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Allegis Group

Claimed by Everest · listed 10 months ago

10m
Age
since listed · data leaked

Status timeline

  1. ListedSep 9, 2025
  2. Data leakeddate unknown

At a glance

Group
Everest
Status
Data leaked
Country
United States
Sector
Business Services
Listed on leak site
Sep 9, 2025

About the victim

AI dossier — public-source company profile

Allegis Group is one of the largest privately held staffing and talent management companies in the United States, headquartered in Hanover, Maryland. The company operates multiple subsidiary brands providing professional staffing, recruiting, and workforce solutions across IT, engineering, finance, and other sectors globally. With tens of thousands of employees and billions in annual revenue, it serves a broad range of enterprise clients worldwide.

Industry
Staffing & Workforce Solutions
Employees
10001+
Founded
1983

Attack summary

Severity: high — Allegis Group is a major staffing firm holding large volumes of employee, candidate, and client PII. The disclosed status is 'data_published', confirming exfiltration and public release of data, which represents significant exposure of sensitive business and personal information at scale, though no specific regulated medical or government data is confirmed from the post alone.

The Everest ransomware group claims to have published data (status: data_published) obtained from Allegis Group, indicating exfiltration of company data; the leak post itself appears to be a general listing page for multiple victims with no specific data volume or file count cited for Allegis Group specifically.

high

Data the group says was taken

AI dossier — extracted from the leak post
  • Potentially internal HR and staffing records
  • Employee and candidate personal data (PII)
  • Client business data
  • Internal corporate databases

Original description

AI-summarised, not from the leak post

Allegis Group is a privately-held global talent solutions provider. The company offers a wide range of services, such as staffing and recruitment, workforce management, and talent advisory. Their expertise includes IT & communications, aerospace, biopharmaceuticals, energy, financial services, and more. Allegis was founded in 1983 and has its headquarters in Hanover, Maryland, USA.

The leak post

captured from the group's site
© 2026, All rights reserved
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Sources

Source

Indexed 10 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

  • September 9, 2025Allegis Group 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 Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, Allegis Group is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Everest means Allegis Group 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, CISA (United States), 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.