MalwareFinancial ServicesFinanceRansomwareStolen CredentialsData EncryptedData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHealth (basic)MediumContained

Landmark Admin

bd_fa4dac0cae950a09 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 13, 2024

Filed

Oct 23, 2024

To disclose

23 weeks

Affected

Not disclosed

Linked

23 filings

Confidence

66%

Full breach record for Landmark Admin →5 incidents on file

Landmark Admin, LLC, a third-party administrator for insurance carriers, experienced a data breach from May 13 to June 17, 2024. Unauthorized access resulted in data encryption and exfiltration. Affected data includes names, tax ID numbers, and for some, driver's license, passport, and health information. The company engaged forensic investigators, contained the incident, and implemented extensive remediation measures including MFA and server hardening. Identity theft protection is offered to affected individuals.

J jump to incidentP pin to compareR raw source

Vermont clock✗ VT AG >45 bday23 weeks discovery → filing

Incident timeline

discovery → filing · 23 weeks / 163 days

May 13, 2024

Begins

May 13, 2024

Discovered

Oct 23, 2024

Filed

vs. sector median

+15 wks slower

This filing is one of 23 filings about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Oregon State AGbd_694502fe4f1453a62024-10-23Verified
Indiana State AGbd_6c7ccc9b72bce2702024-10-23Verified
South Carolina State AGbd_6840a4269b9261ba2024-10-24 · +1dVerified by operator
New Hampshire State AGbd_83109b510e4ed7122024-10-28 · +5dVerified by operator

Show 6 more filings ↓up to 170d gap

Idaho State AGbd_6c3d805bd8b125442025-03-24 · +152dVerified by operator
Illinois State AGbd_0a56c7825ce377bc2025-04-01 · +160dVerified by operator
Iowa State AGbd_1baf85090385207d2025-04-10 · +169dVerified by operator
California State AGbd_19c021424afbcfb22025-04-11 · +170dVerified by operator
Maine State AGbd_473e2e2588c355282025-04-11 · +170dVerified by operator
Washington State AGbd_9e8821db12aad8972025-04-11 · +170dVerified by operator

Showing first 10 of 22 linked disclosures.

Name: Landmark Admin
norm: landmark admin

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: Not disclosed
Data types: Identity (basic)Government IDHealth (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified law enforcement of this incident

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
Conducted a comprehensive forensic investigation to determine the nature and scope of the incident
Notified law enforcement of this incident
Offering identity theft protection services through IDX
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)
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 23 weeks(163 days from discovery to filing)
Compliance flags: VT AG >45 bday
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.

Filing propagation · 11 filings · 11 states

View merged incident ↗

Oregon State AGOct 23 · first

Indiana State AGOct 23 · first

Vermont State AGOct 23 · first · this page

South Carolina State AG+1d

New Hampshire State AG+5d

Idaho State AG+152d

Illinois State AG+160d

Iowa State AG+169d

California State AG+170d

Maine State AG+170d

Washington State AG+170d

Pattern: first filing Oct 23 (OR), last Apr 11 (WA) — a 170-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 22 — 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://ago.vermont.gov/document/2024-10-23-landmark-admin-data-breach-notice-consumers
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Oct 23, 2024
Raw hash: 9bb882013f9d9410c92832aae008cbf021411ed1ba4d6f18a9a1f3a93164f1eb

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityLandmark Admin

Victim entityLandmark Admin

Incidentdiscovered May 13, 2024

Stated responseDisconnected the affected systems and remote access to the network

ComplianceVT AG >45 bday

Extraction provenanceno artifact recorded

Source provenanceago.vermont.gov