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ENT & Allergy Associates

listed as entandallergy.com · Claimed by Abyss · listed 1 year ago

29 GB
Data size
$50
Ransom
demanded
15m
Age
since listed · data leaked

Status timeline

  1. ListedMar 28, 2025
  2. Data leakeddate unknown

At a glance

Group
Abyss
Status
Data leaked
Country
United States
Sector
Healthcare
Listed on leak site
Mar 28, 2025
Data size
29 GB
Ransom demanded
$50

About the victim

AI dossier — public-source company profile

ENT & Allergy Associates is a multi-state healthcare provider specializing in ear, nose, throat, allergy, and audiology services. With headquarters in Tarrytown, New York, the company operates 80 office locations across New York, New Jersey, Pennsylvania, and Texas, serving approximately 175,000 patients monthly through a network of over 450 clinicians and 1,600 staff members.

Industry
Healthcare: Ear, Nose & Throat (ENT) and Allergy Services
Address
Tarrytown, New York (headquarters); 80 office locations across New York, New Jersey, Pennsylvania, and Texas
Employees
451-500

Attack summary

Severity: critical — Confirmed exfiltration of large-scale healthcare data (139 GB) from a clinical provider with multi-state operations. The data likely includes patient protected health information (PHI), medical records, and personal identifying information affecting approximately 175,000+ patients served monthly. This falls under regulated healthcare data subject to HIPAA and poses significant privacy and identity theft risks.

The Abyss ransomware group claims to have exfiltrated 139 GB of uncompressed data from ENT & Allergy Associates' systems. The group has published download links and password-protected archives to their dark web leak site.

critical

Data the group says was taken

AI dossier — extracted from the leak post
  • Patient medical records
  • Personal health information (PHI)
  • Patient contact information
  • Insurance and billing records
  • Clinical documentation

What the group claims

ENT and Allergy Associates is an ear, nose, and throat specialist clinic, with locations throughout Southeast New York and Northern New Jersey. Their headquarters is in Tarrytown, New York.

The leak post

captured from the group's site
```
let data = [
{
        'title' : 'thinlinetech.com',
        'short' : 'thinlinetech.com 29Gb uncompressed data',
        'full' : 'Thinline Technologies <br>' +
                 'Thinline Technologies offers reliable IT consulting and expert computer and network support services to businesses in the Baltimore metro area.<br> They specialize in network administration, technology planning, and help desk services, focusing on increasing productivity and profitability for small to mid-size businesses.<br>'+
            'password: 6oGfyIRISQmmI3Ge2kEeyu7hbzONONEFpkcnhC1S4Ygk4iSpw4RRxDXY1uk9xeyUXOmg7UOuZvGekRc9cs8E61LWKdI08uv0kUyC4V6YxaETtrhniAtKD9t7FQ2qTFYi<br>'+
            'Link â„–1 Filelist',
        'links' : [
            "http://zngbsq66uwem4qzyxpqb5rjo2xebnbwdku27nhmquryx6ljnbbedhiad.onion/thinline.lst.zip",
            "http://zngbsq66uwem4qzyxpqb5rjo2xebnbwdku27nhmquryx6ljnbbedhiad.onion/thinline.rar"
        ]
},
{
        'title' : 'crownlaboratories.com',
        'short' : 'crownlaboratories.com 8Tb uncompressed data',
        'full' : 'Crown Laboratories <br>' +
                 'Crown Laboratories, founded in 2000 and based in Johnson City, TN, provides pharmaceutica…

Screenshot of the leak post

Leak screenshot for entandallergy.com

Sources

Source

Indexed 1 year 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 Abyss

Abyss is a relatively new ransomware group that emerged in March 2023, operating with primarily financial motivations and targeting organizations across multiple sectors with a focus on English-speaking countries. The group's origin and affiliations remain largely undocumented by major security agencies, though their targeting patterns suggest they operate independently rather than as a Ransomware-as-a-Service model. Their attack methodology and specific tools have not been extensively documented by major threat intelligence firms, though their victim profile of 87 organizations indicates they employ effective initial access techniques to compromise business services, technology, healthcare, and agriculture sectors. The group demonstrates a clear geographic preference for targets in the United States, United Kingdom, Canada, Switzerland, and Hong Kong, suggesting either language preferences or specific regional access capabilities. Due to the group's recent emergence and relatively limited public documentation from established security researchers, detailed information about notable campaigns, encryption methods, or law enforcement actions remains scarce. Abyss appears to remain active as of current reporting, though the lack of extensive public analysis by major threat intelligence organizations suggests they may operate at a smaller scale compared to more prominent ransomware families. The group has been linked to 103 public disclosures across our corpus. First observed on a leak site on March 21, 2023; most recent post June 7, 2026. The operation is currently active.

Timeline of this disclosure

  • March 28, 2025entandallergy.com listed by Abysson the group's public leak site
Data size
29 GB
Ransom demanded
$50

Other recent disclosures by Abyss

Abyss has been linked to 103 public victims on Darkfield. A sample of the most recent:

See the full Abyss 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, entandallergy.com is reported in United States, a country with 11,033 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Abyss means entandallergy.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 Abyss'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.