Black Shrantac claims to have stolen data from simsekas, Inc

• Ransomware group: Black Shrantac
• Country: Türkiye
• Sector: Manufacturing
• Announcement date: November 13, 2025

Black Shrantac lists data allegedly stolen from simsekas, Inc

The ransomware group known as Black Shrantac has listed data on its leak site that it claims belongs to simsekas, Inc. According to the announcement made on November 13, 2025, the group alleges it has successfully compromised the organization's systems, resulting in the theft of a significant volume of information.

The group claims to have exfiltrated approximately 200 GB of data. This alleged breach involves various business process documents and records pertaining to employees. To support their claims, the threat actors have shared several samples of operational and financial documents as part of their public announcement on the leak site.

Details of the alleged data breach

The information that the group claims to have stolen is diverse, spanning across human resources, finance, and strategic business operations. The alleged leak includes sensitive personal information that could pose significant risks to individuals, as well as proprietary business data that could impact the company's competitive standing.

The data types identified in the group's claim include:

• Personal HR records
• Passport information
• Insurance documents
• Tax documents
• Balance sheets and profit and loss statements
• Customer relationship management (CRM) data
• Marketing plans
• Business continuity plans

Ransomware groups often employ a strategy known as double extortion. In this model, attackers do not just encrypt an organization's data to disrupt operations; they also steal sensitive information before the encryption occurs. The threat of leaking this stolen data on a public site is then used as leverage to pressure the victim into paying a ransom. If the ransom is not met, the group proceeds to publish the data, exposing the organization to regulatory, legal, and reputational consequences.

About simsekas, Inc

Simsekas, Inc is a manufacturing company based in Istanbul, Türkiye. The organization operates within the automotive supply industry, where it specializes in the production of metal parts and plastic injection components. As a provider of component supplies, the company serves various industrial sectors through its manufacturing capabilities.

Risk assessment and industry implications

The alleged exposure of this data carries multifaceted risks for the organization and the individuals involved. For employees and customers, the theft of passport information, insurance documents, and other personal HR records creates a high risk of identity theft and fraudulent activities. Such sensitive personal data is highly valued by cybercriminals for secondary attacks, including targeted phishing campaigns or social engineering attempts.

From a corporate perspective, the leak of financial documents—such as tax returns, balance sheets, and profit and loss statements—alongside marketing and business continuity plans, could weaken the organization's competitive advantage. The exposure of these trade secrets and operational strategies can provide competitors with insights into the company's internal workings and future directions.

Furthermore, because the organization operates in Türkiye, this incident may trigger specific legal obligations. Under the Personal Data Protection Law (KVKK), organizations may face mandatory data breach notification requirements when personal data is compromised. While information regarding the specific methods and identity of the Black Shrantac group remains limited, the nature of the leaked data suggests it could be utilized in subsequent waves of malicious activity.

In the manufacturing sector, maintaining robust cybersecurity defenses is critical to protecting intellectual property and ensuring business continuity. Organizations in this sector often focus on securing industrial control systems, implementing strict access controls for sensitive business documents, and conducting regular employee training to recognize phishing attempts. Protecting the integrity of supply chain data and customer information is essential for maintaining trust and operational stability in a globalized manufacturing environment.