National Water Authority listed on blackshrantac ransomware leak site

• Ransomware group: blackshrantac
• Country: Peru
• Sector: Government & Defense
• Announcement date: January 8, 2026

The National Water Authority in Peru has been listed on the leak site of the blackshrantac ransomware group. According to claims made by the threat actor, a significant volume of institutional data has been compromised during a recent cyberattack.

The alleged data breach event

The blackshrantac group has officially listed the National Water Authority on its dedicated leak site. The threat actor claims to have successfully compromised a massive dataset totaling 2TB in size. This alleged breach involves sensitive information related to critical water resource management, hydrometeorological data, and various technical permits. According to the group's announcement, the stolen data is scheduled to be published on their platform in the near future.

Details of the claimed stolen data

The data identified by the threat actor appears to encompass a wide range of technical and administrative documentation. The information allegedly stolen includes:

• Water resource management information
• Hydrometeorological data (including information on rivers, reservoirs, and rainfall)
• Regulatory documents and permits
• Risk management projects

The National Water Authority profile

The National Water Authority (ANA) is the government agency in Peru responsible for the sustainable management, protection, and use of water resources. The institution operates under the authority of the Ministry of Agrarian Development and Irrigation.

Impact assessment and organizational implications

This leak allegation suggests that operational data belonging to a critical public infrastructure entity may be at risk of exposure. The disclosure of hydrometeorological and risk management data could potentially create secondary risks for water security and disaster management processes in the region. Because the institution serves a public function, the incident may lead to administrative and legal consequences under Peruvian data protection regulations.

Information regarding the blackshrantac group remains limited. However, considering that ransomware actors typically employ double-extortion tactics, it is assessed that the institution's operational continuity may be negatively impacted. In double-extortion schemes, attackers not only encrypt an organization's systems to disrupt operations but also steal sensitive data to use as leverage, threatening to leak it publicly if a ransom is not paid.

For organizations operating within the government and public service sectors, such incidents highlight the necessity of robust cybersecurity frameworks. Defensive strategies typically involve implementing multi-factor authentication, maintaining offline backups, and conducting regular vulnerability assessments. Protecting critical infrastructure requires continuous monitoring of networks to detect unauthorized access before large-scale data exfiltration can occur. As seen in this case, the potential exposure of technical and regulatory data can extend beyond immediate operational disruptions to affect regional resource management and public safety protocols.