MalwareOtherRansomwareData EncryptedTargetedIdentity (basic)LowContained

The Walters Art Museum

bd_7257c63a9f5d3b98 · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 18, 2023

Filed

Sep 27, 2024

To disclose

45 weeks

Affected

1state residents only

Linked

5 filings

Confidence

65%

Full breach record for The Walters Art Museum →

The Walters Art Museum experienced unauthorized access to its network between October 10 and November 18, 2023, disrupting system operability. The incident involved suspicious activity consistent with ransomware. Only names were accessed. The Museum offered credit monitoring and notified authorities.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 39 days

discovery → filing · 45 weeks / 314 days

Oct 10, 2023

Begins

Nov 18, 2023

Discovered

Sep 27, 2024

Filed

vs. sector median

+39 wks slower

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

Linked disclosures

Why this link?

Regulatory filings (4) · sorted by filing gap

Maine State AGbd_1d0cc9c91a47089e2024-09-27Candidate
Vermont State AGbd_425023d2d278c0f92024-09-27Verified
Indiana State AGbd_8b413c731a27125d2024-09-27Verified
New Hampshire State AGbd_b011fe186a7b076f2024-09-27Verified

Name: The Walters Art Museum
norm: the walters art museum

Name: The Walters Art Museum
norm: the walters art museum
Also named: The Trustees of the Walters Art Gallery, Inc.dba oflegal entity
the Walters Art Museumdba oftrade name
Industry: Otherllm

Discovered: Nov 18, 2023
Breach occurred: Oct 10, 2023 – Nov 18, 2023
Undetected for: 39 daysoccurrence → discovery
Materiality determined: —
Notification sent: Sep 27, 2024
Affected individuals: 1state-resident count only
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: External
Regulator citations: notifying relevant regulatory authorities

During the incident: Investigated and responded to it
Assessed the security of our network
Notified potentially affected individuals
Notifying relevant regulatory authorities
Offering credit and identity monitoring services through Experian
Changes made: Regularly review and enhance our existing policies and procedures related to data privacy
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 45 weeks(314 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 ↗

Maine State AGSep 27 · first

Vermont State AGSep 27 · first

Indiana State AGSep 27 · first

New Hampshire State AGSep 27 · first

Montana State AGSep 27 · 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://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1712.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Sep 27, 2024
Raw hash: 7040f10af2e1861948ae944c7f428464ad9f7b9b704ef0574995008d289b9873

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityThe Walters Art Museum

Victim entityThe Walters Art Museum

Incidentdiscovered Nov 18, 2023

Stated responseInvestigated and responded to it

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov