Disclosure context

About blacknevas

Blacknevas is an emerging ransomware group that was first observed in August 2025, appearing to be primarily financially motivated based on their targeting patterns and operational characteristics. The group's origin and potential affiliations remain unclear due to limited public documentation from established threat intelligence sources, though their diverse geographic targeting suggests either a distributed operation or broad opportunistic approach. Based on available victim data, Blacknevas has compromised at least 23 organizations across multiple countries, with the United States, Spain, India, Japan, and Thailand being the most frequently targeted nations, while their sector focus spans technology, manufacturing, energy, and consumer services industries, suggesting they employ opportunistic rather than sector-specific targeting methodologies. The group's attack vectors, specific tools, and whether they operate as a Ransomware-as-a-Service model or maintain independent operations have not been publicly documented by major cybersecurity firms or government agencies. Due to the group's recent emergence in August 2025, there is insufficient public reporting from established sources like CISA, FBI, or major threat intelligence providers to detail notable campaigns or significant attacks beyond the confirmed victim count. Given the recency of their first observed activity, Blacknevas appears to remain active as of late 2025, though comprehensive threat intelligence profiles from authoritative sources have yet to be published. The group has been linked to 31 public disclosures across our corpus. First observed on a leak site on August 6, 2025; most recent post April 30, 2026. The operation is currently active.

Also tracked as: black nevas.

Timeline of this disclosure

September 1, 2025SISTRAN Consultores listed by blacknevason the group's public leak site

Data size: 1.1 TB
Records: 538K files

Sector and geography

This disclosure adds to ransomware activity in the Technology sector, which has 2,524 disclosures indexed across all operators we track. Geographically, SISTRAN Consultores is reported in Mexico, a country with 92 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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SISTRAN Consultores

Claimed by blacknevas · listed 9 months ago

1.1 TB

Data size

538K files records

Age

since listed · data leaked

Status timeline

Listed
Sep 1, 2025
Data leaked

At a glance

Group: blacknevas
Status: Data leaked
Country: Mexico
Sector: Technology
Listed on leak site: Sep 1, 2025
Data size: 1.1 TB
Records: 538K files

About the victim

AI dossier — public-source company profile

SISTRAN Consultores is a Latin American software and IT consulting company specializing exclusively in the insurance sector. It develops and implements integrated insurance management platforms (including SISE 3G and iConnectance) and serves more than 100 insurers across LATAM, with offices in Argentina, Mexico, Ecuador, Brazil, Colombia, Chile, Guatemala, Panama, and Puerto Rico. The company holds ISO 9001:2015 certification and operates commercially across all countries in the region.

Industry: Insurance Software & IT Consulting
Address: SISTRAN CORPORATE – Argentina – Buenos Aires; SISTRAN NORTH AMERICA – México – México DF; multiple regional offices across Latin America and Caribbean

Attack summary

Severity: critical — 1.1 TB / 538k files have been published from a company whose clients are 100+ insurance carriers across LATAM; the data almost certainly includes regulated PII, financial/policyholder records, and proprietary insurance-sector software assets at significant scale across multiple countries.

The blacknevas ransomware group claims to have exfiltrated 1.1 TB of data comprising approximately 538,000 files from SISTRAN Consultores, with a public file listing posted to an external file-sharing service, indicating confirmed data exfiltration and publication.

critical

Data the group says was taken

AI dossier — extracted from the leak post

538,000 files (unspecified content)
File listing / directory index
Potentially insurance client data
Potentially internal business documents
Potentially software source code or project files

The group's post references roughly 1 proof file.

What the group claims

538k files1.1TBlisting data https://gofile.io/d/r8a9GVThe company specializes in providing IT services, software development, and consulting solutions, primarily focused on the insurance industry.

Sources

Source

Indexed 9 months 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.