Ayuntamiento de Velilla de San Antonio Data Breach

Ayuntamiento de Velilla de San Antonio, the municipal government of Velilla de San Antonio in Spain, has been listed as a victim on the Kairos ransomware group’s dark web portal, published on August 20, 2026. The listing was identified through SOCRadar’s Dark Web Monitoring service. The Ayuntamiento de Velilla de San Antonio is the local government body serving the municipality of Velilla de San Antonio in the Community of Madrid, providing civic services including an online employment portal for job seekers. This listing is part of a pattern of ransomware groups targeting municipal and regional government entities in Europe. In the 60 days prior to this listing, Kairos has claimed 6 other victims across its leak portal. The group has shown a targeting pattern in the Manufacturing, Education, and Government & Defense sectors. Geographically, its victims are concentrated in the United States, Canada, and Spain. Other recent Kairos listings that include government and public-sector organizations from similar profiles include Hightech Signs, Warwick Fabrics, Thermalex Inc, and Collège O’Sullivan de Québec. Velilla de San Antonio stands out as Kairos’ Spanish government target, reinforcing the group’s willingness to pursue European municipal institutions.

Initial-access correlation against SOCRadar’s stealer-log telemetry surfaced a notable exposure for the ayto-velilla.es domain. Four credentials were recovered, all targeting the municipality’s online employment portal (bolsaempleo.ayto-velilla.es). The recovered usernames were masked numeric or alphanumeric handles — a pattern consistent with citizens or job seekers accessing a public-facing portal rather than internal municipal employee accounts. While this exposure indicates that public portal credentials for the municipality’s employment services were circulating in infostealer feeds, no direct evidence of internal administrative credential compromise was identified in the queried slice. For ransomware groups such as Kairos, infostealer-harvested credentials are a well-documented initial access vector: operators or initial access brokers source fresh logs from underground marketplaces, validate the credentials, and use them to log into VPN or remote-access portals before deploying ransomware. While the employment portal exposure documented here does not directly indicate corporate or administrative account compromise, municipal portals frequently share authentication infrastructure with internal systems. CTI teams and municipal security officers should assess whether the employment portal’s authentication is isolated from internal network access, and audit administrative account activity for anomalies.

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