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 360 public disclosures across our corpus. First observed on a leak site on September 9, 2021; most recent post May 7, 2026. The operation is currently active.

Timeline of this disclosure

February 2, 2026Iron Mountain listed by Evereston 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, Iron Mountain is reported in United States, a country with 7,392 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

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Iron Mountain

Claimed by Everest · listed 4 months ago

Age

since listed · data leaked

Status timeline

Listed
Feb 2, 2026
Data leaked

At a glance

Group: Everest
Status: Data leaked
Country: United States
Sector: Business Services
Listed on leak site: Feb 2, 2026

About the victim

AI dossier — public-source company profile

Iron Mountain Incorporated is a global provider of records management, data management, and information destruction services headquartered in Boston, Massachusetts. The company serves more than 225,000 customers across over 60 countries, storing and managing physical and digital assets including documents, backup tapes, and other critical business information. It operates thousands of secure storage facilities worldwide and is listed on the New York Stock Exchange.

Industry: Records Management & Data Storage Services
Address: 1 Federal Street, Boston, MA 02110, United States
Employees: 24000
Founded: 1951

Attack summary

Severity: high — Iron Mountain manages highly sensitive records and data for tens of thousands of enterprise and government clients globally; confirmed publication of exfiltrated data from such a custodian carries significant downstream risk for those clients' regulated and sensitive information, even though the specific data contents are not enumerated in the post.

The Everest ransomware group claims an attack against Iron Mountain and has listed the incident as data_published, indicating exfiltration and publication of data; however, the leaked post excerpt contains no specific detail on the volume, nature of data stolen, or proof files advertised.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate records
Client data
Business documents

Original description

AI-summarised, not from the leak post

Iron Mountain Incorporated is a global business specializing in storage and information management services. Founded in 1951, based in Boston, Massachusetts, it helps organizations to store, manage, protect, retrieve information and data. Its offerings include records and information management, data backup and recovery, secure shredding, and data centers.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

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

Source

Indexed 4 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.