Disclosure context

About Bavacai

Based on the limited publicly available information, Bavacai is a relatively obscure ransomware operation first observed in May 2026 with primarily financial motivations, having targeted at least 16 known victims across multiple countries and sectors. The group's origin and affiliations remain unclear due to insufficient public documentation from major cybersecurity organizations, though their operational model and whether they function as a Ransomware-as-a-Service operation or independent entity has not been definitively established by security researchers. Their attack methodology, specific tools, and encryption techniques have not been extensively documented in public threat intelligence reports, though their targeting pattern suggests opportunistic victim selection across diverse industries including business services, education, consumer services, and agriculture sectors, with primary focus on victims in the United States, United Kingdom, Brazil, France, and Israel. No major high-profile campaigns or significant law enforcement actions against Bavacai have been publicly reported by CISA, FBI, or established cybersecurity firms like Mandiant. Given the recent emergence timeline and limited public intelligence reporting, the group's current operational status remains uncertain with insufficient data to determine whether they remain active or have ceased operations. The group has been linked to 16 public disclosures across our corpus. First observed on a leak site on May 5, 2026. The operation is currently active.

Timeline of this disclosure

May 5, 2026Atencio Engineering listed by Bavacaion 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, Atencio Engineering is reported in United States, a country with 7,392 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

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Atencio Engineering

Claimed by Bavacai · listed 15 days ago

15d

Age

since listed · data leaked

Status timeline

Listed
May 5, 2026
Data leaked

At a glance

Group: Bavacai
Status: Data leaked
Country: United States
Sector: Construction
Listed on leak site: May 5, 2026

About the victim

AI dossier — public-source company profile

Atencio Engineering is a civil engineering and land surveying firm operating in southern Colorado, primarily serving clients in Las Animas County, Pueblo County, and the Florence area. The firm provides services including site plans, boundary surveys, OWTS (septic system) design, fire line design, elevation certificates, and flood plain analysis. It appears to be a small, regionally focused practice.

Industry: Civil Engineering & Land Surveying
Address: Las Animas County / Pueblo County / Florence, CO area, United States

Attack summary

Severity: medium — Data has been published (confirmed exfiltration), which elevates severity beyond low; however, the data primarily comprises civil engineering and land surveying records rather than large-scale PII, medical, financial, or government/defence data, limiting severity to medium rather than high or critical.

The Bavacai ransomware group claims to have published data belonging to Atencio Engineering, with the disclosure status listed as data_published, indicating exfiltration and release of company data rather than encryption-only.

medium

Data the group says was taken

AI dossier — extracted from the leak post

Site plans
Boundary surveys
OWTS/septic design documents
Fire line design documents
Elevation certificates
Flood plain analysis records
Client records

What the group claims

Civil engineering & land surveying firm. Services: site plans, boundary surveys, OWTS (septic) design, fire line design, elevation certificates, flood plain analysis. Clients in Las Animas County, Pueblo County, Florence CO area.

The leak post

captured from the group's site

File Manager File Manager home page BARAAAI Data is being prepared for publication. BAPAMAI Data is being prepared for publication. BAUARAI Data is being prepared for publication. BAVADAI Data is being prepared for publication. BAVACAI Data is being prepared for publication. BAVAQAI Data is being prepared for publication. Raycolighting DEMO 3137 S Alameda Street, Los Angeles, CA 90058, USA $10 000 Organization with 2 emails extracted. Domain: raycolighting.com baralai Data is being prepared for publication. CEAGESP / Netfeirasp DEMO São Paulo, Brazil $20 000 Brazilian produce wholesale market network. Domain netfeirasp.ceagesp (CEAGESP). Also demarchibrasil.com.br accounts. Colegio María Inmaculada (CMI) DEMO Moravia, San José, Costa Rica $50000 Catholic school in Moravia, Costa Rica. Domain cmi.local / mariainmaculada.ed.cr. Servers: CMI-DC01, CMI-APP, CMI-HTTP2, main-server1/2. Académie de Montpellier / CSJM DEMO Béziers, Occitanie, France $15000 French public school network. Domain CSJM.BEZIERS, part of Académie de Montpellier (ac-montpellier.fr). Occitanie region (laregion.fr). Teacher and admin staff credentials. Palmers Relocations DEMO Victoria, Australia $63 000 Australian …

Sources

Leak posthttp://t33zoj4qwv455fog7qnb2azi5xcdxkixughmmduzbw2rtdgryqfbh6id.onion/company/atencio-engineering/

Source

Indexed 15 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.