GLOBALClaimed by RyukFirst sightinglinked via shared-victim match · 100%
Posted to leak site Oct 11, 2020bd_d5c0b92a97b9e8c7
Clustered 4 filings across 4 jurisdictions · filing window Oct 11, 2020 → Dec 11, 2020. View entity profile → Other incidents for this victim →
incident inc_ed828d81501c43a1 · merge_method human · confidence 100%
Discovered → first regulatory filing
Range of discovered_at dates across filings
Gap between first leak claim and first regulatory filing
Time between earliest and latest filing
Not recorded for this incident
Materiality delta · SEC filing delay — no SEC 8-K in this cluster.
CA MT OR
Leak Site · State AG
Earliest sighting first · deep chronology in Litigation Timeline
Sep 10, 2020 → Oct 11, 2020
When the intrusion reportedly occurred, per the linked filings
Oct 11, 2020
Reported by CALIFORNIA AG filing
Nov 20, 2020
Reported by OREGON AG filing
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. Filing summaries shown in the timeline are AI-generated extracts — verify each against its linked source.
Sonoma Valley Hospital suffered a ransomware attack on October 11, 2020, attributed to a Russian threat actor. The incident occurred between September 10 and October 11, 2020. Patient health information (PHI), including names, addresses, birthdates, insurer details, and diagnosis codes, was potentially disclosed. Employee data, including SSNs and health test results, was also compromised. Systems were shut down to contain the attack, and ransom was not paid. Enhanced security measures were implemented.
Sonoma Valley Hospital reported a data breach to the Montana Attorney General. The breach was reported on 2020-12-11. The breach occurred on 10/11/2020. 45 Montana residents were affected.
Affected (this filing): 45
Sonoma Valley Hospital reported a data breach to the Oregon Attorney General. The breach was reported on 2020-12-11. The breach occurred during 9/10/2020 - 10/11/2020. The breach was discovered on 11/20/2020. 69,000 individuals were affected. Notice was sent on 12/10/2020.
Affected (this filing): 69,000