Was Thompson Dorfman Sweatman hit by ransomware?

Thompson Dorfman Sweatman was listed by the obscura ransomware operation (Canada), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the obscura ransomware group?

obscura is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the Thompson Dorfman Sweatman breach?

obscura published data attributed to Thompson Dorfman Sweatman (~250 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Thompson Dorfman Sweatman

Claimed by Obscura · listed 9 months ago

250 GB

Data size

$31.2K

Ransom

demanded

Age

since listed · data leaked

Status timeline

ListedOct 30, 2025
Data leakeddate unknown

At a glance

Group: Obscura
Status: Data leaked
Country: Canada
Sector: Business Services
Listed on leak site: Oct 30, 2025
Data size: 250 GB
Ransom demanded: $31.2K
Estimated revenue: $31.2

About the victim

AI dossier — public-source company profile

Thompson Dorfman Sweatman (TDS Law) is one of Manitoba's largest and longest-established full-service law firms, headquartered in Winnipeg, Canada. The firm provides legal services across corporate/commercial, litigation, real estate, employment, and other practice areas to business and individual clients throughout Manitoba and beyond. It operates additional offices in Brandon and other Manitoba locations.

Industry: Legal Services (Law Firm)
Address: 1700–242 Hargrave Street, Winnipeg, Manitoba, R3C 0V1, Canada
Employees: 51-200
Founded: 1896

Attack summary

Severity: critical — A law firm of this size and tenure almost certainly holds highly sensitive attorney-client privileged communications, regulated PII at scale, financial records, and confidential corporate transaction data. 250 GB of exfiltrated data from a major Canadian law firm constitutes a critical breach of regulated and privileged information affecting potentially thousands of clients.

The ransomware group Obscura claims to have exfiltrated approximately 250 GB of data from Thompson Dorfman Sweatman, with the disclosure status listed as 'data_published' and a countdown timer suggesting imminent or ongoing publication. The post references a revenue figure of $31.2K (likely the ransom demand) and indicates the stolen data is pending full release.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Client legal files and case documents
Confidential communications (attorney-client)
Corporate transaction records
Personal identifying information (PII) of clients
Financial records
Employee records

What the group claims

Revenue: $31.2kk | Leak Size: 250 GB | Status: Pending | Time Left: 8d 3h 57m 25s

Sources

Leak posthttp://obscurad3aphckihv7wptdxvdnl5emma6t3vikcf3c5oiiqndq6y6xad.onion/leaks/13

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.

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Disclosure context

About obscura

Obscura is a recently emerged ransomware group that was first observed in September 2025, operating with apparent financial motivations based on their targeting patterns across multiple sectors and geographic regions. The group has compromised at least 33 known victims since their emergence, demonstrating rapid operational capabilities despite their recent entry into the ransomware landscape. Limited public documentation exists regarding their country of origin, operational structure, or affiliations with established ransomware families, though their targeting pattern suggests either opportunistic attacks or access to diverse initial compromise vectors. Their victim profile spans multiple sectors including healthcare, technology, manufacturing, and construction, with geographic focus on the United States, Malaysia, Portugal, Egypt, and Denmark, indicating either broad targeting criteria or access to varied attack infrastructure across different regions. Due to the group's recent emergence and limited public reporting from major security vendors and law enforcement agencies, specific details regarding their technical capabilities, encryption methods, data exfiltration practices, or ransom demands remain undocumented in open-source intelligence. The group appears to remain active as of late 2025, though insufficient time has elapsed to determine their long-term operational sustainability or potential law enforcement attention. The group has been linked to 33 public disclosures across our corpus. First observed on a leak site on September 5, 2025; most recent post January 11, 2026. The operation is currently active.

Timeline of this disclosure

October 30, 2025Thompson Dorfman Sweatman listed by obscuraon the group's public leak site

Data size: 250 GB
Ransom demanded: $31.2K

Other recent disclosures by obscura

obscura has been linked to 33 public victims on Darkfield. A sample of the most recent:

See the full obscura dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Thompson Dorfman Sweatman is reported in Canada, a country with 1,055 ransomware disclosures in our corpus.

If your organisation is affected

A listing by obscura means Thompson Dorfman Sweatman 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 obscura'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.