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Leak-site post naming Prefeitura Municipal de Arcos, captured by ThreatCluster

Prefeitura Municipal de Arcos

emperador

Ransomware leak-site victim intelligence

Data size
462.3 MB
Views
14,449
Posted
Aug 18, 2026
Countdown
You have 14 days to respond. No response = data published + permanent loss.
Country
Brazil
Industry
Government & Defense

Summary

Written by ThreatClusterfrom site fields, file listing, victim profile, leak post, screenshot, ransom note

The emperador group claims to have complete, unrestricted access to the Prefeitura Municipal de Arcos' internal infrastructure (domain arcos.mg.gov.br), with all servers, databases, emails, and admin credentials exfiltrated and critical systems encrypted. They also claim a data size of 462.3 MB and have published a sample file named arcos.mg.gov.br.zip; the leak page shows a 14-day countdown to respond, after which data would be published and permanent loss would occur. The leak page identifies the victim as Prefeitura Municipal de Arcos (arcos.mg.gov.br) and states the publication status as published.

Describes what the group claims on its leak site. A listing is not confirmation that a breach occurred.

What was taken

We hold complete, unrestricted access to your internal infrastructure. All servers, databases, emails, and admin credentials have been exfiltrated. Critical systems have been encrypted. We have your data. You do not. You have 14 days to respond. No response = data published + permanent loss. Contact us through the provided channel. No third parties. No recovery attempts.

File types seen
zip × 1
Sample files (1)
arcos.mg.gov.br.zip

Ransom note

Published by the group on their leak site, reproduced verbatim.

We hold complete, unrestricted access to your internal infrastructure. All servers, databases, emails, and admin credentials have been exfiltrated. Critical systems have been encrypted.
We have your data. You do not.
You have 14 days to respond. No response = data published + permanent loss.
Contact us through the provided channel. No third parties. No recovery attempts.

Also stated on the leak page

Fields this group publishes that do not map to a standard column. Labels are the site's own.

To Publish
arcos.mg.gov.br.zip

Leak-site images (1)

Images from the victim's leak listing. Thumbnails scraped from the onion page are blurred by default — click a thumbnail to view.

ThreatCluster capture