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Ransomware Victim Energy

Sabesp

Ransomware attack by Ransomhouse ยท Disclosed November 1, 2024 ยท ๐Ÿ‡ง๐Ÿ‡ท Brazil

sabesp.com.br

Date Disclosed
Nov 1, 2024
2024
Threat Group
Ransomhouse
140 total victims
Country
๐Ÿ‡ง๐Ÿ‡ท Brazil
Industry
Energy

Incident Analysis

Sabesp was targeted by Ransomhouse ransomware, one of the most active ransomware groups in our database with 140 confirmed victims globally. The attack was disclosed on November 1, 2024, when Sabesp appeared on the group's dark web leak site.

Sabesp is based in Brazil , operating in the Energy sector. Brazil ranks #7 globally for ransomware attacks, with 415 victims in our database.

Sector context: Energy sector attacks can have critical infrastructure implications. Ransomware on operational technology (OT) networks can disrupt power generation and distribution, elevating the urgency of recovery.

Ransomhouse 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 โ€” 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: Aug 2, 2026 08:00 UTC.

Frequently Asked Questions

Was Sabesp attacked by ransomware?

Yes. Sabesp was listed as a victim of the Ransomhouse ransomware group on November 1, 2024. The organisation is based in Brazil and operates in the Energy sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked Sabesp?

Sabesp was attacked by Ransomhouse ransomware. Ransomhouse is one of the most active ransomware groups, having claimed 140 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the Sabesp ransomware attack occur?

The ransomware attack on Sabesp was disclosed on November 1, 2024. 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 Sabesp ransomware attack?

The specific data stolen from Sabesp 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 Energy organisation, Sabesp likely held sensitive business data, client information, and operational records.

How can organisations protect against Ransomhouse attacks?

To defend against Ransomhouse 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.