MalwareEducationEducationRansomwareData EncryptedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)PIILowContained

Hacienda La Puente Unified School District

bd_40af77a4100bceab · schema v1 · pii pii-v1

Severity

Low

Discovered

Apr 12, 2024

Filed

Sep 17, 2025

To disclose

17 months

Affected

Not disclosed

Linked

7 filings

Confidence

65%

Full breach record for Hacienda La Puente Unified School District →2 incidents on file

Hacienda La Puente Unified School District experienced a ransomware attack. Unauthorized access occurred from February 9, 2024, to April 12, 2024. The incident was discovered on April 12, 2024. The district engaged third-party forensic specialists, secured the network, and reported the incident to federal law enforcement and the California Cybersecurity Integration Center. Affected individuals may have had their names and other personal information exposed. The district is offering complimentary credit monitoring services.

J jump to incidentP pin to compareR raw source

California clockDiscovered Apr 12, 2024 → Notified Aug 15, 2025490d ✗ CA 60-day late17 months discovery → filing

Incident timeline

undetected · 63 days

discovery → filing · 17 months / 523 days

Feb 9, 2024

Begins

Apr 12, 2024

Discovered

Sep 17, 2025

Filed

vs. sector median

+66 wks slower

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

New Hampshire State AGbd_1d319057400a676a2025-09-02 · +15dVerified
Vermont State AGbd_dc6c623cdafb506c2025-08-29 · +19dVerified
Nebraska State AGbd_87470dac93757c552025-08-15 · +33dVerified
Massachusetts State AGbd_d6b08be6254c72d52025-07-04 · +75dVerified

Show 2 more filings ↓up to 76d gap

California State AGbd_08d378f872532da32025-07-03 · +76dCandidate
Indiana State AGbd_a23ed27bd81cbd0a2025-07-03 · +76dVerified

Name: Hacienda La Puente Unified School District
norm: hacienda la puente unified school district
Domain: hlpschools.org

Name: Hacienda La Puente Unified School District
norm: hacienda la puente unified school district
Domain: hlpschools.org
Industry: Educationllm

Discovered: Apr 12, 2024
Breach occurred: Feb 9, 2024 – Apr 12, 2024
Undetected for: 63 daysoccurrence → discovery
Materiality determined: —
Notification sent: Aug 15, 2025
Affected individuals: Not disclosed
Data types: Identity (basic)PII
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: ExternalFinancial
Regulator citations: Reported this incident to federal law enforcement and the California Cybersecurity Integration Center

During the incident: Immediately began working with our I.T. team and third-party forensic specialists to secure the network
Restore our systems to operability
Investigate the full scope and nature of the incident
Reported this incident to federal law enforcement and the California Cybersecurity Integration Center
Engaged third-party forensic specialists to investigate the full scope and nature of this incident
Arranged for you to activate, at no cost to you, credit monitoring services for 12/24 months provided by IDX
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 months(523 days from discovery to filing)
Compliance flags: CA 60-day late · 490d
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: Apr 12, 2024
→ Notified: Aug 15, 2025
490d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Apr 12, 2024 → Notified: Aug 15, 2025	490d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 6 states

View merged incident ↗

California State AGJul 3 · first

Indiana State AGJul 3 · first

Massachusetts State AG+1d

Nebraska State AG+43d

Vermont State AG+57d

New Hampshire State AG+61d

California State AG+76d · this page

Pattern: first filing Jul 3 (CA), last Sep 17 (CA) — a 76-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://oag.ca.gov/ecrime/databreach/reports/sb24-610217
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 17, 2025
Raw hash: 4202b67c66f28eb551f159a12b344f79bf73f41dd86e004f983acfb10713c5d3

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityHacienda La Puente Unified School District

Victim entityHacienda La Puente Unified School District

Incidentdiscovered Apr 12, 2024

Stated responseImmediately began working with our I.T. team and third-party forensic specialists to secure the network

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov