Ville de Houilles

The City of Houilles is a municipal authority located in France. It delivers local government services to residents, including administrative functions and public information provision. The organisation serves the population of Houilles and the surrounding Yvelines area. As a public sector entity, it operates under the regulatory framework of French municipal law. Its core mission is to facilitate civic engagement and provide essential public services to the community. The city’s activities are funded through municipal budgets and are accountable to local elected officials.

In January 2021, the city suffered a cyberattack that disrupted its municipal IT infrastructure. The attack paralyzed the official website, email systems, and digital platforms used for processing citizen requests. Investigators identified South Korean‑origin malware as part of the incident, though specific details were not disclosed. Municipal authorities chose to prioritize containment of the breach over investigating an accompanying ransom note. The Houilles incident occurred amid a wider series of cyberattacks affecting other French municipalities at the same time. One of the related attacks was publicly associated with the Ranzy threat actors via a leak site, although corroborating evidence for that link was lacking when reported.