HackingHealthcareHealthcareStolen CredentialsData ExfiltratedTargetedIdentity (basic)LowContained

One Brooklyn Health System

bd_47a1c26225ef3e9d · schema v1 · pii pii-v1

Severity

Low

Discovered

Nov 19, 2022

Filed

Apr 20, 2023

To disclose

22 weeks

Affected

3state residents only

Linked

5 filings

Confidence

64%

Full breach record for One Brooklyn Health System →2 incidents on file

One Brooklyn Health notified Montana and other state AGs of a cybersecurity incident occurring between July 9 and November 19, 2022. Unauthorized access to computer systems resulted in the acquisition of patient names. OBH took systems offline, engaged external specialists, and provided 12 months of credit monitoring services to affected individuals.

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Incident timeline

undetected · 133 days

discovery → filing · 22 weeks / 152 days

Jul 9, 2022

Begins

Nov 19, 2022

Discovered

Apr 20, 2023

Filed

vs. sector median

+9 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

Maine State AGbd_33285da79ba345f92023-04-20Candidate
Indiana State AGbd_4735721f7791abbb2023-04-20Verified
Vermont State AGbd_eacc26e5f248e5f82023-04-20Verified
Massachusetts State AGbd_f13e21effaf2b9382023-04-20Verified

Name: One Brooklyn Health System
norm: one brooklyn health system
Domain: obhny.org

Name: One Brooklyn Health System
norm: one brooklyn health system
Domain: obhny.org
Industry: Healthcarellm

Discovered: Nov 19, 2022
Breach occurred: Jul 9, 2022 – Nov 19, 2022
Undetected for: 133 daysoccurrence → discovery
Materiality determined: —
Notification sent: Apr 20, 2023
Affected individuals: 3state-resident count only
Data types: Identity (basic)
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1119 Automated Collection
Threat actor: External
Regulator citations: Notified law enforcement and regulatory agenciesCooperated with the authorities’ independent investigation effortsCommunicated with law enforcement and with healthcare authorities
Initial access: valid_credentials

During the incident: Took systems offline
Worked with external specialists to commence an investigation
Performed a thorough review of the contents of the affected data
Notified law enforcement and regulatory agencies
Cooperated with the authorities’ independent investigation efforts
Communicated with law enforcement and with healthcare authorities
Providing access to Single Bureau Credit Monitoring/Single Bureau Credit Report/Single Bureau Credit Score services at no charge
Providing proactive fraud assistance
Changes made: Reviewing its existing policies and training protocols relating to data protection
Implemented enhanced security measures
Implemented additional monitoring tools
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 22 weeks(152 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 AGApr 20 · first

Indiana State AGApr 20 · first

Vermont State AGApr 20 · first

Massachusetts State AGApr 20 · first

Montana State AGApr 20 · 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-201.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 20, 2023
Raw hash: 84a18c52f53864eeccaaced12e27373a6d4f7b789a2082343ce4b5f838eda8be

Linked disclosures

Regulatory filings (4) · sorted by filing gap

Reporting entityOne Brooklyn Health System

Victim entityOne Brooklyn Health System

Incidentdiscovered Nov 19, 2022

Stated responseTook systems offline

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov