OSF HEALTHCARE SYSTEM
bd_f8ace411af1e1abf · schema v1 · pii pii-v1
Full breach record for OSF HEALTHCARE SYSTEM →10 incidents on fileThreat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Xinglocker on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.
Source: Ransomware.live
J jump to incidentP pin to compareR raw source
Incident timeline — mostly unverified
? — ?
Breach window unknown
May 18, 2021
Claim posted
—
Corroborated · see linked filings
Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Regulatory filings (8) · sorted by filing gap
- Montana State AGbd_642aeb97e779372a2021-10-01 · +136dVerified by operator
- Massachusetts State AGbd_b288deb4577e5ece2021-10-01 · +136dVerified
- HHS OCRbd_bf20565c237987762021-10-01 · +136dVerified by operator
- Illinois State AGbd_14299358f0ba63fe2021-01-01 · +137dVerified by operator
Show 4 more filings ↓Show fewer ↑up to 1898d gap
- Illinois State AGbd_c91f7fe398e530012021-01-01 · +137dVerified by operator
- Montana State AGbd_08d288f3d1ac951e2020-10-19 · +211dCandidate
- HHS OCRbd_83807d832a08bc802020-10-19 · +211dVerified
- HHS OCR enforcementbd_7fbc6210e9c1f4d52026-07-29 · +1898dVerified by operator
Filing propagation · 9 filings · 3 states
View merged incident ↗Pattern: first filing Oct 19 (MT), last Jul 29 — a 2109-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
Source ceiling
- actor name
- victim claim
- ransom/leak status
- discovery date
- materiality
- notification
- affected count
- confirmed data types
- compliance clock
The ✕ fields stay blank until a regulatory filing or victim disclosure lands.
xinglocker
According to ransomware.live, XingLocker is a ransomware group that emerged in May 2021 as part of a franchise-style RaaS model built on a customized MountLocker payload, using IcedID for initial access and Windows Active Directory APIs for worm-style lateral movement across networks.