MalwareEducationEducationRansomwareRansom DemandedData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDMinorMediumContained

Riverhead Central School District

bd_839dca45a9638ee4 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Dec 3, 2021

Filed

Mar 22, 2022

To disclose

16 weeks

Affected · nationwide

4221 in this filing

Linked

6 filings

Confidence

66%

Full breach record for Riverhead Central School District →

Riverhead Central School District experienced a ransomware incident. Unauthorized access occurred on or about November 9, 2021, resulting in potential exposure of personal information including names, addresses, dates of birth, and Social Security numbers for approximately 422 individuals. The District notified the FBI and DHS, engaged cybersecurity firms, and offered credit monitoring services.

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Incident timeline

undetected · 24 days

discovery → filing · 16 weeks / 109 days

Nov 9, 2021

Begins

Dec 3, 2021

Discovered

Mar 22, 2022

Filed

vs. sector median

+7 wks slower

This filing is one of 6 about the same incident.View merged incident

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitelockbit2bd_9ca96c21115b66062021-12-25 · +87dVerified by operator

Regulatory filings (4) · sorted by filing gap

Indiana State AGbd_53c209c30674d5902022-03-22Verified by operator
Massachusetts State AGbd_9f3aac9faa2a339e2022-03-23 · +1dVerified by operator
Maine State AGbd_c0a2cd50bb9bb3ce2022-03-23 · +1dVerified
New Hampshire State AGbd_e0a932472bb3ecb12022-03-24 · +2dVerified

Name: Riverhead Central School District
norm: riverhead central school district
Domain: riverhead.net

Name: Riverhead Central School District
norm: riverhead central school district
Domain: riverhead.net
Industry: Educationllm

Discovered: Dec 3, 2021
Breach occurred: Nov 9, 2021
Undetected for: 24 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 22, 2022
Affected individuals: 422state + nationwide
Data types: Identity (basic)Government IDMinor
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: notified the Department of Homeland Securitynotified the Federal Bureau of Investigation’s cybersecurity unit, IC3
Initial access: valid_credentials

During the incident: Launched an investigation
Engaged a national cybersecurity firm to assist in assessing the scope of the incident
Took steps to mitigate the potential impact to our community
Notified the Department of Homeland Security and the Federal Bureau of Investigation’s cybersecurity unit, IC3 of this incident
Taking steps to strengthen our security posture to prevent a similar event from occurring again in the future
Arranged for you to enroll in a complementary, identity theft protection services through IDX
Changes made: Taking steps to strengthen our security posture to prevent a similar event from occurring again in the future
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(109 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 5 filings · 5 states

View merged incident ↗

Indiana State AGMar 22 · first

Montana State AGMar 22 · first · this page

Massachusetts State AG+1d

Maine State AG+1d

New Hampshire State AG+2d

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/Riverhead-Central-School-District-Consumer-Notification-Letter.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: 738fcea896068ddcb4c844fcbc2f9d5ebb9dca0a8f08276c34d6c33f95cfbe96

Linked disclosures

Ransomware claims (1)

Regulatory filings (4) · sorted by filing gap

Reporting entityRiverhead Central School District

Victim entityRiverhead Central School District

Incidentdiscovered Dec 3, 2021

Stated responseLaunched an investigation

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov