MalwareEducationEducationRansomwareData ExfiltratedData EncryptedCustomer Data InvolvedEmployee Data InvolvedGovernment IDIdentity (basic)HighContained

Riverhead Central School District

bd_c0a2cd50bb9bb3ce · schema v1 · pii pii-v1

Severity

High

Discovered

Dec 3, 2021

Filed

Mar 23, 2022

To disclose

16 weeks

Affected · nationwide

22,0502 in this filing

Linked

6 filings

Confidence

66%

Full breach record for Riverhead Central School District →

Riverhead Central School District experienced a ransomware attack on November 9, 2021, discovered on December 3, 2021. The incident affected 22,050 individuals, including names and Social Security Numbers. The district notified affected individuals on March 22, 2022, and provided 12 months of credit monitoring and ID protection through TransUnion/IDX. Two Maine residents were specifically identified among the affected.

J jump to incidentP pin to compareR raw source

Maine clockDiscovered Dec 3, 2021 → Filed with AG Mar 23, 2022110d ✗ ME AG >90d16 weeks discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 24 days

discovery → filing · 16 weeks / 110 days

Nov 9, 2021

Begins

Dec 3, 2021

Discovered

Mar 23, 2022

Filed

vs. sector median

+7 wks slower

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

A leak claim by lockbit2 about this victim predates this filing by 88 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (1)

Leak Sitelockbit2bd_9ca96c21115b66062021-12-25 · +88dVerified by operator

Regulatory filings (4) · sorted by filing gap

Massachusetts State AGbd_9f3aac9faa2a339e2022-03-23Verified by operator
New Hampshire State AGbd_e0a932472bb3ecb12022-03-24 · +1dVerified
Indiana State AGbd_53c209c30674d5902022-03-22 · +1dVerified by operator
Montana State AGbd_839dca45a9638ee42022-03-22 · +1dVerified

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: 22,050state + nationwide
Data types: Government IDIdentity (basic)
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1190 Exploit Public-Facing Application
Threat actor: ExternalFinancial
Regulator citations: Filed data breach notice with Maine Attorney General
Initial access: exploit_public_facing

During the incident: Sent written notification to affected individuals
Offered 12 months of ID protection and credit monitoring via TransUnion/IDX
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 16 weeks(110 days from discovery to filing)
Compliance flags: ME AG >90d · 110dME resident >60d · 109dLeak >30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.
Clock breakdown: Statute Window Elapsed Threshold Status
Maine
Discovered: Dec 3, 2021
→ Filed with AG: Mar 23, 2022
110d 90 days ME AG >90d
Maine
Discovered: Dec 3, 2021
→ Notified: Mar 22, 2022
109d 60 days (analyst band; statutory cap is 30 days) ME resident >60d

Statute	Window	Elapsed	Threshold	Status
Maine	Discovered: Dec 3, 2021 → Filed with AG: Mar 23, 2022	110d	90 days	ME AG >90d
Maine	Discovered: Dec 3, 2021 → Notified: Mar 22, 2022	109d	60 days (analyst band; statutory cap is 30 days)	ME resident >60d

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

Massachusetts State AG+1d

Maine State AG+1d · this page

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://www.maine.gov/agviewer/content/ag/985235c7-cb95-4be2-8792-a1252b4f8318/12cdefbd-34c3-417c-8679-d072fc4c1850.shtml
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 23, 2022
Raw hash: 907d4cafcc29e1bec7970dc258459d064a059b71d0313ac66cb7a7c6d9d6e04b

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 responseSent written notification to affected individuals

ComplianceME AG >90d

Extraction provenanceno artifact recorded

Source provenancewww.maine.gov