Was SIAD hit by ransomware?

SIAD was listed by the Everest ransomware operation (Italy), 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 Everest ransomware group?

Everest 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 SIAD breach?

Everest published data attributed to SIAD. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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SIAD S.p.A.

listed as SIAD · Claimed by Everest · listed 8 months ago

Age

since listed · data leaked

Status timeline

ListedNov 10, 2025
Data leakeddate unknown

At a glance

Group: Everest
Status: Data leaked
Country: Italy
Sector: Manufacturing
Listed on leak site: Nov 10, 2025

About the victim

AI dossier — public-source company profile

SIAD (Società Italiana Acetilene e Derivati) is an Italian company operating in the industrial gases sector, producing and distributing gases such as oxygen, nitrogen, argon, acetylene, and carbon dioxide, along with related engineering and plant services. The company is headquartered in Bergamo, Italy, and operates across multiple business units including gas production, biomedical, and engineering. It is a well-established mid-to-large industrial group with operations across Europe.

Industry: Industrial Gases & Engineering

Attack summary

Severity: high — The disclosure status is listed as data_published, indicating actual data has been released publicly by the threat actor. Even without detailed inventory, confirmed publication of data from an industrial manufacturing company of this scale warrants a high severity rating.

The Everest ransomware group claims an attack on SIAD and has listed the disclosure status as data_published, indicating data exfiltration and/or publication of stolen data. The leak post itself contains minimal detail due to truncation, and no specific data categories or ransom amount were stated.

high

Original description

AI-summarised, not from the leak post

SIAD is a leading international group operating in the production and sale of industrial and medical gases, engineering, healthcare, and training services. Founded in 1927 in Italy, the company develops, produces, and supplies a range of gases including oxygen, nitrogen, argon, carbon dioxide and hydrogen. SIAD also offers medical gases for healthcare industries, gas equipment, and systems for gas production and treatment.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

Leak posthttp://ransomocmou6mnbquqz44ewosbkjk3o5qjsl3orawojexfook2j7esad.onion/news/SIAD/

Source

Indexed 8 months 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 Everest

Everest is a financially-motivated ransomware group that emerged in September 2021, operating with a focus on profit-driven extortion campaigns against organizations primarily in the United States and Europe. The group's country of origin and specific affiliations remain undocumented in public threat intelligence reporting, though their operational patterns suggest they likely operate as an independent entity rather than a formal ransomware-as-a-service model. Limited public documentation exists regarding Everest's specific attack methodologies, initial access vectors, or technical capabilities, though their victim profile indicates they employ standard ransomware tactics targeting a diverse range of sectors including healthcare, technology, business services, and manufacturing organizations. Since their emergence, Everest has claimed responsibility for attacks against 339 victims across multiple countries, with the United States, United Kingdom, Italy, Germany, and Spain representing their primary geographic targets, though no specific high-profile incidents or major ransoms have been publicly documented by law enforcement or major security firms. As of current reporting, Everest appears to remain an active threat actor, though the limited public intelligence available suggests they operate as a lower-tier ransomware group compared to more prominent and well-documented criminal organizations. The group has been linked to 369 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 29, 2026. The operation is currently active.

Timeline of this disclosure

November 10, 2025SIAD listed by Evereston the group's public leak site

Other recent disclosures by Everest

Everest has been linked to 369 public victims on Darkfield. A sample of the most recent:

See the full Everest dossier →

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 3,681 disclosures indexed across all operators we track. Geographically, SIAD is reported in Italy, a country with 635 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Everest means SIAD 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, CSIRT Italia (Italy), as required for your jurisdiction.
Monitor for the data appearing on Everest'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.