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Mitchell Silberberg & Knupp LLP

listed as MSK · Claimed by SilentRansomGroup · listed 8 months ago

7m
Age
since listed · data leaked

Status timeline

  1. ListedNov 25, 2025
  2. Data leakeddate unknown

At a glance

Group
SilentRansomGroup
Status
Data leaked
Country
Russia
Listed on leak site
Nov 25, 2025

About the victim

AI dossier — public-source company profile

Mitchell Silberberg & Knupp LLP (MSK) is a full-service law firm established in 1908, known for its work in entertainment, media, intellectual property, and venture-related legal services. The firm is headquartered in Los Angeles, California, with additional offices in New York and Washington D.C. It serves clients across the entertainment, technology, and business sectors.

Industry
Legal Services
Employees
51-200
Founded
1908

Attack summary

Severity: critical — A law firm of this profile handles highly sensitive, privileged client data including entertainment contracts, intellectual property filings, financial transactions, and confidential business matters. Confirmed data publication (disclosed status: data_published) of such privileged legal records constitutes a critical exposure of regulated and sensitive PII and confidential client information at scale.

SilentRansomGroup claims to have compromised Mitchell Silberberg & Knupp LLP and has published data as part of a disclosed leak, suggesting exfiltration of firm and/or client data. The post references venture and other legal service areas, implying potentially sensitive client and business records are at stake.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Client legal files
  • Venture/business transaction documents
  • Internal firm communications
  • Employee records
  • Financial records

What the group claims

Established in 1908, Mitchell Silberberg & Knupp (MSK), is a firm that provides services such as Ventu…

Source

Indexed 8 months ago

This page surfaces a public ransomware disclosure indexed by Darkfield. Original posts come from the operator's own leak site; we cross-check against ransomware.live, RansomLook and RansomWatch where applicable. Share this URL freely.

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Disclosure context

About SilentRansomGroup

Based on the limited available information, SilentRansomGroup is a relatively new ransomware operation that first emerged in May 2025, appearing to be financially motivated given their targeting patterns across multiple high-value sectors. The group's origin and affiliations remain unclear due to their recent emergence, though their diverse geographic targeting including the United States, Germany, Canada, and Russia suggests either a sophisticated operation or potential ransomware-as-a-service model. Their attack methodology and specific technical capabilities have not been extensively documented by major security researchers, though their targeting of business services, financial services, hospitality, and manufacturing sectors indicates they likely focus on organizations with both valuable data and ability to pay significant ransoms. With 93 known victims across multiple countries and sectors in a relatively short timeframe since May 2025, SilentRansomGroup has demonstrated notable activity levels, though specific high-profile campaigns or ransom amounts have not been publicly disclosed by CISA, FBI, or major threat intelligence firms. The group appears to remain active as of current reporting periods, though comprehensive technical analysis and attribution efforts by established security researchers are still developing given their recent emergence in the threat landscape. The group has been linked to 120 public disclosures across our corpus. First observed on a leak site on May 6, 2025; most recent post June 17, 2026. The operation is currently active.

Timeline of this disclosure

  • November 25, 2025MSK listed by SilentRansomGroupon the group's public leak site

Other recent disclosures by SilentRansomGroup

SilentRansomGroup has been linked to 120 public victims on Darkfield. A sample of the most recent:

See the full SilentRansomGroup dossier →

Sector and geography

Geographically, MSK is reported in Russia, a country with 63 ransomware disclosures in our corpus.

If your organisation is affected

A listing by SilentRansomGroup means MSK appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

  • Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
  • Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
  • Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
  • Monitor for the data appearing on SilentRansomGroup's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

How we know this. Darkfield monitors public ransomware leak sites continuously, archiving every new disclosure and the data later released against the victim. Each entry on this page is sourced from the operator's own publication and cross-checked against complementary OSINT feeds (RansomLook, ransomware.live, RansomWatch). We do not collect or host stolen data — only the metadata, timestamps and screenshots needed to make the public disclosure searchable and accountable. Records here are corrected when the original post is edited, retracted, or merged with another disclosure.