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Mayo Clinic (USA)

0apt

This record tracks a ransomware attack claimed by the 0apt group against Mayo Clinic (USA). 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.

208days open
t1 · Published t2 · Pending
Feb 04, 2026Not disclosed yet
Country
United States
Business Category
Healthcare / Pharma
Employees
51-100
Discovered
2026-02-04
Published
February 04, 2026
Disclosed / Notified
Not disclosed yet
Victim ID
Z9r5KNrR7HIV

Attack Summary

Mayo Clinic is a private American academic medical center focused on integrated healthcare, education, and research, with major campuses in Rochester, Minnesota; Jacksonville, Florida; and Phoenix/Scottsdale, Arizona. It maintains a nonprofit hospital system offering comprehensive medical specialties and virtual care 24/7 through its patient portal. The organization serves patients from over 130 countries with world-class expertise in diagnosing and treating complex medical challenges. Mayo Clinic was neutrally listed as a ransomware victim associated with the threat actor 0apt.

Leak Screenshots

SAMPLE

Proof-of-breach screenshots the operator posted from the stolen data. Previews are redacted and locked — the originals are available on HaveIBeenRansom.

file_tree.png
finance_2024.xlsx
passport_scan.jpg
contract_signed.pdf
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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
Emails exposed
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External
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Distinct leaks
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••• emails
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••• emails
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••• emails
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••• emails
Full exposure is locked
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View Group: 0apt

Related entries

HCA Healthcare UK (Private Division) Vestas Wind Systems (Denmark) Edwards Lifesciences (USA) Keysight Technologies (USA) Hologic, Inc. (USA) Galderma Pharma (Switzerland)
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