Kurosu & Co.SA - kurosu.com.py Listed by babuk2 Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

Ransomware groups continue to pressure organisations by combining encryption with data theft and public leak-site postings, a pattern that has become routine across industries and regions. Listings of this kind often surface before independent confirmation, leaving affected parties and the public with incomplete information while the claims circulate.

On 27 January 2025, the ransomware group known as babuk2 listed Kurosu & Co.SA - kurosu.com.py, stating that the organisation had been compromised and that internal files had been exfiltrated. The number of people affected remains unknown, and public detail beyond the group’s claim is limited. The incident matters because any organisation holding internal business records can expose employees, partners or clients to secondary risks once those records leave its control.

What happened

According to the available record, Kurosu & Co.SA - kurosu.com.py was listed by babuk2 on 27 January 2025 under the headline that the organisation had been “LEAKED.” The group asserts that internal files were exfiltrated in a ransomware attack. No further technical details—such as the initial access method, the duration of the intrusion, the volume of data taken, or any ransom demand—have been disclosed in the public summary. The number of individuals whose information may be involved is listed as unknown. At present the listing itself constitutes an unverified claim by the threat actor; independent confirmation of the breach’s full scope has not been provided in the facts available.

The group behind it: babuk2

Babuk2 is associated with the broader Babuk ransomware family, which has operated since at least 2021 and is known for double-extortion tactics: encrypting systems while simultaneously stealing data and threatening to publish it on dedicated leak sites if payment is not made. Groups operating under this banner have historically targeted a range of sectors, including manufacturing, logistics, professional services and government-adjacent entities, often using publicly available tools for initial access and lateral movement before deploying their ransomware payload. They typically post victim names, sample files or full archives on dark-web leak sites to increase pressure. In this case the group claims that Kurosu & Co.SA - kurosu.com.py suffered data exfiltration; no additional statements by babuk2 specific to this victim—beyond the listing and the assertion that internal files were taken—appear in the reported facts. As with other such postings, the claim should be treated as an assertion by the actor until corroborated by the organisation or independent investigators.

Kurosu & Co.SA - kurosu.com.py and its sector

Kurosu & Co.SA operates under the domain kurosu.com.py, indicating a Paraguayan commercial entity structured as a sociedad anónima. Organisations of this type typically manage day-to-day business operations that generate internal documentation—contracts, financial records, correspondence, employee information and operational data. Even without a publicly detailed sector classification in the breach record, any mid-sized company holds material that, if exposed, can affect its workforce, suppliers and clients. A ransomware incident involving such an organisation is consequential because the loss of control over internal files can disrupt operations, create regulatory or contractual obligations, and place personal or commercial information into the hands of criminal actors who may reuse or resell it.

What data was at risk

The facts state that internal files were exfiltrated in the ransomware attack. No more granular inventory—such as specific categories of personal data, financial documents, or customer records—has been disclosed. Organisations of this kind commonly maintain employee personnel files, payroll details, vendor contracts, invoices, internal communications and operational plans. Whether any of those categories were among the files taken remains unconfirmed. Because the precise contents have not been made public, it is not possible to state with certainty what personal or commercial information was exposed; the only confirmed description is the group’s claim of internal-file exfiltration.

Why it matters

When internal files leave an organisation’s control, the people named in those files face concrete risks: identity misuse, targeted phishing, or exposure of sensitive personal circumstances. Employees may discover that payroll, identification or contact details have circulated; business partners may find contractual terms or pricing information published. For the organisation itself, the consequences include potential regulatory scrutiny, contractual liability, reputational damage and the cost of investigation and remediation. Even when the exact volume of data remains unknown, the mere assertion that files were stolen creates a period of uncertainty during which affected individuals cannot know whether their information is circulating. That uncertainty itself can be exploited by secondary scammers who reference the incident to lend credibility to fraud attempts.

Were you affected?

If you have a past or present relationship with Kurosu & Co.SA - kurosu.com.py—as an employee, contractor, client or supplier—consider taking basic protective steps. Monitor financial and email accounts for unexpected activity, enable multi-factor authentication where available, and treat unsolicited messages that reference the company or the breach with caution. Change passwords that may have been reused across services. Because the number of people affected is unknown and the exact data types remain limited to the description “internal files,” there is no definitive public list of victims. Readers can run a free exposure scan of their email address to check whether that address has already appeared in known breach datasets; such a check provides one practical indicator of whether personal information has surfaced elsewhere, though it cannot confirm or rule out involvement in this specific incident.

AICompiled with AI assistance from public sources and published under our editorial standards.