Was provencherroy.ca hit by ransomware?

provencherroy.ca was listed by the blackbasta 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 blackbasta ransomware group?

blackbasta 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 provencherroy.ca breach?

blackbasta published data attributed to provencherroy.ca. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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provencherroy.ca

Claimed by Blackbasta · listed 2 years ago

27m

Age

since listed · data leaked

Status timeline

ListedMay 4, 2024
Data leakeddate unknown

At a glance

Group: Blackbasta
Status: Data leaked
Country: Canada
Sector: Business Services
Listed on leak site: May 4, 2024

About the victim

AI dossier — public-source company profile

Provencher_Roy is a multidisciplinary architecture and design practice headquartered in Montréal, Canada. They offer services spanning architecture, interior design, urban design, and landscape architecture across corporate, institutional, cultural, healthcare, and residential sectors. The firm has been committed to sustainable design principles since 1983.

Industry: Architecture & Design Services
Address: 276 Saint-Jacques Street, Suite 700, Montréal, Québec H2Y 1N3, Canada
Founded: 1983

Attack summary

Severity: high — Confirmed exfiltration of 3TB+ including employee PII, HR/financial records, and proprietary design work (CAD/3D drawings). Sensitive employee personal documents and corporate financial data present elevated risk despite no evidence of active exploitation or publication of sample files in the excerpt provided.

BlackBasta claims to have exfiltrated approximately 3TB+ of data including active projects (2023-2024), CAD and 3D drawings, Ottawa-related data, corporate records (HR, finance), and personal employee documents.

high

Data the group says was taken

AI dossier — extracted from the leak post

Projects (2023, 2024)
CAD drawings
3D renderings
Ottawa project data
HR records
Financial records
Employee personal documents
Corporate data

What the group claims

Provencher_Roy is a multidisciplinary practice striving to create living spaces that are respectful of citizens and the built environment, through design solutions that are inclusive, meaningful, and sustainable.SITE: www.provencherroy.ca Address : 276 Saint-Jacques Street, Suite 700 Montréal (Québec) H2Y 1N3 CanadaTel# 514 844.3938ALL DATA SIZE: ~3tb+ 1. Projects (2023, 2024) 2. CAD, 3D Drawings 3. Ottawa data 4. Corporate data (HR, FINANCE…), Personal employees documents & etc…

Sources

Victim siteprovencherroy.ca
Leak posthttp://stniiomyjliimcgkvdszvgen3eaaoz55hreqqx6o77yvmpwt7gklffqd.onion/?id=DONOTCOPYLINK1

Source

Indexed 2 years 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 blackbasta

Black Basta is a highly sophisticated ransomware group that emerged in April 2022 and operates with a primary motivation of financial extortion, having rapidly established itself as one of the most prolific ransomware operations of the modern era with over 500 confirmed victims globally. The group is widely assessed by researchers including Mandiant and CISA to have likely ties to former members of the Conti ransomware syndicate following that group's dissolution in mid-2022, and operates as a private Ransomware-as-a-Service (RaaS) model with a closed affiliate structure rather than open recruitment, with suspected links to the FIN7 threat actor cluster based on observed tooling overlaps documented by SentinelOne and Microsoft. Black Basta employs a double extortion methodology, exfiltrating sensitive victim data prior to encryption and threatening publication on their Tor-based leak site "Basta News" to compound pressure on victims; initial access is predominantly achieved through phishing campaigns, purchase of stolen credentials, and exploitation of known vulnerabilities including QakBot malware distribution, with the group subsequently deploying tools such as Cobalt Strike, SystemBC, and their custom encryptor targeting both Windows and VMware ESXi environments using a ChaCha20 encryption algorithm. Per CISA and FBI joint advisory AA24-131A published in May 2024, the group has struck over 500 organizations across North America, Europe, and Australia, with high-profile victims including Ascension Health, Capita, the American Dental Association, and Rheinmetall, demonstrating a clear preference for manufacturing, business services, technology, transportation, and food production sectors across the United States, United Kingdom, Germany, Canada, and Italy. As of the time of available public reporting, Black Basta remained operationally active, though internal chat logs leaked in early 2025 revealed significant internal tensions and potential organizational fragmentation that security researchers assessed could impact the group's near-term operational cohesion. The group has been linked to 523 public disclosures across our corpus. First observed on a leak site on April 26, 2022; most recent post January 11, 2025. The operation is currently inactive.

Timeline of this disclosure

May 4, 2024provencherroy.ca listed by blackbastaon the group's public leak site

Other recent disclosures by blackbasta

blackbasta has been linked to 523 public victims on Darkfield. A sample of the most recent:

See the full blackbasta 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, provencherroy.ca is reported in Canada, a country with 316 ransomware disclosures in our corpus.

If your organisation is affected

A listing by blackbasta means provencherroy.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 blackbasta'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.