Critical Threat
IP 45.139.122.80 is a high-risk Dutch address associated with sustained malicious activity, primarily categorized as hacking, exploited-host behavior and web application attacks, with a threat level of 8/10 and a 94% confidence rating across 263 total reports. The IP was first flagged in April 2026 and remains active as of May 2026, indicating persistent engagement with target infrastructure.
Detection data reveals 263 abuse reports attributed to 20 automated honeypot sensors, with activity frequency rated 8/10. The address originates from AS206264 operated by Amarutu Technology Ltd in the Netherlands. Suricata intrusion-detection alerts tied to this IP include HTTP request excessive header repetition events and application-layer protocol anomalies, consistent with automated exploitation toolchains probing web-facing services. The majority of recent reports classify the activity as general hacking attempts, supplemented by evidence of an exploited-host pattern and targeted web application probes.
The dominant threat classification reflects systematic intrusion activity. Excessive HTTP header repetition is a recognized technique used by exploit frameworks to evade detection or trigger parser differentials in web servers and applications. The presence of exploited-host markers suggests this infrastructure may itself be a compromised system weaponized for further attacks, amplifying its danger to exposed services. Web application attack patterns indicate reconnaissance and exploitation attempts against application-layer vulnerabilities.
Network defenders should block 45.139.122.80 at the firewall level and monitor for any follow-on connections from adjacent IP ranges within AS206264. Implementing rate-limiting on HTTP endpoints, enforcing header-length constraints and deploying a web application firewall will mitigate the observed probe patterns. Regular patching of web-facing software and the use of intrusion detection systems such as fail2ban or Snort signatures covering anomalous HTTP headers are strongly recommended. Organizations experiencing repeated contact from this address should consider notifying Amarutu Technology Ltd to report potential compromise of their infrastructure.
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