WDNA Listed by fog Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

Ransomware groups continue to target specialised technology firms whose work underpins critical infrastructure monitoring, turning operational data into leverage for extortion. In this landscape, listings on criminal leak sites have become a common first public signal that an organisation may have suffered a breach, even when independent confirmation remains limited.

On 23 February 2025, the Spanish technology group WDNA appeared on a listing associated with the fog ransomware operation. Public reporting indicates that internal files were claimed to have been exfiltrated during a ransomware attack. The number of people affected is unknown, and further technical detail about the intrusion has not been disclosed. The incident matters because WDNA develops monitoring and auditing tools used across networks, meteorology and critical-infrastructure IoT environments; any compromise of its systems raises questions about the security of the data and operational knowledge it holds.

What happened

According to available public information, WDNA was listed by the fog ransomware group on or around 23 February 2025. The listing asserts that internal files were exfiltrated as part of a ransomware attack. No independent confirmation of the intrusion method, the precise date of compromise, the volume of data taken, or the number of individuals affected has been released. The reported summary identifies WDNA as a Spanish business group with international reach that develops network-monitoring, auditing, meteorology and IoT solutions integrated into its entro© platform. Beyond the claim of internal-file exfiltration, public detail on the incident remains limited.

The group behind it: fog

Fog is a ransomware operation that has appeared in public threat reporting as a group that encrypts victim systems and, in many cases, steals data beforehand to increase pressure for payment. Like other contemporary ransomware actors, fog typically posts victim names and sample data on dedicated leak sites when negotiations stall or to advertise its activity. These listings constitute claims by the group rather than verified forensic findings. Public knowledge of fog’s broader activity includes the use of double-extortion tactics and the targeting of organisations across multiple sectors; however, no specific statements by fog about WDNA beyond the listing itself are recorded in the available facts. Attribution of this particular incident therefore rests on the group’s own claim until further independent evidence emerges.

About WDNA

WDNA, also referred to in public materials as Wireless Domestic Network Auditors, is a Spanish business group with an international presence. It specialises in innovative technologies and solutions for network monitoring and auditing, advanced meteorology, and IoT monitoring of critical infrastructures. These capabilities are integrated into its entro© platform. Organisations of this type routinely handle technical configurations, monitoring data, client-related operational information and intellectual property associated with infrastructure-protection tools. A breach involving such a firm is consequential because the data it processes can include sensitive details about the networks and systems of its customers, many of which may themselves support essential services.

What data was at risk

The only data type named in public reporting is “internal files” said to have been exfiltrated in the ransomware attack. No further breakdown—such as whether the files contained personal data, client records, source code, credentials or operational telemetry—has been disclosed. Organisations that develop network-auditing, meteorological and critical-infrastructure IoT platforms typically store technical documentation, configuration data, monitoring logs, employee information and proprietary software assets. Because the exact contents of the claimed exfiltration remain unconfirmed, it is not possible to state with certainty which categories of information were exposed.

What's at stake

For individuals whose information may have been among the internal files, the primary risks include potential misuse of any personal or contact details that were present, as well as secondary risks if credentials or access tokens were stored in those files. For WDNA itself, the stakes involve possible disruption to its operations, reputational harm, and the need to assess whether any client-related or infrastructure-monitoring data was compromised. Customers that rely on WDNA’s tools for network auditing or critical-infrastructure oversight may face heightened scrutiny of their own environments if shared technical data was taken. Because the scale of the incident and the precise nature of the files remain unknown, the full extent of these risks cannot yet be quantified.

If your data was in this claimed breach

If you believe your information may have been held by WDNA, begin by monitoring financial and online accounts for unusual activity and consider changing passwords associated with any services linked to the company. Enable multi-factor authentication wherever available and remain alert to phishing attempts that could exploit knowledge of a breach. Because the number of people affected and the exact data types are unconfirmed, treat any notification from WDNA or official sources as the authoritative guide. Readers can also run a free exposure scan of their email address to check whether their information has already appeared in known breach data sets, providing an additional early-warning step while further details about this incident develop.

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