MalwareEducationEducationRansomwareData ExfiltratedData EncryptedSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

Westminster School

bd_39063a890e34f9de · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 16, 2020

Filed

Dec 8, 2020

To disclose

21 weeks

Affected

2state residents only

Linked

4 filings

Confidence

66%

Full breach record for Westminster School →

Westminster School notified the New Hampshire Attorney General of a cybersecurity incident involving its third-party vendor, Blackbaud, Inc. An unauthorized third party exfiltrated data from Blackbaud's systems between April 18, 2020, and May 7, 2020. Although ransomware was attempted, it was prevented; however, data was exfiltrated. Personal information of two New Hampshire residents, including names and Social Security numbers/Tax ID numbers, was potentially accessed. Westminster provided credit monitoring services to affected individuals.

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Incident timeline

undetected · 89 days

discovery → filing · 21 weeks / 145 days

Apr 18, 2020

Begins

Jul 16, 2020

Discovered

Dec 8, 2020

Filed

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

Part of BLACKBAUD, INC. supply-chain incident (2020) — a supply-chain cascade affecting multiple organizations.View cascade →

Linked disclosures

Why this link?

Regulatory filings (3) · sorted by filing gap

Maine State AGbd_2bfc380e7a17af9e2020-12-07 · +1dCandidate
Massachusetts State AGbd_4efa5d69b41ec6b62020-12-07 · +1dVerified
Oregon State AGbd_691e794e88e12bc92020-12-07 · +1dVerified

Name: Polsinelli PC
norm: polsinelli

Name: Westminster School
norm: westminster school
Domain: westminster-school.org
Industry: Educationllm

Discovered: Jul 16, 2020
Breach occurred: Apr 18, 2020 – May 7, 2020
Undetected for: 89 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 7, 2020
Affected individuals: 2state-resident count only
Data types: Identity (basic)Government ID
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified New Hampshire Attorney General
Third party: via Blackbaud, Inc.
Initial access: supply_chain

During the incident: Provided complimentary identity theft protection services through Blackbaud
Provided individuals with information on how they can protect themselves against fraudulent activity and identity theft
Changes made: Offered complimentary two-year membership of Single Bureau Credit Monitoring from CyberScout
Reviewing relationship with Blackbaud and technical controls for securing data
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 21 weeks(145 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 4 filings · 4 states

View merged incident ↗

Maine State AGDec 7 · first

Massachusetts State AGDec 7 · first

Oregon State AGDec 7 · first

New Hampshire State AG+1d · 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/westminster-school-20201208.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 8, 2020
Raw hash: 5af400b2922c6e31eaf8972336d92826097c3bc0b2d6ac1b22332554853596a7

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityPolsinelli PC

Victim entityWestminster School

Incidentdiscovered Jul 16, 2020

Stated responseProvided complimentary identity theft protection services through Blackbaud

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov