Fred Hutchinson Cancer Center — October 2023 breach
Clustered 13 records across 8 jurisdictions: 12 filings and 1 leak-site claim · filing window Dec 20, 2023 → Feb 29, 2024 (dated filings only). View entity profile → Other incidents for this victim →
incident inc_9789705e3fa14c2c · merged by human · confidence 100%
Litigation Timing
Discovered → first regulatory filing
Range of discovered_at dates across filings
Days between the first sighting of the earliest-seen leak-site claim and the first regulatory filing. Measured from when the aggregator first saw the post, not the crew's own (often earlier) date. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.
Time between earliest and latest filing
Not recorded for this incident
Materiality delta · SEC filing delay — no SEC 8-K in this cluster.
Sensitive data
identity_governmentIncident timeline
Dashed segments are unestablished, not zero — they fill in as filings merge into this incident. Filings without a recorded filing day, or recorded as filed before the breach they report began, are not placed on this rail.
Member cascade — every filing and leak-site claim in this incident
- NOV 24Leak sitehunters_international postfirst record · attacker claim · unverifiedoperator-confirmedday 0
- DEC 20VT AGVT AG noticeno count statedoperator-confirmed+26d
- DEC 20IN AGIN AG noticestates nationwide total 554operator-confirmed+26d
- DEC 22MA AGMA AG notice277 MA residentsauto-linked+28d
- DEC 22HHS OCRHHS OCR noticestates nationwide total 1,840,927auto-linked+28d
- DEC 22OR AGOR AG noticestates nationwide total 339,469operator-confirmed+28d
- DEC 22CA AGCA AG noticeno count statedoperator-confirmed+28d
- DEC 22MT AGMT AG notice15,253 MT residentsoperator-confirmed+28d
- DEC 22WA AGWA AG noticestates nationwide total 1,694,184operator-confirmed+28d
- DEC 26HHS OCRHHS OCR noticestates nationwide total 20,192operator-confirmed+32d
- FEB 29MT AGMT AG notice211 MT residentsoperator-confirmed+97d
- FEB 29WA AGWA AG noticemost recent · 14,898 WA residentsauto-linked+97d
- AUG 1IL AGIL AG noticefiling day not on record · no count statedoperator-confirmed—
- Watching for additional filings — new sources merge into this incident automatically.
Roll-up facts — reconciled across members
- Breach window
- Nov 19, 2023 – Nov 25, 2023 VT AG
- Discovered
- Oct 27, 2023MT AG + WA AGNov 19, 2023VT AG + OR AG + CA AG +3filings disagree on discovery
- Data types
- Financial account · Health (basic) · Identity (basic) · Government ID · PHI · PII VT AG + HHS OCR + CA AG +3
- Attack vector
- Unauthorized Access VT AG
Each fact cites the member filing that establishes it; when filings conflict, every value shows with its source.
Count reconciliation
per-state reported counts
Nationwide (stated in a filing)
1,840,927
Sum of filed state slices
286,159· 15.5% of stated
84% of the stated total lives in states whose filings carry no count — the dashed share shrinks as filings land.
State AGs report only their own residents; teal bars show each state's reported slice. The gray US row is the nationwide total reported in a linked filing.
Evidence ladder — rungs this incident occupies
Attacker assertion only. Establishes: claim date, group, alleged victim.
No press coverage linked yet.
Unlocks: discovery date, data types, affected count, compliance clock.
No SEC filing or victim statement yet.
Merge provenance
- Method
- human
- Confidence
- 1.00 · above the 0.85 auto-merge floor
- Reviewed
- operator-reviewed Aug 25, 2026 · at least one link edge was human-adjudicated
- Audit
- Every link edge records its method, confidence and model + prompt versions (100% is the strongest edge).
Merges are reversible — a wrong link can be detached with its audit trail intact. How merging works.
Filing velocity
Spread
71 days
Cadence
~1 / 7.1d
vs. multi-state median
11.8× slower
About this clustering
DisclosureLens links filings into incidents through layered matchers: deterministic rules (same source document, multistate filings of one breach, tight-window same-victim pairs), a weighted-similarity scorer for cross-source candidates, and an operator review queue for everything uncertain. Each link records its own method and confidence — shown per filing in the timeline below. The system defaults to NOT merging when uncertain, because a false merge (collapsing two unrelated breaches) is more harmful than a false split (showing related filings separately); uncertain pairs route to human review instead of auto-merging. This page states only what the linked filings agree on; each filing's own account stays on its own record, linked from the timeline below.
The weekly clock on records like this one
The Disclosure Clock is a weekly briefing on what landed in the disclosure record, and the gap between the criminals' post and the regulator's filing — measured on the whole record, with the method shown.
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