HackingHealthcareTechnologyHealthcareSupply Chain (3P Vendor)Business Associate (HIPAA)Customer Data InvolvedData ExfiltratedPHIIdentity (basic)Government IDHealth (basic)Financial accountMediumContained

AESTO, LLC

bd_c955e814f8445d26 · schema v1 · pii pii-v2

Severity

Medium

Discovered

Dec 18, 2025

Filed

Sep 8, 2026

To disclose

38 weeks

Affected

3state residents only

Linked

11 filings

Confidence

69%

Full breach record for AESTO, LLC →

Aesto LLC d/b/a Aesto Health, a healthcare data migration and archiving vendor, experienced a network security incident impacting its AWS infrastructure. Unauthorized access occurred between December 2 and December 18, 2025. Aesto detected the issue on December 18, 2025. Forensic investigation confirmed that protected health information, including names, addresses, dates of birth, medical record numbers, and Social Security numbers, may have been accessed or acquired. G.I. Medicine Associates, P.C., a covered entity client, notified approximately 3 New Hampshire residents. Aesto engaged cybersecurity experts, contained the incident, notified the FBI, and offered credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 16 days

discovery → filing · 38 weeks / 264 days

Dec 2, 2025

Begins

Dec 18, 2025

Discovered

Sep 8, 2026

Filed

vs. sector median

+25 wks slower

This filing is one of 11 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

New Hampshire State AGbd_d077b4854ef208412026-09-10 · +2dVerified
Massachusetts State AGbd_d39e08ca3ce7e1182026-09-01 · +7dVerified
New Hampshire State AGbd_64f64f39cb8a849a2026-08-28 · +11dVerified
New Hampshire State AGbd_4fe674ca1413cfc02026-08-27 · +12dVerified

Show 6 more filings ↓up to 39d gap

California State AGbd_65f70444b3fbe6f72026-08-24 · +15dVerified
New Hampshire State AGbd_b5839d18101d09ca2026-08-21 · +18dVerified
New Hampshire State AGbd_eac49aabb3a023ff2026-08-21 · +18dVerified
Illinois State AGbd_49a6928816a82c852026-08-01 · +38dCandidate
Illinois State AGbd_a10ec3898d9326e02026-08-01 · +38dVerified
HHS OCRbd_6054557cd914ee672026-07-31 · +39dCandidate

Name: G.I. Medicine Associates, P.C.
norm: gi medicine associates

Name: AESTO, LLC
norm: aesto
Domain: aestohealth.com
Also named: Aesto LLCdba oflegal entity
Aesto Healthdba oftrade name
Industry: HealthcarellmTechnologyllm

Discovered: Dec 18, 2025
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 8, 2026
Affected individuals: 3state-resident count only
Data types: PHIIdentity (basic)Government IDHealth (basic)Financial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified the FBIFiled notice with New Hampshire Attorney General
Third party: via Aesto LLC d/b/a Aesto Health

During the incident: Contained the incident immediately upon detecting unauthorized activity
Commenced a thorough investigation
Engaged leading cybersecurity experts to identify what personal information was involved
Notified the FBI of the incident on May 18, 2026
Notified Covered Entity clients whose patient information was included in the files potentially accessed or acquired
Posted notice of the incident on its website on June 24, 2026
Provided notice to major statewide media in New Hampshire on July 2, 2026
Mailing notice letters to affected New Hampshire residents on September 8, 2026
Changes made: Updating and strengthening passwords
Implementing new technical safeguards
Revising policies and procedures
Sanctioning workforce members involved in the incident
Offering complimentary access to Experian IdentityWorks for identity protection
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 38 weeks(264 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 5 states

View merged incident ↗

HHS OCRJul 31 · first

Illinois State AG+1d

New Hampshire State AG+21d

California State AG+24d

New Hampshire State AG+27d

New Hampshire State AG+28d

Massachusetts State AG+32d

New Hampshire State AG+39d · this page

New Hampshire State AG+41d

Pattern: first filing Jul 31 (AL), last Sep 10 (NH) — a 41-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/gi-medicine-associates-20260908.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 8, 2026
Raw hash: 6ebdc58a79c245695aff38d6d4fedea15aff191f9bb759a02054fa2b707947a3

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityG.I. Medicine Associates, P.C.

Victim entityAESTO, LLC

Incidentdiscovered Dec 18, 2025

Stated responseContained the incident immediately upon detecting unauthorized activity

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov