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 30 public disclosures across our corpus. First observed on a leak site on April 13, 2026; most recent post May 19, 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

Sector and geography

This disclosure adds to ransomware activity in the Telecommunication sector, which has 54 disclosures indexed across all operators we track. Geographically, Sistemas Electrónicos y de Telecomunicaciones is reported in MX, a country with 52 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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Sistemas Electrónicos y de Telecomunicaciones

Claimed by lamashtu · listed 10 days ago

Age

since listed · data leaked

Status timeline

Listed
May 11, 2026
Data leaked

At a glance

Group: lamashtu
Status: Data leaked
Country: MX
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 10 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.