Intermediate Threat
IP 213.209.157.154, allocated to Moon Dc and operating within German network AS208485, presents a medium-risk profile with a threat level of 5 out of 10 based on 1532 accumulated abuse reports, though its current activity frequency registers at zero, indicating a cessation of hostile operations since September 2025.
The address accumulated these reports exclusively through automated honeypot sensors, with the dominant detected threat category being Email Spam, accounting for the most recent 20 reported incidents. The timeframe of both first and last reports spans September 2025, suggesting a concentrated burst of malicious activity during that period rather than sustained long-term abuse. The 55% confidence score reflects moderate certainty in the assessment, as the high volume of historical reports contrasts with the apparent absence of recent hostile behaviour. Geographic and network attribution places this infrastructure within Germany under the Moon Dc autonomous system, though the specific hosting arrangement remains unverified beyond ASN registration data.
Email spam operations represent a significant threat vector, enabling mass distribution of unsolicited commercial messages, phishing payloads, and malware delivery campaigns. An IP address involved in such activity can damage a sender's reputation, trigger blocklist inclusions, and serve as a relay point for fraudulent communications targeting end users. The concrete risk to exposed mail servers includes resource exhaustion, reputation degradation, and potential compromise of downstream recipients through social engineering or malicious attachments.
Site operators running publicly accessible services should implement rate limiting on SMTP submission endpoints and enforce strong authentication mechanisms such as multi-factor authentication for administrative access. Deploying fail2ban or equivalent intrusion-prevention tools can automatically block IPs exhibiting abusive patterns. Maintaining updated blocklists and monitoring feeds helps identify compromised or malicious infrastructure before it reaches end users. Organizations should also ensure proper SPF, DKIM, and DMARC email authentication is configured to prevent spoofing and validate incoming message legitimacy.
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