Disclosure context

About Ransomhouse

Ransomhouse is a ransomware group that emerged in June 2021, operating primarily for financial gain through extortion campaigns targeting organizations across multiple sectors globally. The group's origin and specific affiliations remain unclear based on publicly available intelligence, though their operational patterns suggest they function as an independent cybercriminal organization rather than a traditional ransomware-as-a-service model. Ransomhouse employs double extortion tactics, stealing sensitive data before deploying their ransomware payload and threatening to publish the information on their leak site if victims refuse to pay the demanded ransom. The group has demonstrated a broad targeting approach, with documented attacks against 187 victims primarily concentrated in the United States, China, United Kingdom, Italy, and Spain, focusing heavily on healthcare, technology, business services, and manufacturing sectors. While specific high-profile campaigns have not been extensively documented by major security firms, the group's consistent victim count and geographic distribution indicate sustained operational capability since their emergence. As of current reporting, Ransomhouse remains active with no known major law enforcement disruptions or confirmed rebranding efforts. The group has been linked to 202 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post May 8, 2026. The operation is currently active.

Timeline of this disclosure

December 3, 2025Armis Group listed by Ransomhouseon the group's public leak site

Data size: 743 GB
Ransom demanded: $740

Sector and geography

This disclosure adds to ransomware activity in the Not Found sector, which has 4,859 disclosures indexed across all operators we track. Geographically, Armis Group is reported in Portugal, a country with 11 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

← All victims

Armis Group

Claimed by Ransomhouse · listed 6 months ago

743 GB

Data size

$740

Ransom

demanded

Age

since listed · data leaked

Status timeline

Listed
Dec 3, 2025
Data leaked

At a glance

Group: Ransomhouse
Status: Data leaked
Country: Portugal
Sector: Not Found
Listed on leak site: Dec 3, 2025
Data size: 743 GB
Ransom demanded: $740

About the victim

AI dossier — public-source company profile

Armis Group (www.armisgroup.com) is a company based in Portugal. The public site excerpt provided contains only CSS/styling code and yields no substantive information about the company's operations, size, or sector. No additional details could be inferred from the leak post, which does not contain an entry specifically describing Armis Group.

Attack summary

Severity: high — 743 GB of data is claimed to have been exfiltrated and published, representing a significant confirmed data exfiltration event, though the specific sensitivity of the data contents cannot be determined from available evidence.

RansomHouse claims to have encrypted systems and exfiltrated approximately 743 GB of data from Armis Group. The disclosure status is listed as 'data_published', indicating the group asserts the stolen data has been released.

high

Data the group says was taken

AI dossier — extracted from the leak post

743 GB of exfiltrated data

What the group claims

Armis Group creates smart digital tools that make life easier for different industries. They build computer systems that help transportation companies, sports organizations, banks, government offices, and factories work better and faster.

The leak post

captured from the group's site

```
{"data":[{"id":"a1894b76b7004c75a3a0845799af49956592e3d9","display":"animated","header":"HOT NEWS","info":" Trellix is a global cybersecurity company.","url":"","sort":1,"views":"436242"},{"id":"336b257f582b17573c97578efd4b22762bf77344","sort":2,"header":"Trellix (McAfee & FireEye)","url":"https://www.trellix.com/","private":"false","revenue":"1.5-2 B$","employees":"5000","info":"Trellix is a global cybersecurity company formed from the October 2021 merger of McAfee Enterprise and FireEye. It provides services to over 50,000 business and government customers worldwide, protecting more than 200 million endpoints. The companys open and native extended detection and response (XDR) platform helps organizations confronted by todays most advanced threats gain confidence in the protection and resilience of their operations. Trellix, along with an extensive partner ecosystem, accelerates technology innovation through machine learning and automation to empower over 40,000 business and government customers with living security","statusDate":"DEPENDS ON YOU","status":"EVIDENCE","published":"NOT YET","action":"Encrypted","actionDate":"17/04/2026","volume":"~","content":"cybersecurity.html"…

Sources

Source

Indexed 6 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.