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Listed on a ransomware leak site

Katten Muchin Rosenman

katten.com

Katten Muchin Rosenman was listed on the Silent Ransom Group and Leakeddata leak site on Sep 3, 2026. Brandefense has recorded 2 separate claims against it. Information as of Oct 19, 2026.

Country: United StatesIndustry: Legal Services
Updated continuously · figures as of Oct 19, 2026
Claimed by
Silent Ransom Group, Leakeddata
First listed
Sep 3, 2026
Claims recorded
2

2 Leak-Site Claims.

Silent Ransom GroupConfirmed claim
Posted on the leak site
Sep 3, 2026
Collected by Brandefense
Sep 3, 2026
Data claimed
Not stated
Leak-site post text, written by the group
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.
LeakeddataConfirmed claim
Posted on the leak site
Sep 3, 2026
Collected by Brandefense
Sep 3, 2026
Data claimed
Not stated

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Other confirmed victims claimed by the same group
VictimClaimed byCountryIndustryData claimedPosted
Latham & Watkins
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Silent Ransom GroupUSUnited StatesLegal ServicesNot stated
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Silent Ransom GroupUSUnited StatesLegal ServicesNot stated
Baker McKenzie
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Silent Ransom GroupUSUnited StatesLegal ServicesNot stated
Andersen Group Inc.
andersongroupinc.com
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K...
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Silent Ransom GroupGBUnited KingdomEnergy and UtilitiesNot stated
Andersen Group
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Silent Ransom GroupUSUnited StatesConstructionNot stated
Other confirmed victims in the same industry
VictimClaimed byCountryIndustryData claimedPosted
Latham & Watkins
lw.com
LeakeddataUSUnited StatesLegal ServicesNot stated
Latham & Watkins
lw.com
Silent Ransom GroupUSUnited StatesLegal ServicesNot stated
torcivialaw.com
torcivialaw.com
LockBit 5.0USUnited StatesLegal ServicesNot stated
Boyle, Pecharich, Cline, Whittington and Stallings
prescottlawoffices.com
AkiraUSUnited StatesLegal ServicesNot stated
JJS Justice
jjsjustice.com
The GentlemenUSUnited StatesLegal ServicesNot stated
Iliff, Meredith, Wildberger & Brennan, P.C
ilimer.com
QilinUSUnited StatesLegal ServicesNot stated

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Figures as of Oct 19, 2026. Confirmed leak-site claims collected by Brandefense technologies and validated by Brandefense analysts.

Listed on a leak site means a ransomware group has claimed the company; it is not a confirmed breach. To request a correction or removal, contact Brandefense.