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 117 public disclosures across our corpus. First observed on a leak site on May 6, 2025; most recent post May 19, 2026. The operation is currently active.

Timeline of this disclosure

April 9, 2026Cox, Castle & Nicholson LLP listed by SilentRansomGroupon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, Cox, Castle & Nicholson LLP is reported in US, a country with 2,713 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

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Cox, Castle & Nicholson LLP

Claimed by SilentRansomGroup · listed 1 month ago

41d

Age

since listed · data leaked

Status timeline

Listed
Apr 9, 2026
Data leaked

At a glance

Group: SilentRansomGroup
Status: Data leaked
Country: US
Sector: Business Services
Listed on leak site: Apr 9, 2026

About the victim

AI dossier — public-source company profile

Cox, Castle & Nicholson LLP is a prominent California-based law firm specializing in real estate and land use law, construction, and related litigation and transactional services. The firm serves clients across the real estate development, finance, and construction industries with offices primarily in Los Angeles. It is considered one of the largest real estate-focused law firms in the western United States.

Industry: Legal Services – Real Estate Law
Address: 2029 Century Park East, Suite 2100, Los Angeles, CA 90067
Employees: 201-500
Founded: 1968

Attack summary

Severity: critical — The victim is a law firm handling sensitive real estate transactions and privileged legal communications; data_published status confirms exfiltration and public release of likely regulated PII and attorney-client privileged material at scale, representing a critical confidentiality breach for both the firm and its clients.

SilentRansomGroup claims to have exfiltrated data from Cox, Castle & Nicholson LLP and has published the data; the post indicates disclosed status of data_published, suggesting confidential legal and client records may have been exposed.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Client legal files
Real estate transaction documents
Privileged attorney-client communications
Employee records
Financial records
Contracts and agreements

What the group claims

Cox, Castle & Nicholson is a leading law firm specializing in real estate and related services, with o…

Source

Indexed 1 month 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.