CornerStone Staffing Solutions, Inc.
bd_ec840b7d9ffbec10 · schema v1 · pii pii-v1
Full breach record for CornerStone Staffing Solutions, Inc. →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Qilin 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
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Nov 13, 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 (5) · sorted by filing gap
- Massachusetts State AGbd_22dd62acb7c5bd852026-09-01 · +292dVerified
- Washington State AGbd_a19802f40428b48c2026-09-11 · +302dVerified
- California State AGbd_e4dfd8c0234818a12026-09-11 · +302dVerified
- Vermont State AGbd_29de5dbb97b766ee2026-09-12 · +303dVerified
Show 1 more filing ↓Show fewer ↑up to 306d gap
- Texas State AGbd_d3cf7d86357026862026-09-15 · +306dVerified by operator
Filing propagation · 6 filings · 5 states
View merged incident ↗Pattern: first filing Nov 13, last Sep 15 (TX) — a 306-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.
qilin
According to ransomware.live, Qilin ransomware was first observed in July of 2022. Qilin Ransomware is written in Golang and supports multiple encryption modes; all of which are controlled by the operator. Qilin actors practice double extortion – demanding payment for a decryptor, as well as for the non-release of stolen data.