Was Sistemas Electrónicos y de Telecomunicaciones hit by ransomware?

Sistemas Electrónicos y de Telecomunicaciones 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 Sistemas Electrónicos y de Telecomunicaciones breach?

lamashtu published data attributed to Sistemas Electrónicos y de Telecomunicaciones. Darkfield captured the leak post and a screenshot of the listing.

Ransomware victim disclosure

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Sistemas Electrónicos y de Telecomunicaciones

Claimed by Lamashtu · listed 2 months ago

Age

since listed · data leaked

Status timeline

ListedMay 11, 2026
Data leakeddate unknown

At a glance

Group: Lamashtu
Status: Data leaked
Country: Mexico
Sector: Telecommunication
Listed on leak site: May 11, 2026

About the victim

AI dossier — public-source company profile

Sertes (Sistemas Electrónicos y de Telecomunicaciones) is a Mexican company with approximately 38 years of operation, specializing in energy generation and quality solutions, industrial automation, control systems, and telecommunications. They sell and rent equipment from brands such as Industronic and Generac, offering UPS systems, voltage regulators, electric generators, and specialized maintenance services. The company provides 24/7 certified technical support for installation, preventive maintenance, and monitoring across industrial, commercial, and residential sectors.

Industry: Industrial Automation, Energy Solutions & Telecommunications
Founded: 1987

Attack summary

Severity: high — Data has been confirmed published (data_published status) by the threat actor, indicating successful exfiltration. The victim operates critical infrastructure-adjacent systems including SCADA, PLC, and energy management solutions; exposure of such operational technology data carries significant business and potentially industrial security implications.

The ransomware group Lamashtu claims an attack on Sertes, with the disclosure status marked as data_published, indicating data has been exfiltrated and published. The leak post references access to company data related to industrial automation, SCADA systems, IoT integration, and telecommunications operations.

high

Data the group says was taken

AI dossier — extracted from the leak post

Industrial automation project data
PLC programming files
SCADA system configurations
IoT integration data
Telecommunications solutions data
Internal company records

What the group claims

Sertes is a Mexican company specializing in industrial automation, control systems, and telecommunications solutions. They provide PLC programming, SCADA systems, IoT integration...

Sources

Source

Indexed 2 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

May 11, 2026Sistemas Electrónicos y de Telecomunicaciones 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 Telecommunication sector, which has 172 disclosures indexed across all operators we track. Geographically, Sistemas Electrónicos y de Telecomunicaciones is reported in Mexico, a country with 70 ransomware disclosures in our corpus.

If your organisation is affected

A listing by lamashtu means Sistemas Electrónicos y de Telecomunicaciones 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.