

—

Affected

17state residents only

Linked

2 filings

Confidence

67%

Full breach record for Settlement Health and Medical →

Aesto, LLC, a healthcare data migration and archiving service provider, experienced a cyber incident affecting its AWS infrastructure. Unauthorized access occurred between December 2 and December 18, 2025, and was discovered on December 18, 2025. Protected health information, including names, dates of birth, medical information, driver's license numbers, financial account numbers, health insurance information, ITINs, and Social Security numbers, may have been accessed or acquired. Aesto notified covered entities, including Settlement Health and Medical, on June 26, 2026. The incident has been contained, and Aesto has implemented remediation measures including closing security gaps, deleting impacted Lambda functions, and rotating AWS secrets.

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Incident timeline

undetected · 16 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Oct 1, 2026

Filed

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

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

New Hampshire State AGbd_4dc59cae5d8be8212026-10-14 · +13dVerified

Name: Aesto Health
norm: aesto health
Domain: aestohealth.com

Name: Settlement Health and Medical
norm: settlement health and medical
Industry: Healthcarellm

Discovered: Dec 18, 2025
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 26, 2026
Affected individuals: 17state-resident count only
Data types: PHIHealth (basic)Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Offering to notify HHS OCR on behalf of covered entities if they opt-in
Third party: via Aesto, LLC

During the incident: Launched a thorough investigation with experienced external cybersecurity professionals
Worked with cybersecurity professionals to secure our network
Reset credentials
Enhanced security measures and monitoring tools
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
Changes made: Reviewing existing policies and training protocols to help prevent similar incidents in the future
Continually evaluate and strengthen practices and internal controls
Providing an attestation from cybersecurity professionals detailing the root cause and remediation steps
Source: Quoted from the filing itself, not independently verified.

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 AGOct 1 · first · this page

New Hampshire State AG+13d

Pattern: first filing Oct 1 (MA), last Oct 14 (NH) — a 13-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://www.mass.gov/doc/2026-1805-settlement-health-and-medical/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 1, 2026
Raw hash: 7ace245146b8150e030d9c22556164a0e06eb2815594cc25a9c837f079c31eb4

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityAesto Health

Victim entitySettlement Health and Medical

Incidentdiscovered Dec 18, 2025

Stated responseLaunched a thorough investigation with experienced external cybersecurity professionals

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov