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

May 2, 2026TSYS listed by evereston the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Financial Services sector, which has 516 disclosures indexed across all operators we track. Geographically, TSYS is reported in US, a country with 2,713 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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TSYS

Claimed by everest · listed 19 days ago

19d

Age

since listed · data leaked

Status timeline

Listed
May 2, 2026
Data leaked

At a glance

Group: everest
Status: Data leaked
Country: US
Sector: Financial Services
Listed on leak site: May 2, 2026

About the victim

AI dossier — public-source company profile

TSYS (Total System Services) is a US-based payment solutions company headquartered in Columbus, Georgia, providing credit and debit card processing, merchant services, and payment management solutions to financial institutions, businesses, and consumers worldwide. It became a wholly-owned subsidiary of Global Payments Inc. following a merger completed in 2019. TSYS operates at significant global scale, serving thousands of financial institutions and merchants across multiple continents.

Industry: Payment Processing & Financial Technology
Address: One TSYS Way, Columbus, Georgia 31901, US
Employees: 10000+
Founded: 1983

Attack summary

Severity: critical — TSYS is a major payment processor handling sensitive financial data for thousands of financial institutions and merchants worldwide; confirmed data publication by the threat actor involving a regulated financial services entity at this scale constitutes a critical disclosure involving PII and financial data at scale.

The Everest ransomware group claims to have exfiltrated data from TSYS and has published the data ('data_published' status), though the specific volume and categories of data exfiltrated are not detailed in the truncated leak post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Financial institution client data
Payment processing records
Merchant services data
Internal business documents

Original description

AI-summarised, not from the leak post

TSYS, or Total System Services, is a US-based payment solutions company headquartered in Columbus, Georgia. It operates in the financial technology and payment processing industry, providing services such as credit and debit card processing, merchant services, and payment management solutions to financial institutions, businesses, and consumers worldwide. TSYS became a subsidiary of Global Payments following a merger in 2019.

The leak post

captured from the group's site

© 2026, All rights reserved
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Sources

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

Source

Indexed 19 days 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.