HackingHealthcareHealthcareData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)PHICriticalContained

HOSPITAL SISTERS HEALTH SYSTEM

bd_8dc5bdc41b329c97 · schema v1 · pii pii-v1

Severity

Critical

Discovered

Aug 27, 2023

Filed

Feb 6, 2025

To disclose

18 months

Affected · nationwide

882,78279 in this filing

Linked

4 filings

Confidence

64%

Full breach record for HOSPITAL SISTERS HEALTH SYSTEM →14 incidents on file

Hospital Sisters Health System (HSHS) disclosed an external system breach (hacking) occurring between August 16 and August 27, 2023, discovered on August 27, 2023. The incident affected 882,782 individuals, including 79 Maine residents. Compromised data included names, addresses, DOBs, medical record numbers, limited treatment info, health insurance info, SSNs, and driver's license numbers. HSHS engaged forensic investigators, notified law enforcement, and offered 12 months of Equifax Credit Watch Gold. Notification was sent on August 30, 2024.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Aug 27, 2023 → Filed with AG Feb 6, 2025529d ✗ ME AG >90d18 months discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 11 days

discovery → filing · 18 months / 529 days

Aug 16, 2023

Begins

Aug 27, 2023

Discovered

Feb 6, 2025

Filed

vs. sector median

+63 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

California State AGbd_63d403f97d8c8da82025-02-06Verified
Washington State AGbd_8324213e82150fab2025-02-06Candidate
New Hampshire State AGbd_72355d0affccd4a02025-02-07 · +1dVerified

Name: HOSPITAL SISTERS HEALTH SYSTEM
norm: hospital sisters health system

Name: HOSPITAL SISTERS HEALTH SYSTEM
norm: hospital sisters health system
Industry: Healthcarellm

Discovered: Aug 27, 2023
Breach occurred: Aug 16, 2023 – Aug 27, 2023
Undetected for: 11 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 30, 2024
Affected individuals: 882,782state + nationwide
Data types: Identity (basic)Government IDHealth (basic)PHI
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing Application
Threat actor: External
Regulator citations: reported the incident to law enforcement
Initial access: exploit_public_facing

During the incident: Took steps to contain and remediate the incident
Launched an internal investigation
Reported the incident to law enforcement
Engaged a leading forensic security firm to assist in our investigation and confirm the security of our computer systems and network
Changes made: Enhancing our technical security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 months(529 days from discovery to filing)
Compliance flags: ME AG >90d · 529dME resident >180d · 369d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Aug 27, 2023
→ Filed with AG: Feb 6, 2025
529d 90 days ME AG >90d
Maine
Discovered: Aug 27, 2023
→ Notified: Aug 30, 2024
369d 180 days ME resident >180d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Aug 27, 2023 → Filed with AG: Feb 6, 2025	529d	90 days	ME AG >90d
Maine	Discovered: Aug 27, 2023 → Notified: Aug 30, 2024	369d	180 days	ME resident >180d

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

California State AGFeb 6 · first

Washington State AGFeb 6 · first

Maine State AGFeb 6 · first · this page

New Hampshire State AG+1d

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-a1252b4f8318/2bf19926-e137-4a41-9773-5429f08343ec.html
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 6, 2025
Raw hash: ff1febbc78322c0e199efdfd8090579c4c5fbeb74583c6757be59f27bcd73a37

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHOSPITAL SISTERS HEALTH SYSTEM

Victim entityHOSPITAL SISTERS HEALTH SYSTEM

Incidentdiscovered Aug 27, 2023

Stated responseTook steps to contain and remediate the incident

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov