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

December 15, 2025republica federative do brasil listed by Killsecurityon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Public Sector sector, which has 259 disclosures indexed across all operators we track. Geographically, republica federative do brasil 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

Republica Federativa do Brasil (Federal Government of Brazil)

listed as republica federative do brasil · Claimed by Killsecurity · listed 5 months ago

Age

since listed · data leaked

Status timeline

Listed
Dec 15, 2025
Data leaked

At a glance

Group: Killsecurity
Status: Data leaked
Country: Brazil
Sector: Public Sector
Listed on leak site: Dec 15, 2025

About the victim

AI dossier — public-source company profile

The Federative Republic of Brazil is the sovereign federal government of Brazil, encompassing the executive, legislative, and judicial branches headquartered in Brasília, DF. It is the largest country in South America and the fifth largest in the world by area. As a federal entity, it oversees public administration, national infrastructure, and public services for a population exceeding 215 million.

Industry: Federal Government / Public Sector
Address: Praça dos Três Poderes, Brasília, DF 70150-900, Brazil
Founded: 1822

Attack summary

Severity: medium — The target is a national government entity, which elevates inherent sensitivity; however, no proof files have been published yet (0/1 disclosures), no data volume or type is confirmed, and the clearnet site reference is a placeholder (example.com), leaving claims entirely unverified.

KillSecurity claims a data disclosure event against the Federal Government of Brazil, with a single disclosure indicated (0/1 released). No ransom amount, exfiltration volume, or specific data types are described in the post.

medium

What the group claims

Price ??? Disclosures 0/1

Sources

Victim siteexample.com

Source

Indexed 5 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.