Disclosure context

About m3rx

Based on the limited publicly available information, m3rx is an emerging ransomware group first observed in April 2026 with a relatively small victim count of eight organizations, suggesting they are either a newly formed operation or a smaller-scale criminal enterprise focused on financial gain. The group's origin and affiliations remain unclear, with no documented evidence from major security vendors or law enforcement agencies regarding their geographical base, operational structure, or whether they operate as an independent cell or as part of a larger ransomware-as-a-service ecosystem. Their attack methodology and specific technical capabilities have not been extensively documented by established threat intelligence sources, though their targeting pattern indicates a preference for English-speaking nations including Great Britain, Australia, and the United States, as well as operations in Switzerland and Italy, with victims spanning consumer services, business services, technology, and healthcare sectors. No major campaigns, high-profile victims, or significant ransoms have been publicly reported by CISA, FBI, Mandiant, or other reputable security researchers, likely due to the group's recent emergence and limited scope of operations. Given their recent first observation date and small victim count, m3rx appears to be in early operational stages with their current activity status and long-term viability remaining uncertain. The group has been linked to 19 public disclosures across our corpus. First observed on a leak site on April 29, 2026; most recent post May 17, 2026. The operation is currently active.

Timeline of this disclosure

April 29, 2026dmschweiz.ch listed by m3rxon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 2,640 disclosures indexed across all operators we track. Geographically, dmschweiz.ch is reported in CH, a country with 27 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

← All victims

DM Informatik

listed as dmschweiz.ch · Claimed by m3rx · listed 22 days ago

21d

Age

since listed · data leaked

Status timeline

Listed
Apr 29, 2026
Data leaked

At a glance

Group: m3rx
Status: Data leaked
Country: CH
Sector: Business Services
Listed on leak site: Apr 29, 2026

About the victim

AI dossier — public-source company profile

DM Informatik is a Swiss IT service provider based in Belp, canton of Bern, operating since 1983. The company offers hardware sales, network setup, software support, virus protection, data recovery, and cloud services to private and business customers. It operates a physical service point and provides on-site and remote IT support.

Industry: IT Services & Support (SMB/Consumer)
Address: Dorfstrasse 2, 3123 Belp, Switzerland
Founded: 1983

Attack summary

Severity: high — Confirmed exfiltration of 120 GB / 100k files from an IT services provider that handles client networks, hardware, and sensitive IT environments; data has been published. As an MSP-type firm, client data exposure risk is significant, though no explicit PII or regulated data categories are confirmed.

The m3rx group claims to have exfiltrated approximately 120 GB of data comprising around 100,000 files from DM Informatik, with the disclosure status marked as data_published, indicating the stolen data has been released.

high

Data the group says was taken

AI dossier — extracted from the leak post

120 GB of exfiltrated files
~100,000 files (nature unspecified)
Potentially customer IT environment data
Potentially business/operational documents

What the group claims

Sie haben im Katalog unsere Angebote von installierten und betriebsbereiten Gerten. Die Installationen können nach Ihren Wünschen angepasst werden. DM Standard-Installation ist optimiert und ohne Herstellerwerbung. Stolen: 120gb 100k files

The leak post

captured from the group's site

If you are interested in this data, please contact our support.Tox: 9A1217BEDA4AB77052A25D17CB6FFB34AFA2BE462E607F2FD8E1DF1DDD4CA16A64E18B1A0BF2

Sources

Victim sitedmschweiz.ch
Leak posthttp://4k6plf4h2cm2nco6ae3inrsxnmqgl6lllmwefydhnlcq4tuhwbj4qpad.onion

Source

Indexed 22 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.