HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumActive

Aroostook Mental Health Center

bd_0ea1c3092b0ac7ff · schema v1 · pii pii-v1

Severity

Medium

Discovered

Mar 21, 2026

Filed

Apr 11, 2026

To disclose

21 days

Affected

Not disclosed

Linked

4 filings

Confidence

65%

Full breach record for Aroostook Mental Health Center →

Aroostook Mental Health Center reported an external system breach (hacking) occurring March 11-12, 2026, discovered March 21, 2026. Unauthorized access resulted in the exfiltration of files containing personal information, including names and government identifiers (SSN). The total number of affected individuals is undetermined. AMHC engaged specialists, secured its network, reported to federal law enforcement, and will offer 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Mar 21, 2026 → Notified Jun 1, 202672d ⏱ ME resident >60d21 days discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 10 days

discovery → filing · 21 days

Mar 11, 2026

Begins

Mar 21, 2026

Discovered

Apr 11, 2026

Filed

vs. sector median

9 wks faster

This filing is one of 4 about the same incident.View merged incident

A leak claim by qilin about this victim predates this filing by 31 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Siteqilinbd_a01d8fd05ecc346b2026-03-24 · +17dVerified
Leak Siteqilinbd_4e10ba0812ad0f812026-03-11 · +31dVerified

Regulatory filings (1) · sorted by filing gap

HHS OCRbd_5df8883588d5ce202026-05-05 · +24dVerified

Name: Kennedys CMK LLP
norm: kennedys cmk

Name: Aroostook Mental Health Center
norm: aroostook mental health center
Domain: amhc.org
Industry: Healthcarellm

Discovered: Mar 21, 2026
Breach occurred: Mar 11, 2026 – Mar 12, 2026
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 1, 2026
Affected individuals: Not disclosed
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: reported to its primary federal and state regulators
Initial access: exploit_public_facing

During the incident: Took immediate action to secure its network
Partnered with specialists to restore its systems and investigate the impact
Reported this event to federal law enforcement
Changes made: Implemented enhancements to its existing technical security controls
Reviewing and updating its security and privacy policies
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 days(21 days from discovery to filing)
Compliance flags: ME resident >60d · 72dLeak >30dME AG ≤30d · 21d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Mar 21, 2026
→ Notified: Jun 1, 2026
72d 60 days (analyst band; statutory cap is 30 days) ME resident >60d
Maine
Discovered: Mar 21, 2026
→ Filed with AG: Apr 11, 2026
21d 30 days ME AG ≤30d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Mar 21, 2026 → Notified: Jun 1, 2026	72d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d
Maine	Discovered: Mar 21, 2026 → Filed with AG: Apr 11, 2026	21d	30 days	ME AG ≤30d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings

View merged incident ↗

Maine State AGApr 11 · first · this page

HHS OCR+24d

Pattern: first filing Apr 11 (ME), last May 5 (ME) — a 24-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.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/f7b052a7-e041-42bf-a678-ed6af1ff9e32.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 11, 2026
Raw hash: db61680723fcffce05f040e8aa596c6200d3026b23b56f32c421bde15db533b2

Linked disclosures

Ransomware claims (2)

Regulatory filings (1) · sorted by filing gap

Reporting entityKennedys CMK LLP

Victim entityAroostook Mental Health Center

Incidentdiscovered Mar 21, 2026

Stated responseTook immediate action to secure its network

ComplianceME resident >60d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov