Was Concord Eye Center hit by ransomware?

Concord Eye Center was listed by the Interlock 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 Interlock ransomware group?

Interlock 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 Concord Eye Center breach?

Interlock published data attributed to Concord Eye Center. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Concord Eye Center

Claimed by Interlock · listed 2 hours ago

Today

Age

since listed · data leaked

Status timeline

ListedOct 12, 2026
Data leakeddate unknown

At a glance

Group: Interlock
Status: Data leaked
Country: United States
Sector: Healthcare
Listed on leak site: Oct 12, 2026

About the victim

AI dossier — public-source company profile

Concord Eye Center is a private ophthalmology clinic specializing in various eye care fields. The clinic operates in the United States and serves patients requiring diagnostic, surgical, and treatment services.

Industry: Healthcare - Ophthalmology

Attack summary

Severity: critical — Confirmed exfiltration of Protected Health Information (PHI) at scale, including SSNs, medical histories, and financial data. Direct violation of HIPAA and HITECH Act regulations with documented regulatory exposure.

The interlock group claims to have exfiltrated Protected Health Information (PHI) from the clinic, including patient identification, medical history, diagnostic results, treatment records, and billing/insurance information. The group alleges the clinic failed to implement adequate security controls and records management practices.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Patient names and identification
Addresses and contact information
Dates of birth
Social Security numbers
Ophthalmological and systemic medical history
Family medical history
Diagnostic and laboratory results
Surgical and treatment documentation
Insurance information
Claims data
Payment records

What the group claims

A private ophthalmology clinic specializing in various fields. However, it completely fails to ensure the security of itself and its clients and is extremely lax in its recordkeeping. The structure of its confidential records is determined by the categories of protected health information (PHI) it creates and stores. Because Concord Eye Center makes no attempt to regulate security, we provide you with the following information: patient identification and administrative data: this includes names, addresses, dates of birth, social security numbers, and contact information; clinical and medical history: detailed symptom records, ophthalmological and systemic medical history, and family history; diagnostic and lab results; surgical and treatment documentation; billing and financial information: insurance information, claims data, and payment records. Leaking these documents would primarily violate the HIPAA Privacy and Security Rules (45 CFR Parts 160 and 164) and the HITECH Act, which provide for tiered civil penalties for each category of violation, leading to distrust of their business by customers and partners and its collapse.

Sources

Victim sitehttp:www.concordeyecenternh.com
Leak posthttp://24atwvswwffsq4ofiqmeuoj6g4s6qalgm22rzfgriduupqqdilltasid.onion/index.php?p=

Source

Indexed 2 hours 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 Interlock

Interlock is a recently emerged ransomware group that began operations in October 2024, primarily motivated by financial gain through extortion activities targeting organizations across multiple sectors. The group's country of origin and potential affiliations remain unclear given their recent emergence, with insufficient public documentation to determine whether they operate as an independent entity or under a Ransomware-as-a-Service model. Limited public information exists regarding their specific attack methodologies, initial access vectors, or encryption techniques, as major cybersecurity firms and law enforcement agencies have not yet published comprehensive technical analyses of their operations. Since beginning operations, Interlock has reportedly compromised approximately 100 victims, with their targeting primarily focused on organizations in English-speaking countries including the United States, Canada, United Kingdom, and Australia, as well as Italy, while demonstrating a preference for attacking education, manufacturing, healthcare, and public sector entities. The group remains active as of late 2024, though comprehensive threat intelligence profiles from established security research organizations have not yet been published due to the group's recent emergence in the threat landscape. The group has been linked to 139 public disclosures across our corpus. First observed on a leak site on October 13, 2024; most recent post October 12, 2026. The operation is currently active.

Timeline of this disclosure

October 12, 2026Concord Eye Center listed by Interlock on the group's public leak site

Other recent disclosures by Interlock

Interlock has been linked to 139 public victims on Darkfield. A sample of the most recent:

See the full Interlock dossier →

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 2,610 disclosures indexed across all operators we track. Geographically, Concord Eye Center is reported in United States, a country with 3,176 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Interlock means Concord Eye Center 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 Interlock'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.