MalwareFinancial ServicesFinanceRansomwareStolen CredentialsData ExfiltratedData EncryptedCustomer Data InvolvedMulti-Stage ChainSupply Chain (3P Vendor)Identity (basic)Government IDFinancial accountHealth (basic)PHIHighContained

Landmark Admin

bd_a8d46b90940d2961 · schema v1 · pii pii-v1

Severity

High

Discovered

May 13, 2024

Filed

Apr 22, 2025

To disclose

49 weeks

Affected

1,471state residents only

Confidence

66%

Full breach record for Landmark Admin →9 incidents on file

Landmark Admin, LLC, a third-party administrator for insurance carriers, notified the Rhode Island Attorney General of a cybersecurity incident discovered in May 2024. The breach involved unauthorized access via valid credentials through a VPN, followed by data encryption and exfiltration. Approximately 1,471 Rhode Island residents were potentially affected, with data including names, SSNs, driver's licenses, bank account numbers, and health information. Landmark engaged forensic investigators, notified law enforcement, and offered credit monitoring services.

J jump to incidentP pin to compareR raw source

Rhode Island clock✗ RI AG >45d49 weeks discovery → filing

Incident timeline

discovery → filing · 49 weeks / 344 days

May 13, 2024

Begins

May 13, 2024

Discovered

Apr 22, 2025

Filed

vs. sector median

+41 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1,471 affectedView incident

Name: Wilson, Elser, Moskowitz, Edelman & Dicker LLP
norm: wilson elser moskowitz edelman dicker
Domain: wilsonelser.com

Name: Landmark Admin
norm: landmark admin
Industry: Financial Servicesllm

Discovered: May 13, 2024
Breach occurred: May 13, 2024 – Jun 17, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Oct 23, 2024
Affected individuals: 1,471state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)PHI
Data elements: Social Security numberDate of birth
Attack vector: Unauthorized Access
MITRE ATT&CK: T1190 Exploit Public-Facing ApplicationT1078 Valid AccountsT1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified law enforcement of this incident
Initial access: valid_credentials

During the incident: Disconnected the affected systems and remote access to the network
Engaged a specialized third-party cybersecurity firm and IT personnel to assist with securing the environment, remediation and recovery, live forensics
Conducted a comprehensive forensic investigation
Notified the insurance carriers which it acted as a third-party administrator whose data was impacted
Changed the account passcodes
Reinstated its network and remote access
Coordinated with each of the insurance carriers to notify the potentially affected individuals for whom it had valid addresses via U.S. first class mail on a rolling basis
Posted substitute notice of this incident on its website
Publishing media notice in the Houston Chronicle on June 12, 2024
Posted an updated substitute notice on its website and submitted a Media Release to PRNewswire for nationwide distribution
Notified law enforcement of this incident
Changes made: Acquired servers and deployed after server hardening
Deployed a new firewall with the latest firmware
Obtained new external IP address assigned by a new Internet Service Provider
Implemented new domain controllers with new account naming conventions and forced new passwords
Enabled BitLocker on all hard drives
Reimaged all printers on the network
Reimaged all network switches and updated to the latest firmware
Reimaged and updated all IoT devices with the latest firmware
Provided additional security training for all staff members
Restricted all points of access to its systems
Engaged a managed service provider to supplement the existing strong security posture with additional monitoring and protection software
Requires multifactor authentication for all devices (for both user and administrator logins)
Built a new system that was totally disconnected from the prior system
Set up surveillance and Landmark’s IT vendor monitored on the new system from its inception
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 49 weeks(344 days from discovery to filing)
Compliance flags: RI AG >45d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.

Status: No extraction artifact recorded for this disclosure.

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://riag.ri.gov/media/7466/download
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 22, 2025
Raw hash: 97c50ca232fccb35df71b84b591d0cd85d9a13a2405863a57cd0573e35aa0d69

Reporting entityWilson, Elser, Moskowitz, Edelman & Dicker LLP

Victim entityLandmark Admin

Incidentdiscovered May 13, 2024

Stated responseDisconnected the affected systems and remote access to the network

ComplianceRI AG >45d

Extraction provenanceno artifact recorded

Source provenanceriag.ri.gov