MalwareEducationEducationRansomwareSupply Chain (3P Vendor)Ransom DemandedRansom PaidData ExfiltratedData EncryptedCustomer Data InvolvedIdentity (basic)Government IDFinancial accountMediumResolved

Holderness School

bd_322a06c8f7bff71f · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 16, 2020

Filed

Mar 1, 2021

To disclose

33 weeks

Affected

7state residents only

Linked

4 filings

Confidence

65%

Full breach record for Holderness School →

Holderness School notified Montana residents of a third-party vendor (Blackbaud) ransomware incident. Unauthorized access occurred Feb-May 2020. Backup files containing names, SSNs, and financial account numbers were exfiltrated. Blackbaud paid ransom and confirmed data destruction. Holderness offered 2 years of credit monitoring.

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Incident timeline

undetected · 160 days

discovery → filing · 33 weeks / 228 days

Feb 7, 2020

Begins

Jul 16, 2020

Discovered

Mar 1, 2021

Filed

vs. sector median

+24 wks slower

This filing is one of 4 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_33ad046cd66f8d752021-03-01Candidate
Massachusetts State AGbd_fce35c5de2aad0d42021-03-01Verified
New Hampshire State AGbd_a954f6b831109e3d2021-03-02 · +1dVerified

Name: Holderness School
norm: holderness school

Name: Holderness School
norm: holderness school
Industry: Educationllm

Discovered: Jul 16, 2020
Breach occurred: Feb 7, 2020 – May 20, 2020
Undetected for: 160 daysoccurrence → discovery
Materiality determined: —
Notification sent: Mar 1, 2021
Affected individuals: 7state-resident count only
Data types: Identity (basic)Government IDFinancial account
Attack vector: Third-Party / Supply Chain
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Blackbaud has been working with law enforcement
Third party: via Blackbaud, Inc.

During the incident: Conducted own investigation of the Blackbaud services
Worked with Blackbaud to identify the individuals whose information may have been involved
Notifying affected individuals
Offering complimentary membership to Identity Monitoring and Fraud Resolution services for two years
Changes made: Blackbaud identified and fixed the vulnerability associated with this incident
Implemented several changes that will better protect your data from any subsequent incidents
Undertaking additional efforts to harden their environment through enhancements to access management
Network segmentation
Deployment of additional endpoint and network-based platforms
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 33 weeks(228 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 AGMar 1 · first

Massachusetts State AGMar 1 · first

Montana State AGMar 1 · first · this page

New Hampshire State AG+1d

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/Holderness-Notif.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 1, 2021
Raw hash: 5795fa6fc641f2f2d434dae29c9b4d26486c206729ab02d1b0b2dda6cec5deb9

Linked disclosures

Regulatory filings (3) · sorted by filing gap

Reporting entityHolderness School

Victim entityHolderness School

Incidentdiscovered Jul 16, 2020

Stated responseConducted own investigation of the Blackbaud services

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov