Was Cybersecurity Vendor hit by ransomware?

Cybersecurity Vendor was listed by the Ransomhouse ransomware operation, 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 Ransomhouse ransomware group?

Ransomhouse 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 Cybersecurity Vendor breach?

Ransomhouse published data attributed to Cybersecurity Vendor. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Trellix

listed as Cybersecurity Vendor · Claimed by Ransomhouse · listed 3 months ago

Age

since listed · data leaked

Status timeline

ListedApr 28, 2026
Data leakeddate unknown

At a glance

Group: Ransomhouse
Status: Data leaked
Sector: Technology
Listed on leak site: Apr 28, 2026

About the victim

AI dossier — public-source company profile

Trellix is a global cybersecurity company formed from the October 2021 merger of McAfee Enterprise and FireEye. It provides an open and native extended detection and response (XDR) platform serving over 40,000–50,000 business and government customers worldwide and protecting more than 200 million endpoints. The company generates estimated annual revenue of $1.5–2 billion.

Industry: Cybersecurity / Extended Detection & Response (XDR)
Employees: 5000
Founded: 2021

Attack summary

Severity: high — The victim is a major cybersecurity vendor with government and enterprise customers globally; confirmed encryption of a $1.5–2B revenue company in the security sector represents significant operational and reputational impact. Data publication is threatened but not yet released, so critical-tier regulated-data exfiltration at scale is not yet confirmed.

RansomHouse claims to have encrypted Trellix systems on or around 17 April 2026; the post indicates data publication is 'NOT YET' but lists the action as 'Encrypted' with evidence held pending victim response.

high

Data the group says was taken

AI dossier — extracted from the leak post

Encrypted internal systems
Evidence files (unpublished)

Original description

AI-summarised, not from the leak post

N/A "Cybersecurity Vendor" is a generic descriptive term rather than the name of a specific company. Without a precise company name, it is not possible to provide accurate and reliable threat intelligence information. Please provide the exact registered company name for a proper assessment.

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":"438632"},{"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

Victim site*********.***
Leak posthttp://zohlm7ahjwegcedoz7lrdrti7bvpofymcayotp744qhx6gjmxbuo2yid.onion/cybersecurity.html

Source

Indexed 3 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 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 210 public disclosures across our corpus. First observed on a leak site on June 1, 2021; most recent post June 29, 2026. The operation is currently active.

Also tracked as: RANSOM HOUSE.

Timeline of this disclosure

April 28, 2026Cybersecurity Vendor listed by Ransomhouseon the group's public leak site

Other recent disclosures by Ransomhouse

Ransomhouse has been linked to 210 public victims on Darkfield. A sample of the most recent:

See the full Ransomhouse dossier →

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 3,549 disclosures indexed across all operators we track.

If your organisation is affected

A listing by Ransomhouse means Cybersecurity Vendor 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.
Monitor for the data appearing on Ransomhouse'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.