kleinanzeigen-rechnung[.]412838191[.]net

This domain is flagged as a high-risk credential theft operation targeting users of classified advertisement platforms. Analysis indicates the site mimics legitimate invoice notifications to trick victims into entering login credentials, which are then harvested for unauthorized access to accounts or resale on underground markets. The specific threat type is credential theft, not generic phishing, as the infrastructure and content are tailored to impersonate a known brand's billing system. Infrastructure analysis reveals the domain kleinanzeigen-rechnung.412839191.net is hosted on IP 34.111.179.208, leveraging Google Cloud and Google Cloud CDN for delivery. It was registered on June 30, 2026, through Global Domain Group LLC, an uncommon future registration date suggesting potential domain spoofing or typo-squatting. The domain remains active, with 19 out of 95 security vendors on VirusTotal flagging it as malicious. The SSL certificate is issued by Let's Encrypt, providing a false sense of security. Technologies detected include HSTS and HTTP/3, which may be used to evade detection or enhance perceived legitimacy. Mitigation steps for this credential theft campaign include blocking the domain and its resolving IP at the network perimeter. Organizations should deploy email filtering rules to quarantine messages containing links to kleinanzeigen-rechnung.412839191.net or similar patterns. End-users should be educated to verify sender domains, avoid entering credentials on untrusted sites, and report suspicious invoice emails. Security teams are advised to monitor for authentication attempts from the IP 34.111.179.208 and review logs for interactions with the domain. If credentials were exposed, immediate password resets and multi-factor authentication enforcement are recommended.