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MECASEM

listed as mecasem.org · Claimed by Threeam · listed 5 hours ago

Today
Age
since listed · data leaked

Status timeline

  1. ListedAug 19, 2026
  2. Data leakeddate unknown

At a glance

Group
Threeam
Status
Data leaked
Country
Mexico
Listed on leak site
Aug 19, 2026

About the victim

AI dossier — public-source company profile

MECASEM is an ISO 17025 (COFRAC) accredited and EN 9100/ISO 9001 certified laboratory services provider specializing in non-destructive testing (NadCap accredited since 2012). The company operates eleven laboratories across France and Germany serving major industrial clients.

Industry
Non-Destructive Testing & Materials Analysis
Founded
2012

Attack summary

Severity: low — Only announcement/listing with no proof files, no data inventory disclosed, and no details on exfiltration or operational impact stated.

The ransomware group threeam claims to have compromised MECASEM. The leak post does not specify whether data was exfiltrated, encrypted, or both, nor does it detail what data categories are at risk.

low

What the group claims

The group gives quality and reliability the highest priority in the through execution of all its business activities. Therefore MECASEM provides a wide range of solutions ISO 17025 (COFRAC) accredited and EN 9100 and ISO 9001 certified. Since 2012

The leak post

captured from the group's site
The group gives quality and reliability the highest priority in the through execution of all its business activities. Therefore MECASEM provides a wide range of solutions ISO 17025 (COFRAC) accredited and EN 9100 and ISO 9001 certified. Since 2012, MECASEM has been accredited NadCap (Non-Destructive Testing). To assure a timely responsive service, our eleven laboratories are located in the heart of major industrial areas in France and Germany.

Sources

Source

Indexed 5 hours 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 Threeam

Threeam is a financially motivated ransomware group that emerged in September 2023, operating as a relatively new player in the ransomware ecosystem with 64 documented victims across multiple countries and sectors. The group's origin and potential affiliations remain unclear due to limited public documentation from major security agencies, though their targeting patterns suggest a broad opportunistic approach rather than nation-state backing. Based on available victim data, Threeam appears to employ common initial access vectors targeting organizations across business services, healthcare, manufacturing, and technology sectors, with the United States, United Kingdom, Australia, France, and Brazil representing their primary geographic focus areas. While specific technical details about their encryption methods and extortion tactics have not been extensively documented by major threat intelligence firms, their emergence in late 2023 and victim count suggests they have established operational capabilities within the competitive ransomware landscape. The group's current operational status remains active based on the recency of their emergence, though detailed law enforcement actions or disruption efforts have not been publicly reported by CISA, FBI, or other major security organizations. The group has been linked to 90 public disclosures across our corpus. First observed on a leak site on September 14, 2023; most recent post August 19, 2026. The operation is currently inactive.

Timeline of this disclosure

  • August 19, 2026mecasem.org listed by Threeamon the group's public leak site

Other recent disclosures by Threeam

Threeam has been linked to 90 public victims on Darkfield. A sample of the most recent:

See the full Threeam dossier →

Sector and geography

Geographically, mecasem.org is reported in Mexico, a country with 71 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Threeam means mecasem.org 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, CERT-MX (Mexico), as required for your jurisdiction.
  • Monitor for the data appearing on Threeam'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.