Toyota Brazil listed on Hunters ransomware leak site

• Ransomware group: Hunters
• Country: Brazil
• Sector: Manufacturing
• Announcement date: April 13, 2024

Hunters ransomware group claims data exfiltration from Toyota Brazil

The Hunters ransomware group has listed Toyota Brazil on its dedicated leak site, claiming to have successfully exfiltrated sensitive information from the organization. This announcement, made on April 13, 2024, marks a significant incident involving a major player in the manufacturing sector. While the group has claimed responsibility for the breach, it is important to note that these claims originate from the threat actor's own platform.

Details of the alleged attack

According to the announcement made by the Hunters group, the attack occurred on April 13, 2024. A notable detail provided by the threat actors is that while they claim to have exfiltrated data from the organization, they noted that their activities did not involve the encryption of systems. This distinction is significant in the context of modern cyberattacks, where threat actors often shift their tactics to focus on data theft rather than traditional system locking.

In the landscape of cyber threats, ransomware groups often employ a strategy known as double extortion. In this model, attackers do not merely lock a company's files to demand a ransom; they also steal sensitive data and threaten to leak it publicly if the ransom is not paid. This increases the pressure on the victim, as the threat of data exposure can cause significant reputational and regulatory damage, regardless of whether the company can restore its systems from backups.

Scope of the compromised data

The Hunters group has provided specific metrics regarding the volume of information they claim to have stolen. The announcement alleges that the compromised dataset is substantial in size and complexity. The specific details provided by the group include:

• Total data size: 169.4 GB
• Total file count: 110,312 files

While the group has provided these quantitative metrics, no specific details regarding the actual content or the nature of the leaked data have been provided. However, a screenshot associated with the claim indicates that the stolen information is categorized by the group as 'all data'.

About Toyota Brazil

Toyota do Brasil serves as the Brazilian subsidiary of the Japanese automotive giant, Toyota. The company plays a vital role in the South American market, where it manufactures, sells, and provides comprehensive after-sales services for various automobile models.

Analysis and implications for the manufacturing sector

Hunters International is a group that emerged in 2023 and is assessed to be derived from Hive ransomware code. The group's tactics, particularly the focus on exfiltration over encryption, align with evolving trends in the cybercrime underground. Reports suggesting that the group ceased encryption activities in 2025 may indicate that the group has shifted toward a data-exfiltration-focused model.

The exfiltration of an organization's data can lead to the exposure of critical employee or operational information. For a large-scale manufacturer like Toyota Brazil, such a breach carries significant risks. Under Brazil's data protection regulation, LGPD, the organization may be required to report a potential data breach to the relevant authorities. Furthermore, the leaked data could potentially be used by malicious actors for identity theft or targeted phishing attacks in the future.

To defend against such threats, organizations in the manufacturing sector often implement various defensive steps. These include robust data loss prevention (DLP) strategies, strict access controls to prevent unauthorized data movement, and continuous monitoring of network traffic for unusual patterns. Additionally, maintaining comprehensive logs and ensuring that data is segmented can help limit the scope of what an attacker can access during an exfiltration event.