HackingHealthcareHealthcareData ExfiltratedSupply Chain (3P Vendor)Customer Data InvolvedDelayed DiscoveryPHIIdentity (basic)LowContained

Allied Physicians of Michiana, LLC

bd_448c13cbecc71c95 · schema v1 · pii pii-v2

Severity

Low

Discovered

Dec 18, 2025

Filed

Oct 1, 2026

To disclose

—

Affected

17state residents only

Linked

2 filings

Confidence

68%

Full breach record for Allied Physicians of Michiana, LLC →2 incidents on file

Allied Physicians Group notified patients that its vendor, Aesto, LLC, experienced a network security incident. An unauthorized actor copied protected health information (PHI) and full names from Aesto's AWS infrastructure between December 2 and December 18, 2025. Aesto detected the incident on December 18, 2025, and confirmed the data exfiltration on May 26, 2026. The incident is contained. Allied Physicians Group is offering credit 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 2 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Vermont State AGbd_7faedd26b90866462026-10-08 · +7dCandidate

Name: Allied Physicians Group
norm: allied physicians group
Domain: aestohealth.com

Name: Allied Physicians of Michiana, LLC
norm: allied physicians of michiana
Industry: Healthcarellm

Discovered: Dec 18, 2025
Breach occurred: Dec 2, 2025 – Dec 18, 2025
Undetected for: 16 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 8, 2026
Affected individuals: 17state-resident count only
Data types: PHIIdentity (basic)
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1041 Exfiltration Over C2 Channel
Threat actor: External
Third party: via Aesto, LLC

During the incident: Commenced a prompt and thorough investigation
Worked closely with external cybersecurity professionals
Conducted extensive forensic investigation and manual document review
Offering complimentary Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services
Changes made: Continually evaluate and modify practices and internal controls to enhance security and privacy
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

Vermont State AG+7d

Pattern: first filing Oct 1 (MA), last Oct 8 (VT) — a 7-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/2026-1743-allied-physicians-group-pllc/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: f6bfeb83e1a16adb530af988a89fd92d0f2552d3143db1bb3a6d9dc85533c405

Linked disclosures

Regulatory filings (1) · sorted by filing gap

Reporting entityAllied Physicians Group

Victim entityAllied Physicians of Michiana, LLC

Incidentdiscovered Dec 18, 2025

Stated responseCommenced a prompt and thorough investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.mass.gov