HackingFinancial ServicesTechnologyFinanceStolen CredentialsRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedMulti-Stage ChainSupply Chain (3P Vendor)Identity (basic)Government IDFinancial accountHealth (basic)PHIHighContained

Landmark Admin

bd_1baf85090385207d · schema v1 · pii pii-v1

Severity

High

Discovered

May 13, 2024

Filed

Apr 10, 2025

To disclose

47 weeks

Affected

10,150state residents only

Confidence

66%

Full breach record for Landmark Admin →9 incidents on file

Landmark Admin, LLC, a third-party administrator for insurance carriers, reported a cybersecurity incident discovered on May 13, 2024. An unauthorized party accessed the network via valid credentials through a VPN, exfiltrated data, and encrypted systems. The incident affected 10,150 Iowa residents, compromising names, SSNs, driver's licenses, bank account numbers, and health information. Landmark engaged forensic investigators, notified law enforcement, enhanced security controls (MFA, firewalls, reimaging devices), and offered credit monitoring services.

J jump to incidentP pin to compareR raw source

Iowa clock✗ IA AG >5 bday47 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 47 weeks / 332 days

May 13, 2024

Begins

May 13, 2024

Discovered

Apr 10, 2025

Filed

vs. sector median

+39 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed10,150 affectedView incident

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: Oct 23, 2024
Affected individuals: 10,150state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)PHI
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1190 Exploit Public-Facing ApplicationT1041 Exfiltration Over C2 ChannelT1486 Data Encrypted for Impact
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, as well as to conduct 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)
Offered credit monitoring and identity theft protection services through IDX, A ZeroFox Company
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 47 weeks(332 days from discovery to filing)
Compliance flags: IA AG >5 bday
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

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://www.iowaattorneygeneral.gov/media/cms/4102025_Landmark_Admin_LLC_suppleme_B515EA63C5FED.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 10, 2025
Raw hash: 4c5c08164b342ee3fa90b143805cc4534cb54cc3d50faafb5772d1231e39a224

Reporting entityLandmark Admin

Victim entityLandmark Admin

Incidentdiscovered May 13, 2024

Stated responseDisconnected the affected systems and remote access to the network

ComplianceIA AG >5 bday

Extraction provenanceno artifact recorded

Source provenancewww.iowaattorneygeneral.gov