Skip to main content
Darkfield

Ransomware victim disclosure

← All victims

Dulay and Dulay

listed as dulay.ca · Claimed by Medusalocker · listed 8 months ago

7m
Age
since listed · data leaked

Status timeline

  1. ListedNov 18, 2025
  2. Data leakeddate unknown

At a glance

Group
Medusalocker
Status
Data leaked
Country
Canada
Sector
Technology
Listed on leak site
Nov 18, 2025

About the victim

AI dossier — public-source company profile

Dulay and Dulay is a professional accounting firm based in Mississauga, Ontario, serving clients across the Greater Toronto Area and Canada. They provide accounting, assurance, tax advisory, and consulting services to diverse industries including healthcare, law, construction, and real estate.

Industry
Accounting & Tax Advisory Services
Address
Unit 5, 1332 Khalsa Drive, Mississauga, Ontario, Canada

Attack summary

Severity: high — Confirmed exfiltration of 500 GB of sensitive financial and tax data belonging to multiple clients across various regulated industries (healthcare, law firms, financial advisors). This constitutes significant exposure of regulated business and client PII at scale.

MedusaLocker claims to have exfiltrated approximately 500 GB of data from the firm. The group is offering the stolen data for sale at $40,000, suggesting both encryption and data exfiltration occurred.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Client financial records
  • Tax documents
  • Accounting files
  • Client portal data
  • Business correspondence

What the group claims

Price-$40000 (sale in one hand there are options for making a profit from these files will be included in the deal) 500Gb

Sources

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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

Disclosure context

About medusalocker

MedusaLocker is a ransomware operation first publicly documented around 2019, though the activity cluster reflected in this dataset shows observed campaigns beginning in November 2022, driven primarily by financial motivation with no known ideological or hacktivist agenda. The group is believed to operate out of or with ties to Eastern Europe, functioning as a Ransomware-as-a-Service model that allows affiliates to deploy the ransomware in exchange for a share of ransom proceeds, a structure documented in a joint advisory published by CISA, FBI, FinCEN, and HHS in June 2022. MedusaLocker actors typically gain initial access through phishing emails, exploitation of vulnerable Remote Desktop Protocol configurations, and compromised network devices, subsequently deploying the ransomware payload which encrypts victim files using AES-256 combined with RSA-2048 encryption while also exfiltrating sensitive data prior to encryption to enable double extortion pressure. Based on available telemetry, the group has claimed at least 67 known victims, with targeting concentrated heavily in the United States, United Kingdom, Brazil, France, and Israel, spanning sectors including business services, manufacturing, technology, and education, consistent with the opportunistic rather than highly selective targeting pattern characteristic of RaaS affiliate programs. As of the time of writing, MedusaLocker remains an active threat with no confirmed law enforcement disruption, takedown operation, or confirmed rebrand publicly attributed to the group by major intelligence or law enforcement agencies. The group has been linked to 78 public disclosures across our corpus. First observed on a leak site on November 15, 2022; most recent post July 7, 2026. The operation is currently active.

Timeline of this disclosure

  • November 18, 2025dulay.ca listed by medusalockeron the group's public leak site

Other recent disclosures by medusalocker

medusalocker has been linked to 78 public victims on Darkfield. A sample of the most recent:

See the full medusalocker dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track. Geographically, dulay.ca is reported in Canada, a country with 314 ransomware disclosures in our corpus.

If your organisation is affected

A listing by medusalocker means dulay.ca 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.
  • Report the incident to your national CERT, CCCS (Canada), as required for your jurisdiction.
  • Monitor for the data appearing on medusalocker'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.