HackingEducationEducationPhishingStolen CredentialsTargetedCustomer Data InvolvedEmployee Data InvolvedIdentity (basic)Government IDFinancial accountHealth (basic)CredentialsMediumContained

Manhattan School of Music

bd_27eb08e7af441d84 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Jun 17, 2021

Filed

Feb 25, 2022

To disclose

36 weeks

Affected

1state residents only

Linked

5 filings

Confidence

66%

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

Manhattan School of Music notified NH AG of unauthorized access to employee email accounts between April 17 and June 17, 2021. Discovered June 17, 2021. Affected 1 NH resident. Data included PII, SSN, financial, health, and credentials. Response included forensic investigation and 1-year credit monitoring.

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Incident timeline

undetected · 61 days

discovery → filing · 36 weeks / 253 days

Apr 17, 2021

Begins

Jun 17, 2021

Discovered

Feb 25, 2022

Filed

vs. sector median

+28 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

Massachusetts State AGbd_6800b59af009a5bf2022-02-22 · +3dVerified
Montana State AGbd_06e0f55c9d01c8072022-02-18 · +7dCandidate
Indiana State AGbd_215024a6205bcd5a2022-02-18 · +7dVerified
Maine State AGbd_fd215a9ecdda06bf2022-02-18 · +7dVerified by operator

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

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

Discovered: Jun 17, 2021
Breach occurred: Apr 17, 2021 – Jun 17, 2021
Undetected for: 61 daysoccurrence → discovery
Materiality determined: —
Notification sent: Feb 18, 2022
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDFinancial accountHealth (basic)Credentials
Attack vector: Phishing
MITRE ATT&CK: T1566.002 Spearphishing LinkT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: phishing_link

During the incident: Launched an investigation with the assistance of third-party computer forensic specialists
Undertook a lengthy and comprehensive process to review the contents of those accounts
Conducted an additional review in order to identify contact information for potentially impacted individuals
Took steps to notify potentially affected individuals
Provided access to complimentary credit monitoring services for one year, through Kroll
Provided impacted individuals with guidance on how to better protect against identity theft and fraud
Changes made: Working to implement additional safeguards and training to its employees
Implemented additional security measures
Reviewing and enhancing existing policies and procedures
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 36 weeks(253 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 ↗

Montana State AGFeb 18 · first

Indiana State AGFeb 18 · first

Maine State AGFeb 18 · first

Massachusetts State AG+4d

New Hampshire State AG+7d · this page

Pattern: first filing Feb 18 (MT), 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://mm.nh.gov/files/uploads/doj/remote-docs/manhattan-school-music-20220225.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Feb 25, 2022
Raw hash: 9d4be7af56e51a4f3af6d24e406b3fdd731e9861f34b5e43fa29759489f33098

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityManhattan School of Music

Victim entityManhattan School of Music

Incidentdiscovered Jun 17, 2021

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

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov