Was Pulmonary Services Group hit by ransomware?

Pulmonary Services Group was listed by the thegentlemen ransomware operation (Puerto Rico), 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 thegentlemen ransomware group?

thegentlemen 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 Pulmonary Services Group breach?

thegentlemen published data attributed to Pulmonary Services Group. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Pulmonary Services Group

Claimed by Thegentlemen · listed 10 days ago

10d

Age

since listed · data leaked

Status timeline

ListedSep 30, 2026
Data leakeddate unknown

At a glance

Group: Thegentlemen
Status: Data leaked
Country: Puerto Rico
Sector: Healthcare
Listed on leak site: Sep 30, 2026

About the victim

AI dossier — public-source company profile

Pulmonary Services Group is a three-company healthcare provider operating in Puerto Rico since 1998, specializing in home medical equipment rental and sales, respiratory therapy services, and hospital equipment distribution. The group is JCAHO-accredited, Medicare-enrolled, and provides ventilators, CPAP/BiPAP devices, oxygen concentrators, and related home-care equipment with 24/7 support across Puerto Rico and the Caribbean.

Industry: Home Medical Equipment & Respiratory Therapy Services
Address: 1824 Ave. Fernandez Juncos, Santurce, San Juan, PR 00909; Office Park III Carr. #2 Km. 156.6 Suite 205, Mayagüez, PR 00681
Founded: 1998

Attack summary

Severity: high — Healthcare provider with Medicare enrollment holding patient medical records (PII and health information at scale); JCAHO-accredited status indicates regulated data. Disclosed status 'data_published' confirms exfiltration without encryption-only claim.

TheGentlemen ransomware group claims to have compromised Pulmonary Services Group. The leak post indicates data has been published but does not specify the scope of exfiltration, encryption status, or nature of data accessed.

high

Data the group says was taken

AI dossier — extracted from the leak post

Patient medical records
Medicare enrollment records
Healthcare provider data

What the group claims

pulmonaryservicesgrouppr.com zoominfo.com/c/pulmonary-services-group/442368923 Pulmonary Services Group (Medicare-enrolled since 1998, pulmonaryservicesgrouppr.com, Santurce/San Juan + Mayagüez, Puerto Rico) is a three-company group — Respiratory Equipment Leasing and Sales Services Corp., Mayagüez Alquiler y Venta, and Pulmonary Equipment Corp — providing home medical equipment and respiratory therapy services across the island and hospital equipment distribution to Puerto Rico and the Caribbean. Its specialty is home mechanical ventilation for ventilator-dependent patients (neonates to elderly), plus CPAP/BiPAP for sleep apnea, oxygen concentrators, speaking valves, enteral feeding and home-care gear (hospital beds, lifts, mattresses). The company holds JCAHO accreditation since 1998 in respiratory therapy and durable medical equipment, accepts Medicare and most local health plans, and offers 24/7 delivery, installation, training and technical support.

Sources

Victim sitepulmonaryservicesgrouppr.com

Source

Indexed 10 days 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 thegentlemen

thegentlemen is a ransomware group that emerged in September 2025, operating with apparent financial motivations based on their broad targeting of commercial sectors. The group has documented 267 victims across multiple countries, with primary focus on the United States, Thailand, France, Brazil, and India. Their targeting strategy demonstrates a preference for high-value sectors including manufacturing, technology, healthcare, and financial services organizations. Given the group's recent emergence and limited public documentation from established threat intelligence sources such as CISA, FBI, or major security research firms, specific details regarding their country of origin, operational structure, attack methodologies, encryption techniques, and whether they employ ransomware-as-a-service models remain unclear. The relatively high victim count of 267 in a short operational timeframe since September 2025 suggests either an aggressive campaign pace or potential inflation of victim numbers through affiliate operations, though without corroborating intelligence reports, the group's exact operational capabilities and notable campaigns cannot be definitively established. Current intelligence indicates the group remains active as of late 2025, though comprehensive threat profiling requires additional validated reporting from authoritative cybersecurity sources. The group has been linked to 960 public disclosures across our corpus. First observed on a leak site on September 9, 2025; most recent post October 9, 2026. The operation is currently active.

Also tracked as: the gentlemen.

Timeline of this disclosure

September 30, 2026Pulmonary Services Group listed by thegentlemen on the group's public leak site

Other recent disclosures by thegentlemen

thegentlemen has been linked to 960 public victims on Darkfield. A sample of the most recent:

See the full thegentlemen 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, Pulmonary Services Group is reported in Puerto Rico, a country with 2 ransomware disclosures in our corpus.

If your organisation is affected

A listing by thegentlemen means Pulmonary Services Group 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 thegentlemen'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.