HackingHealthcareHealthcareStolen CredentialsData ExfiltratedTargetedIdentity (basic)Government IDFinancial accountPHIHealth (basic)MediumContained

CITY OF HOPE

bd_512fd9d9da2e106b · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 13, 2023

Filed

Apr 2, 2024

To disclose

25 weeks

Affected

580state residents only

Linked

10 filings

Confidence

66%

Full breach record for CITY OF HOPE →4 incidents on file

City of Hope notified Montana residents of a data breach where unauthorized access occurred between September 19 and October 12, 2023. The incident exposed PHI, SSNs, financial data, and identity information. City of Hope engaged forensic investigators, reported to law enforcement, and provided two years of Kroll identity monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 24 days

discovery → filing · 25 weeks / 172 days

Sep 19, 2023

Begins

Oct 13, 2023

Discovered

Apr 2, 2024

Filed

vs. sector median

+13 wks slower

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

New Hampshire State AGbd_4e34f10272b1cbb22024-04-02Verified
Vermont State AGbd_56c727d6f5a7adc52024-04-02Verified
California State AGbd_646c0dd6c4c8efee2024-04-02Verified
Washington State AGbd_a206c1ef5bf16dae2024-04-02Verified

Show 5 more filings ↓up to 14d gap

Maine State AGbd_eacec21685bd1ec22024-04-02Verified
Massachusetts State AGbd_2963f93446a9bd2d2024-04-03 · +1dVerified
Oregon State AGbd_9a6d405cfd05175c2024-04-03 · +1dVerified
Illinois State AGbd_cc2dd60a76809e902024-04-01 · +1dVerified
Oregon State AGbd_2b407412ec00741d2024-04-16 · +14dVerified

Name: CITY OF HOPE
norm: city of hope
Domain: cityofhope.org

Name: CITY OF HOPE
norm: city of hope
Domain: cityofhope.org
Industry: Healthcarellm

Discovered: Oct 13, 2023
Breach occurred: Sep 19, 2023 – Oct 12, 2023
Undetected for: 24 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 580state-resident count only
Data types: Identity (basic)Government IDFinancial accountPHIHealth (basic)
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: reported the incident to law enforcementnotified regulatory bodies
Initial access: valid_credentials

During the incident: Instituted mitigation measures
Launched an investigation into the nature and scope of the incident with the assistance of a leading cybersecurity firm
Undertaken a detailed review of the copied files
Implemented additional and enhanced safeguards
Enlisted the support of a leading cybersecurity firm to enhance the security of our network, systems, and data
Reported the incident to law enforcement
Notified regulatory bodies
Secured the services of Kroll to provide identity monitoring at no cost to you for two years
Changes made: Implemented additional and enhanced safeguards
Enlisted the support of a leading cybersecurity firm to enhance the security of our network, systems, and data
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 25 weeks(172 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 9 states

View merged incident ↗

Illinois State AGApr 1 · first

New Hampshire State AG+1d

Vermont State AG+1d

California State AG+1d

Washington State AG+1d

Maine State AG+1d

Montana State AG+1d · this page

Massachusetts State AG+2d

Oregon State AG+2d

Oregon State AG+15d

Pattern: first filing Apr 1 (IL), last Apr 16 (OR) — a 15-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-1260.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Apr 2, 2024
Raw hash: a19a566911fe028e922ad52757d25862b57887a5c23e3e4037ef7ab654864f76

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityCITY OF HOPE

Victim entityCITY OF HOPE

Incidentdiscovered Oct 13, 2023

Stated responseInstituted mitigation measures

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov