Was Wisper Reimer Ingenieure GmbH hit by ransomware?

Wisper Reimer Ingenieure GmbH was listed by the Sarcoma ransomware operation (Germany), 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 Sarcoma ransomware group?

Sarcoma 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 Wisper Reimer Ingenieure GmbH breach?

Sarcoma published data attributed to Wisper Reimer Ingenieure GmbH (~166 GB). Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Wisper Reimer Ingenieure GmbH

Claimed by Sarcoma · listed 1 year ago

166 GB

Data size

17m

Age

since listed · data leaked

Status timeline

ListedFeb 11, 2025
Data leakeddate unknown

At a glance

Group: Sarcoma
Status: Data leaked
Country: Germany
Listed on leak site: Feb 11, 2025
Data size: 166 GB

About the victim

AI dossier — public-source company profile

Wisper + Reimer Ingenieure GmbH is a German engineering firm formed in early 2023 through the merger of WTI (Wisper & Tietgen Ingenieure) and GEIT Reimer. They provide technical building equipment planning and design services, specializing in HVAC, sanitation, electrical, building automation, and energy-efficient systems for both new construction and existing building renovations. Operating from offices in Neumünster and Kropp, Germany.

Industry: Architectural, Engineering and Related Services - Building Systems Design
Address: Neumünster, Germany (primary office); Kropp, Germany (secondary office)
Employees: 51-200
Founded: 2023

Attack summary

Severity: high — Confirmed exfiltration of 166 GB spanning databases, email archives, and files. Engineering firm data likely includes proprietary project designs, client information, and business correspondence. No indication of personal data at massive scale, but operational and intellectual property impact is significant.

Sarcoma claims to have exfiltrated 166 GB of data from Wisper + Reimer Ingenieure, including files, SQL databases, and Exchange email archives. The group has published the data on their leak site.

high

Data the group says was taken

AI dossier — extracted from the leak post

Files (unspecified types)
SQL databases
Exchange email archives
Business records
Project documentation

What the group claims

Wisper Reimer Ingenieure GmbH Many different requirements for technical planning, which is geared towards people's comfort and safety, come together under one roof. With an experienced and future-oriented team, we are able to meet all of these planning requirements. We work across trades and thus enable you to receive the best possible planning and project support in the field of technical building equipment.Geo: architectural,engineering and related services - Leak size: 166 GB Archive - Contains: Files, SQL, Exchange

Sources

Victim sitewisper-reimer.de

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.

Is this your supplier? Your competitor? You?

Pro plans monitor your domain, corporate emails, and crypto wallets across every new ransomware leak-site post, breach dump and Telegram callout — alerts within 5 minutes.

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

February 11, 2025Wisper Reimer Ingenieure GmbH listed by Sarcomaon the group's public leak site

Data size: 166 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, Wisper Reimer Ingenieure GmbH is reported in Germany, a country with 926 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means Wisper Reimer Ingenieure GmbH 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.