HackingHealthcareHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDMediumContained

Mariner Management Group

bd_e0873ed28661ec48 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Sep 9, 2023

Filed

Nov 20, 2023

To disclose

10 weeks

Affected

3state residents only

Linked

3 filings

Confidence

66%

Full breach record for Mariner Management Group →

Mariner Management Group, a nursing home, notified the NH AG of a cybersecurity incident discovered on Sept 9, 2023. Unauthorized actors accessed files on an impacted server. 3 NH residents were notified on Nov 15, 2023. Data likely included PII and government IDs. Mariner engaged forensic investigators, reset passwords, and offered credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 10 weeks / 72 days

Sep 9, 2023

Begins

Sep 9, 2023

Discovered

Nov 20, 2023

Filed

vs. sector median

2 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

Massachusetts State AGbd_b980c14ff2e4a2262023-11-15 · +5dVerified
HHS OCRbd_4cd85ab056f6499c2023-11-08 · +12dVerified

Name: Mariner Management Group
norm: mariner management

Name: Mariner Management Group
norm: mariner management
Industry: Healthcarellm

Discovered: Sep 9, 2023
Breach occurred: Sep 9, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Nov 15, 2023
Affected individuals: 3state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General
Initial access: valid_credentials

During the incident: Disconnected all access to the network
Engaged a specialized third-party cybersecurity firm to assist with securing the environment
Conducted a comprehensive forensic investigation
Enforced an organization wide password change
Strengthened password requirements
Implemented new technical safeguards
Enhanced the security measures
Informed our law firm
Began identifying the potentially affected individuals in preparation for notice
Offered 24 months of complimentary credit monitoring and identity theft restoration services through Transunion
Changes made: Enforced an organization wide password change
Strengthened password requirements
Implemented new technical safeguards
Enhanced the security measures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 10 weeks(72 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

HHS OCRNov 8 · first

Massachusetts State AG+7d

New Hampshire State AG+12d · this page

Pattern: first filing Nov 8 (OH), last Nov 20 (NH) — a 12-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/mariner-management-group-20231120.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 20, 2023
Raw hash: 6e9bd199606e0dcc23055bd9ae57c45845c0027395d27aa7e778161add82a711

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityMariner Management Group

Victim entityMariner Management Group

Incidentdiscovered Sep 9, 2023

Stated responseDisconnected all access to the network

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov