Was Mesan USA hit by ransomware?

Mesan USA was listed by the Global Secret Group ransomware operation (United States), 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 Global Secret Group ransomware group?

Global Secret Group 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 Mesan USA breach?

Global Secret Group published data attributed to Mesan USA. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Mesan USA

Claimed by Global Secret Group · listed 3 days ago

Age

since listed · data leaked

Status timeline

ListedSep 9, 2026
Data leakeddate unknown

At a glance

Group: Global Secret Group
Status: Data leaked
Country: United States
Listed on leak site: Sep 9, 2026

About the victim

AI dossier — public-source company profile

MESAN USA is a Miami-based manufacturer and distributor of evaporative cooling towers and HVLS fans serving North American markets. The company operates as the Americas division of MESAN, an international cooling equipment manufacturer with ISO-9001 and CTI-STD-201 certifications. Products include cross-flow towers, closed-circuit coolers, and low-noise fans designed for LEED-compliant, energy-efficient cooling applications.

Industry: Industrial Machinery & Equipment — Evaporative Cooling Towers
Address: Miami, Florida 33166, US
Employees: 10-20

Attack summary

Severity: medium — Large data volume (184 GB) with confirmed exfiltration and public disclosure, but no evidence of regulated PII, financial records, or operational disruption. Industrial equipment manufacturer with modest employee count (10–20) and no indication of sensitive data categories in the post.

Global Secret Group claims to have exfiltrated 184 GB of company data (188,562 files across 26,169 folders) from MESAN USA. The leak post provides no explicit detail on the type of data compromised or whether encryption occurred.

medium

Data the group says was taken

AI dossier — extracted from the leak post

company files and documents
business records

What the group claims

The leak post

captured from the group's site

Country: Miami, Florida 33166, US | Website: mesanusa.com | Revenue: $5.4 Million | Industry: Industrial Machinery & Equipment, Manufacturing | Employees: 10-20 | Properties: 184 GB (188,562 Files, 26,169 Folders)
Guangzhous International Finance Center or IFC Tower, one of the worlds 10 tallest buildings, uses MESAN cooling towers A total of 12,700 tons of air conditioning, are reliably and dependably provided by MESAN towers, as a testimony to our excellence in quality, design and, manufacturing. Read More Small details make a big difference... Attention to detail, focus on perfection, refinement in the design of small components, to ensure reliability and long trouble-free service life, are at the core of MESANs business philosophy. We believe that The whole is greater than the sum of its parts Read More MESANs focus on engineering, research and development, quality management and excellent customer service, has been recognized by such important international organizations such as ISO, which awarded the ISO-9001-2008 certificate, and CTI, which issued the CTI-STD-201 performance certification. All these attributes make a powerful combination that drives the MESAN brand up, on a …

Sources

Victim sitemesanusa.com
Leak posthttp://o5lsqyar7ox25z734k6zaxt2vf7bsyi4q5rturi5iyxzqo3ica7bjsad.onion/project/SyR7gg8M68RCbyjA/

Source

Indexed 3 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 Global Secret Group

Global Secret Group is a ransomware threat actor first observed in July 2026, with operations consistent with financially motivated cybercrime based on their targeting profile and victim patterns. The group has claimed or been attributed to 28 known victims across a relatively short operational window, suggesting an emerging or actively expanding operation. Given the limited public documentation available from CISA, FBI, Mandiant, or other reputable security research organizations at this time, a comprehensive technical profile cannot be fully established. What is known from available victim and targeting data indicates the group predominantly focuses on organizations in the United States, Canada, Brazil, the United Kingdom, and Cyprus, with a clear sectoral preference for Technology, Retail and E-Commerce, Energy and Utilities, Professional Services, and Financial Services — a targeting pattern broadly consistent with financially motivated ransomware actors seeking high-value data and organizations with both the ability and incentive to pay ransoms. The cross-sector and multi-national targeting pattern may suggest opportunistic intrusion methodology rather than a narrowly scoped, nation-state-aligned operation, though this assessment remains preliminary pending further public disclosure by authoritative sources. As of the time of this writing, Global Secret Group's operational infrastructure, affiliation with any ransomware-as-a-service ecosystem, specific malware tooling, and current active status have not been formally attributed or publicly documented by major threat intelligence authorities, and this profile will require revision as additional intelligence becomes available. The group has been linked to 46 public disclosures across our corpus. First observed on a leak site on July 26, 2026; most recent post September 10, 2026. The operation is currently active.

Also tracked as: GlobalSecretGroup.

Timeline of this disclosure

September 9, 2026Mesan USA listed by Global Secret Group on the group's public leak site

Other recent disclosures by Global Secret Group

Global Secret Group has been linked to 46 public victims on Darkfield. A sample of the most recent:

See the full Global Secret Group dossier →

Sector and geography

Geographically, Mesan USA is reported in United States, a country with 3,165 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Global Secret Group means Mesan USA 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, CISA (United States), as required for your jurisdiction.
Monitor for the data appearing on Global Secret Group'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.