HackingProfessional ServicesProfessional ServicesDelayed DiscoveryIdentity (basic)PIILowContained

Horne LLP

bd_7076ca2ed6fa4313 · schema v1 · pii pii-v1

Severity

Low

Discovered

Dec 1, 2021

Filed

Jan 25, 2024

To disclose

26 months

Affected

1state residents only

Linked

3 filings

Confidence

64%

Full breach record for Horne LLP →3 incidents on file

HORNE, LLP notified individuals of unauthorized network access occurring Dec 8-13, 2021. Suspicious activity was first detected in Dec 2021. The breach may have exposed names and variable personal data. HORNE engaged law enforcement, offered credit monitoring, and implemented additional security measures. Notification sent Jan 23, 2024.

J jump to incidentP pin to compareR raw source

Incident timeline

Dec 8, 2021

Begins

Jan 25, 2024

Filed

vs. sector median

+93 wks slower

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

HHS OCRbd_87253b14e5fea1462024-01-13 · +12dVerified
Illinois State AGbd_ef80c8ebf24667132024-01-01 · +24dCandidate

Name: Horne LLP
norm: horne

Name: Horne LLP
norm: horne
Industry: Professional Servicesllm

Discovered: Dec 1, 2021
Breach occurred: Dec 8, 2021 – Dec 13, 2021
Materiality determined: —
Notification sent: Jan 23, 2024
Affected individuals: 1state-resident count only
Data types: Identity (basic)PII
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid Accounts
Threat actor: External
Regulator citations: reported this incident to law enforcement and regulators
Initial access: valid_credentials

During the incident: Immediately took steps to secure our environment
Launched an investigation
Conducted an extensive review of the contents of the impacted systems
Reported this incident to law enforcement and regulators
Offering you immediate access to complimentary credit monitoring and identity theft protection services
Changes made: Reviewing existing security policies
Implemented additional measures to further protect against similar incidents moving forward
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 26 months(785 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 3 states

View merged incident ↗

Illinois State AGJan 1 · first

HHS OCR+12d

Montana State AG+24d · this page

Pattern: first filing Jan 1 (IL), last Jan 25 (MT) — a 24-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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1054.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jan 25, 2024
Raw hash: f26b44c241dcc9ddcbf240784c939ca745aaea47670c8aeb30593b3ab85f1013

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityHorne LLP

Victim entityHorne LLP

Incidentdiscovered Dec 1, 2021

Stated responseImmediately took steps to secure our environment

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov