Ransomware victim disclosure

Grupo Mauá

Claimed by bravox · listed 3 days ago

Age

since listed · data leaked

Status timeline

Listed
May 31, 2026
Data leaked

At a glance

Group: bravox
Status: Data leaked
Country: BR
Sector: Manufacturing
Listed on leak site: May 31, 2026

About the victim

AI dossier — public-source company profile

Grupo Mauá is a Brazilian conglomerate operating across construction, real estate, energy, and infrastructure sectors. The company operates multiple business lines within these industries, serving as a significant player in Brazil's built environment and utilities landscape.

Industry: Construction, Real Estate, Energy & Infrastructure

Attack summary

Severity: medium — Data has been published by the threat actor (disclosed_status: data_published), indicating confirmed exfiltration; however, the specific data types, scale, and sensitivity are not documented in the available post excerpt, preventing higher severity classification.

The bravox group claims to have compromised Grupo Mauá and published exfiltrated data. The specific scope of the breach and data categories are not detailed in the available post excerpt.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Business records
Company data

What the group claims

Operates in the construction, real estate, energy, and infrastructure sectors.

Sources

Source

Indexed 3 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.

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Disclosure context

About bravox

Bravox is an emerging ransomware group first observed in February 2026, operating with apparent financial motivations based on their targeting patterns and victim selection. The group has claimed responsibility for attacks against at least 9 organizations, though limited public reporting exists regarding their specific origin, country of operation, or confirmed affiliations with other cybercriminal groups. Based on available victim data, Bravox demonstrates a preference for targeting organizations in the United States, Switzerland, France, and Canada, with particular focus on healthcare and agriculture/food production sectors, though their victim profile also includes entities from unspecified industry verticals. Due to the group's recent emergence and limited documented activity, detailed information regarding their specific attack methodologies, initial access vectors, encryption techniques, or use of double extortion tactics has not been extensively reported by major security firms or law enforcement agencies. Given the recency of their first observed activity in early 2026, comprehensive analysis of notable campaigns, major victim organizations, or law enforcement disruption efforts remains limited in publicly available threat intelligence reporting. The group's current operational status appears active based on the timeline of their emergence, though their relatively small victim count and limited public visibility suggest they may be a smaller-scale operation compared to more established ransomware groups. The group has been linked to 18 public disclosures across our corpus. First observed on a leak site on February 11, 2026; most recent post May 31, 2026. The operation is currently active.

Timeline of this disclosure

May 31, 2026Grupo Mauá listed by bravoxon the group's public leak site

Sector and geography

This disclosure adds to ransomware activity in the Manufacturing sector, which has 2,458 disclosures indexed across all operators we track. Geographically, Grupo Mauá is reported in BR, a country with 190 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.