KISS FM Listed by rhysida Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

KISS FM, a Spanish radio station owned by Mediaset España, has been listed by the rhysida ransomware group as a victim of a cyber attack involving the exfiltration of internal files. The listing was reported on November 05, 2025. Public details remain limited: the number of people affected is unknown, and no further confirmation of the incident beyond the group's claim has been disclosed. For listeners, staff, and partners of a station that reaches audiences through traditional radio waves and online platforms, the report raises questions about the security of operational data held by media organisations.

Ransomware listings of this kind often signal that attackers claim to have stolen material before encrypting systems or demanding payment. In this case, the available information centres solely on the claim of internal files being taken. Understanding what is known—and what is not—helps place the incident in context without speculation.

What happened

According to the reported summary, KISS FM was listed by the rhysida ransomware group on or around November 05, 2025. The group claims that internal files were exfiltrated during a ransomware attack. No public information has been released about the precise date the intrusion began, how the attackers gained access, whether systems were encrypted, or whether any ransom demand was made or paid. The number of people whose data may have been involved remains unknown. The only concrete assertion available is the group's listing itself, which states that internal files belonging to the station were taken. Independent verification of the claim has not been detailed in the available record.

Inside rhysida

Rhysida is a ransomware operation that became publicly active in mid-2023. The group typically employs a double-extortion model: it steals data before encrypting systems and then threatens to publish the stolen material on a dedicated leak site if payment is not received. Rhysida has previously targeted organisations across healthcare, education, government, and private industry, often using phishing or exploitation of unpatched remote-access services as initial entry points. Once inside a network, the group moves laterally, escalates privileges, and packages data for exfiltration. Its leak site is used both to name victims and, in some cases, to release sample files as proof of access. The listing of KISS FM follows this established pattern; the group claims the station as a victim and asserts that internal files were removed. No additional statements from rhysida specifically about this incident—such as file counts, sample screenshots, or deadlines—have been included in the public facts.

KISS FM and its sector

KISS FM is a Spanish radio station that broadcasts popular music and entertainment programming. It is available both over traditional radio frequencies across Spain and via online streaming. The station forms part of the larger Spanish media group Mediaset España, which operates multiple television and radio brands. Media organisations of this type routinely hold a range of operational and audience-related information: employee records, advertising contracts, programming schedules, listener contact details collected through contests or newsletters, and internal communications. Because radio stations sit at the intersection of public broadcasting and commercial media, a breach can affect not only staff and contractors but also the wider ecosystem of advertisers, content partners, and listeners who interact with the brand online. The sector's reliance on continuous on-air and digital operations also means that any disruption to systems can have immediate public visibility.

What was likely exposed

The facts state only that internal files were exfiltrated in a ransomware attack. No specific categories—such as employee personal data, financial records, listener databases, or source material—have been named. Organisations in the radio and media sector typically maintain human-resources files, vendor contracts, advertising invoices, email archives, and databases of audience contacts gathered through promotions or digital services. Whether any of these categories were among the files claimed by rhysida is unconfirmed. The exact contents of the exfiltrated material therefore remain undisclosed. Until further detail is released by the station, its parent company, or independent investigators, it is not possible to state with certainty what information left the network.

What's at stake

For individuals whose data may have been among the internal files, the primary risks include potential misuse of personal or contact information for phishing, identity fraud, or unsolicited contact. Employees and freelancers could face exposure of payroll, identification, or performance-related documents. Advertisers and partners might see contractual or commercial details surface. For KISS FM and Mediaset España, the stakes include operational disruption, reputational damage among listeners and commercial clients, and the cost of investigation and remediation. Because the station reaches a broad Spanish audience through both terrestrial and online channels, any confirmed leak of audience-related data could erode trust in the brand's handling of listener information. These consequences remain potential rather than proven, given that the scale and precise nature of the data remain unknown.

If your data was in this claimed breach

Anyone who has worked for, advertised with, or supplied personal details to KISS FM should treat the report as a prompt for basic hygiene rather than confirmed compromise. Change passwords associated with any accounts linked to the station, enable multi-factor authentication where available, and monitor financial and email accounts for unusual activity. Be alert to phishing messages that reference the radio station or claim to offer updates about the incident. Because the number of affected people and the exact data types are undisclosed, there is no definitive list of victims. Readers can run a free exposure scan of their email address to check whether that address has already appeared in other known breach data sets; such a scan provides an additional layer of awareness while official details remain limited.

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