Was GRUPO RONDA hit by ransomware?

GRUPO RONDA was listed by the lamashtu ransomware operation (Mexico), 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 lamashtu ransomware group?

lamashtu 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 GRUPO RONDA breach?

lamashtu published data attributed to GRUPO RONDA. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Grupo Ronda y Auditores S.L.P.

listed as GRUPO RONDA · Claimed by Lamashtu · listed 3 months ago

Age

since listed · data leaked

Status timeline

ListedApr 14, 2026
Data leakeddate unknown

At a glance

Group: Lamashtu
Status: Data leaked
Country: Mexico
Sector: Business Services
Listed on leak site: Apr 14, 2026

About the victim

AI dossier — public-source company profile

Grupo Ronda y Auditores S.L.P. is a Spanish professional services firm operating since 1978, providing statutory and voluntary audits, insolvency administration, forensic accounting reports for judicial proceedings, business advisory, and vehicle registration management (gestoría). The firm is staffed by registered auditors, insolvency administrators, forensic accountants, lawyers, and business administration graduates, and serves clients throughout Spain.

Industry: Audit, Forensic Accounting & Business Advisory Services
Founded: 1978

Attack summary

Severity: high — Data has been confirmed published by the threat actor. As an audit and forensic accounting firm, Grupo Ronda handles highly sensitive client financial, legal, and judicial records, including PII and confidential business data, making exposure of significant consequence even without explicit volume figures.

The Lamashtu ransomware group claims to have attacked Grupo Ronda and has published data (disclosed status: data_published), though the leak post does not specify whether encryption, exfiltration, or both occurred, nor does it detail the volume or nature of the stolen data.

high

Data the group says was taken

AI dossier — extracted from the leak post

Client financial and accounting records
Forensic accounting reports
Judicial proceeding documents
Business advisory files
Corporate legal documentation
Employee/professional credentials data

What the group claims

Grupo Ronda Auditores es un despacho constituido por un equipo de: Auditores, Mediadores Concursales, Expertos Contables, Licenciados en Derecho, debidamente colegiados. Licenciados en Administración y Dirección de empresas

Sources

Source

Indexed 3 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.

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Disclosure context

About lamashtu

Based on the limited available information, Lamashtu is an emerging ransomware group that was first observed in April 2026, appearing to be financially motivated based on their operational patterns. The group's origin and potential affiliations remain unclear due to their recent emergence and limited public documentation by major threat intelligence organizations. Lamashtu's attack methodology and specific technical capabilities have not been extensively documented by established security researchers, though their targeting patterns suggest they employ standard ransomware deployment techniques across multiple industry verticals. The group has conducted at least 8 confirmed attacks, demonstrating a geographically diverse targeting approach with victims identified in France, Italy, the United States, Singapore, and Malaysia, while focusing primarily on business services, manufacturing, transportation and logistics, hospitality and tourism, and energy sectors. Given the group's recent first observation in April 2026 and limited public threat intelligence reporting from established sources like CISA, FBI, or major security firms, Lamashtu appears to represent a newly active threat actor whose current operational status and long-term capabilities require further monitoring and analysis. The group has been linked to 34 public disclosures across our corpus. First observed on a leak site on April 13, 2026; most recent post June 17, 2026. The operation is currently active.

Timeline of this disclosure

April 14, 2026GRUPO RONDA listed by lamashtuon the group's public leak site

Other recent disclosures by lamashtu

lamashtu has been linked to 34 public victims on Darkfield. A sample of the most recent:

See the full lamashtu dossier →

Sector and geography

This disclosure adds to ransomware activity in the Business Services sector, which has 3,796 disclosures indexed across all operators we track. Geographically, GRUPO RONDA is reported in Mexico, a country with 70 ransomware disclosures in our corpus.

If your organisation is affected

A listing by lamashtu means GRUPO RONDA 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-MX (Mexico), as required for your jurisdiction.
Monitor for the data appearing on lamashtu'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.