Was ANDRADE GUTIERREZ & ZAGOPE hit by ransomware?

ANDRADE GUTIERREZ & ZAGOPE was listed by the Dunghill_Leak ransomware operation (Brazil), and stolen data was published on the group's leak site. Darkfield tracks this disclosure with the original leak post, screenshot and group context.

Who is the Dunghill_Leak ransomware group?

Dunghill_Leak is a ransomware operator tracked by Darkfield. See the full operator dossier for its known victims, sectors targeted, IOCs and leak-site infrastructure.

What data was leaked in the ANDRADE GUTIERREZ & ZAGOPE breach?

Dunghill_Leak published data attributed to ANDRADE GUTIERREZ & ZAGOPE. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

← All victims

Andrade Gutierrez

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

38m

Age

since listed · data leaked

Status timeline

ListedMay 27, 2023
Data leakeddate unknown

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.

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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

Other recent disclosures by Dunghill_Leak

Dunghill_Leak has been linked to 16 public victims on Darkfield. A sample of the most recent:

See the full Dunghill_Leak dossier →

Sector and geography

This disclosure adds to ransomware activity in the Construction sector, which has 988 disclosures indexed across all operators we track. Geographically, ANDRADE GUTIERREZ & ZAGOPE is reported in Brazil, a country with 404 ransomware disclosures in our corpus.

If your organisation is affected

A listing by Dunghill_Leak means ANDRADE GUTIERREZ & ZAGOPE appeared on a ransomware extortion site and data attributed to it has been published. If this is your organisation, or a supplier you depend on, the priority is to confirm the intrusion and contain it before the window to act closes.

Engage your incident-response team and preserve forensic evidence before remediating — do not wipe affected systems first.
Force a password reset and revoke active sessions for exposed accounts; rotate any credentials, API keys or certificates that may have been in the stolen data.
Assess regulatory notification duties (GDPR, NIS2, sector regulators) — many carry a 72-hour reporting clock from awareness.
Report the incident to your national CERT, CERT.br (Brazil), as required for your jurisdiction.
Monitor for the data appearing on Dunghill_Leak's leak site and across paste and breach channels, and brief downstream partners who may be exposed through you.

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.