Disclosure context

About anubis

Anubis is a recently emerged ransomware group that began operations in February 2025, primarily motivated by financial gain through encryption and extortion attacks. The group has demonstrated rapid expansion, accumulating 65 documented victims within a short operational timeframe. Given the group's recent emergence, limited information is publicly available regarding their specific country of origin, organizational structure, or confirmed affiliations with other cybercriminal entities, though their operational patterns suggest they may operate as an independent group or small-scale ransomware-as-a-service operation. Their attack methodology appears to focus on opportunistic targeting across multiple geographic regions, with victims concentrated primarily in the United States, Australia, Canada, the United Kingdom, and France, indicating either English-language proficiency or the use of automated tools that facilitate cross-border operations. The group demonstrates a clear preference for targeting healthcare organizations and manufacturing companies, followed by business services and technology sectors, suggesting they prioritize organizations with critical operational dependencies that may be more likely to pay ransoms quickly. Due to the group's recent emergence in early 2025, there is insufficient publicly documented information from established cybersecurity firms or law enforcement agencies regarding their specific technical capabilities, encryption methods, or whether they employ double or triple extortion tactics involving data theft and leak sites. As of current reporting, Anubis remains an active threat with continued victim acquisition, though the full scope of their capabilities and long-term operational sustainability remains to be determined as security researchers continue to analyze their activities. The group has been linked to 77 public disclosures across our corpus. First observed on a leak site on February 25, 2025; most recent post May 13, 2026. The operation is currently active.

Timeline of this disclosure

March 27, 2026Schlam Stone & Dolan LLP listed by anubison the group's public leak site

Data size: 256 GB
Records: 375823 files

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, Schlam Stone & Dolan LLP 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

Marnell Financial Services

listed as Schlam Stone & Dolan LLP · Claimed by anubis · listed 2 months ago

256 GB

Data size

375823 files records

54d

Age

since listed · data leaked

Status timeline

Listed
Mar 27, 2026
Data leaked

At a glance

Group: anubis
Status: Data leaked
Country: United States
Sector: Business Services
Listed on leak site: Mar 27, 2026
Data size: 256 GB
Records: 375823 files

About the victim

AI dossier — public-source company profile

Marnell Financial Services, Ltd. specializes in providing comprehensive solutions for income taxes, investments, and small business support services. The company develops tailored financial strategies for individuals and small business owners through consultations and client service. It operates in the financial advisory and tax services sector, catering primarily to personal and small business clients.

Industry: Financial Services & Tax Advisory

Attack summary

Severity: critical — Confirmed exfiltration and publication of regulated financial data including client tax documents and banking records constitutes a critical breach of sensitive PII and financial information at a firm handling third-party client finances.

The Anubis group claims to have exfiltrated financial data belonging to Marnell Financial Services and its clients, including tax documents, financial reports, and banking records. The data has been published ('data_published' status), indicating confirmed exfiltration without apparent encryption noted.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Tax documents
Financial reports
Banking records
Client financial data

What the group claims

Data breach at a law firm representing clients ranging from government institutions to Fortune 500 companies.

The leak post

captured from the group's site

Anubis blog ANUBIS NEWS FAQ ABOUT RULES English English Español Русский 中文 Deutsch Download Marnell Financial Services Marnell Financial Services, Ltd . specializes in providing comprehensive solutions for income taxes, investments, and small business support services. The company focuses on developing tailored strategies to help clients achieve their financial goals through thorough consultations and superior client service. They cater to individuals and small business owners, addressing various financial questions and challenges, particularly in today's economic The subject of today’s article is a small financial company. It is not the first of its kind in our blog, and the contents of this breach are fairly typical. We could once again speculate about who is to blame, or emphasize that companies operating in sectors such as finance, legal services, and healthcare should pay particular attention to data security. However, this time we will simply present the breach without unnecessary dramatization. Given the company’s line of business, the data involved is, unsurprisingly, financial in nature. You will find it in the form of tax documents, reports, and various banking records re…

Screenshot of the leak post

Leak screenshot for Schlam Stone & Dolan LLP

Sources

Leak posthttp://om6q4a6cyipxvt7ioudxt24cw4oqu4yodmqzl25mqd2hgllymrgu4aqd.onion/r/26XYDvSlEdcotLH1sNZE3Y7tz7Sf3ZoQz7aCECJoY8NCcpOaHcJBBm7tQgszFjd7fBinAv97fWtbPaRSOBGlERVlEUGlB

Source

Indexed 2 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.