MalwareOtherRansomwareData EncryptedCustomer Data InvolvedPIIIdentity (basic)LowContained

Detroit Symphony Orchestra

bd_adf7430409ccfd8b · schema v1 · pii pii-v1

Severity

Low

Discovered

Sep 27, 2023

Filed

Apr 1, 2024

To disclose

27 weeks

Affected

5state residents only

Linked

8 filings

Confidence

66%

Full breach record for Detroit Symphony Orchestra →

Detroit Symphony Orchestra notified NH AG of a security incident occurring Sept 19-27, 2023, discovered Sept 27, 2023. Unknown actor accessed network. 5 NH residents notified April 1, 2024. Identity protection services offered.

J jump to incidentP pin to compareR raw source

Leak gap clock✗ Leak >180d27 weeks discovery → filing

⚠ unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Incident timeline

undetected · 8 days

discovery → filing · 27 weeks / 187 days

Sep 19, 2023

Begins

Sep 27, 2023

Discovered

Apr 1, 2024

Filed

vs. sector median

+19 wks slower

This filing is one of 8 about the same incident.View merged incident

A leak claim by dispossessor about this victim predates this filing by 190 days.View originating leak claim

Linked disclosures

Why this link?

Ransomware claims (2)

Leak Sitesnatchbd_ca38a94d8a0d7c0c2023-11-01 · +152dVerified by operator
Leak Sitedispossessorbd_a8f30121c1ab9f032023-09-24 · +190dVerified by operator

Regulatory filings (5) · sorted by filing gap

Massachusetts State AGbd_34fc68c84112c0752024-04-01Verified
Montana State AGbd_919f3f213ee92ff02024-04-01Candidate
Vermont State AGbd_9d8c8188ac7132152024-04-01Verified
Indiana State AGbd_b634aa9051f7fd402024-04-01Verified

Show 1 more filing ↓

Maine State AGbd_f7448b52c6a737612024-04-01Verified by operator

Name: Constangy, Brooks, Smith & Prophete, LLP
norm: constangy brooks smith prophete

Name: Detroit Symphony Orchestra
norm: detroit symphony orchestra
Domain: dso.org
Industry: Otherllm

Discovered: Sep 27, 2023
Breach occurred: Sep 19, 2023 – Sep 27, 2023
Undetected for: 8 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 1, 2024
Affected individuals: 5state-resident count only
Data types: PIIIdentity (basic)
Attack vector: Unknown
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: External
Regulator citations: Notified New Hampshire Attorney General

During the incident: Engaged leading cybersecurity experts to assist with an investigation
Reported this incident to federal law enforcement
Notified affected individuals by letter
Offered complimentary identity protection services including credit monitoring, identity restoration services, and identity protection insurance through Cyberscout through Identity Force
Changes made: Implemented additional security measures to further harden its environment
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 27 weeks(187 days from discovery to filing)
Compliance flags: Leak >180d
Discovery-date grounding: unattributedNo provenance was recorded for this discovery date and it matches no other date on the record. It may be correct, but it is not independently grounded.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 6 filings · 6 states

View merged incident ↗

Massachusetts State AGApr 1 · first

Montana State AGApr 1 · first

Vermont State AGApr 1 · first

Indiana State AGApr 1 · first

Maine State AGApr 1 · first

New Hampshire State AGApr 1 · first · this page

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/detroit-symphony-orchestra-20240401.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 1, 2024
Raw hash: ef1805ca4e2951974ae1e3d1eb8490435236a318f36f81df023662b747546945

Linked disclosures

Ransomware claims (2)

Regulatory filings (5) · sorted by filing gap

Reporting entityConstangy, Brooks, Smith & Prophete, LLP

Victim entityDetroit Symphony Orchestra

Incidentdiscovered Sep 27, 2023

Stated responseEngaged leading cybersecurity experts to assist with an investigation

ComplianceLeak >180d

Extraction provenanceno artifact recorded

Source provenancemm.nh.gov