HackingHealthcareHealthcareStolen CredentialsData ExfiltratedCustomer Data InvolvedDelayed DiscoveryPIIIdentity (basic)Government IDHealth (basic)MediumActive

CITY OF HOPE

bd_4e34f10272b1cbb2 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Oct 13, 2023

Filed

Apr 2, 2024

To disclose

25 weeks

Affected

181state residents only

Linked

10 filings

Confidence

66%

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

City of Hope, a cancer treatment and research organization, notified the New Hampshire Attorney General on April 2, 2024, of a data breach affecting approximately 181 NH residents. Unauthorized access occurred between September 19 and October 12, 2023. The incident involved the exfiltration of personal and health information, including names, medical record numbers, and potentially government IDs. City of Hope engaged forensic investigators, reported to law enforcement, and offered credit monitoring to affected individuals. The investigation was ongoing at the time of filing.

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

Montana State AGbd_512fd9d9da2e106b2024-04-02Candidate
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: Apr 2, 2024
Affected individuals: 181state-resident count only
Data types: PIIIdentity (basic)Government IDHealth (basic)
Data elements: Medical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1119 Automated CollectionT1078 Valid Accounts
Threat actor: External
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 and affected data with the assistance of a leading cybersecurity firm
Reported the incident to law enforcement
Provided initial notice of the cybersecurity incident to potentially affected data subjects
Enlisted the support of a leading cybersecurity firm to enhance the security of its network, systems, and data
Provided notice recipients the opportunity to enroll in complimentary credit monitoring services
Notified regulatory bodies
Changes made: Implemented additional and enhanced safeguards
Enlisted the support of a leading cybersecurity firm to enhance the security of its 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

Montana State AG+1d

Vermont State AG+1d

California State AG+1d

Washington State AG+1d

Maine State AG+1d

New Hampshire 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://mm.nh.gov/files/uploads/doj/remote-docs/city-hope-20240402.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: 115461df1feb4fa8b1057807d321e6763b7c523ac698da4bd8acde531fd2489e

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 provenancemm.nh.gov