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gibGREINER

Claimed by Sarcoma · listed 1 year ago

52 GB
Data size
13m
Age
since listed · data leaked

Status timeline

  1. ListedJun 17, 2025
  2. Data leakeddate unknown

At a glance

Group
Sarcoma
Status
Data leaked
Country
Austria
Listed on leak site
Jun 17, 2025
Data size
52 GB

About the victim

AI dossier — public-source company profile

gibGREINER is a German engineering and construction project management firm that has undertaken major infrastructure projects, including central project control for the Verkehrsprojekte Deutsche Einheit (rail transport projects as part of German reunification infrastructure). The company manages large-scale, complex construction and civil engineering portfolios.

Industry
Engineering & Construction Project Management

Attack summary

Severity: medium — Confirmed exfiltration of 52 GB of engineering and project management data from a construction firm. Data involves infrastructure projects but no evidence of regulated PII, medical, financial, or government classified material at scale. The post is primarily descriptive rather than proof-rich.

The Sarcoma group claims to have exfiltrated 52 GB of data from gibGREINER. The post references project documentation related to major German infrastructure initiatives (Munich airport construction, rail transport projects) but does not explicitly state encryption or operational disruption.

medium

Data the group says was taken

AI dossier — extracted from the leak post
  • Project documentation
  • Engineering plans and specifications
  • Infrastructure project records
  • Project control and management files

What the group claims

gibGREINER Erfahren Sie mehr über das Projekt... Beim Neubau des Flughafens Franz-Josef Strauss in München handelte es sich um ein typisches Standortprojekt, bei welchem eine Vielzahl unterschiedlicher Einzelobjekte des Hoch-/Tief- und Ingenieurbaus in einen flchenmig geschlossenen Projektraum zur Abwicklung gelangten. Bei derartigen Projekten herrscht eine starke Abhngigkeit jedes einzelnen Objektes zum Projektraum, zum Teil basieren deren technische Systeme auf gemeinsamen Ver- und Entsorgungsnetzen. Erfahren Sie mehr über das Projekt... Die Verkehrsprojekte Deutsche Einheit (Schiene) wurden in einem groflchigen Projektgebiet umgesetzt. Die Baumanahmen wurden durch örtliche Projektzentren organisiert, das Zentrale Projektcontrolling wurde gibGREINER übertragen. Die einzelnen Bauabschnitte einer Strecke bildeten die Korridore, welche als Gesamtgewerke ausgeschrieben, beauftragt und abgerechnet wurden.Geo: Germany - Leak size: 52 GB Archive - Contains: Files

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

  • June 17, 2025gibGREINER listed by Sarcomaon the group's public leak site
Data size
52 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, gibGREINER is reported in Austria, a country with 84 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Sarcoma means gibGREINER 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.at (Austria), 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.