Was Flexmaster hit by ransomware?

Flexmaster was listed by the Storm 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 Storm ransomware group?

Storm 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 Flexmaster breach?

Storm published data attributed to Flexmaster. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Flexmaster

Claimed by Storm · listed 4 days ago

Age

since listed · data leaked

Status timeline

ListedSep 9, 2026
Data leakeddate unknown

At a glance

Group: Storm
Status: Data leaked
Country: Canada
Sector: Manufacturing
Listed on leak site: Sep 9, 2026

About the victim

AI dossier — public-source company profile

Flexmaster, part of the Novaflex Group, manufactures flexible ducting solutions including aluminum, stainless steel, and fabric ducting for the HVAC industry. The company is headquartered in Richmond Hill, Ontario, Canada, and employs 201–500 people. They supply accessories, insulation products, and specialized systems such as gasketed ducts and fume vent solutions.

Industry: HVAC Ducting & Flexible Systems Manufacturing
Address: 20 East Pearce Street, Richmond Hill, ON L4B 1B7, Canada
Employees: 201-500

Attack summary

Severity: low — The leak post contains only a company description and no specifics about the attack method, data exfiltrated, or proof files. No operational impact is stated. Without evidence of data publication or proof artifacts, this appears to be a listing announcement only.

Storm claims to have attacked Flexmaster and published data. The leak post does not specify whether data was exfiltrated, encrypted, or both, nor does it detail what categories of data are at stake.

low

What the group claims

Flexmaster, part of the Novaflex Group, specializes in a wide range of flexible ducting solutions including aluminum, stainless steel, and fabric ducting. Their product offerings also include innovative systems like the Platinum Flow gasketed duct and fume vent solutions. The company caters to various clients in the HVAC industry, providing essential accessories and insulation products. Flexmaster is committed to delivering high-quality, reliable ducting systems for diverse applications. The company headquarters is located in 20 East Pearce Street, Richmond Hill, ON L4B 1B7, Canada. 201-500 Employees

Sources

Leak posthttp://yqhecvqtdvq6p7duqcgw2qca77spbgakxcoibtx6zpvfshltsbbbhfqd.onion/company/6a9f239a4cc2b2e7e76b5aa3

Source

Indexed 4 days 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 Storm

Storm is a ransomware group first observed in August 2026, operating with an apparent financial motivation based on its targeting profile, though limited public documentation exists given its recent emergence and relatively small victim footprint. The group has claimed or been attributed to attacks against at least six known victims, with the United States representing its primary target geography. Storm has demonstrated a preference for targeting the healthcare and manufacturing sectors, alongside a broader category of other industries, suggesting an opportunistic rather than highly specialized targeting philosophy. Due to the group's recent emergence and limited victim count, comprehensive technical details regarding its initial access vectors, encryption methodology, tooling, or affiliation with known threat actor ecosystems have not yet been formally documented by CISA, the FBI, Mandiant, or other major threat intelligence publishers as of the time of this writing. No confirmed RaaS infrastructure, dark web leak site activity, or law enforcement actions against the group have been publicly attributed or reported in open sources. Given its nascent operational timeline beginning in 2026, Storm should be monitored as an emerging threat, particularly within the healthcare sector where ransomware attacks carry significant operational and patient safety implications, but analysts should treat any further characterization beyond the known victim and targeting data with caution pending additional corroborating intelligence. The group has been linked to 53 public disclosures across our corpus. First observed on a leak site on August 7, 2026; most recent post September 9, 2026. The operation is currently active.

Timeline of this disclosure

September 9, 2026Flexmaster listed by Storm on the group's public leak site

Other recent disclosures by Storm

Storm has been linked to 53 public victims on Darkfield. A sample of the most recent:

See the full Storm dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,696 disclosures indexed across all operators we track. Geographically, Flexmaster is reported in Canada, a country with 320 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Storm means Flexmaster 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 Storm'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.