MalwareEducationEducationRansomwareRansom DemandedData ExfiltratedSupply Chain (3P Vendor)Identity (basic)Government IDMediumContained

Hathaway Brown School

bd_ae4d2250784106da · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jul 16, 2020

Filed

Nov 19, 2020

To disclose

18 weeks

Affected

1state residents only

Linked

5 filings

Confidence

65%

Full breach record for Hathaway Brown School →

Hathaway Brown notified Montana residents of a third-party data breach involving Blackbaud. A ransomware attack occurred between Feb 7 and May 20, 2020, resulting in data exfiltration. Personal information including full names and Social Security numbers was compromised. Blackbaud paid the ransom. Affected individuals received 24 months of credit monitoring.

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Incident timeline

undetected · 160 days

discovery → filing · 18 weeks / 126 days

Feb 7, 2020

Begins

Jul 16, 2020

Discovered

Nov 19, 2020

Filed

This filing is one of 5 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 (4) · sorted by filing gap

Massachusetts State AGbd_5a1cd288eec6de812020-11-19Verified
Maine State AGbd_bdb4a74ef8adcb822020-11-19Candidate
New Hampshire State AGbd_ad1fc6481ed333c22020-11-24 · +5dVerified
Indiana State AGbd_b8494d35a004ad772020-11-13 · +6dVerified

Name: Hathaway Brown School
norm: hathaway brown school
Domain: hb.edu

Name: Hathaway Brown School
norm: hathaway brown school
Domain: hb.edu
Industry: Educationllm

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

During the incident: Engaged outside experts experienced in handling these types of incidents
Initiated an internal investigation
Demanded detailed information from Blackbaud about the nature and scope of the incident
Provided access to Single Bureau Credit Monitoring services at no charge
Provided proactive fraud assistance
Closed the vulnerability that allowed the incident
Changes made: Enhancing security controls
Conducting ongoing efforts against incidents like this in the future
Continually evaluate and modify practices of third party service providers
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 18 weeks(126 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 AGNov 13 · first

Massachusetts State AG+6d

Maine State AG+6d

Montana State AG+6d · this page

New Hampshire State AG+11d

Pattern: first filing Nov 13 (IN), last Nov 24 (NH) — a 11-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

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/hbSamp.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Nov 19, 2020
Raw hash: e99c14ddca1d12115a16e7ad392a2130bd857bd6122b9d3310ebcf1ad305754c

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityHathaway Brown School

Victim entityHathaway Brown School

Incidentdiscovered Jul 16, 2020

Stated responseEngaged outside experts experienced in handling these types of incidents

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov