This record tracks a ransomware attack claimed by the
N0n group against
Arthritis Center of Riverside. It collects the publicly disclosed attack details — sector, location and
timeline — as published on the operator's leak site and indexed by Breach House.
Window Zero
EXPOSURE GAP
Window Zero is the time the breach stayed in the open before
anyone said so — the gap between when the attack was first discovered
on the operator's leak site (t1) and when it was publicly disclosed (t2).
The wider this window, the longer victims, staff and customers were exposed with no warning.
0days open
t1 · Published
t2 · Pending
Business Category
Healthcare / Pharma
Indexed by Breach House
October 24, 2026
Leak Status
pending
checked 2026-10-24
Disclosed / Notified
Not disclosed yet
Attack Summary
The Arthritis Center of Riverside operates within the healthcare and medicine sector, providing patient care and related medical services in the United States. As part of the threat-intelligence index, this entity is documented as a ransomware victim linked to the threat actor N0n. This listing type indicates that the organization was impacted by ransomware activity, consistent with the observed threat actor profile. The description focuses on the entity's sector classification and its inclusion in the ransomware victim category tied to N0n, without speculating on breach details. Such catalog entries support security professionals in tracking real-world incidents and correlating victim profiles with active threat actors across critical infrastructure sectors.
Leak Screenshots
1 CAPTURED
Captured directly from the operator's leak site by our collector, last checked 2026-10-24. Verdict evidence: [G4] Victim listed in the N0N Active section; publication not verified
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Dark Web Exposure
Cross-referenced against HaveIBeenRansom's dark-web index of ransomware leaks, breaches & infostealer logs.
0
found in Infostealer logs
0
found in Traditional breaches
0
found in Ransomware leaks
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Full exposure is locked
See every breached email, the internal-vs-external split and each leak source behind this victim.
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