Jeffrey W Krol & Associates
bd_216eeebc824b0e8b · schema v1 · pii pii-v1
Full breach record for Jeffrey W Krol & Associates →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Sinobi 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
Jeffrey W. Krol & Associates, Ltd. is a full-service certified public accounting firm based in Chicago, Illinois, serving a diverse clientele across the United States. The firm offers a wide range of services including personal financial planning, business accounting, tax preparation, and QuickBooks services. Their dedicated team provides professional and personalized guidance to both individuals and businesses, addressing various financial and business needs. With years of experience, Krol & Associates is committed to assisting clients in navigating their accounting challenges.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Dec 7, 2025
Claim posted
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Corroborated · see linked filings
This record's own dates cannot anchor compliance clocks; see the linked filings.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Regulatory filings (6) · sorted by filing gap
- Illinois State AGbd_83c0ced7e827a4942026-01-01 · +24dCandidate
- New Hampshire State AGbd_137cee464a26dd262026-01-12 · +35dVerified
- Indiana State AGbd_297b05d8f3f709f82026-01-13 · +36dVerified
- Maine State AGbd_adcc2022b5dd9d4e2026-01-13 · +36dVerified
Show 2 more filings ↓Show fewer ↑up to 39d gap
- Massachusetts State AGbd_70e64b4dea8556c82026-01-14 · +37dVerified
- Nebraska State AGbd_001f19c24c6b82ea2026-01-16 · +39dVerified
Filing propagation · 6 filings · 6 states
View merged incident ↗Pattern: first filing Jan 1 (IL), last Jan 16 (NE) — a 15-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.
sinobi
According to ransomware.live, Sinobi is a private vetted-affiliate RaaS group that emerged in mid-2025, believed to be a rebrand of the Lynx/INC ransomware lineage, claiming 176 victims by end of 2025 through double-extortion attacks primarily against mid-market US organizations via compromised SonicWall VPN credentials.