Cyber Threat Actor: Stadgenoot Hackers

Stadgenoot Hackers is a threat actor known by that alias and is associated with the Netherlands, as indicated by the location information provided in the source material. The actor has been linked to two distinct cyber incidents that occurred in early 2021, both of which involved the compromise of web‑facing assets. No additional aliases or geographic details beyond the Netherlands are mentioned in the available references.

The actor’s observed targeting includes a popular 3D graphics software platform and a Dutch housing corporation, suggesting activity across the technology and real‑estate sectors within the Netherlands. In the first incident, the actor’s actions led to the main website subdomain of the software provider entering maintenance mode, causing partial outages and error messages while leaving core services such as the wiki, developer portal, git repositories and chat system unaffected. In the second incident, the actor gained unauthorized access to the housing corporation’s website, resulting in the exfiltration of personal data belonging to up to 30,000 individuals, including names, addresses, email addresses, license plate numbers and indications of annual income; the organization attributed the breach to a compromise of its web‑hosting provider. These cases demonstrate a pattern of focusing on web‑based infrastructure rather than internal networks or critical industrial systems.

The reported tactics involve exploiting vulnerabilities in web‑hosting environments to achieve unauthorized access to customer websites, followed by either service disruption through maintenance‑mode redirects or data theft for potential misuse. No specific malware families, toolkits, or initial‑access vectors such as phishing or credential dumping are described in the sources, and no public attribution to a state sponsor, criminal consortium or other affiliations is provided. Consequently, the profile is limited to the confirmed facts of the actor’s alias, geographic association, observed targets, the nature of the two disclosed operations and the general TTP theme of web‑hosting‑provider‑leveraged website compromise. No further conclusions about motives, sophistication, size or strategic objectives can be drawn from the available information.