Disclosure context

About Killsecurity

Killsecurity is a relatively new ransomware group that emerged in March 2024, operating with apparent financial motivations and demonstrating rapid expansion in their victim targeting. The group's origin and affiliations remain unclear due to limited public documentation from major threat intelligence sources, though their global targeting pattern suggests a sophisticated operation. Based on available victim data, Killsecurity has compromised 276 organizations primarily across the United States, India, United Kingdom, Brazil, and Belgium, with a particular focus on healthcare, technology, business services, and financial sectors. The group's attack methodology, encryption techniques, and specific tools remain undocumented in public threat intelligence reports from established security firms. Notable campaigns and high-profile victims have not been extensively documented by major cybersecurity organizations or law enforcement agencies, likely due to the group's recent emergence. Killsecurity appears to remain active as of current reporting, though comprehensive analysis of their operations is limited by the lack of detailed technical documentation from reputable threat intelligence sources. The group has been linked to 277 public disclosures across our corpus. First observed on a leak site on March 21, 2024; most recent post May 15, 2026. The operation is currently active.

Timeline of this disclosure

March 17, 2026hospitalvetdiadema24h.com.br listed by Killsecurityon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Healthcare sector, which has 1,779 disclosures indexed across all operators we track. Geographically, hospitalvetdiadema24h.com.br is reported in Brazil, a country with 319 ransomware disclosures in our corpus.

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.

Ransomware victim disclosure

← All victims

Hospital Veterinário Diadema 24h

listed as hospitalvetdiadema24h.com.br · Claimed by Killsecurity · listed 2 months ago

Age

since listed · data leaked

Status timeline

Listed
Mar 17, 2026
Data leaked

At a glance

Group: Killsecurity
Status: Data leaked
Country: Brazil
Sector: Healthcare
Listed on leak site: Mar 17, 2026

About the victim

AI dossier — public-source company profile

Hospital Veterinário Diadema 24h is a 24-hour veterinary hospital located in Diadema, São Paulo, Brazil. The facility provides emergency and routine veterinary care for animals. The organisation operates in the healthcare sector serving the greater São Paulo metropolitan area.

Industry: Veterinary Healthcare Services
Address: Diadema, São Paulo, Brazil

Attack summary

Severity: medium — Data is marked as published, suggesting exfiltration occurred, but the leak post contains virtually no detail on data volume, type, or confirmed sensitive content; the target is a small veterinary clinic in Brazil with likely limited but potentially PII-containing records.

Killsecurity claims to have compromised the organisation and has published data (disclosed status: data_published), though the leak post provides minimal detail on the nature of exfiltrated data or encryption activity.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Potentially patient (animal) records
Client personal information
Veterinary medical records
Business operational data

What the group claims

Price ??? Disclosures 0/1

Sources

Victim siteexample.com

Source

Indexed 2 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.