Social EngineeringEducationEducationPhishingStolen CredentialsData ExfiltratedCustomer Data InvolvedEmployee Data InvolvedPIIIdentity (basic)Government IDFinancial accountHealth (basic)CredentialsMediumContained

Manhattan School of Music

bd_06e0f55c9d01c807 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 17, 2021

Filed

Feb 18, 2022

To disclose

44 weeks

Affected

3state residents only

Linked

5 filings

Confidence

65%

Full breach record for Manhattan School of Music →2 incidents on file

Manhattan School of Music notified individuals of unauthorized access to employee email accounts between April 17 and June 17, 2021. The incident involved the compromise of personal, financial, health, and credential data for current and former students and employees. The school engaged forensic specialists, secured systems, and offered one year of identity monitoring.

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Incident timeline

discovery → filing · 44 weeks / 307 days

Apr 17, 2021

Begins

Apr 17, 2021

Discovered

Feb 18, 2022

Filed

vs. sector median

+35 wks slower

This filing is one of 5 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Indiana State AGbd_215024a6205bcd5a2022-02-18Verified
Maine State AGbd_fd215a9ecdda06bf2022-02-18Verified by operator
Massachusetts State AGbd_6800b59af009a5bf2022-02-22 · +4dVerified
New Hampshire State AGbd_27eb08e7af441d842022-02-25 · +7dVerified

Name: Manhattan School of Music
norm: manhattan school of music

Name: Manhattan School of Music
norm: manhattan school of music
Industry: Educationllm

Discovered: Apr 17, 2021
Breach occurred: Apr 17, 2021 – Jun 17, 2021
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 18, 2022
Affected individuals: 3state-resident count only
Data types: PIIIdentity (basic)Government IDFinancial accountHealth (basic)Credentials
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid AccountsT1114 Email Collection
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Launched an investigation with the assistance of third-party computer forensic specialists
Took steps to secure our email system
Implemented additional security measures
Reviewing and enhancing existing policies and procedures
Providing access to one year of complimentary identity monitoring services through Kroll
Changes made: Implemented additional security measures
Reviewing and enhancing existing policies and procedures to reduce the likelihood of a similar future event
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 44 weeks(307 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 AGFeb 18 · first

Maine State AGFeb 18 · first

Montana State AGFeb 18 · first · this page

Massachusetts State AG+4d

New Hampshire State AG+7d

Pattern: first filing Feb 18 (IN), last Feb 25 (NH) — a 7-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/OCP/Consumer-Notification-Letter-228.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 18, 2022
Raw hash: 32473d5d2371947be3b64468bf5195a8a24ef3c9c2e343e0f346c1c7189b2010

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityManhattan School of Music

Victim entityManhattan School of Music

Incidentdiscovered Apr 17, 2021

Stated responseLaunched an investigation with the assistance of third-party computer forensic specialists

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov