Disclosure context

About cephalus

Based on available public information, Cephalus is a recently emerged ransomware group first observed in August 2025, operating with apparent financial motivations targeting organizations primarily across the United States, United Kingdom, Netherlands, and Ireland. The group has claimed 19 victims since emergence, with no publicly documented country of origin or confirmed affiliations to established ransomware families or RaaS operations by major security researchers or government agencies. Their attack methodology and specific technical capabilities remain largely undocumented in public threat intelligence reporting, though their targeting pattern shows focus on healthcare, business services, financial services, and manufacturing sectors alongside organizations of undetermined industry classification. No major high-profile campaigns, record ransom demands, or law enforcement disruption actions have been publicly reported by CISA, FBI, or established security research firms at this time. The group appears to remain active as of current reporting, though the limited public documentation suggests either highly targeted operations or insufficient analysis coverage by major threat intelligence organizations. The group has been linked to 19 public disclosures across our corpus. First observed on a leak site on August 26, 2025; most recent post August 29, 2025. The operation is currently inactive.

Timeline of this disclosure

August 26, 2025Lee & Associates listed by cephaluson the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Lee & Associates is reported in United States, a country with 7,392 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

← All victims

Lee & Associates - Irvine

listed as Lee & Associates · Claimed by cephalus · listed 9 months ago

Age

since listed · data leaked

Status timeline

Listed
Aug 26, 2025
Data leaked

At a glance

Group: cephalus
Status: Data leaked
Country: United States
Sector: Not Found
Listed on leak site: Aug 26, 2025

About the victim

AI dossier — public-source company profile

Lee & Associates - Irvine is a commercial real estate brokerage firm based in Irvine, California, originally the founding office of the Lee & Associates network established in 1979. The firm specializes in industrial, office, medical, retail, and investment properties across South Orange County and broader Southern California. Lee & Associates as a whole operates 64 locations across the United States and Canada.

Industry: Commercial Real Estate Brokerage
Address: Irvine, California, United States
Founded: 1979

Attack summary

Severity: high — The group claims to have published exfiltrated data at terabyte scale from a commercial real estate firm, which would likely include sensitive client PII, financial transaction records, and proprietary business data; the 'data_published' status confirms exfiltration and public release.

The ransomware group Cephalus claims to have exfiltrated data from Lee & Associates - Irvine, with the post indicating a data leak disclosure. The volume of stolen data is described as terabytes (TB), though no specific ransom amount or further detail about the data contents was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Unspecified business data (terabytes)
Potentially client/transaction records
Potentially broker and employee information

What the group claims

Lee & Associates DATA LEAK | (TB)

Sources

Victim sitelee-irvine.com
Leak posthttps://darkforums.st/Thread-Lee-Associates-DATA-LEAK-TB

Source

Indexed 9 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.