MalwareFinancial ServicesTechnologyFinanceRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumContained

Landmark Admin

bd_6c3d805bd8b12544 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 13, 2024

Filed

Mar 24, 2025

To disclose

45 weeks

Affected

Not disclosed

Linked

2 filings

Confidence

66%

Full breach record for Landmark Admin →9 incidents on file

Landmark Admin, LLC, a third-party administrator for insurance carriers, disclosed a ransomware incident where data was encrypted and exfiltrated. Unauthorized access occurred between May 13 and June 17, 2024. Affected data included names, SSNs, and bank account details. Landmark engaged forensic investigators, notified law enforcement, and implemented extensive security hardening measures including MFA and new firewalls. Identity theft protection services were offered to affected individuals.

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Incident timeline

discovery → filing · 45 weeks / 315 days

May 13, 2024

Begins

May 13, 2024

Discovered

Mar 24, 2025

Filed

vs. sector median

+37 wks slower

This filing is one of 2 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (1) · sorted by filing gap

Illinois State AGbd_0a56c7825ce377bc2025-04-01 · +8dVerified

Name: Landmark Admin
norm: landmark admin

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

Discovered: May 13, 2024
Breach occurred: May 13, 2024 – Jun 17, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: Identity (basic)Government IDFinancial account
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
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
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)
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 45 weeks(315 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 2 filings · 2 states

View merged incident ↗

Idaho State AGMar 24 · first · this page

Illinois State AG+8d

Pattern: first filing Mar 24 (ID), last Apr 1 (IL) — a 8-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://www.ag.idaho.gov/content/uploads/2025/03/Landmark-Admin-LLC.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 24, 2025
Raw hash: bfb895ad49c946ae499d2d8dd826e520521b425c678f015924c599d441a49e06

Linked disclosures

Regulatory filings (1) · 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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancewww.ag.idaho.gov