Cyber Threat Intelligence
CTI Academy Sponsor CTI Academy
SI
Ransomware Victim Telecommunication

Sistemas Electrónicos y de Telecomunicaciones

Ransomware attack by Lamashtu · Disclosed May 11, 2026 · 🇲🇽 Mexico

sertes.com.mx

Date Disclosed
May 11, 2026
2026
Threat Group
Lamashtu
34 total victims
Country
🇲🇽 Mexico
Industry
Telecommunication

ThreatAI Analysis

Compiled from this incident record and the threat intelligence profile for Lamashtu. Figures and technique mappings are quoted from the source data, not inferred.

About the Lamashtu group

Lamashtu is an extortion group that first appeared in April 2026, claiming attacks against organizations in France, Romania, and Thailand across energy, pharmaceutical, and film sectors; it has not yet been confirmed as operating actual file-encrypting ransomware rather than pure data-theft extortion. Lamashtu has listed 34 victims since April 2026.

Incident Analysis

Sistemas Electrónicos y de Telecomunicaciones was targeted by Lamashtu ransomware, one of the most active ransomware groups in our database with 34 confirmed victims globally. The attack was disclosed on May 11, 2026, when Sistemas Electrónicos y de Telecomunicaciones appeared on the group's dark web leak site.

Sistemas Electrónicos y de Telecomunicaciones is based in Mexico , operating in the Telecommunication sector. Mexico ranks #12 globally for ransomware attacks, with 252 victims in our database.

Sector context: Organisations in this sector hold valuable data and operational systems that ransomware groups seek to exploit for financial gain through encryption and data exfiltration.

Lamashtu typically employs a double extortion model: first exfiltrating sensitive data from the victim's systems, then deploying ransomware to encrypt files. Victims face two simultaneous threats — paying to restore access and paying to prevent publication of stolen data. The group's leak site publishes victim names and exfiltrated data as leverage.

Data source: This incident record is sourced from public ransomware group leak site disclosures aggregated via the ransomware.live API. Disclosure date reflects when the victim was published on the leak site, which may differ from the initial date of compromise. This platform does not publish or link to stolen data. Last data update: Sep 6, 2026 18:00 UTC.

Frequently Asked Questions

Was Sistemas Electrónicos y de Telecomunicaciones attacked by ransomware?

Yes. Sistemas Electrónicos y de Telecomunicaciones was listed as a victim of the Lamashtu ransomware group on May 11, 2026. The organisation is based in Mexico and operates in the Telecommunication sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Sistemas Electrónicos y de Telecomunicaciones?

Sistemas Electrónicos y de Telecomunicaciones was attacked by Lamashtu ransomware. Lamashtu is one of the most active ransomware groups, having claimed 34 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Sistemas Electrónicos y de Telecomunicaciones ransomware attack occur?

The ransomware attack on Sistemas Electrónicos y de Telecomunicaciones was disclosed on May 11, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the Sistemas Electrónicos y de Telecomunicaciones ransomware attack?

The specific data stolen from Sistemas Electrónicos y de Telecomunicaciones has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Telecommunication organisation, Sistemas Electrónicos y de Telecomunicaciones likely held sensitive business data, client information, and operational records.

How can organisations protect against Lamashtu attacks?

To defend against Lamashtu and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.