Chester County Library System, PA
bd_e8349e010beea07a · schema v1 · pii pii-v1
Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Lynx 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
Post text · scraped from the leak site
The Chester County Library & District Center was established in 1962 and moved to its current location in 1980. Largely supported by the County of Chester, the library serves as the District Center as well as the Chester County Library System headquarters. Although we serve primarily West Whiteland and Uwchlan Township residents, our expansive and comprehensive collection of nearly 328,000 items helps to support the other 16 member libraries in the system. The Henrietta Hankin Branch Library, also supported by the County of Chester, opened in July of 2003 to serve the northern region of Chester County. Our collection of over 93,600 items serves the residents of Upper Uwchlan and West Vincent Townships as well as several other townships in the area. Both libraries serve as community centers, providing work space, meeting rooms, homework and research help, and a wide variety of educational and cultural programs.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Oct 21, 2025
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 (1) · sorted by filing gap
- Massachusetts State AGbd_8944629f97ee5ee02025-11-07 · +17dVerified by operator
Filing propagation · 2 filings
View merged incident ↗Pattern: first filing Oct 21, last Nov 7 (MA) — a 17-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.
lynx
According to ransomware.live, Lynx is a ransomware-as-a-service operation that emerged in mid-2024 as a rebrand of INC Ransomware (whose source code was sold for $300,000 on the RAMP forum), claiming ~300 victims across manufacturing, business services, technology, and transportation with an 80/20 profit split for affiliates.