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

Confidence

65%

Full breach record for Hathaway Brown School →2 incidents on file

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

vs. sector median

+9 wks slower

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed1 affectedView incident

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.

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

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