Disclosure context

About Dunghill_Leak

Dunghill_Leak is a relatively obscure ransomware operation that emerged in April 2023, primarily motivated by financial gain through extortion activities targeting small to medium-sized organizations. The group's country of origin and potential affiliations with other cybercriminal organizations remain unknown due to limited public reporting from major threat intelligence firms and law enforcement agencies. Based on their targeting patterns, the group appears to focus on opportunistic attacks against businesses in English-speaking countries, particularly the United Kingdom, Canada, and United States, as well as expanding operations into South American markets including Brazil and Bolivia, with a preference for victims in business services and technology sectors. With only 16 documented victims since their emergence, Dunghill_Leak operates as a smaller-scale ransomware group compared to major threat actors, and specific details about their attack methodologies, initial access vectors, encryption techniques, or whether they employ double extortion tactics have not been extensively documented in publicly available threat intelligence reports. The group's current operational status remains unclear, as limited public information prevents a comprehensive assessment of their ongoing activities or potential law enforcement disruption efforts. 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 Dunghill_Leakon 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

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

36m

Age

since listed · data leaked

Status timeline

Listed
May 27, 2023
Data leaked

At a glance

Group: Dunghill_Leak
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, operating across 44 countries with a portfolio of over 900 projects spanning hydroelectric and thermoelectric power plants, nuclear facilities, petrochemical plants, railways, airports, subways, mining, and civil infrastructure. The group also includes Zagope, its European operations arm.

Industry: Heavy Engineering & Construction
Address: Belo Horizonte, Minas Gerais, Brazil

Attack summary

Severity: high — The victim is a major multinational construction and engineering conglomerate involved in critical infrastructure (power plants, refineries, nuclear facilities, railways, airports) across 44 countries. The data_published status confirms exfiltration and public release of significant business and potentially sensitive infrastructure-related data, warranting a high severity rating.

The Dunghill_Leak group claims to have exfiltrated data from Andrade Gutierrez and its affiliate Zagope, with the disclosure status recorded as data_published, indicating stolen data has been released or made available. No specific data volume or ransom demand was stated in the post.

high

Data the group says was taken

AI dossier — extracted from the leak post

Corporate business data
Engineering project documents
Employee records
Financial records
Supplier/vendor information

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

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.