MalwareEducationEducationRansomwareData EncryptedEmployee Data InvolvedCustomer Data InvolvedPIIIdentity (basic)EmploymentEducationMinorMediumContained

San Dieguito Union High School District

bd_0af03ee62b320e85 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 6, 2023

Filed

Jun 20, 2024

To disclose

32 weeks

Affected

Not disclosed

Confidence

65%

Full breach record for San Dieguito Union High School District →4 incidents on file

Escondido Union High School District experienced a malware incident between November 3-5, 2023, discovered on November 6, 2023. The malware prevented access to certain files (encryption). An unauthorized actor accessed systems containing information on employees, dependents, and students. No evidence of misuse was found. The district secured systems, notified law enforcement, and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

California clockDiscovered Nov 6, 2023 → Notified Jun 20, 2024227d ✗ CA 60-day late32 weeks discovery → filing

Incident timeline

undetected · 3 days

discovery → filing · 32 weeks / 227 days

Nov 3, 2023

Begins

Nov 6, 2023

Discovered

Jun 20, 2024

Filed

vs. sector median

+25 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.ConfirmedView incident

Name: San Dieguito Union High School District
norm: san dieguito union high school district
Domain: sduhsd.net

Name: San Dieguito Union High School District
norm: san dieguito union high school district
Domain: sduhsd.net
Industry: Educationllm

Discovered: Nov 6, 2023
Breach occurred: Nov 3, 2023 – Nov 5, 2023
Undetected for: 3 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 20, 2024
Affected individuals: Not disclosed
Data types: PIIIdentity (basic)EmploymentEducationMinor
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for Impact
Threat actor: External
Regulator citations: Notified applicable regulatory authorities, as required by law

During the incident: Took steps to secure its environment
Launched an investigation to determine the nature and scope of the activity
Confirmed the security of our systems
Reviewed the contents of relevant data for sensitive information
Notified impacted individuals associated with that sensitive information
Notified law enforcement and are cooperating with its investigation
Offering 12 months of complimentary access to credit monitoring services through Cyberscout
Changes made: Reviewing our policies, procedures and processes related to the storage and access of personal information to reduce the likelihood of a similar future event
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 32 weeks(227 days from discovery to filing)
Compliance flags: CA 60-day late · 227d
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: Nov 6, 2023
→ Notified: Jun 20, 2024
227d 60 days (analyst band, pre-2026 discoveries) CA 60-day late

Statute	Window	Elapsed	Threshold	Status
California	Discovered: Nov 6, 2023 → Notified: Jun 20, 2024	227d	60 days (analyst band, pre-2026 discoveries)	CA 60-day late

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://oag.ca.gov/ecrime/databreach/reports/sb24-587231
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Jun 20, 2024
Raw hash: d9c03dcc836174e21a3a13ae3f11113dda6329cc980e4dda99779bc2c5cba01f

Reporting entitySan Dieguito Union High School District

Victim entitySan Dieguito Union High School District

Incidentdiscovered Nov 6, 2023

Stated responseTook steps to secure its environment

ComplianceCA 60-day late

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov