HackingHealthcareHealthcareStolen CredentialsCapture Stored DataData ExfiltratedCustomer Data InvolvedPHIIdentity (basic)Government IDHealth (basic)Financial accountMediumContained

Fred Hutchinson Cancer Center

bd_055977ba69ddd432 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 19, 2023

Filed

Dec 22, 2023

To disclose

5 weeks

Affected

Not disclosed

Linked

14 filings

Confidence

65%

Full breach record for Fred Hutchinson Cancer Center →4 incidents on file

Fred Hutchinson Cancer Center detected unauthorized activity on its clinical network on November 19, 2023. An unauthorized third party accessed the network and obtained files containing patient information, including names, addresses, SSNs, and health insurance details, between November 19 and November 25, 2023. The organization contained the activity, engaged forensic investigators, and is offering identity protection services to affected individuals.

J jump to incidentP pin to compareR raw source

Incident timeline

discovery → filing · 5 weeks / 33 days

Nov 19, 2023

Begins

Nov 19, 2023

Discovered

Dec 22, 2023

Filed

vs. sector median

6 wks faster

This filing is one of 14 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (10) · sorted by filing gap

Oregon State AGbd_00321461c9a219542023-12-22Verified
Montana State AGbd_390649f2c75439432023-12-22Verified
Massachusetts State AGbd_632cb3e03653a6452023-12-22Verified
HHS OCRbd_734a45a1ef5248522023-12-22Verified

Show 6 more filings ↓up to 223d gap

Washington State AGbd_b7c7ee56fd79dc242023-12-22Verified by operator
Vermont State AGbd_12adcd78f9e863af2023-12-20 · +2dVerified by operator
HHS OCRbd_8814fc6d061ec55d2023-12-26 · +4dVerified by operator
Washington State AGbd_925ee43ceec80c672024-02-29 · +69dVerified
Montana State AGbd_939adbdc1316f7952024-02-29 · +69dVerified by operator
Illinois State AGbd_e82634db0b6646752024-08-01 · +223dVerified by operator

Showing first 10 of 13 linked disclosures.

Name: Fred Hutchinson Cancer Center
norm: fred hutchinson cancer center
Domain: fredhutch.org

Name: Fred Hutchinson Cancer Center
norm: fred hutchinson cancer center
Domain: fredhutch.org
Industry: Healthcarellm

Discovered: Nov 19, 2023
Breach occurred: Nov 19, 2023 – Nov 25, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: Not disclosed
Data types: PHIIdentity (basic)Government IDHealth (basic)Financial account
Data elements: Social Security numberDate of birthMedical information
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: External
Regulator citations: Filed notification with California Attorney General

During the incident: Took steps to contain the activity
Began an investigation with the assistance of a third-party forensic firm
Implemented additional defensive tools
Increased monitoring
Offering complimentary Experian IdentityWorks Credit 3B membership
Changes made: Continuously updating and enhancing systems to protect data
Implemented additional defensive tools
Increased monitoring
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(33 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 11 filings · 7 states

View merged incident ↗

Vermont State AGDec 20 · first

Oregon State AG+2d

Montana State AG+2d

Massachusetts State AG+2d

HHS OCR+2d

Washington State AG+2d

California State AG+2d · this page

HHS OCR+6d

Washington State AG+71d

Montana State AG+71d

Illinois State AG+225d

Pattern: first filing Dec 20 (VT), last Aug 1 (IL) — a 225-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Cascade drawn from the first 10 linked disclosures of 13 — the full spread may be wider.

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://oag.ca.gov/ecrime/databreach/reports/sb24-578365
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 22, 2023
Raw hash: 79dbaedb0354ce1ec63a7734454c4d561b60c8134a4635c5305643d252090f23

Linked disclosures

Regulatory filings (10) · sorted by filing gap

Reporting entityFred Hutchinson Cancer Center

Victim entityFred Hutchinson Cancer Center

Incidentdiscovered Nov 19, 2023

Stated responseTook steps to contain the activity

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceoag.ca.gov