MalwareEducationEducationRansomwareData ExfiltratedRansom DemandedRansom PaidSupply Chain (3P Vendor)Customer Data InvolvedIdentity (basic)Government IDMediumContained

Charleston Day School

bd_3a3ce0a6734a7426 · schema v1 · pii pii-v1

Severity

Medium

Discovered

May 1, 2020

Filed

Dec 29, 2020

To disclose

35 weeks

Affected

1state residents only

Confidence

66%

Full breach record for Charleston Day School →2 incidents on file

Charleston Day School notified the New Hampshire Attorney General of a ransomware incident involving third-party vendor Blackbaud, Inc. The attack occurred between February 7 and May 20, 2020, and was discovered in May 2020. A subset of constituent data, including names and Social Security numbers, was exfiltrated. Blackbaud paid the ransom and confirmed data destruction. One New Hampshire resident was notified on December 29, 2020, and offered two years of credit monitoring.

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Incident timeline

undetected · 84 days

discovery → filing · 35 weeks / 242 days

Feb 7, 2020

Begins

May 1, 2020

Discovered

Dec 29, 2020

Filed

vs. sector median

+26 wks slower

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

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

Name: Charleston Day School
norm: charleston day school
Domain: charlestondayschool.org

Name: Charleston Day School
norm: charleston day school
Domain: charlestondayschool.org
Industry: Educationllm

Discovered: May 1, 2020
Breach occurred: Feb 7, 2020 – May 20, 2020
Undetected for: 84 daysoccurrence → discovery
Materiality determined: —
Notification sent: Dec 29, 2020
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government ID
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
Initial access: exploit_public_facing

During the incident: Engaged independent forensics experts
Notified law enforcement (FBI)
Expelled the cybercriminal from Blackbaud’s system
Paid the cybercriminal’s demand
Sent notification letters via U.S. Mail
Offered 2 years of free credit monitoring and identity theft protection services
Changes made: Implemented numerous security changes
Fixed the vulnerability associated with the incident
Confirmed through testing by multiple third parties that its fix withstands all known attack tactics
Hardening its environment through enhancements to access management
Network segmentation
Deployment of additional endpoint and network-based platforms
Hired a third-party team of experts to monitor the dark web
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 35 weeks(242 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://mm.nh.gov/files/uploads/doj/remote-docs/charleston-day-school-20201229.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 29, 2020
Raw hash: e1dc49800e0469026eb992c22e35831884e229563c4a19269309ef37cb31df69

Reporting entityCharleston Day School

Victim entityCharleston Day School

Incidentdiscovered May 1, 2020

Stated responseEngaged independent forensics experts

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov