HackingHealthcareHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountHighContained

Healthcare Services Group, Inc.

bd_2ff23a494fd0eb29 · schema v1 · pii pii-v1

Severity

High

Discovered

Oct 7, 2024

Filed

Aug 25, 2025

To disclose

46 weeks

Affected

4,943state residents only

Linked

16 filings

Confidence

66%

Full breach record for Healthcare Services Group, Inc. →

Healthcare Services Group, Inc. (HSGI) notified the New Hampshire Attorney General of a data event affecting 4,943 NH residents. Unauthorized access occurred between Sept 27 and Oct 3, 2024; discovered Oct 7, 2024. Exposed data included names, SSNs, driver's licenses, and financial account info. HSGI secured systems, engaged law enforcement, notified regulators, and provided 12 months of Experian credit monitoring.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d46 weeks 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 · 46 weeks / 322 days

Sep 27, 2024

Begins

Oct 7, 2024

Discovered

Aug 25, 2025

Filed

vs. sector median

+34 wks slower

This filing is one of 16 about the same incident.View merged incident

A leak claim by underground about this victim predates this filing by 303 days.View originating leak claim

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Nebraska State AGbd_3d13d9954098db8f2025-08-25Verified
Oregon State AGbd_4999f3b28468b2fa2025-08-25Verified
Washington State AGbd_4e84de9fffe373992025-08-25Verified
Montana State AGbd_662a2f295d85c2662025-08-25Verified

Show 6 more filings ↓up to 8d gap

Vermont State AGbd_82a73cadd59014cd2025-08-25Verified
Delaware State AGbd_846def17f6a32ff92025-08-25Verified
Indiana State AGbd_e2af2ec1ac336df22025-08-25Verified
Texas State AGbd_3c672d9cc70092502025-08-26 · +1dVerified
South Carolina State AGbd_7ca401b90e6988952025-08-26 · +1dVerified
Rhode Island State AGbd_dc5f8588b13682f72025-09-02 · +8dVerified

Showing first 10 of 15 linked disclosures.

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: Healthcare Services Group, Inc.
norm: healthcare services
Domain: hcsgcorp.com
Industry: Healthcarellm

Discovered: Oct 7, 2024
Breach occurred: Sep 27, 2024 – Oct 3, 2024
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 25, 2025
Affected individuals: 4,943state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: Notified federal law enforcement regarding the eventProvided written notice of this incident to relevant state regulators, as necessary, and to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Initial access: valid_credentials

During the incident: Secured its computer systems
Began an investigation to determine the nature and scope of the activity
Undertook an extensive review of the involved files
Notified federal law enforcement regarding the event
Provided written notice to approximately four thousand nine hundred forty-three (4,943) New Hampshire residents
Provided access to credit monitoring services for twelve (12) months, through Experian, to individuals whose personal information was potentially affected by this incident, at no cost to these individuals
Provided impacted individuals with guidance on how to better protect against identity theft and fraud
Provided written notice of this incident to relevant state regulators, as necessary, and to the three major credit reporting agencies, Equifax, Experian, and TransUnion
Changes made: Working to implement additional safeguards and training to its employees
Reviewed and enhanced existing policies and procedures relating to data protection and security
Implemented additional security measures to mitigate risk associated with this event and to help prevent similar future incidents
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 46 weeks(322 days from discovery to filing)
Compliance flags: Leak >180d
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.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 11 states

View merged incident ↗

Nebraska State AGAug 25 · first

Oregon State AGAug 25 · first

Washington State AGAug 25 · first

Montana State AGAug 25 · first

Vermont State AGAug 25 · first

Delaware State AGAug 25 · first

Indiana State AGAug 25 · first

New Hampshire State AGAug 25 · first · this page

Texas State AG+1d

South Carolina State AG+1d

Rhode Island State AG+8d

Pattern: first filing Aug 25 (NE), last Sep 2 (RI) — a 8-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 15 — the full spread may be wider.

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/healthcare-services-group-20250825.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Aug 25, 2025
Raw hash: f8981eec2945238efddc96479835e344795165b42e9b1f64d9215b8d64789964

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityHealthcare Services Group, Inc.

Incidentdiscovered Oct 7, 2024

Stated responseSecured its computer systems

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov