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Elmos

Claimed by Sarcoma · listed 1 year ago

186 GB
Data size
15m
Age
since listed · data leaked

Status timeline

  1. ListedMar 26, 2025
  2. Data leakeddate unknown

At a glance

Group
Sarcoma
Status
Data leaked
Country
Germany
Listed on leak site
Mar 26, 2025
Data size
186 GB

About the victim

AI dossier — public-source company profile

Elmos is an IT-focused company based in Belgium that emphasizes service quality and employee/customer satisfaction. The organization positions itself as people-centric with a five-star service model.

Industry
Information Technology Services

Attack summary

Severity: high — Confirmed exfiltration of significant data volume (186 GB) including structured database content (SQL), with published data. Database exfiltration suggests potential access to customer/employee PII and business records.

Sarcoma group claims to have exfiltrated 186 GB of data including files and SQL databases from Elmos. The group has published the data on their leak site.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • SQL databases
  • Files (unspecified)

What the group claims

Elmos Elmos is fascinated by IT and passionate about people. This is reflected in a five-star service for our employees and our customers. What drives us, who do we match with and who do we welcome to our Elmos family? Let's connect!Geo: Belgium - Leak size: 186 GB Archive - Contains: Files, SQL

Source

Indexed 1 year 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 Sarcoma

Sarcoma is a relatively new ransomware group that emerged in October 2024, operating with apparent financial motivations and demonstrating a broad international targeting approach with at least 140 documented victims across multiple countries and industry sectors. The group's origin and affiliations remain unclear due to its recent emergence, with no publicly documented connections to established ransomware families or confirmation of whether they operate as an independent entity or through a Ransomware-as-a-Service model. Limited public information is available regarding Sarcoma's specific attack methodologies, initial access vectors, or technical capabilities, though their targeting patterns suggest opportunistic rather than highly selective victim selection across diverse industries including manufacturing, business services, agriculture and food production, and technology sectors. The group has shown a particular focus on victims in the United States while also maintaining operations against targets in Italy, Canada, Germany, and Australia, though no specific high-profile attacks or record ransom demands have been publicly documented by major security firms or law enforcement agencies. Given the group's recent emergence in late 2024, Sarcoma appears to remain active with no reported law enforcement disruptions or confirmed rebranding activities at this time. The group has been linked to 150 public disclosures across our corpus. First observed on a leak site on October 9, 2024; most recent post May 12, 2026. The operation is currently active.

Also tracked as: Sarcoma Ransomware Group.

Timeline of this disclosure

  • March 26, 2025Elmos listed by Sarcomaon the group's public leak site
Data size
186 GB

Other recent disclosures by Sarcoma

Sarcoma has been linked to 150 public victims on Darkfield. A sample of the most recent:

See the full Sarcoma dossier →

Sector and geography

Geographically, Elmos is reported in Germany, a country with 926 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Elmos 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-Bund (Germany), as required for your jurisdiction.
  • Monitor for the data appearing on Sarcoma'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.