HackingEducationEducationStolen CredentialsCapture Stored DataData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDMediumContained

Great Valley School District

bd_3784ca3dba2c993b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 10, 2023

Filed

Dec 19, 2023

To disclose

6 weeks

Affected

2state residents only

Linked

4 filings

Confidence

65%

Full breach record for Great Valley School District →

Great Valley School District notified New Hampshire residents of unauthorized access to systems between Oct 31 and Nov 10, 2023. The incident involved an unauthorized actor gaining access to personal information, potentially including SSNs and names. Great Valley engaged third-party cybersecurity specialists, notified law enforcement, and offered Equifax credit monitoring to affected individuals.

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Incident timeline

undetected · 10 days

discovery → filing · 6 weeks / 39 days

Oct 31, 2023

Begins

Nov 10, 2023

Discovered

Dec 19, 2023

Filed

vs. sector median

3 wks faster

This filing is one of 4 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitemedusabd_5cd3a6189dd59c622023-11-29 · +20dVerified by operator

Regulatory filings (2) · sorted by filing gap

Vermont State AGbd_1b4d9147832b5c5f2023-12-19Candidate
Massachusetts State AGbd_7bb1b7c02ea279132023-12-19Verified by operator

Name: Great Valley School District
norm: great valley school district
Domain: gvhs.gvsd.org

Name: Great Valley School District
norm: great valley school district
Domain: gvhs.gvsd.org
Industry: Educationllm

Discovered: Nov 10, 2023
Breach occurred: Oct 31, 2023 – Nov 10, 2023
Undetected for: 10 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 19, 2023
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Initial access: valid_credentials

During the incident: Launched an investigation, with the assistance of third-party cybersecurity specialists
Notified federal law enforcement and will cooperate with any investigation
Working to implement additional administrative and technical safeguards
Providing access to identity monitoring services for, through Equifax, to New Hampshire residents whose personal information was potentially affected by this event, at no cost to those individuals
Providing impacted individuals with guidance on how to better protect against identity theft and fraud
Providing written notice of this event to relevant state regulators
Providing written notice... to the three major consumer reporting agencies, Equifax, Experian, and TransUnion
Changes made: Implement additional administrative and technical safeguards to further enhance the security of its network
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(39 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 ↗

Vermont State AGDec 19 · first

Massachusetts State AGDec 19 · first

New Hampshire State AGDec 19 · first · this page

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://mm.nh.gov/files/uploads/doj/remote-docs/great-valley-school-district-20231219.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 19, 2023
Raw hash: 59d9d069d5e798000c9bb909257146dcdb7d824c8c46462917e1c577fcce98a1

Linked disclosures

Ransomware claims (1)

Regulatory filings (2) · sorted by filing gap

Reporting entityGreat Valley School District

Victim entityGreat Valley School District

Incidentdiscovered Nov 10, 2023

Stated responseLaunched an investigation, with the assistance of third-party cybersecurity specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov