Katten Muchin Rosenman LLP
bd_c40667d5cc81c4bb · schema v1 · pii pii-v2
Full breach record for Katten Muchin Rosenman LLP →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Silentransomgroup 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
Katten Muchin Rosenman is a full-service law firm headquartered in the United States. Operating across multiple offices in major American cities and internationally, the firm provides legal services in areas including corporate law, litigation, financial markets, real estate, intellectual property, and regulatory compliance. It serves clients across industries such as finance, entertainment, and healthcare, and is recognized as a prominent firm within the U.S. legal sector.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Sep 3, 2026
Claim posted
—
No filing yet · watching
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
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.
No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.
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.
silentransomgroup
According to ransomware.live, a former Conti team