Significant Threat
IP 185.218.138.39 is an elevated-risk address operating from US infrastructure (AS205997, Vlad Cojuhari) that has generated 807 abuse reports from automated honeypot sensors, predominantly linked to port-scanning reconnaissance activity conducted at high frequency over a concentrated two-month window between March and May 2026.
The IP's threat profile reflects a sustained and aggressive scanning operation, with 20 recent reports specifically documenting Ciscoasa port scan and probe behaviour detected by honeypot infrastructure. With a confidence score of 91% and an activity frequency rated 8/10, the data indicates persistent, deliberate reconnaissance rather than incidental traffic. The 807 total reports represent a substantial volume of community-sourced abuse data, and the narrow focus on port-scanning techniques suggests a structured, methodical approach to identifying accessible network entry points on target systems.
Port scanning of this nature serves as the initial phase of a multi-stage attack chain. By cataloguing open services and exposed ports on perimeter devices such as Cisco ASA firewalls, threat actors map network topology to identify vulnerable configurations ripe for exploitation. The Ciscoasa-specific probe activity indicates interest in edge security appliances, which, if unpatched or misconfigured, can serve as a direct pathway into internal networks. While port scanning itself is non-invasive, it provides critical intelligence that enables follow-on attacks, including brute-force attempts, credential stuffing, or exploitation of identified services.
Site operators should treat this IP's activity as a clear signal to audit perimeter exposure. Implementing strict firewall rules that deny inbound connections from untrusted sources, minimising the number of exposed services, and deploying rate-limiting mechanisms on authentication endpoints all reduce the effectiveness of reconnaissance. Monitoring logs for scanning patterns originating from this address and blocking it at the network edge provides immediate friction. For Cisco ASA users specifically, ensuring firmware is current and that the device is not exposing unnecessary management interfaces eliminates the vectors this scanning pattern targets.
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