One linked filing — more sources may join as they report · filed Nov 13, 2020. View entity profile → Other incidents for this victim →
incident inc_daa6d8576bdf47e0 · merge_method deterministic
Discovered → first regulatory filing
Not recorded for this incident
Discovery variance · Leak precedence · Materiality delta · SEC filing delay · Filing span — no leak-site claim in this cluster; no SEC 8-K in this cluster; needs two dated filings.
Government ID · Identity (basic) · Health (basic)
CA
all State AG
Earliest sighting first · deep chronology in Litigation Timeline
Jun 1, 2020
When the intrusion reportedly occurred, per the linked filings
Jun 1, 2020
Reported by CALIFORNIA AG filing
On June 1, 2020, University of California San Francisco (UCSF) detected a ransomware attack on a limited part of its School of Medicine IT environment. The attacker obtained certain files and encrypted others. UCSF contained the incident, paid the ransom to decrypt data, and notified law enforcement. Affected data may include names, SSNs, health information, and financial data. UCSF offered 12 months of credit monitoring.
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.