Was www.advancedentdenver.com hit by ransomware?

www.advancedentdenver.com was listed by the Lynx ransomware operation (United States), 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 Lynx ransomware group?

Lynx 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 www.advancedentdenver.com breach?

Lynx published data attributed to www.advancedentdenver.com. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Advanced ENT & Allergy Center

listed as www.advancedentdenver.com · Claimed by Lynx · listed 7 months ago

Age

since listed · data leaked

Status timeline

ListedDec 16, 2025
Data leakeddate unknown

At a glance

Group: Lynx
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Dec 16, 2025

About the victim

AI dossier — public-source company profile

Advanced ENT & Allergy Center is a Denver-area specialty medical practice based in Greenwood Village, Colorado, focused on ear, nose, throat, sinus, and allergy care. Operating for over 20 years, the center offers in-person and telehealth appointments, allergy testing, allergy drops, balloon sinuplasty, and other sinus treatments. The practice also runs a monthly free community care program for underserved and uninsured patients.

Industry: Specialty Medical Practice – Ear, Nose & Throat / Allergy
Address: 6110 Greenwood Plaza Blvd, Greenwood Village, CO 80111

Attack summary

Severity: critical — The victim is a healthcare provider subject to HIPAA; exfiltration of patient data constitutes a breach of regulated PHI at scale, and the data_published status confirms data has been released rather than merely threatened.

The Lynx ransomware group claims to have compromised Advanced ENT & Allergy Center and has published data (disclosed status: data_published), indicating exfiltration of data from a healthcare provider that handles patient medical and personal information. No ransom amount or specific data volume was stated in the post.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records
Personal health information (PHI)
Patient contact and demographic data
Insurance billing and payment records
Patient forms and intake documents

What the group claims

Advanced ENT & Allergy Center is a leading provider in Denver specializing in allergy and sinus treatments, offering both in-person and online appointments. With over 20 years of experience, they provide long-term solutions for sinus pain, congestion, and allergy symptoms. Their services include allergy testing, allergy drops, and various sinus treatments tailored to individual needs. The center is committed to community service, offering free medical care for underserved individuals once a month.

Sources

Source

Indexed 7 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 Lynx

Lynx is a relatively new ransomware group that emerged in July 2024, operating with apparent financial motivations and demonstrating rapid scaling capabilities with 397 documented victims within their first few months of operation. The group's origin and specific affiliations remain unclear due to their recent emergence, though their targeting patterns suggest a sophisticated operation that may operate independently rather than as a traditional Ransomware-as-a-Service model. Based on their victim distribution, Lynx appears to employ broad-spectrum targeting methodologies focusing heavily on English-speaking countries, with the United States, United Kingdom, Canada, Germany, and Australia representing their primary geographic targets, while concentrating their attacks on manufacturing, business services, technology, and transportation/logistics sectors, though specific technical details regarding their initial access vectors, encryption methods, and data exfiltration practices have not yet been extensively documented by major security research organizations. Due to the group's recent emergence, there are no widely reported major campaigns or high-profile incidents that have gained significant public attention from law enforcement agencies or established threat intelligence firms. As of late 2024, Lynx appears to remain active with no reported law enforcement disruptions or operational changes. The group has been linked to 414 public disclosures across our corpus. First observed on a leak site on July 29, 2024; most recent post June 18, 2026. The operation is currently active.

Timeline of this disclosure

December 16, 2025www.advancedentdenver.com listed by Lynxon the group's public leak site

Other recent disclosures by Lynx

Lynx has been linked to 414 public victims on Darkfield. A sample of the most recent:

See the full Lynx dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,600 disclosures indexed across all operators we track. Geographically, www.advancedentdenver.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Lynx means www.advancedentdenver.com 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 Lynx'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.