Disclosure context

About apt73

APT73 is a recently emerged ransomware group that began operations in April 2024, with financial motivation as their primary driver based on their targeting patterns across multiple high-value sectors. The group has demonstrated rapid growth in their operational tempo, accumulating 78 documented victims within their first months of activity. Their targeting methodology shows a preference for English-speaking markets and major economies, with the United Kingdom and United States representing their primary focus areas, followed by significant activity in India, Brazil, and France. The group exhibits a clear preference for high-value sectors including business services, technology, financial services, and healthcare organizations, suggesting a calculated approach to victim selection based on potential payment capability and operational impact. Given the group's recent emergence and limited public documentation from major threat intelligence sources, specific details regarding their initial access vectors, tooling, encryption methods, or organizational structure remain largely unconfirmed by authoritative sources such as CISA, FBI, or established security research firms. The group's current operational status appears active based on the timeline of their emergence, though comprehensive analysis of their capabilities and infrastructure requires additional intelligence gathering and documentation by security researchers. The group has been linked to 141 public disclosures across our corpus. First observed on a leak site on April 22, 2024; most recent post April 27, 2026. The operation is currently inactive.

Also tracked as: Eraleign.

Timeline of this disclosure

April 27, 2026siapenet.gov.br listed by apt73on 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, siapenet.gov.br is reported in BR, a country with 189 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

SIAPE / SIAPEnet - Brazilian Federal Government Payroll System

listed as siapenet.gov.br · Claimed by apt73 · listed 24 days ago

23d

Age

since listed · data leaked

Status timeline

Listed
Apr 27, 2026
Data leaked

At a glance

Group: apt73
Status: Data leaked
Country: BR
Sector: Public Sector
Listed on leak site: Apr 27, 2026

About the victim

AI dossier — public-source company profile

SIAPEnet (Sistema Integrado de Administração de Pessoal) is the Brazilian federal government's integrated personnel and payroll administration system, operated under the Ministry of Management and Innovation in Public Services (MGI). It processes the remuneration of federal civil servants across all branches of the Brazilian federal administration. The portal serves as the web interface through which civil servants and retirees access payroll, benefit, and personnel data.

Industry: Federal Government Human Resources & Payroll Administration
Address: Brasília, Distrito Federal, Brazil

Attack summary

Severity: critical — SIAPEnet is a core Brazilian federal government payroll system processing PII and financial remuneration data for potentially hundreds of thousands of federal civil servants; confirmed exfiltration and publication of such data from a government system constitutes a critical breach of regulated, sensitive PII at scale in the public sector.

The group APT73 claims to have compromised SIAPEnet and exfiltrated data related to the remuneration and personal records of Brazilian federal civil servants; the status is listed as data_published, indicating the group asserts they have already released stolen data.

critical

Data the group says was taken

AI dossier — extracted from the leak post

Federal civil servant remuneration records
Personnel administration data
Government payroll data
Civil servant personal identifying information

What the group claims

Today, SIAPE processes the remuneration of civil servants, regulated both by the uniform federal ...

Sources

Victim sitesiapenet.gov.br
Leak posthttp://basherq53eniermxovo3bkduw5qqq5bkqcml3qictfmamgvmzovykyqd.onion/page_company.php?id=94

Source

Indexed 24 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.