HackingHealthcareHealthcareSupply Chain (3P Vendor)Business Associate (HIPAA)Customer Data InvolvedEmployee Data InvolvedPHIHealth (basic)Government IDIdentity (basic)Financial accountMinorMediumContained

Graham County Hospital

bd_e66b24c3665614af · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 18, 2025

Filed

Oct 1, 2026

To disclose

—

Affected

47state residents only

Linked

6 filings

Confidence

68%

Full breach record for Graham County Hospital →

Aesto, LLC, a healthcare data migration and archiving vendor, 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 (PHI) of individuals affiliated with Graham County Hospital, including minors, may have been accessed. Data types included names, dates of birth, medical information, driver's license numbers, financial account numbers, health insurance information, ITINs, and SSNs. Aesto engaged external cybersecurity professionals, secured the network, reset credentials, and deleted impacted Lambda functions. Graham County Hospital is offering cyber monitoring services to affected individuals.

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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 6 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (5) · sorted by filing gap

Indiana State AGbd_e67d6baea475da3d2026-09-14 · +17dVerified
New Hampshire State AGbd_6f94ad8afcd0294b2026-09-11 · +20dVerified
Massachusetts State AGbd_05527c3477a7fbe12026-09-01 · +30dVerified
Massachusetts State AGbd_552342ca92f193182026-09-01 · +30dCandidate

Show 1 more filing ↓up to 30d gap

Massachusetts State AGbd_f55f656ee8aa51412026-09-01 · +30dCandidate

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

Name: Graham County Hospital
norm: graham county hospital
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: 47state-resident count only
Data types: PHIHealth (basic)Government IDIdentity (basic)Financial accountMinor
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
Secured our network
Reset credentials
Enhanced our security measures and monitoring tools
Reviewing our existing policies and training protocols
Providing an attestation from our cybersecurity professionals detailing the root cause of the incident
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 our existing policies and training protocols to help prevent similar incidents in the future
Continually evaluate and strengthen our practices and internal controls
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 · 6 filings · 3 states

View merged incident ↗

Massachusetts State AGSep 1 · first

New Hampshire State AG+10d

Indiana State AG+13d

Massachusetts State AG+30d · this page

Pattern: first filing Sep 1 (MA), last Oct 1 (MA) — a 30-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/2026-1710-marana-health-center/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: 77c65d37a38763d3e933cb0e7a0108ae44fae9c3a23583921d93b634fa347656

Linked disclosures

Regulatory filings (5) · sorted by filing gap

Reporting entityAesto Health

Victim entityGraham County Hospital

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