Disclosure context

About dunghill

The dunghill ransomware group is a relatively new financially-motivated cybercriminal operation that emerged in April 2023, with documented attacks against 16 victims across multiple countries and sectors. Based on limited public reporting, the group's origin and affiliations remain unclear, though their targeting patterns suggest they operate as an independent entity rather than a established ransomware-as-a-service operation. The group has demonstrated a preference for targeting business services and technology sectors, with attacks documented across the United Kingdom, United States, Brazil, Bolivia, and Taiwan, indicating either a broad opportunistic approach or the use of initial access brokers to expand their geographic reach. While specific technical details about their attack methodology, encryption techniques, and extortion tactics have not been extensively documented in public threat intelligence reports, their multi-country victim distribution suggests they employ common initial access vectors such as phishing, credential theft, or exploitation of internet-facing vulnerabilities. No major high-profile attacks or significant law enforcement actions against the dunghill group have been publicly reported, likely due to their recent emergence and relatively small victim count compared to more established ransomware operations. As of current reporting, the group appears to remain active with limited public visibility into their operations. The group has been linked to 16 public disclosures across our corpus. First observed on a leak site on April 10, 2023; most recent post July 1, 2025. The operation is currently inactive.

Timeline of this disclosure

May 27, 2023ANDRADE GUTIERREZ & ZAGOPE listed by dunghillon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 415 disclosures indexed across all operators we track. Geographically, ANDRADE GUTIERREZ & ZAGOPE 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

Andrade Gutierrez Engenharia S.A.

listed as ANDRADE GUTIERREZ & ZAGOPE · Claimed by dunghill · listed 3 years ago

36m

Age

since listed · data leaked

Status timeline

Listed
May 27, 2023
Data leaked

At a glance

Group: dunghill
Status: Data leaked
Country: Brazil
Sector: Construction
Listed on leak site: May 27, 2023

About the victim

AI dossier — public-source company profile

Andrade Gutierrez is a Brazilian private multinational engineering and construction conglomerate headquartered in Belo Horizonte, Minas Gerais. It is one of the largest construction companies in Brazil, with operations spanning over 900 projects across 44 countries in sectors including infrastructure, energy, oil & gas, and mining. Landmark projects include the Belo Monte hydroelectric plant, the Rio 2016 Olympic Park, and the S11D mining complex.

Industry: Heavy Engineering & Construction
Address: Belo Horizonte, Minas Gerais, Brazil
Employees: 10000+
Founded: 1948

Attack summary

Severity: high — Data has been confirmed as published (data_published status) by the threat actor against a major multinational conglomerate operating in critical infrastructure sectors (energy, nuclear, petrochemical, mining). The scale of the organisation and sensitivity of project-related and corporate data across 44 countries elevates this to high severity, though the absence of quantified PII or medical data prevents critical classification.

The Dunghill ransomware group claims to have compromised Andrade Gutierrez and its Portuguese subsidiary Zagope, with data reportedly published. No ransom amount or specific data volume was stated, but the disclosure status indicates data has been published.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate business data
Engineering project files
Financial records
Employee information
Supplier/vendor data
Internal communications

What the group claims

ANDRADE GUTIERREZ is a Brazilian private multinational conglomerate headquartered in Belo Horizonte. As of 2013, Andrade Gutierrez is the second largest construction company in Brazil with branches in 44 countries and a net income of 8 billion BRL. In the engineering segment, AG operates in the construction of hydroelectric power plants, thermoelectric power plants, nuclear power plants, petrochemical plants, mining, steel industry, refineries, harbors, subways, sanitation and urbanization, airports, railroads, civil engineering.

Sources

Victim siteandradegutierrez.com.br
Leak posthttp://p66slxmtum2ox4jpayco6ai3qfehd5urgrs4oximjzklxcol264driqd.onion/index2.html

Source

Indexed 3 years 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.