MalwareProfessional ServicesProfessional ServicesRansomwareData EncryptedData ExfiltratedCustomer Data InvolvedPIIIdentity (basic)Government IDMediumContained

Landmark Admin

bd_19c021424afbcfb2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 13, 2024

Filed

Apr 11, 2025

To disclose

48 weeks

Affected

Not disclosed

Linked

16 filings

Confidence

64%

Full breach record for Landmark Admin →9 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. The company detected suspicious activity on May 13, 2024, and engaged forensic investigators. Remediation included server hardening, MFA implementation, and staff training. Identity theft protection services are offered to affected individuals.

J jump to incidentP pin to compareR raw source

California clockDiscovered May 13, 2024 → Notified Jan 24, 2025256d ✗ CA 60-day late48 weeks discovery → filing

Incident timeline

discovery → filing · 48 weeks / 333 days

May 13, 2024

Begins

May 13, 2024

Discovered

Apr 11, 2025

Filed

vs. sector median

+29 wks slower

This filing is one of 16 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Maine State AGbd_473e2e2588c355282025-04-11Verified by operator
Washington State AGbd_9e8821db12aad8972025-04-11Verified by operator
New Hampshire State AGbd_83109b510e4ed7122024-10-28 · +165dVerified by operator
Oregon State AGbd_694502fe4f1453a62024-10-23 · +170dVerified

Show 6 more filings ↓up to 170d gap

Indiana State AGbd_6c7ccc9b72bce2702024-10-23 · +170dVerified
Maine State AGbd_73af656696be6b732024-10-23 · +170dCandidate
California State AGbd_af6fea4c2516a11a2024-10-23 · +170dVerified
Washington State AGbd_b9b1aa056e46bc9f2024-10-23 · +170dVerified
Delaware State AGbd_f2927f007bf0104d2024-10-23 · +170dVerified
Vermont State AGbd_fa4dac0cae950a092024-10-23 · +170dVerified

Showing first 10 of 15 linked disclosures.

Name: Landmark Admin
norm: landmark admin

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

Discovered: May 13, 2024
Breach occurred: May 13, 2024 – Jun 17, 2024
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 24, 2025
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Notified law enforcement

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
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 48 weeks(333 days from discovery to filing)
Compliance flags: CA 60-day late · 256d
Discovery-date grounding: letter-groundedThe discovery date is the detection date narrated in the notification letter — the defensible tier.
Clock breakdown: Statute Window Elapsed Threshold Status
California
Discovered: May 13, 2024
→ Notified: Jan 24, 2025
256d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: May 13, 2024 → Notified: Jan 24, 2025	256d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 8 states

View merged incident ↗

Oregon State AGOct 23 · first

Indiana State AGOct 23 · first

Maine State AGOct 23 · first

California State AGOct 23 · first

Washington State AGOct 23 · first

Delaware State AGOct 23 · first

Vermont State AGOct 23 · first

New Hampshire State AG+5d

Maine State AG+170d

Washington State AG+170d

California State AG+170d · this page

Pattern: first filing Oct 23 (OR), last Apr 11 (CA) — 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 15 — 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://oag.ca.gov/ecrime/databreach/reports/sb24-601278
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 11, 2025
Raw hash: 033df9e7d7ce382c69de8563f3ad8706f0e97324a352f24e0981cc9580b6a909

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

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov