MalwareProfessional ServicesProfessional ServicesRansomwareRansom DemandedRansom PaidData ExfiltratedCustomer Data InvolvedIdentity (basic)Government IDHighContained

Horizon Actuarial

bd_7b64133079795f2e · schema v1 · pii pii-v1

Severity

High

Discovered

Nov 12, 2021

Filed

Mar 22, 2022

To disclose

19 weeks

Affected

19,245state residents only

Linked

42 filings

Confidence

65%

Full breach record for Horizon Actuarial →10 incidents on file

Horizon Actuarial Services LLC notified Montana residents of a data breach occurring Nov 10-11, 2021. External actors accessed servers and exfiltrated personal data including names, SSNs, and DOBs. The company paid a ransom to the attackers. Notifications were mailed starting Jan 13, 2022, offering 12 months of Kroll identity monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 2 days

discovery → filing · 19 weeks / 130 days

Nov 10, 2021

Begins

Nov 12, 2021

Discovered

Mar 22, 2022

Filed

vs. sector median

+1 wks slower

This filing is one of 42 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

California State AGbd_15610822e41f867e2022-05-10 · +49dVerified by operator
New Hampshire State AGbd_3140d98441aff7d22022-05-17 · +56dVerified by operator
California State AGbd_3343e2ff6ac461772022-05-18 · +57dVerified by operator
California State AGbd_0b8a8d1e0b2eb75a2022-05-24 · +63dVerified by operator

Show 6 more filings ↓up to 83d gap

Maine State AGbd_63ec2cad1130c87c2022-05-24 · +63dVerified
Hawaii State AGbd_a9ca9bbf0b626c3f2022-05-24 · +63dVerified by operator
New Hampshire State AGbd_797f45774e6898b62022-05-31 · +70dVerified by operator
Maine State AGbd_23ebf680da220cfe2022-06-09 · +79dVerified by operator
California State AGbd_531852585f7aeb412022-06-09 · +79dVerified by operator
New Hampshire State AGbd_a2e88f733f86ef672022-06-13 · +83dVerified by operator

Showing first 10 of 41 linked disclosures.

Name: Horizon Actuarial
norm: horizon actuarial
Domain: horizonactuarial.com

Name: Horizon Actuarial
norm: horizon actuarial
Domain: horizonactuarial.com
Industry: Professional Servicesllm

Discovered: Nov 12, 2021
Breach occurred: Nov 10, 2021 – Nov 11, 2021
Undetected for: 2 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jan 13, 2022
Affected individuals: 19,245state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Provided notice to the FBI

During the incident: Initiated efforts to secure its computer servers
Launched an investigation into the legitimacy of the claims
Provided notice to the FBI
Negotiated with and paid the group in exchange for an agreement that they would delete and not distribute or otherwise misuse the stolen information
Began mailing letters to individuals associated with benefit plans
Changes made: Reviewing its existing security policies
Implemented additional measures to further protect against similar incidents moving forward
Arranged for identity monitoring services for 12 months provided by Kroll
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 19 weeks(130 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 5 states

View merged incident ↗

Montana State AGMar 22 · first · this page

California State AG+49d

New Hampshire State AG+56d

California State AG+57d

California State AG+63d

Maine State AG+63d

Hawaii State AG+63d

New Hampshire State AG+70d

Maine State AG+79d

California State AG+79d

New Hampshire State AG+83d

Pattern: first filing Mar 22 (MT), last Jun 13 (NH) — a 83-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 41 — 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://dojmt.gov/wp-content/uploads/OCP/Consumer-Notification-40.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 22, 2022
Raw hash: 9aad81c1df34e305b6985292cff1787f902486449f52c8bf492b61bd03763668

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityHorizon Actuarial

Victim entityHorizon Actuarial

Incidentdiscovered Nov 12, 2021

Stated responseInitiated efforts to secure its computer servers

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov